home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
HAM Radio 3
/
hamradioversion3.0examsandprograms1992.iso
/
packet
/
n17jsrc
/
asyvec.asm
< prev
next >
Wrap
Assembly Source File
|
1991-02-01
|
3KB
|
158 lines
; ASY (8250/16450/16550A "comm" port) interrupt hooks
; Copyright 1991 Phil Karn, KA9Q
.MODEL MEMMOD,C
%MACS
extrn doret:proc,asyint:far,eoi:proc
.DATA
extrn Sssave:word
extrn Spsave:word
extrn Stktop
.CODE
dbase dw @Data
; asy0vec - asynch channel 0 interrupt handler
public asy0vec
label asy0vec far
push ds ; save on user stack
mov ds,cs:dbase ; establish interrupt data segment
mov Sssave,ss ; stash user stack context
mov Spsave,sp
mov ss,cs:dbase
lea sp,Stktop
push ax ; save user regs on interrupt stack
push bx
push cx
push dx
push bp
push si
push di
push es
call eoi
mov ax,0 ; arg for service routine
push ax
call asyint
pop ax
jmp doret
; asy1vec - asynch channel 1 interrupt handler
public asy1vec
label asy1vec far
push ds ; save on user stack
mov ds,cs:dbase ; establish interrupt data segment
mov Sssave,ss ; stash user stack context
mov Spsave,sp
mov ss,cs:dbase
lea sp,Stktop
push ax ; save user regs on interrupt stack
push bx
push cx
push dx
push bp
push si
push di
push es
call eoi
mov ax,1 ; arg for service routine
push ax
call asyint
pop ax
jmp doret
; asy2vec - asynch channel 2 interrupt handler
public asy2vec
label asy2vec far
push ds ; save on user stack
mov ds,cs:dbase ; establish interrupt data segment
mov Sssave,ss ; stash user stack context
mov Spsave,sp
mov ss,cs:dbase
lea sp,Stktop
push ax ; save user regs on interrupt stack
push bx
push cx
push dx
push bp
push si
push di
push es
call eoi
mov ax,2 ; arg for service routine
push ax
call asyint
pop ax
jmp doret
; asy3vec - asynch channel 3 interrupt handler
public asy3vec
label asy3vec far
push ds ; save on user stack
mov ds,cs:dbase ; establish interrupt data segment
mov Sssave,ss ; stash user stack context
mov Spsave,sp
mov ss,cs:dbase
lea sp,Stktop
push ax ; save user regs on interrupt stack
push bx
push cx
push dx
push bp
push si
push di
push es
call eoi
mov ax,3 ; arg for service routine
push ax
call asyint
pop ax
jmp doret
; asy4vec - asynch channel 4 interrupt handler
public asy4vec
label asy4vec far
push ds ; save on user stack
mov ds,cs:dbase ; establish interrupt data segment
mov Sssave,ss ; stash user stack context
mov Spsave,sp
mov ss,cs:dbase
lea sp,Stktop
push ax ; save user regs on interrupt stack
push bx
push cx
push dx
push bp
push si
push di
push es
call eoi
mov ax,4 ; arg for service routine
push ax
call asyint
pop ax
jmp doret
end