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include incs.inc
extrn LocalInit:FAR
extrn __acrtused:abs ; pull in windows startup code
MAIN_DATA SEGMENT
extrn RespPkt:BYTE
extrn ToWOW32Pkt:BYTE
extrn WAKEUPPkt:BYTE
extrn ACKPkt:BYTE
extrn NAKPkt:BYTE
extrn GetMemPkt:BYTE
extrn SetMemPkt:BYTE
MAIN_DATA ENDS
MAIN_CODE SEGMENT
ASSUME CS:MAIN_CODE, DS:MAIN_DATA
extrn COMISR:NEAR
;*****************************************************************************
;
; LibEntry, called when DLL is loaded
;
;*****************************************************************************
PUBLIC LibEntry
LibEntry PROC FAR
int 3
jcxz LibEntry_Initialize
push ds ; heap segment
xor ax, ax ;
push ax
push cx ; heap size
call LocalInit ; initialize heap
or ax, ax
jz LibEntry_Fail
LibEntry_Initialize:
call Initialize ; initialize com port and buffers
LibEntry_Fail:
ret
LibEntry ENDP
;*****************************************************************************
;
; Initialize com port and memory
;
;*****************************************************************************
PUBLIC Initialize
Initialize PROC NEAR
call Init_Com ; initialize com port
or ax, ax
jz Initialize_Fail
push ax
call Init_Mem ; initialize memory
pop ax
ret
Initialize_Fail:
int 3
ret
Initialize ENDP
;*****************************************************************************
;
; WEP, called when DLL is unloaded
;
;*****************************************************************************
PUBLIC WEP
WEP PROC FAR
nop
ret
WEP ENDP
;*****************************************************************************
;
; Initialization of the Port
;
;*****************************************************************************
Init_Com PROC NEAR
mov dx, SERIALPORT
mov dl, LCR
mov al, DLAB ; turn on divisor latch
out dx, al
DELAY
mov dl, RxBuf
mov ax, BaudRate ; set baud rate
out dx, al
DELAY
inc dx
mov al, ah
out dx, al
DELAY
mov dl, LCR ; set LCR
mov al, InitLCR
out dx, al
DELAY
mov dl, IER ; turn on interrupts on 8250
mov al, AllInt
out dx, al
DELAY
mov dl, MCR ; set MCR
mov al, InitMCR
out dx, al
Init_ClearRegisters:
mov dl, LSR
in al, dx
mov dl, RxBuf
in al, dx
mov dl, MSR
in al, dx
mov dl, IIR
in al, dx
in al, dx
test al, 1
jz Init_ClearRegisters
;
; install interrupt handler
;
cli
mov al, 0Ch
push ds
mov dx, SEG MAIN_CODE
mov ds, dx
mov dx, OFFSET COMISR
mov ah, 25h
int 21h
pop ds
in al, PIC_IntEnable
and al, 0E7h
DELAY
out PIC_IntEnable, al
sti
mov al, EOI
out PIC, al
mov ax, 1 ; return sucess !
ret
Init_Com ENDP
;*****************************************************************************
;
; Initialize memory ie, allocate buffers and packets
;
;*****************************************************************************
PUBLIC Init_Mem
Init_Mem PROC NEAR
mov bx, OFFSET RespPkt
mov [bx].Start, SOH ; start of header
mov [bx].Command, RESP ; Resp packet
mov bx, OFFSET ToWOW32Pkt ; ToWOW32 packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, ToWOW32 ; ToWOW32 packet
mov [bx].Len, 9 ; length of entire packet
mov BYTE PTR [bx+8], EOT ; end of transmission
mov bx, OFFSET WAKEUPPkt ; WAKEUP packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, WAKEUP ; WAKEUP packet
mov [bx].Len, 9 ; length of entire packet
mov BYTE PTR [bx+8], EOT ; end of transmission
mov bx, OFFSET ACKPkt ; ACK packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, ACK ; ACK packet
mov [bx].Len, 5 ; length of entire packet
mov BYTE PTR [bx+4], EOT ; end of transmission
mov bx, OFFSET NAKPkt ; NAK packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, NAK ; NAK packet
mov [bx].Len, 5 ; length of entire packet
mov BYTE PTR [bx+4], EOT ; end of transmission
mov bx, OFFSET GetMemPkt ; GetMem packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, GETMEM ; GETMEN packet
mov [bx].Len, 11 ; length of entire packet
mov BYTE PTR [bx+10], EOT ; end of transmission
mov bx, OFFSET SetMemPkt ; SetMem packet
mov [bx].Start, SOH ; start of header
mov [bx].Command, SETMEM ; SETMEM packet
mov [bx].Len, 11 ; length of entire packet
mov BYTE PTR [bx+10], EOT ; end of transmission
ret
Init_Mem ENDP
MAIN_CODE ENDS
END LibEntry
|
