#include "insignia.h"
#include "host_def.h"
/*
* SoftPC Revision 2.0
*
* File: : keybd_io.c
*
* Title : Bios Keyboard Interface function
*
* Sccs ID : @(#)keybd_io.c 1.35 06/27/95
*
* Description : This package contains a group of functions that provide
* a logical keyboard interface:
*
* keyboard_init() Initialise the keyboard interface.
* keyboard_int() Deal with a character from the keyboard
* and place them in the BIOS buffer.
* keyboard_io() User routine to read characters from
* the BIOS buffer.
* bios_buffer_size() How many chars in the buffer ?
*
* Author : Rod Macgregor / Henry Nash
*
* Modified : Jon Eyre / Jim Hatfield / Uncle Tom Cobbley and all
*
* Modfications : This module is now designed to be totally portable, it
* represents both the hardware and user interrupt interfaces.
* These two functions are provided by the routines
* keyboard_int & keyboard_io. The system will initialise
* itself by a call to keyboard_init.
*
* The user is expected to supply the following host dependent
* routines for this module, tagged as follows:-
*
* [HOSTSPECIFIC]
*
* host_alarm(duration)
* long int duration ;
* - ring the host's bell.
*
* host_kb_init() - any local initialisations required when
* keyboard_init is called.
*
* Removed calls to cpu_sw_interrupt and replaced with
* host_simulate
*
*/
#ifdef SCCSID
static char SccsID[]="@(#)keybd_io.c 1.35 06/27/95 Copyright Insignia Solutions Ltd.";
#endif
#ifdef SEGMENTATION
/*
* The following #include specifies the code segment into which this
* module will by placed by the MPW C compiler on the Mac II running
* MultiFinder.
*/
#include "SOFTPC_BIOS.seg"
#endif
/*
* O/S include files.
*/
#include <stdio.h>
#include TypesH
#include TimeH
/*
* SoftPC include files
*/
#include "xt.h"
#include CpuH
#include "sas.h"
#include "bios.h"
#include "ios.h"
#include "ppi.h"
#include "keyboard.h"
#include "timeval.h"
#include "timer.h"
#include "keyba.h"
#include "ica.h"
#ifndef PROD
#include "trace.h"
#endif
#include "debug.h"
#include "idetect.h"
/*
* ============================================================================
* External routines
* ============================================================================
*/
/*
* ============================================================================
* Local static data and defines
* ============================================================================
*/
#define SHIFT_KEY_SIZE 8
#define ALT_TABLE_SIZE 36
/*
* lookup table to check if the scan code received is a shift key
*/
static sys_addr shift_keys;
/*
* corresponding table to 'shift_keys' to set relevant bits in masks when
* shift scan code received
*/
static sys_addr shift_masks;
/*
* next two tables give values of chars when control key depressed. First
* table (ctl_n_table) is for main keyboard values and second (ctl_f_table)
* is for the function keys and keypad.
*/
static sys_addr ctl_n_table;
static sys_addr ctl_f_table;
/*
* values of ascii keys dependiing on shift or caps states
*/
static sys_addr lowercase;
static sys_addr uppercase;
/*
* remapping of some keys when alt key depressed. note 1st ten are for
* keypad entries.
*/
static sys_addr alt_table;
/* Add variables for all these entry points instead of the previously used
* defines. This allows modification of these entry points from a loaded
* driver, when the Insignia bios may not be in the loaded in the default
* or assumed location.
*/
#if defined(NTVDM) && defined(LOCAL)
/*
* Make static fns and globals visible to win32 debuggers
*/
#undef LOCAL
#define LOCAL
#endif
#ifndef GISP_SVGA
LOCAL word int15_seg = RCPU_INT15_SEGMENT,
int15_off = RCPU_INT15_OFFSET;
LOCAL word int1b_seg = KEYBOARD_BREAK_INT_SEGMENT,
int1b_off = KEYBOARD_BREAK_INT_OFFSET;
LOCAL word int05_seg = PRINT_SCREEN_INT_SEGMENT,
int05_off = PRINT_SCREEN_INT_OFFSET;
LOCAL word rcpu_nop_segment = RCPU_NOP_SEGMENT,
rcpu_nop_offset = RCPU_NOP_OFFSET;
LOCAL word rcpu_poll_segment = RCPU_POLL_SEGMENT,
rcpu_poll_offset = RCPU_POLL_OFFSET;
#else /* GISP_SVGA */
/* If we are GISP_SVGA the segments will be variables anyway */
#define int15_seg RCPU_INT15_SEGMENT
LOCAL word int15_off = RCPU_INT15_OFFSET;
#define int1b_seg KEYBOARD_BREAK_INT_SEGMENT
LOCAL word int1b_off = KEYBOARD_BREAK_INT_OFFSET;
#define int05_seg PRINT_SCREEN_INT_SEGMENT
LOCAL word int05_off = PRINT_SCREEN_INT_OFFSET;
#define rcpu_nop_segment RCPU_NOP_SEGMENT
LOCAL word rcpu_nop_offset = RCPU_NOP_OFFSET;
#define rcpu_poll_segment RCPU_POLL_SEGMENT
LOCAL word rcpu_poll_offset = RCPU_POLL_OFFSET;
#endif /* GISP_SVGA */
#if defined(IRET_HOOKS) && defined(GISP_CPU)
IMPORT VOID HostAllowKbdInt(); /* Allow keybd Ints without an IRET */
#endif /* IRET_HOOKS && GISP_CPU */
#ifdef NTVDM
#include "error.h"
GLOBAL word wait_int_seg = RCPU_WAIT_INT_SEGMENT;
GLOBAL word wait_int_off = RCPU_WAIT_INT_OFFSET;
GLOBAL word dr_type_seg = DR_TYPE_SEGMENT;
GLOBAL word dr_type_off = DR_TYPE_OFFSET;
GLOBAL sys_addr dr_type_addr = DR_TYPE_ADDR;
/* Global var to indicate whether keyboard bios or hardware owns the keyboard mutex. */
GLOBAL BOOL bBiosOwnsKbdHdw;
IMPORT ULONG WaitKbdHdw(ULONG dwTimeOut);
IMPORT VOID HostReleaseKbd();
IMPORT VOID HostResetKbdNotFullEvent();
IMPORT VOID HostSetKbdNotFullEvent();
GLOBAL VOID TryKbdInt(VOID);
IMPORT VOID ResumeTimerThread(VOID);
IMPORT VOID WaitIfIdle(VOID);
#define FREEKBDHDW() bBiosOwnsKbdHdw = \
( bBiosOwnsKbdHdw ? HostReleaseKbd(), FALSE : FALSE )
/* for optimizing timer hardware interrupt generation defined in timer.c */
extern word TimerInt08Seg;
extern word TimerInt08Off;
extern word TimerInt1CSeg;
extern word TimerInt1COff;
extern word KbdInt09Seg;
extern word KbdInt09Off;
extern BOOL VDMForWOW;
void Keyb16Request(half_word BopFnCode);
/* optimizes 16 bit handler */
extern word *pICounter;
extern word *pCharPollsPerTick;
extern word *pShortIdle;
extern word *pIdleNoActivity;
extern half_word * stream_io_buffer;
extern word * stream_io_dirty_count_ptr;
extern word stream_io_buffer_size;
extern sys_addr stream_io_bios_busy_sysaddr;
#else
#define FREEKBDHDW() /* Nothing for conventional SoftPC */
#endif /* NTVDM */
/*
* Mix in global defined data as well.
*/
#ifndef GISP_SVGA
GLOBAL word rcpu_int1C_seg = USER_TIMER_INT_SEGMENT;
GLOBAL word rcpu_int1C_off = USER_TIMER_INT_OFFSET;
GLOBAL word rcpu_int4A_seg = RCPU_INT4A_SEGMENT;
GLOBAL word rcpu_int4A_off = RCPU_INT4A_OFFSET;
#else /* GISP_SVGA */
/* For GISPSVGA the segs will already be variables */
#define rcpu_int1C_seg = USER_TIMER_INT_SEGMENT;
GLOBAL word rcpu_int1C_off = USER_TIMER_INT_OFFSET;
#define rcpu_int4A_seg = RCPU_INT4A_SEGMENT;
GLOBAL word rcpu_int4A_off = RCPU_INT4A_OFFSET;
#endif /* GISP_SVGA */
GLOBAL word dummy_int_seg = 0;
GLOBAL word dummy_int_off = 0;
#ifdef NTVDM
GLOBAL word int13h_vector_off;
GLOBAL word int13h_vector_seg;
GLOBAL word int13h_caller_off;
GLOBAL word int13h_caller_seg;
#endif /* NTVDM */
#if defined(NTVDM) && defined(MONITOR)
/*
** Microsoft special.
** These variables are set below in kb_setup_vectors(), to addresses
** passed by NTIO.SYS via BOP 5F -> MS_bop_F() -> kb_setup_vectors()
** Tim June 92.
*/
/*
** New ntio.sys variables for video ROM matching. Tim August 92.
*/
GLOBAL word int10_seg=0;
GLOBAL word int10_caller=0;
GLOBAL word int10_vector=0; /* Address of native int 10*/
GLOBAL word useHostInt10=0; /* var that chooses between host video ROM or BOPs */
GLOBAL word babyModeTable=0; /* Address of small mode table lives in ntio.sys */
GLOBAL word changing_mode_flag=0; /* ntio.sys var to indicate vid mode change */
GLOBAL word vga1b_seg = 0;
GLOBAL word vga1b_off = 0; /* VGA capability table normally in ROM */
GLOBAL word conf_15_off = 0;
GLOBAL word conf_15_seg = 0; /* INT15 config table normally in ROM */
void printer_setup_table(sys_addr table_addr);
#endif /* NTVDM & MONITOR */
extern int soft_reset ; /* set for ctl-alt-dels */
/*
* ============================================================================
* Local macros
* ============================================================================
*/
LOCAL VOID exit_from_kbd_int IPT0();
/*
* Function to increment BIOS buffer pointers, returns new one
*/
LOCAL word inc_buffer_ptr IFN1(word, buf_p)
{
buf_p += 2;
if (buf_p == sas_w_at_no_check(BIOS_KB_BUFFER_END))
buf_p = sas_w_at_no_check(BIOS_KB_BUFFER_START);
return buf_p;
}
/*
* ============================================================================
* Internal functions
* ============================================================================
*/
/*
* Routine to translate scan code pairs for standard calls
* Returns CF set if this scancode/char pair should be thrown away.
*/
LOCAL VOID translate_std IFN0()
{
IU8 ah, al;
enum {dontSetCF, setCF0, setCF1} cfSet = dontSetCF;
ah = getAH();
al = getAL();
if ( ah == 0xE0 ) /* is it keypad enter or / */
{
if ( (al == 0x0D) || (al == 0x0A) )
setAH( 0x1C ); /* code is enter */
else
setAH( 0x35 ); /* must be keypad ' / ' */
cfSet = setCF0;
}
else
{
if ( ah > 0x84 ) /* is it an extended one */
cfSet = setCF1;
else
{
if( al == 0xF0 ) /* is it one of the 'fill ins' */
{
if ( ah == 0) /* AH = 0 special case */
cfSet = setCF0;
else
cfSet = setCF1; /* Delete me */
}
else
{
if ( (al == 0xE0) && (ah != 0) )
setAL( 0 ); /* convert to compatible output */
cfSet = setCF0;
}
}
}
if (cfSet != dontSetCF)
setCF(cfSet == setCF1);
}
static void translate_ext()
/*
* Routine to translate scan code pairs for extended calls
*/
{
if ( (getAL() == 0xF0 ) && (getAH() != 0) )
setAL( 0 );
}
/*
* Send command or data byte to the keyboard and await for the acknowledgemnt
*/
/*
* Arbitrary retry limits - experiments suggest that we always succeed
* on the first try in a pure SoftWindows. A "real keyboard" version may
* be different.
*/
#define WAIT_RETRY 5
#define RESEND_RETRY 3
LOCAL VOID send_data IFN1(half_word, data)
{
int resend_retry;
word CS_save, IP_save;
half_word var_kb_flag_2;
note_trace1(BIOS_KB_VERBOSE,"Cmd to kb i/o buff:0x%x",data);
/*
* Save CS:IP before calling a recursive CPU to handle the interrupt
* from the keyboard
*/
CS_save = getCS();
IP_save = getIP();
/*
* Set the retry flag ( KB_FE ) to force outb() at least once. If
* we have real keyboard hardware this may get set again if the
* hardware didn't understand the command for some reason e.g.
* garbled by the serial line.
*/
var_kb_flag_2 = sas_hw_at(kb_flag_2) | KB_FE;
resend_retry = RESEND_RETRY;
do
{
IBOOL resend_command;
int wait_retry;
resend_command = (var_kb_flag_2 & KB_FE) != 0;
wait_retry = WAIT_RETRY;
/* Clear resend, acknowledge and error flags */
var_kb_flag_2 &= ~(KB_FE + KB_FA + KB_ERR);
/*
* Update Intel memory with cleared down flags *BEFORE*
* the outb(), which may set the acknowledge flag, if we
* execute enough Intel due to virtualisation.
*/
sas_store(kb_flag_2, var_kb_flag_2);
/* Do the outb if necessary */
if( resend_command )
{
outb(KEYBA_IO_BUFFERS, data);
}
/* Look for one of the flag bits to be set or time out */
while( !(var_kb_flag_2 & (KB_FA + KB_FE + KB_ERR))
&& ( --wait_retry > 0 ))
{
/*
* Process interrupt from kb.
*
* Note for perplexed keyboard debuggers:
* Keyboard interrupts are delayed for a few
* Intel instructions using quick events. This
* means that the IRR from the above outb() may
* not be raised until we have done the following
* sub-CPU a few times.
*/
setCS(rcpu_nop_segment);
setIP(rcpu_nop_offset);
host_simulate();
/* Re-read flag byte to see if anything has happened */
var_kb_flag_2 = sas_hw_at(kb_flag_2);
}
/* If we got an acknowledge we've succeeded */
if (var_kb_flag_2 & KB_FA)
break;
/* Set up error flag (in case this is the last retry) */
note_trace0(BIOS_KB_VERBOSE,"failed to get ack ... retry");
var_kb_flag_2 |= KB_ERR;
}
while( --resend_retry > 0 );
if (var_kb_flag_2 & KB_ERR)
{
note_trace0(BIOS_KB_VERBOSE,"no more retrys");
/* Write back flags with error bit set */
sas_store(kb_flag_2, var_kb_flag_2);
}
setCS(CS_save);
setIP(IP_save);
}
LOCAL VOID check_indicators IFN1(IBOOL, eoi)
/* end of interrupt flag - if set to non-zero */
/* 0x20 is written to port 0x20 */
{
half_word indicators ;
half_word var_kb_flag_2;
/* move switch indicators to bits 0-2 */
indicators = (sas_hw_at_no_check(kb_flag) & (CAPS_STATE + NUM_STATE + SCROLL_STATE)) >> 4;
var_kb_flag_2 = sas_hw_at_no_check(kb_flag_2);
/* compare with previous setting */
if ((indicators ^ var_kb_flag_2) & KB_LEDS)
{
/* check if update in progress */
if( (var_kb_flag_2 & KB_PR_LED) == 0)
{
/* No update in progress */
var_kb_flag_2 |= KB_PR_LED;
sas_store_no_check(kb_flag_2, var_kb_flag_2);
if (eoi)
outb(0x20, 0x20);
#if defined(NTVDM) || defined(GISP_CPU)
/*
* On the NT port we do not update the real kbd lights
* so we don't need to do communicate with the kbd hdw (keyba.c)
*
* If this ever changes for the NT port then do not use
* send_data which forces us to switch context back to
* 16 bit and waits for a reply. Do this with a direct
* call to the kbd Hdw
*
*/
/* set kb flag up with new status */
var_kb_flag_2 = (var_kb_flag_2 & 0xf8) | indicators;
sas_store_no_check(kb_flag_2, var_kb_flag_2);
#ifdef NTVDM
host_kb_light_on (indicators);
#endif
#ifdef GISP_CPU
/*
** We do update an emulation of the keyboard lights but we don't
** want to do it via send_data and switching back to 16-bit.
** We call the host routines directly.
*/
host_kb_light_on (indicators);
host_kb_light_off ((~indicators)&0x7);
#endif /* GISP_CPU */
#else /* not NTVDM nor GISP_CPU */
send_data(LED_CMD);
/* set kb flag up with new status */
var_kb_flag_2 = (sas_hw_at_no_check(kb_flag_2) & 0xf8) | indicators;
sas_store_no_check(kb_flag_2, var_kb_flag_2);
/* check error from previous send_data() */
if( (var_kb_flag_2 & KB_ERR) == 0)
{
/* No error */
send_data(indicators);
/* test for error */
if(sas_hw_at_no_check(kb_flag_2) & KB_ERR) {
/* error! */
note_trace0(BIOS_KB_VERBOSE,"got error sending change LEDs command");
send_data(KB_ENABLE);
}
}
else
/* error! */
send_data(KB_ENABLE);
#endif /* NTVDM or GISP_CPU */
/* turn off update indicator and error flag */
sas_store_no_check (kb_flag_2, sas_hw_at_no_check(kb_flag_2) & ~(KB_PR_LED + KB_ERR));
}
}
}
/*
* ============================================================================
* External functions
* ============================================================================
*/
/*
** called from hunter.c:do_hunter()
** tells hunter about the BIOS buffer size so it will not over fill
** the BIOS buffer
** Used in no Time Stamp mode only.
**
** Also useful in host paste code to make sure keys are not pasted in too
** fast.
*/
int bios_buffer_size IPT0()
{
word buffer_head, buffer_tail;
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
note_trace2( BIOS_KB_VERBOSE, "BIOS kbd buffer head=%d tail=%d",
buffer_head, buffer_tail );
if( buffer_tail > buffer_head )
return( buffer_tail - buffer_head );
else
return( buffer_head - buffer_tail );
}
LOCAL VOID K26A IFN0()
{
/* Interrupt Return */
outb(0x20, 0x20);
outb(KEYBA_STATUS_CMD, ENA_KBD);
}
LOCAL VOID K26 IFN0()
{
/* Reset last char H.C. flag */
sas_store_no_check(kb_flag_3, sas_hw_at_no_check(kb_flag_3) & ~(LC_E0 + LC_E1));
/* (same as K26A()) */
outb(0x20, 0x20);
outb(KEYBA_STATUS_CMD, ENA_KBD);
}
#ifndef NTVDM
LOCAL VOID INT15 IFN0()
{
word saveCS, saveIP;
saveCS = getCS();
saveIP = getIP();
setCS(int15_seg);
setIP(int15_off);
host_simulate();
setCS(saveCS);
setIP(saveIP);
}
#else /* NTVDM */
void INT15(void);
word sp_int15_handler_seg = 0;
word sp_int15_handler_off = 0;
#endif /* NTVDM */
#ifndef NTVDM
#define BEEP(message) always_trace0(message); \
host_alarm(250000L); \
K26A()
#else /* NTVDM */
/* NTVDM code size is too large, change this often used macro
* to a function, as the call overhead is not justified
*/
void BEEP(char *message)
{
note_trace0(BIOS_KB_VERBOSE,message);
host_alarm(250000L);
K26A();
}
#endif /* NTVDM */
/*
** Tell ICA End of Interrupt has happened, the ICA will
** allow interupts to go off again.
** Call INT 15.
** Reenable the Keyboard serial line so Keyboard
** interrupts can go off.
** NOTE:
** this is different to the real BIOS. The real BIOS
** does ICA, Keyboard then INT 15, if we do that Keyboard
** interrupts occur too soon, during the INT 15 and blow the
** DOS stack. We effectively stop Keybd interrupts during the
** INT 15.
**
** <tur 17-Jun-93> Take a leaf outta NTVDM's book and make these
** functions rather than macros. (This reduced the size of keybd_io.c.o
** on the Mac from 38K to 12K!) After all, it isn't as if keyboards are
** highly speed sensitive!
*/
#ifndef NTVDM
LOCAL VOID PutInBufferFunc IFN2(half_word, s, half_word, v)
{
word buffer_head, buffer_tail, buffer_ptr;
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_ptr = inc_buffer_ptr(/* from: */buffer_tail);
if (buffer_ptr == buffer_head) {
BEEP("BIOS keyboard buffer overflow");
}
else {
sas_store_no_check(BIOS_VAR_START + buffer_tail, v);
sas_store_no_check(BIOS_VAR_START + buffer_tail+1, s);
sas_storew_no_check(BIOS_KB_BUFFER_TAIL, buffer_ptr);
outb(0x20, 0x20);
setAX(0x9102);
INT15();
outb(KEYBA_STATUS_CMD, ENA_KBD);
sas_store (kb_flag_3, sas_hw_at(kb_flag_3) & ~(LC_E0 + LC_E1));
setIF(0);
}
exit_from_kbd_int();
}
#else /* NTVDM */
/* <tur> NT's PutInBuffer seems to be slightly different to PutInBufferFunc above. */
/* So I'm Not Touching it! (Is this a good expansion of "NT"? :-) */
/* Our code size is too large, change this often used macro
* to a function, as the call overhead is not justified
*/
void NtPutInBuffer(half_word s, half_word v)
{
word buffer_head, buffer_tail, buffer_ptr;
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_ptr = inc_buffer_ptr(/* from: */buffer_tail);
if (buffer_ptr == buffer_head) {
BEEP("BIOS keyboard buffer overflow");
}
else {
sas_store_no_check(BIOS_VAR_START + buffer_tail, v);
sas_store_no_check(BIOS_VAR_START + buffer_tail+1, s);
sas_storew_no_check(BIOS_KB_BUFFER_TAIL, buffer_ptr);
setAX(0x9102);
INT15();
K26();
setIF(0);
}
exit_from_kbd_int();
}
#define PUT_IN_BUFFER(s, v) NtPutInBuffer(s,v); return
#endif /* NTVDM */
/* <tur 17-Jun-93> Eurrgh; macros with embedded "return"s! */
#ifndef NTVDM
#define PUT_IN_BUFFER(s, v) PutInBufferFunc(s,v); return
#endif /* !NTVDM */
LOCAL VOID CheckAndPutInBufferFunc IFN2(half_word, s,half_word, v)
{
if ((s == 0xff) || (v == 0xff)) {
K26();
exit_from_kbd_int();
}
else {
#ifndef NTVDM
PutInBufferFunc(s, v);
#else /* NTVDM */
NtPutInBuffer(s, v);
#endif /* !NTVDM */
}
}
#define CHECK_AND_PUT_IN_BUFFER(s,v) CheckAndPutInBufferFunc(s, v); return
LOCAL VOID PAUSE IFN0()
{
word CS_save; /* tmp. store for CS value */
word IP_save; /* tmp. store for IP value */
sas_store_no_check(kb_flag_1, sas_hw_at_no_check(kb_flag_1) | HOLD_STATE);
outb(KEYBA_STATUS_CMD, ENA_KBD);
outb(0x20, 0x20);
CS_save = getCS();
IP_save = getIP();
FREEKBDHDW();
do {
#if defined(IRET_HOOKS) && defined(GISP_CPU)
HostAllowKbdInt(); /* Allow a keypress to generate an interrupt */
#endif /* IRET_HOOKS && GISP_CPU */
#if defined(NTVDM)
IDLE_waitio();
#endif
setCS(rcpu_nop_segment);
setIP(rcpu_nop_offset);
host_simulate();
} while (sas_hw_at_no_check(kb_flag_1) & HOLD_STATE);
setCS(CS_save);
setIP(IP_save);
outb(KEYBA_STATUS_CMD, ENA_KBD);
}
#ifndef NTVDM
static int re_entry_level=0;
#endif
/*
** All exits from keyboard_int() call this first.
*/
LOCAL void exit_from_kbd_int IFN0()
{
#ifndef NTVDM
--re_entry_level;
if( re_entry_level >= 4 )
always_trace1("ERROR: KBD INT bad exit level %d", re_entry_level);
#endif
note_trace0( BIOS_KB_VERBOSE, "KBD BIOS - END" );
setIF( 0 );
FREEKBDHDW(); /* JonLe NTVDM Mod */
}
void keyboard_int IFN0()
{
int i; /* loop counter */
half_word code, /* scan code from keyboard */
code_save, /* tmp variable for above */
chr, /* ASCII char code */
last_kb_flag_3, /* kb_flag_3 saved */
mask;
#ifdef NTVDM
word IP_save,
buffer_head, /* ptr. to head of kb buffer */
buffer_tail; /* ptr. to tail of kb buffer */
half_word BopFnCode;
#endif /* NTVDM */
boolean upper; /* flag indicating upper case */
#ifdef NTVDM
BopFnCode = getAH();
if (BopFnCode) {
Keyb16Request(BopFnCode);
return;
}
#endif
#ifndef NTVDM
++re_entry_level;
if( re_entry_level > 4 ){
always_trace1("ERROR: KBD BIOS re-entered at level %d\n", re_entry_level-1);
}
#endif
setIF(0);
note_trace0(BIOS_KB_VERBOSE,"KBD BIOS start");
#ifdef NTVDM /* JonLe keyboard mod */
bBiosOwnsKbdHdw = !WaitKbdHdw(5000);
#endif /* NTVDM */
/* disable keyboard */
outb(KEYBA_STATUS_CMD, DIS_KBD);
#ifdef NTVDM
/*
* CarbonCopy traces int 9 in order to gain control
* over where the kbd data is coming from (the physical kbd
* or the serial link) The kbd_inb instruction must be visible
* in the 16 bit code via int 1 tracing, for CarbonCopy to work.
* interrupts should be kept off.
*/
if (getTF()) {
IP_save = getIP();
setIP(IP_save + 4); /* adavance by 4 bytes, pop ax, jmp iret_com */
host_simulate();
setIP(IP_save);
code = getAL();
}
else
#endif
inb(KEYBA_IO_BUFFERS, &code); /* get scan_code */
/* call recursive CPU to handle int 15 call */
setAH(0x4f);
setAL(code);
setCF(1); /* Default return says scan code NOT consumed - needed by Freelance Plus 3.01 */
INT15();
code = getAL(); /* suret int 15 function can change the scan code in AL */
if(!getCF()) /* check CF */
{
K26();
exit_from_kbd_int();return;
}
if ( code == KB_RESEND ) /* check for resend */
{
sas_store_no_check (kb_flag_2, sas_hw_at_no_check(kb_flag_2) | KB_FE);
K26();
exit_from_kbd_int();return;
}
if( code == KB_ACK ) /* check for acknowledge */
{
sas_store_no_check (kb_flag_2, sas_hw_at_no_check(kb_flag_2) | KB_FA);
K26();
exit_from_kbd_int();return;
}
check_indicators(0);
if ( code == KB_OVER_RUN ) /* test for overrun */
{
BEEP("hardware keyboard buffer overflow");
exit_from_kbd_int();return;
}
last_kb_flag_3 = sas_hw_at_no_check(kb_flag_3);
/* TEST TO SEE IF A READ_ID IS IN PROGRESS */
if ( last_kb_flag_3 & (RD_ID + LC_AB) )
{
if ( sas_hw_at_no_check(kb_flag) & RD_ID ) /* is read_id flag on */
{
if( code == ID_1 ) /* is this the 1st ID char. */
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3) | LC_AB);
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3) & ~RD_ID);
}
else
{
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3) & ~LC_AB);
if( code != ID_2A ) /* is this the 2nd ID char. */
{
if( code == ID_2 )
{
/* should we set NUM LOCK */
if( last_kb_flag_3 & SET_NUM_LK )
{
sas_store_no_check (kb_flag, sas_hw_at_no_check(kb_flag) | NUM_STATE);
check_indicators(1);
}
}
else
{
K26();
exit_from_kbd_int();return;
}
}
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3) | KBX); /* enhanced kbd found */
}
K26();
exit_from_kbd_int();return;
}
if( code == MC_E0 ) /* general marker code? */
{
sas_store_no_check(kb_flag_3, sas_hw_at_no_check(kb_flag_3) | ( LC_E0 + KBX ));
K26A();
exit_from_kbd_int();return;
}
if( code == MC_E1 ) /* the pause key ? */
{
sas_store_no_check (kb_flag_3, sas_hw_at_no_check (kb_flag_3) | ( LC_E1 + KBX ));
K26A();
exit_from_kbd_int();return;
}
code_save = code; /* turn off break bit */
code &= 0x7f;
if( last_kb_flag_3 & LC_E0) /* last code=E0 marker? */
{
/* is it one of the shift keys */
if( code == sas_hw_at_no_check(shift_keys+6) || code == sas_hw_at_no_check(shift_keys+7) )
{
K26();
exit_from_kbd_int();return;
}
}
else if( last_kb_flag_3 & LC_E1 ) /* last code=E1 marker? */
{
/* is it alt, ctl or one of the shift keys */
if( code == sas_hw_at_no_check(shift_keys+4) || code == sas_hw_at_no_check(shift_keys+5) ||
code == sas_hw_at_no_check(shift_keys+6) || code == sas_hw_at_no_check(shift_keys+7) )
{
K26A();
exit_from_kbd_int();return;
}
if( code == NUM_KEY ) /* is it the pause key */
{
/* is it the break or are we paused already */
if( (code_save & 0x80) || (sas_hw_at_no_check(kb_flag_1) & HOLD_STATE) )
{
K26();
exit_from_kbd_int();return;
}
PAUSE();
exit_from_kbd_int();return;
}
}
/* TEST FOR SYSTEM KEY */
else if( code == SYS_KEY )
{
if( code_save & 0x80 ) /* check for break code */
{
sas_store_no_check(kb_flag_1, sas_hw_at_no_check(kb_flag_1) & ~SYS_SHIFT);
K26A();
/* call recursive CPU to call INT 15 */
setAX(0x8501);
INT15();
exit_from_kbd_int();return;
}
if( sas_hw_at_no_check(kb_flag_1) & SYS_SHIFT) /* Sys key held down ? */
{
K26();
exit_from_kbd_int();return;
}
sas_store_no_check (kb_flag_1, sas_hw_at_no_check(kb_flag_1) | SYS_SHIFT);
K26A();
/* call recursive CPU to call INT 15 */
setAX(0x8500);
INT15();
exit_from_kbd_int();return;
}
/* TEST FOR SHIFT KEYS */
for( i=0; i < SHIFT_KEY_SIZE; i++)
if ( code == sas_hw_at_no_check(shift_keys+i) )
break;
code = code_save;
if( i < SHIFT_KEY_SIZE ) /* is there a match */
{
mask = sas_hw_at_no_check (shift_masks+i);
if( code & 0x80 ) /* test for break key */
{
if (mask >= SCROLL_SHIFT) /* is this a toggle key */
{
sas_store_no_check (kb_flag_1, sas_hw_at_no_check(kb_flag_1) & ~mask);
K26();
exit_from_kbd_int();return;
}
sas_store_no_check (kb_flag, sas_hw_at_no_check(kb_flag) & ~mask); /* turn off shift bit */
if( mask >= CTL_SHIFT) /* alt or ctl ? */
{
if( sas_hw_at_no_check (kb_flag_3) & LC_E0 ) /* 2nd alt or ctl ? */
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3) & ~mask);
else
sas_store_no_check (kb_flag_1, sas_hw_at_no_check(kb_flag_1) & ~(mask >> 2));
sas_store_no_check (kb_flag, sas_hw_at_no_check(kb_flag) | ((((sas_hw_at_no_check(kb_flag) >>2 ) | sas_hw_at(kb_flag_1)) << 2) & (ALT_SHIFT + CTL_SHIFT)));
}
if(code != (ALT_KEY + 0x80)) /* alt shift release ? */
{
K26();
exit_from_kbd_int();return;
}
code = sas_hw_at_no_check(alt_input);
if ( code == 0 ) /* input == 0 ? */
{
K26();
exit_from_kbd_int();return;
}
sas_store_no_check(alt_input, 0); /* Zero the ALT_INPUT char */
/* At this point, the ALT input char (now in "code") should be put in the buffer. */
PUT_IN_BUFFER(0, code);
#ifdef NTVDM
return;
#endif
}
/* SHIFT MAKE FOUND, DETERMINE SET OR TOGGLE */
if( mask < SCROLL_SHIFT )
{
sas_store_no_check (kb_flag, sas_hw_at_no_check(kb_flag) | mask);
if ( mask & (CTL_SHIFT + ALT_SHIFT) )
{
if( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) /* one of the new keys ?*/
sas_store_no_check(kb_flag_3, sas_hw_at_no_check(kb_flag_3) | mask); /* set right, ctl alt */
else
sas_store_no_check (kb_flag_1,sas_hw_at_no_check(kb_flag_1) | (mask >> 2)); /* set left, ctl alt */
}
K26();
exit_from_kbd_int();return;
}
/* TOGGLED SHIFT KEY, TEST FOR 1ST MAKE OR NOT */
if( (sas_hw_at_no_check(kb_flag) & CTL_SHIFT) == 0 )
{
if( code == INS_KEY )
{
if( sas_hw_at_no_check(kb_flag) & ALT_SHIFT )
goto label1;
if( (sas_hw_at_no_check(kb_flag_3) & LC_E0) == 0 ) /* the new insert key ? */
{
/* only continue if NUM_STATE flag set OR
one or both of the shift flags */
if( ((sas_hw_at_no_check(kb_flag) &
(NUM_STATE + LEFT_SHIFT + RIGHT_SHIFT))
== NUM_STATE) ||
(((sas_hw_at_no_check(kb_flag) & NUM_STATE) == 0)
&& (sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT))) )
goto label1;
}
}
/* shift toggle key hit */
if( mask & sas_hw_at_no_check(kb_flag_1) ) /* already depressed ? */
{
K26();
exit_from_kbd_int();return;
}
sas_store_no_check (kb_flag_1, sas_hw_at_no_check(kb_flag_1) | mask); /* set and toggle flags */
sas_store_no_check ( kb_flag, sas_hw_at_no_check(kb_flag) ^ mask);
if( mask & (CAPS_SHIFT + NUM_SHIFT + SCROLL_SHIFT) )
check_indicators(1);
if( code == INS_KEY ) /* 1st make of ins key */
goto label2;
K26();
exit_from_kbd_int();return;
}
}
label1: /* TEST FOR HOLD STATE */
if( code & 0x80 ) /* test for break */
{
K26();
exit_from_kbd_int();return;
}
if( sas_hw_at_no_check(kb_flag_1) & HOLD_STATE ) /* in hold state ? */
{
if( code != NUM_KEY )
sas_store_no_check (kb_flag_1, sas_hw_at_no_check(kb_flag_1) & ~HOLD_STATE);
K26();
exit_from_kbd_int();return;
}
label2: /* NOT IN HOLD STATE */
if( code > 88) /* out of range ? */
{
K26();
exit_from_kbd_int();return;
}
/* are we in alternate shift */
if( (sas_hw_at_no_check(kb_flag) & ALT_SHIFT) && ( ((sas_hw_at_no_check(kb_flag_3) & KBX) == 0) ||
((sas_hw_at_no_check(kb_flag_1) & SYS_SHIFT) == 0) ) )
{
/* TEST FOR RESET KEY SEQUENCE (CTL ALT DEL) */
if( (sas_hw_at_no_check(kb_flag) & CTL_SHIFT ) && (code == DEL_KEY) )
{
#ifndef NTVDM
reboot();
#else
K26();
#endif
exit_from_kbd_int();return;
}
/* IN ALTERNATE SHIFT, RESET NOT FOUND */
if( code == SPACEBAR )
{
PUT_IN_BUFFER(code, ' ');
}
if( code == TAB_KEY )
{
PUT_IN_BUFFER(0xa5, 0 ); /* special code for alt-tab */
}
if( (code == KEY_PAD_MINUS) || (code == KEY_PAD_PLUS) )
{
PUT_IN_BUFFER(code, 0xf0); /* special ascii code */
}
/* LOOK FOR KEYPAD ENTRY */
for (i = 0; i < 10; i++ )
if ( code == sas_hw_at_no_check (alt_table+i) )
break;
if( i < 10 )
{
if( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) /* one of the new keys ? */
{
PUT_IN_BUFFER((code + 80), 0 );
}
sas_store_no_check (alt_input, sas_hw_at_no_check(alt_input) * 10 + i);
K26();
exit_from_kbd_int();return;
}
/* LOOK FOR SUPERSHIFT ENTRY */
for( i = 10; i < ALT_TABLE_SIZE; i++)
if( code == sas_hw_at_no_check (alt_table+i))
break;
if( i < ALT_TABLE_SIZE )
{
PUT_IN_BUFFER(code, 0 );
}
/* LOOK FOR TOP ROW OF ALTERNATE SHIFT */
if( code < TOP_1_KEY )
{
CHECK_AND_PUT_IN_BUFFER(code, 0xf0); /* must be escape */
}
if( code < BS_KEY )
{
PUT_IN_BUFFER((code + 118), 0);
}
/* TRANSLATE ALTERNATE SHIFT PSEUDO SCAN CODES */
if((code == F11_M) || (code == F12_M) ) /* F11 or F12 */
{
PUT_IN_BUFFER((code + 52), 0 );
}
if( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) /* one of the new keys ?*/
{
if( code == KEY_PAD_ENTER )
{
PUT_IN_BUFFER(0xa6, 0);
}
if( code == DEL_KEY )
{
PUT_IN_BUFFER(( code + 80), 0 );
}
if( code == KEY_PAD_SLASH )
{
PUT_IN_BUFFER(0xa4, 0);
}
K26();
exit_from_kbd_int();return;
}
if( code < F1_KEY )
{
CHECK_AND_PUT_IN_BUFFER(code, 0xf0);
}
if( code <= F10_KEY )
{
PUT_IN_BUFFER( (code + 45), 0 );
}
K26();
exit_from_kbd_int();return;
}
/* NOT IN ALTERNATE SHIFT */
if(sas_hw_at_no_check(kb_flag) & CTL_SHIFT) /* control shift ? */
{
if( (code == SCROLL_KEY) && ( ((sas_hw_at_no_check(kb_flag_3) & KBX) == 0) || (sas_hw_at_no_check(kb_flag_3) & LC_E0) ) )
{
/* reset buffer to empty */
sas_storew_no_check(BIOS_KB_BUFFER_TAIL, sas_w_at_no_check(BIOS_KB_BUFFER_HEAD));
sas_store (bios_break, 0x80); /* turn on bios brk bit */
outb(KEYBA_STATUS_CMD, ENA_KBD); /* enable keyboard */
FREEKBDHDW(); /* JonLe NTVDM mod */
exec_sw_interrupt(int1b_seg, int1b_off);
PUT_IN_BUFFER(0, 0);
}
/* TEST FOR PAUSE */
if( ((sas_hw_at_no_check(kb_flag_3) & KBX) == 0) && (code == NUM_KEY))
{
PAUSE();
exit_from_kbd_int();return;
}
/* TEST SPECIAL CASE KEY 55 */
if( code == PRINT_SCR_KEY )
{
if ( ((sas_hw_at_no_check(kb_flag_3) & KBX) == 0) || (sas_hw_at_no_check(kb_flag_3) &LC_E0) )
{
PUT_IN_BUFFER(0x72, 0);
}
}
else
{
if( code != TAB_KEY )
{
if( (code == KEY_PAD_SLASH) && (sas_hw_at_no_check(kb_flag_3) & LC_E0) )
{
PUT_IN_BUFFER(0x95, 0 );
}
if( code < F1_KEY ) /* is it in char table? */
{
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check(ctl_n_table+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check(ctl_n_table+code - 1) );
}
}
}
}
chr = ( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) ? MC_E0 : 0;
CHECK_AND_PUT_IN_BUFFER(sas_hw_at_no_check(ctl_n_table+code - 1), chr);
}
/* NOT IN CONTROL SHIFT */
if( code <= CAPS_KEY )
{
if( code == PRINT_SCR_KEY )
{
if( ((sas_hw_at_no_check(kb_flag_3) & (KBX + LC_E0)) == (KBX + LC_E0)) ||
( ((sas_hw_at_no_check(kb_flag_3) & KBX) == 0) && (sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT))) )
{
/* print screen */
outb(KEYBA_STATUS_CMD, ENA_KBD);
outb(0x20, 0x20);
FREEKBDHDW(); /* JonLe NTVDM Mod */
exec_sw_interrupt(int05_seg, int05_off);
sas_store_no_check (kb_flag_3, sas_hw_at_no_check(kb_flag_3)& ~(LC_E0 + LC_E1));
exit_from_kbd_int();return;
}
}
else
{
if( ((sas_hw_at_no_check(kb_flag_3) & LC_E0) == 0) || (code != KEY_PAD_SLASH))
{
for( i = 10; i < ALT_TABLE_SIZE; i++ )
if(code == sas_hw_at_no_check(alt_table+i))
break;
/* did we find one */
upper = FALSE;
if( (i < ALT_TABLE_SIZE) && (sas_hw_at_no_check(kb_flag) & CAPS_STATE) )
{
if( (sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT)) == 0 )
upper = TRUE;
}
else
{
if( sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT) )
upper = TRUE;
}
if (upper)
{
/* translate to upper case */
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check(uppercase+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check (uppercase+code - 1) );
}
}
}
}
/* translate to lower case */
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check (lowercase+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check(lowercase+code - 1) );
}
}
/* TEST FOR KEYS F1 - F10 */
/* 7.10.92 MG AND TEST FOR F11 AND F12 !!!!
We were shoving the code for shift-F11 or shift-F12 in if
you pressed unshifted keys. This has been changed so that all the
function keys are handled the same way, which is the correct
procedure.
*/
if( code > F10_KEY && (code != F11_KEY && code != F12_KEY) )
{
if( code > DEL_KEY )
{
if (code == WT_KEY )
{
if ( sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT) )
{
/* translate to upper case */
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check(uppercase+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check(uppercase+code - 1) );
}
}
else
{
/* translate to lower case */
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check(lowercase+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check(lowercase+code - 1) );
}
}
}
else
{
if( (code == 76) && ((sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT)) == 0))
{
PUT_IN_BUFFER( code, 0xf0);
}
/* translate for pseudo scan codes */
chr = ( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) ? MC_E0 : 0;
/* Should this always be upper case ???? */
CHECK_AND_PUT_IN_BUFFER(sas_hw_at_no_check (uppercase+code - 1), chr);
}
}
if (
(code == KEY_PAD_MINUS) ||
(code == KEY_PAD_PLUS) ||
( !(sas_hw_at_no_check(kb_flag_3) & LC_E0) &&
(
((sas_hw_at_no_check(kb_flag) & (NUM_STATE + LEFT_SHIFT + RIGHT_SHIFT)) == NUM_STATE) ||
(((sas_hw_at_no_check(kb_flag) & NUM_STATE) == 0) && (sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT)))
)
)
)
{
/* translate to upper case */
if( sas_hw_at_no_check(kb_flag_3) & LC_E0)
{
CHECK_AND_PUT_IN_BUFFER(MC_E0, sas_hw_at_no_check(uppercase+code - 1) );
}
else
{
CHECK_AND_PUT_IN_BUFFER(code, sas_hw_at_no_check(uppercase+code - 1) );
}
}
}
else
{
if( sas_hw_at_no_check(kb_flag) & (LEFT_SHIFT + RIGHT_SHIFT) )
{
/* translate for pseudo scan codes */
chr = ( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) ? MC_E0 : 0;
CHECK_AND_PUT_IN_BUFFER(sas_hw_at_no_check(uppercase+code - 1), chr);
}
}
if ( code == 76 )
{
PUT_IN_BUFFER(code, 0xf0 );
}
/* translate for pseudo scan codes */
chr = ( sas_hw_at_no_check(kb_flag_3) & LC_E0 ) ? MC_E0 : 0;
CHECK_AND_PUT_IN_BUFFER(sas_hw_at_no_check(lowercase+code - 1), chr);
} /* end of keyboard_int() AT version */
void kb_idle_poll()
{
/*
* this routine is called from bios assembler routines to
* cause an idle poll to occur.
*/
IDLE_poll();
}
#ifdef NTVDM
/*
* Ntvdm has a 16-bit int 16 handler
* it requires a few services for idle
* detection from softpc...
*
*/
void keyboard_io()
{
switch (getAH()) {
/*
* The 16 bit thread has not reached idle status yet
* but it is polling the kbd, so do some brief waits.
*/
case 0:
WaitIfIdle();
#ifndef NTVDM
if (!WaitKbdHdw(0)) {
TryKbdInt();
HostReleaseKbd();
}
#endif /* NTVDM */
break;
/*
* App wants to idle, so consult idle algorithm
*/
case 1:
IDLE_poll();
break;
/*
* App is starting a waitio
*/
case 2:
IDLE_waitio();
break;
/*
* update the keyboard lights,
*/
case 3:
host_kb_light_on (getAL());
break;
}
}
#else
void keyboard_io()
{
/*
* Request to keyboard. The AH register holds the type of request:
*
* AH == 0 Read an character from the queue - wait if no
* character available. Return character in AL
* and the scan code in AH.
*
* AH == 1 Determine if there is a character in the queue.
* Set ZF = 0 if there is a character and return
* it in AX (but leave it in the queue).
*
* AH == 2 Return shift state in AL.
*
* For AH = 0 to 2, the value returned in AH is zero. This correction
* made in r2.69.
*
* NB : The order of reference/increment of buffer_head is critical to
* ensure we do not upset put_in_buffer().
*
*
* XT-SFD BIOS Extended functions:
*
* AH == 5 Place ASCII char/scan code pair (CL / CH)
* into tail of keyboard buffer. Return 0 in
* AL if successful, 1 if buffer already full.
*
* AH == 0x10 Extended read for enhanced keyboard.
*
* AH == 0x11 Extended function 1 for enhanced keyboard.
*
* AH == 0x12 Extended shift status. AL contains kb_flag,
* AH has bits for left/right Alt and Ctrl keys
* from kb_flag_1 and kb_flag_3.
*/
word buffer_head, /* local copy of BIOS data area variable*/
buffer_tail, /* local copy of BIOS data area variable*/
buffer_ptr; /* pointer into BIOS keyboard buffer */
#define INT16H_DEC 0x12 /* AH decremented by this if invalid command */
word CS_save, /* CS before recursive CPU call */
IP_save; /* IP before recursive CPU call */
half_word data, /* byte conyaining typamatic data */
status1, /* temp variables used for storing */
status2; /* status in funtion 0x12 */
INT func_index; /* func_index == AH */
setZF(0);
func_index = (INT)getAH();
note_trace1( BIOS_KB_VERBOSE, "Keyboard BIOS func 0x%x", func_index);
switch (func_index) {
case 0x00: /* Read next char in Kbd buffer */
/*
* The AT emulation of the BIOS uses a recursive CPU to handle
* the HW interrrupts, so there is no need to set the Zero Flag
* and return to our CPU (see original xt version )
*/
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
if (buffer_tail == buffer_head)
{
IDLE_waitio();
setAX(0x9002);
INT15(); /* call int 15h - wait function */
}
do
{
check_indicators(0); /* see if LED's need updating */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
if (buffer_tail == buffer_head)
{
CS_save = getCS();
IP_save = getIP();
/* wait for character in buffer */
do {
IDLE_poll();
setCS(rcpu_poll_segment);
setIP(rcpu_poll_offset);
host_simulate();
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
} while (buffer_tail == buffer_head);
setCS(CS_save);
setIP(IP_save);
}
setAX(sas_w_at_no_check(BIOS_VAR_START + buffer_head));
buffer_head = inc_buffer_ptr(/* from: */buffer_head);
sas_storew_no_check(BIOS_KB_BUFFER_HEAD, buffer_head);
translate_std(); /*translate scan_code pairs */
}
while (getCF()); /* if CF set throw code away and start again */
setIF(1);
IDLE_init();
break;
case 0x01: /* Set ZF to reflect char availability in Kbd buffer */
do
{
check_indicators(1); /* see if LED's need updating */
/* and issue an out 20h,20h */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
setAX(sas_w_at_no_check(BIOS_VAR_START + buffer_head));
if (buffer_tail == buffer_head)
{
/* buffer empty - set flag and return */
IDLE_poll();
setZF(1);
break;
}
else
IDLE_init();
translate_std(); /* translate scan_code pairs, returns CF if throwaway */
if(getCF())
{
/* throw code away by incrementing pointer */
buffer_head = inc_buffer_ptr(/* from: */buffer_head);
sas_storew_no_check(BIOS_KB_BUFFER_HEAD, buffer_head);
}
}
while (getCF()); /* if CF set - start again */
setIF(1);
break;
case 0x02: /* AL := Current Shift Status (really "kb_flag") */
setAH(0);
setAL(sas_hw_at_no_check(kb_flag));
break;
case 0x03: /* Alter typematic rate */
/* check for correct values in registers */
if( (getAL() == 5) && !(getBX() & 0xfce0) )
{
note_trace1(BIOS_KB_VERBOSE, "\talter typematic rate (BX %#x)\n", getBX());
send_data(KB_TYPA_RD);
data = (getBH() << 5) | getBL();
send_data(data);
}
break;
case 0x05: /* Place ASCII + ScanCode in Kbd Buffer */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
/*
* check for sufficient space - if no set AL
*/
buffer_ptr = inc_buffer_ptr(/*from:*/buffer_tail);
if( buffer_head == buffer_ptr )
setAL( 1 );
else {
/*
* load CX into buffer and update buffer_tail
*/
sas_storew_no_check(BIOS_VAR_START + buffer_tail, getCX() );
sas_storew_no_check(BIOS_KB_BUFFER_TAIL, buffer_ptr);
setAL( 0 );
}
setAH( 0 );
setIF(1);
break;
case 0x10: /* Extended ASCII Read */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
if (buffer_tail == buffer_head)
{
IDLE_waitio();
setAX(0x9002);
INT15(); /* call int 15h - wait function */
}
check_indicators(0); /* see if LED's need updating */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
if (buffer_tail == buffer_head)
{
CS_save = getCS();
IP_save = getIP();
/* wait for character in buffer */
while (buffer_tail == buffer_head)
{
IDLE_poll();
setCS(rcpu_poll_segment);
setIP(rcpu_poll_offset);
host_simulate();
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
}
IDLE_init();
setCS(CS_save);
setIP(IP_save);
}
setAX(sas_w_at_no_check(BIOS_VAR_START + buffer_head)); /* Pickup the "current" scancode/char pair */
buffer_head = inc_buffer_ptr(/* from: */buffer_head);
sas_storew_no_check(BIOS_KB_BUFFER_HEAD, buffer_head);
translate_ext(); /* translate scan_code pairs */
setIF(1);
break;
case 0x11: /* Extended ASCII Status */
check_indicators(1); /* see if LED's need updating */
/* and issue an out 20h,20h */
buffer_head = sas_w_at_no_check(BIOS_KB_BUFFER_HEAD);
buffer_tail = sas_w_at_no_check(BIOS_KB_BUFFER_TAIL);
setAX(sas_w_at_no_check(BIOS_VAR_START + buffer_head));
if (buffer_tail == buffer_head) /* No keys pressed */
{
setZF(1);
IDLE_poll();
}
else /* Keystrokes available! */
{
translate_ext(); /* translate scan_code pairs */
IDLE_init();
}
setIF(1);
break;
case 0x12: /* Extended Shift Status */
status1 = sas_hw_at_no_check(kb_flag_1) & SYS_SHIFT; /* only leave SYS KEY */
status1 <<= 5; /* move to bit 7 */
status2 = sas_hw_at_no_check(kb_flag_1) & 0x73; /* remove SYS_SHIFT, HOLD,
STATE and INS_SHIFT */
status1 |= status2; /* merge */
status2 = sas_hw_at_no_check(kb_flag_3) & 0x0C; /* remove LC_E0 & LC_E1 */
status1 |= status2; /* merge */
setAH( status1 );
setAL( sas_hw_at_no_check(kb_flag) );
break;
default:
setAH((func_index - INT16H_DEC));
break;
}
}
#endif
#ifdef SEGMENTATION
/*
* The following #include specifies the code segment into which this
* module will by placed by the MPW C compiler on the Mac II running
* MultiFinder.
*/
#include "SOFTPC_INIT.seg"
#endif
void keyboard_post()
{
/* Set up BIOS keyboard variables */
/* Initialize the keyboard table pointers */
shift_keys = K6;
shift_masks = K7;
ctl_n_table = K8;
ctl_f_table = K9;
lowercase = K10;
uppercase = K11;
alt_table = K30;
sas_storew_no_check(BIOS_KB_BUFFER_HEAD, BIOS_KB_BUFFER);
sas_storew_no_check(BIOS_KB_BUFFER_TAIL, BIOS_KB_BUFFER);
sas_storew_no_check(BIOS_KB_BUFFER_START, BIOS_KB_BUFFER);
sas_storew_no_check(BIOS_KB_BUFFER_END, BIOS_KB_BUFFER + 2*BIOS_KB_BUFFER_SIZE);
/* The following are #defines, referring to locations in BIOS */
/* data area. */
sas_store_no_check (kb_flag,NUM_STATE);
sas_store_no_check (kb_flag_1,0);
sas_store_no_check (kb_flag_2,2);
sas_store_no_check (kb_flag_3,KBX);
sas_store_no_check (alt_input,0);
}
void keyboard_init()
{
/*
** host specific keyboard initialisation
** is now before AT base keyboard initialisation
*/
host_kb_init();
#if defined(CPU_40_STYLE) && !defined (NTVDM)
ica_iret_hook_control(ICA_MASTER, CPU_KB_INT, TRUE);
#endif
}
#ifdef NTVDM
/*:::::::::::::::::::::::::::::::::::::::::::::::: Map in new keyboard tables */
/*::::::::::::::::::::::::::::::::::::::::::::::::::::: Set interrupt vectors */
/*
** The Microsoft NTIO.SYS calls this func via BOP 5F to pass
** interesting addresses to our C BIOS.
*/
#if defined(MONITOR)
IMPORT UTINY getNtScreenState IPT0();
#endif
void kb_setup_vectors(void)
{
word KbdSeg, w;
word *pkio_table;
double_word phy_base;
KbdSeg = getDS();
pkio_table = (word *) effective_addr(getCS(), getSI());
/* IDLE variables */
sas_loadw((sys_addr)(pkio_table + 12), &w);
pICounter = (word *) (Start_of_M_area + ((KbdSeg<<4)+w));
pCharPollsPerTick = (word *) (Start_of_M_area + ((KbdSeg<<4)+w+4));
pMinConsecutiveTicks = (word *) (Start_of_M_area + ((KbdSeg<<4)+w+8));
#if defined(MONITOR)
phy_base = (double_word)KbdSeg << 4;
/* key tables */
shift_keys = phy_base + *pkio_table++;
shift_masks = phy_base + *pkio_table++;
ctl_n_table = phy_base + *pkio_table++;
ctl_f_table = phy_base + *pkio_table++;
lowercase = phy_base + *pkio_table++;
uppercase = phy_base + *pkio_table++;
alt_table = phy_base + *pkio_table++;
dummy_int_seg = KbdSeg; /* dummy int, iret routine */
dummy_int_off = *pkio_table++;
int05_seg = KbdSeg; /* print screen caller */
int05_off = *pkio_table++;
int15_seg = KbdSeg; /* int 15 caller */
int15_off = *pkio_table++;
rcpu_nop_segment = KbdSeg; /* cpu nop */
rcpu_nop_offset = *pkio_table++;
sp_int15_handler_seg = KbdSeg; /* int 15 handler */
sp_int15_handler_off = *pkio_table++;
pkio_table++; /* iDle variables, done above */
rcpu_int4A_seg = KbdSeg;
rcpu_int4A_off = *pkio_table++; /* real time clock */
int1b_seg = KbdSeg; /* kbd break handler */
int1b_off = *pkio_table++;
int10_seg = KbdSeg;
int10_caller = *pkio_table++;
int10_vector = *pkio_table++;
/*
** Address of data in keyboard.sys, Tim August 92.
**
** useHostInt10 is a one byte variable. 1 means use host video BIOS,
** (ie. full-screen), 0 means use SoftPC video BIOS (ie. windowed).
** babyModeTable is a mini version of the table in ROM that contains
** all the VGA register values for all the modes. The keyboard.sys
** version only has two entries; for 40 column text mode and 80
** column text mode.
*/
useHostInt10 = *pkio_table++;
sas_store_no_check((sys_addr)(phy_base + useHostInt10), getNtScreenState());
babyModeTable = (int10_seg << 4) + *pkio_table++;
changing_mode_flag = *pkio_table++; /* indicates trying to change vid mode*/
/* Initialise printer status table. */
printer_setup_table(effective_addr(KbdSeg, *pkio_table++));
wait_int_off = *pkio_table++;
wait_int_seg = KbdSeg;
dr_type_seg = KbdSeg;
dr_type_off = *pkio_table++;
dr_type_addr = (sys_addr)dr_type_seg * 16L + (sys_addr)dr_type_off;
vga1b_seg = KbdSeg;
vga1b_off = *pkio_table++; /* VGA capability table (normally lives in ROM) */
conf_15_seg = KbdSeg;
conf_15_off = *pkio_table++; /* INT15 config table (normally in ROM) */
TimerInt08Seg = KbdSeg;
TimerInt08Off = *pkio_table++;
int13h_vector_seg = KbdSeg;
int13h_caller_seg = KbdSeg;
int13h_vector_off = *pkio_table++;
int13h_caller_off = *pkio_table++;
stream_io_buffer_size = *pkio_table++;
stream_io_buffer = (half_word *)effective_addr(*pkio_table++, 0);
stream_io_dirty_count_ptr = (word *)effective_addr(KbdSeg, *pkio_table++);
stream_io_bios_busy_sysaddr = effective_addr(KbdSeg, *pkio_table++);
#ifndef PROD
if (*pkio_table != getAX()) {
always_trace0("ERROR: KbdVectorTable!");
}
#endif
TimerInt1CSeg = KbdSeg;
TimerInt1COff = dummy_int_off;
#else /* ndef MONITOR */
/* kbd bios callout optimization */
sas_loadw(0x15*4, &sp_int15_handler_off);
sas_loadw(0x15*4 + 2, &sp_int15_handler_seg);
/* timer hardware interrupt optimizations */
sas_loadw(0x08*4, &TimerInt08Off);
sas_loadw(0x08*4 + 2, &TimerInt08Seg);
sas_loadw(0x1C*4, &TimerInt1COff);
sas_loadw(0x1C*4 + 2, &TimerInt1CSeg);
sas_loadw(0x13 * 4, &int13h_vector_off);
sas_loadw(0x13 * 4 + 2, &int13h_vector_seg);
int13h_caller_seg = KbdSeg;
dr_type_seg = KbdSeg;
sas_loadw((sys_addr)(pkio_table + 27), &int13h_caller_off);
sas_loadw((sys_addr)(pkio_table + 22), &dr_type_off);
dr_type_addr = effective_addr(dr_type_seg, dr_type_off);
#endif /* MONITOR */
sas_loadw(0x09*4, &KbdInt09Off);
sas_loadw(0x09*4 + 2, &KbdInt09Seg);
ResumeTimerThread();
}
/*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Int15 caller */
/*
* Gives chance for other parts of NTVDM to
* update the kbd i15 kbd callout optimization
*/
void UpdateKbdInt15(word Seg,word Off)
{
word int15Off, int15Seg;
/* make sure nobody has hooked since the last time */
/* we stored the i15 vector */
sas_loadw(0x15*4 , &int15Off);
sas_loadw(0x15*4 + 2, &int15Seg);
if(int15Off != sp_int15_handler_off || int15Seg != sp_int15_handler_seg)
{
#ifndef PROD
printf("NTVDM: UpdateKbdInt15 Nuking I15 offsets\n");
#endif
sp_int15_handler_off = sp_int15_handler_seg = 0;
return;
}
sp_int15_handler_off = Off;
sp_int15_handler_seg = Seg;
}
IMPORT void (*BIOS[])();
void INT15(void)
{
ULONG ul;
word CS_save, IP_save;
word int15Off, int15Seg;
/*:::::::::::::::::::::::::::::::::: Get location of current 15h handler */
sas_loadw(0x15*4 , &int15Off);
sas_loadw(0x15*4 + 2, &int15Seg);
/*:::::::::::::::::::::: Does the 15h vector point to the softpc handler */
ul = (ULONG)getAH();
if((ul == 0x4f || ul == 0x91) &&
int15Off == sp_int15_handler_off &&
int15Seg == sp_int15_handler_seg)
{
(BIOS[0x15])(); /* Call int15 handler defined in base */
}
else
{
/*::::::::::::::::::::::::::::::::::::::::::::::: Call int15 handler */
ul = (ULONG)bBiosOwnsKbdHdw;
if (bBiosOwnsKbdHdw) {
bBiosOwnsKbdHdw = FALSE;
HostReleaseKbd();
}
CS_save = getCS(); /* Save current CS,IP settings */
IP_save = getIP();
setCS(int15_seg);
setIP(int15_off);
host_simulate(); /* Call int15 handler */
setCS(CS_save); /* Restore CS,IP */
setIP(IP_save);
if (ul)
bBiosOwnsKbdHdw = !WaitKbdHdw(5000);
}
}
/*
* 32 bit services for kb16.com, the international 16 bit
* interrupt 9 service handler.
*
*/
void Keyb16Request(half_word BopFnCode)
{
/*
* upon entry to kb16, take ownership of kbd
* disable the kbd
* disable interrupts
*/
if (BopFnCode == 1) {
bBiosOwnsKbdHdw = !WaitKbdHdw(5000);
outb(KEYBA_STATUS_CMD, DIS_KBD);
setIF(1);
}
/* K26A type exit from i9 handler */
else if (BopFnCode == 2) {
if (getBH()) { /* bl == do beep */
host_alarm(250000L);
}
outb(0x20, 0x20); /* eoi */
if (getBL()) { /* got character ? do device post */
setAX(0x9102);
INT15();
}
outb(KEYBA_STATUS_CMD, ENA_KBD);
if (bBiosOwnsKbdHdw) {
bBiosOwnsKbdHdw = FALSE;
HostReleaseKbd();
}
}
/* K27A exit notify */
else if (BopFnCode == 3) {
outb(0x20, 0x20);
outb(KEYBA_STATUS_CMD, ENA_KBD);
if (bBiosOwnsKbdHdw) {
bBiosOwnsKbdHdw = FALSE;
HostReleaseKbd();
}
}
/* K27A exit notify */
else if (BopFnCode == 4) {
outb(KEYBA_STATUS_CMD, ENA_KBD);
if (bBiosOwnsKbdHdw) {
bBiosOwnsKbdHdw = FALSE;
HostReleaseKbd();
}
}
}
#endif /* NTVDM */
