INT 10 - Cirrus Logic BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - GET USER OPTIONS AH = 12h BL = 9Ah Return: AX = options word 1 (see #00031) CX = options word 2 (see #00032) BX,DX reserved SeeAlso: AH=12h/BL=80h,AH=12h/BL=84h,AH=12h/BL=93h,AH=12h/BL=A0h SeeAlso: AH=12h/BL=A3h,AH=12h/BL=A4h,#00732 at INT 1A/AX=B102h Bitfields for Cirrus Logic options word 1: Bit(s) Description (Table 00031) 0,1 reserved 2-4 monitor type 5-6 maximum vertical resolution 7-9 reserved 10 force 8-bit operation 11-13 reserved 14 vertical refresh frequency at 640x480 =0 60 Hz =1 high refresh 15 reserved SeeAlso: AH=12h/BL=AEh Bitfields for Cirrus Logic options word 2: Bit(s) Description (Table 00032) 15-13 vertical refresh frequency at 1024x768 12-11 vertical refresh frequency at 800x600 10-6 reserved 5-4 vertical refresh frequency at 1280x1024 3-0 reserved SeeAlso: #00033 Bitfields for Cirrus Logic Options word 2 (alternate???): Bit(s) Description (Table 00033) 15-12 vertical refresh frequency at 1024x768 0000 43i Hz 0001 60 Hz 0010 70 Hz 0011 72 Hz 0100 76 Hz other reserved 11-8 vertical refresh frequency at 800x600 0000 56 Hz 0001 60 Hz 0010 72 Hz 0011 75 Hz other reserved 7-4 maximum vertical resolution 0000 480 scanlines 0001 600 scanlines 0010 768 scanlines 0011 1024 scanlines other reserved 3-1 vertical refresh frequency at 1280x1024 000 43i Hz 001 60 Hz 010 71.2 Hz (CL-GD5434 rev. E and F) 011 74 Hz (CL-GD5434 rev. E and F) other reserved 0 reserved SeeAlso: #00032