modex 320x240

gistfile1.asm

tweak_320x240:
    ; --------------------------
    ; 320x240
    ;
    ; pages = 3
    ; line size = 80
    ; page size = 76800
    ; --------------------------

    outp 03d4h, 11h

    mov dx, 03d5h
    in  al, dx
    and al, 7fh
    mov bl, al

    outp 03d4h, 11h
    outp 03d5h, bl

    outp 03c2h, 0e3h
    outp 03d4h, 000h
    outp 03d5h, 05fh
    outp 03d4h, 001h
    outp 03d5h, 04fh
    outp 03d4h, 002h
    outp 03d5h, 050h
    outp 03d4h, 003h
    outp 03d5h, 082h
    outp 03d4h, 004h
    outp 03d5h, 054h
    outp 03d4h, 005h
    outp 03d5h, 080h
    outp 03d4h, 006h
    outp 03d5h, 00dh
    outp 03d4h, 007h
    outp 03d5h, 03eh
    outp 03d4h, 008h
    outp 03d5h, 000h
    outp 03d4h, 009h
    outp 03d5h, 041h
    outp 03d4h, 010h
    outp 03d5h, 0eah
    outp 03d4h, 011h
    outp 03d5h, 0ach
    outp 03d4h, 012h
    outp 03d5h, 0dfh
    outp 03d4h, 013h
    outp 03d5h, 028h
    outp 03d4h, 014h
    outp 03d5h, 000h
    outp 03d4h, 015h
    outp 03d5h, 0e7h
    outp 03d4h, 016h
    outp 03d5h, 006h
    outp 03d4h, 017h
    outp 03d5h, 0e3h
    outp 03c4h, 001h
    outp 03c5h, 001h
    outp 03c4h, 004h
    outp 03c5h, 006h
    outp 03ceh, 005h
    outp 03cfh, 040h
    outp 03ceh, 006h
    outp 03cfh, 005h

    mov dx, 03dah
    in  al, dx
	
    outp 03c0h, 010h or 020h
    outp 03c0h, 041h

    mov dx, 03dah
    in  al, dx
	
    outp 03c0h, 013h or 020h
    outp 03c0h, 0

    outp 03d4h, 011h

    mov dx, 03d5h
    in  al, dx
    or  al, 80h
    mov bl, al

    outp 03d4h, 11h
    outp 03d5h, bl

    ret