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|
;
;
; Serial driver for COM1 to be used by Sim16 layer.
;
;
CharDev EQU 8000h
StatusError EQU 8000h
StatusBusy EQU 0200h
StatusDone EQU 0100h
ErrorGenF EQU 12
;
; PIC Addresses
;
PIC EQU 20h
PIC_IntEnable EQU 21h
EOI EQU 20h
;
; UART Port Addresses
;
SERIALPORT EQU 3F8h ; default serial port to be used, change this
; to 2F8h if you want to use COM2.
RxBuf EQU 0F8h ; base address
Baud1 EQU RxBuf+1 ; baud divisor high byte
IER EQU RxBuf+1 ; int. enable register
IIR EQU RxBuf+2 ; int. identification register
LCR EQU RxBuf+3 ;
MCR EQU RxBuf+4 ;
LSR EQU RxBuf+5 ;
MSR EQU RxBuf+6 ;
; UART Interrupt Identification Register Equates
IntPending EQU 00000001b ; interrupt is pending
; UART Line Control Register Equates
DLAB EQU 10000000b ; divisor latch access bit
SetBrk EQU 01000000b ; send break control bit
StkParity EQU 00100000b ; stick parity control bit
EvenParity EQU 00010000b ; even parity bit
GenParity EQU 00001000b ; generate parity bit
XStopBit EQU 00000100b ; extra stop bit
WordLen8 EQU 00000011b ; word len = 8
WordLen7 EQU 00000010b ; word len = 7
WordLen6 EQU 00000001b ; word len = 6
; UART Line Status Register Equates
TransShReg EQU 01000000b ; tranmit shift register empty
TransHReg EQU 00100000b ; transmit holding register empty
BrkRcv EQU 00010000b ; break received
FrameErr EQU 00001000b ; framing error
ParityErr EQU 00000100b ; parity error
OverRunErr EQU 00000010b ; overrun error
RcvData EQU 00000001b ; received data ready
RcvError EQU BrkRcv+FrameErr+ParityErr+OverRunErr
; UART Modem Control Register Equates
OUT1 EQU 00000100b ;
OUT2 EQU 00001000b ; allow 8250 ints in
SetRTS EQU 00000010b ; set RTS
SetDTR EQU 00000001b ; set DTR
; UART Modem Status Register Equates
CD EQU 10000000b ; carrier detect
RI EQU 01000000b ; ring indicator
DSR EQU 00100000b ; data set ready
CTS EQU 00010000b ; CTS
CDC EQU 00001000b ; carrier dectect change
RIC EQU 00000100b ; ring indicator change
DSRC EQU 00000010b ; DSR change
CTSC EQU 00000001b ; CTS change
; UART Interrupt Enable Register Equates
RxInt EQU 00000001b ; receive interrupt
TxInt EQU 00000010b ; transmit interrupt
LSInt EQU 00000100b ; line status interrupt
MSInt EQU 00001000b ; modem status interrupt
AllInt EQU RxInt+LSInt+MSInt
CR EQU 0dh
LF EQU 0ah
EOM EQU '$'
INT21 = 21h
DISPLAY_FUNCTION = 9h
DOS_OPEN = 3Dh
DOS_CLOSE = 3Eh
DOS_DONE = 0100h
DOS_SUCCESS = 0h
DOS_ERROR = 8000h
DOS_GENFAIL = 0Ch
EXPR_TYPE_SEG equ 0001b ; address type segment:offset
OPEN_FLAG = 40h
InitLCR EQU 03h ; initial LCR settings
InitMCR EQU OUT2+SetRTS+SetDTR ; initial MCR settings
BaudRate EQU 12 ; set it to 9600 BPS
SOH EQU 1 ; start of header
EOT EQU 4 ; end of transmission
ToWOW32 EQU 1
GETMEM EQU 2
SETMEM EQU 3
WAKEUP EQU 4
RESP EQU 5
ACK EQU 6
NAK EQU 7
PSZ EQU 8
MAXCOUNT EQU 10
Packet1 STRUC
Start DB ?
Command DB ?
Len DW ?
ToWOW32_OFF DW ?
ToWOW32_SEL DW ?
Packet1 ENDS
Packet2 STRUC
DD ?
MEM_OFF DW ?
MEM_SEL DW ?
MEM_LENGTH DW ?
DataM DB ?
Packet2 ENDS
junk1 STRUC
_off DW ?
_sel DW ?
junk1 ENDS
|
