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/ Technotools / Technotools (Chestnut CD-ROM)(1993).ISO / lang_asm / seeports / seeports.asm next >

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Assembly Source File | 1990-03-31 | 6KB | 492 lines

cseg segment assume cs:cseg,ds:cseg org 100h start: jmp initialize old_keyboard_io dd 0,0 assume ds:nothing new_keyboard_io proc far sti cmp ah,0 je ksread jmp old_keyboard_io ksread: call keyread iret new_keyboard_io endp keyread proc near push si readchar: pushf call old_keyboard_io cmp al,0 je extended jmp readdone extended: mov si,offset keytab nextext: cmp byte ptr cs:[si],0 je readdone cmp ah,cs:[si] je startexpand add si,3 jmp nextext startexpand: add si,1 cmp word ptr cs:[si],0 je readdone push ax push bx push cx push dx push si push di push bp push ds and ah,1 add ah,ah mov bl,ah mov bh,04 mov ax,0000 mov ds,ax cmp word ptr [bx],0 je skip mov bl,49h mov ax,0b800h cmp byte ptr [bx],7 jne other1 mov ax,0b000h other1: mov cs:vaddr,ax call word ptr cs:[si] skip: pop ds pop bp pop di pop si pop dx pop cx pop bx pop ax readdone: pop si ret keyread endp keytab db 120 ; alt-1 dw port1status db 121 ; alt-2 dw port2status db 0 dw 0 toggle db 0 assume cs:cseg,ds:cseg port1status proc near mov bx,cs mov ds,bx mov dh,3 call portstatus ret port1status endp port2status proc near mov bx,cs mov ds,bx mov dh,2 call portstatus ret port2status endp portstatus proc near push bx call getpos push bx mov bx,0 call setpos doshow: cmp toggle,dh ; same as last hot key? jne newinfo ; no then skip call restore98 ; else try to restore your data jnz newinfo ; unless screen has scrolled. mov toggle,0 ; if restored, just clear hot-key toggle jmp bye newinfo: call save98 ; captures if its your data mov toggle,dh call showcom call showbaud call showlen call showstop call showparity bye: pop bx call setpos pop bx ret portstatus endp pad db 98 dup(32) signat db ' bits/char, ' save98 proc near push ax push bx push es push di mov ax,vaddr mov es,ax mov di,36 mov bx,0 qchk: mov ah,es:[di] cmp ah,signat[bx] jne sok inc di inc di inc bx cmp bx,12 jne qchk jmp sdone sok: mov di,0 mov bx,0 sloop: mov ah,es:[di] mov pad[bx],ah inc bx inc di cmp bx,98 ; 98 bytes yet? jne sloop sdone: pop di pop es pop bx pop ax ret save98 endp restore98 proc near push ax push bx push es push di mov ax,vaddr mov es,ax mov di,36 mov bx,0 sigchk: mov ah,es:[di] cmp ah,signat[bx] jne rdone inc di inc di inc bx cmp bx,12 jne sigchk mov di,0 mov bx,0 rloop: mov ah,pad[bx] mov es:[di],ah inc bx inc di cmp bx,98 ; 98 bytes yet? jne rloop rdone: pop di pop es pop bx pop ax ret restore98 endp dec cx com1 db 'COM1: ',0 com2 db 'COM2: ',0 comtab dw com1 dw com2 dw 0 showcom proc near push bx push dx push si mov bh,0 mov bl,3 sub bl,dh shl bx,1 mov si,comtab[bx] call dstring pop si pop dx pop bx ret showcom endp vaddr dw 0000h b110 db ' 110 baud, ',0 b300 db ' 300 baud, ',0 b1200 db '1200 baud, ',0 b2400 db '2400 baud, ',0 b4800 db '4800 baud, ',0 b9600 db '9600 baud, ',0 divtab dw 1047 dw 384 dw 96 dw 48 dw 24 dw 12 dw 0 baudtab dw b110 dw b300 dw b1200 dw b2400 dw b4800 dw b9600 dw 0 showbaud proc near push di push si push bx call getbaud mov di,0 baudloop: cmp divtab[di],0 je bldone cmp bx,divtab[di] je dbaud add di,2 jmp baudloop dbaud: mov si,baudtab[di] call dstring bldone: pop bx pop si pop di ret showbaud endp getbaud proc near push ax push dx mov dl,0fbh in al,dx push ax or al,80h out dx,al mov dl,0f8h in al,dx mov bl,al mov dl,0f9h in al,dx mov bh,al pop ax mov dl,0fbh out dx,al pop dx pop ax ret getbaud endp char7 db '7 bits/char, ',0 char8 db '8 bits/char, ',0 chartab dw char7 dw char8 dw 0 showlen proc near push ax push bx push si call getlen shl bx,1 mov si,chartab[bx] call dstring pop si pop bx pop ax ret showlen endp getlen proc near push ax push dx mov dl,0fbh in al,dx and al,03h mov bh,0 mov bl,al sub bx,2 pop dx pop ax ret getlen endp stop1 db '1 stop, ',0 stop2 db '2 stop, ',0 stoptab dw stop1 dw stop2 dw 0 showstop proc near push bx push si call getstop dec bx shl bx,1 mov si,stoptab[bx] call dstring pop si pop bx ret showstop endp getstop proc near push ax push dx mov bx,1 mov dl,0fbh in al,dx and al,04h cmp al,0 je gsdone inc bx gsdone: pop dx pop ax ret getstop endp pnone db 'no parity ',0 podd db 'odd parity ',0 peven db 'even parity',0 partab dw pnone dw podd dw peven dw 0 showparity proc near push bx push si call getparity shl bx,1 mov si,partab[bx] call dstring pop si pop bx ret showparity endp getparity proc near push ax push cx push dx mov bx,0 mov dl,0fbh in al,dx and al,18h cmp al,00h je gpdone cmp al,10h je gpdone inc bx cmp al,18h jne gpdone inc bx gpdone: pop dx pop cx pop ax ret getparity endp getpos proc near push ax push cx push dx mov ah,03h mov bh,0 int 10h mov bx,dx pop dx pop cx pop ax ret getpos endp setpos proc near push ax push bx push dx mov ah,02h mov dx,bx mov bh,0 int 10h pop dx pop bx pop ax ret setpos endp dstring proc near push si push ax cmp si,0 je dsdone dloop: mov al,[si] cmp al,0 je dsdone call dchar inc si jmp dloop dsdone: pop ax pop si ret dstring endp dchar proc near push ax push bx mov bh,1 mov ah,0eh int 10h pop bx pop ax ret dchar endp ; CODE BEGINS initialize: assume cs:cseg,ds:cseg mov bx,cs mov ds,bx mov al,16h mov ah,35h int 21h mov word ptr cs:old_keyboard_io,bx mov word ptr cs:old_keyboard_io[2],es mov dx,offset cs:new_keyboard_io mov al,16h mov ah,25h int 21h mov dx,offset initialize int 27h cseg ends end start