;
; COMSET.A86  Version 0.1 - Forces BIOS Recognition Of COM Ports 3 And 4.
; Freeware by David Macchia
; Ported to CP/M-86 from MS-DOS by Kirk Lawrence
;
        cseg
        org     100h
        jmp     start
;
msg     db      10,13,'COMSET Version 0.1 - Force BIOS Recognition Of COM Ports 3 And 4'
        db      10,13,'Freeware from David Macchia.  CP/M-86 version by Kirk Lawrence.',10,13
        db      10,13,'Í COM3 and COM4 are now installed.',10,13,'$'
;
start:
        mov     cl,9
        mov     dx,offset msg
        int     224
        mov     dx,0040h
        mov     ds,dx
        mov     dx,03E8h
        mov     bx,0004h
        mov     [bx],dx
        mov     dx,02E8h
        mov     bx,0006h
        mov     [bx],dx
        mov     bx,0011h
        mov     dx,[bx]
        and     dx,0FFF0h
        or      dx,0008h
        mov     [bx],dx
        xor     cx,cx
        int     224
end