242 lines
4.4 KiB
NASM
242 lines
4.4 KiB
NASM
% MODEL MEM_MOD
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PUBLIC _fos_setbps
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PUBLIC _fos_init
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PUBLIC _fos_deinit
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PUBLIC _fos_purgeoutput
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PUBLIC _fos_purgeinput
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PUBLIC _fos_status
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PUBLIC _fos_setdtr
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PUBLIC _fos_send
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PUBLIC _fos_sendnw
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PUBLIC _fos_flowctl
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PUBLIC _fos_getch
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PUBLIC _fos_getchnw
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PUBLIC _fos_break
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PUBLIC _fos_sendblock
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PUBLIC _fos_readblock
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CODESEG
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nofossil_err DB 'FOSSIL driver not installed!',13,10,'$'
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EVEN
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PROC _fos_setbps
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arg port:WORD,baud:BYTE
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push bp
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mov bp,sp
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mov ah,0
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mov al,[baud]
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mov dx,[port]
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int 14h
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pop bp
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ret
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ENDP _fos_setbps
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PROC _fos_status
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,3
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int 14h
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pop bp
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ret
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ENDP _fos_status
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PROC _fos_init
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,4
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int 14h
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cmp ax,1954h
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je foss_ok
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push cs
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pop ds
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mov dx,offset nofossil_err
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mov ah,9
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int 21h
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mov ax,4cffh
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int 21h
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foss_ok: pop bp
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ret
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ENDP _fos_init
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PROC _fos_deinit
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,5
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int 14h
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pop bp
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ret
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ENDP _fos_deinit
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PROC _fos_setdtr
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arg port:WORD,state:BYTE
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push bp
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mov bp,sp
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mov dx,[port]
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mov al,[state]
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mov ah,6
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int 14h
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pop bp
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ret
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ENDP _fos_setdtr
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PROC _fos_purgeoutput
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,9
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int 14h
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pop bp
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ret
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ENDP _fos_purgeoutput
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PROC _fos_purgeinput
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,0Ah
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int 14h
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pop bp
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ret
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ENDP _fos_purgeinput
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PROC _fos_sendnw
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arg port:WORD,char:BYTE
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push bp
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mov bp,sp
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mov dx,[port]
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mov al,[char]
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mov ah,0Bh
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int 14h
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pop bp
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ret
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ENDP _fos_sendnw
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PROC _fos_send
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arg port:WORD,char:BYTE
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push bp
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mov bp,sp
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mov dx,[port]
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mov al,[char]
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mov ah,1
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int 14h
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pop bp
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ret
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ENDP _fos_send
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PROC _fos_flowctl
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arg port:WORD,ctl:BYTE
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push bp
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mov bp,sp
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mov dx,[port]
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mov al,[ctl]
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mov ah,0Fh
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int 14h
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pop bp
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ret
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ENDP _fos_flowctl
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PROC _fos_getchnw
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ax,0c00h
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int 14h
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cmp ax,0FFFFh
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je @@exit
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mov dx,[port]
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mov ax,200h
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int 14h
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xor ah,ah
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@@exit: pop bp
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ret
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ENDP _fos_getchnw
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PROC _fos_getch
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arg port:WORD
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push bp
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mov bp,sp
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mov dx,[port]
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mov ax,200h
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int 14h
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xor ah,ah
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pop bp
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ret
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ENDP _fos_getch
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PROC _fos_sendblock
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arg port:WORD,block:PTR,numbytes:WORD
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push bp
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mov bp,sp
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push di
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mov dx,[port]
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mov cx,[numbytes]
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if @DataSize
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les di,[block]
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else
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push ds
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pop es
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mov di,[block]
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endif
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mov ah,19h
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int 14h
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pop di
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pop bp
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ret
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ENDP _fos_sendblock
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PROC _fos_readblock
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arg port:WORD,block:PTR,numbytes:WORD
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push bp
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mov bp,sp
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push di
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mov dx,[port]
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mov cx,[numbytes]
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if @DataSize
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les di,[block]
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else
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push ds
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pop es
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mov di,[block]
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endif
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mov ah,18h
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int 14h
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pop di
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pop bp
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ret
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ENDP _fos_readblock
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PROC _fos_break
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arg port:WORD, mode:BYTE
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push bp
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mov bp,sp
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mov dx,[port]
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mov ah,1ah
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cmp [mode],0
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je @@stop
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mov al,1
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jmp @@exit
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@@stop: xor al,al
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@@exit: int 14h
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pop bp
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ret
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ENDP _fos_break
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ENDS
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END
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