INT 11 - BIOS - GET EQUIPMENT LIST Return: (E)AX = BIOS equipment list word (see below) Note: since older BIOSes do not know of the existence of EAX, the high word of EAX should be cleared before this call if any of the high bits will be tested Bitfields for BIOS equipment list: bit 0 floppy disk(s) installed (see bits 6-7) bit 1 80x87 coprocessor installed bits 2,3 number of 16K banks of RAM on motherboard (PC only) number of 64K banks of RAM on motherboard (XT only) bit 2 pointing device installed (PS) bit 3 unused (PS) bits 4-5 initial video mode 00 EGA, VGA, or PGA 01 40x25 color 10 80x25 color 11 80x25 monochrome bits 6-7 number of floppies installed less 1 (if bit 0 set) bit 8 DMA support installed (PCjr, some Tandy 1000s, 1400LT) bits 9-11 number of serial ports installed bit 12 game port installed bit 13 serial printer attached (PCjr) internal modem installed (PC/Convertible) bits 14-15 number of parallel ports installed ---Compaq, Dell, and many other 386/486 machines-- bit 23: page tables set so that Weitek coprocessor addressable in real mode bit 24: Weitek math coprocessor present ---Compaq Systempro--- bit 25: internal DMA parallel port available bit 26: IRQ for internal DMA parallel port (if bit 25 set) 0 = IRQ5 1 = IRQ7 bits 27,28: parallel port DMA channel 00 DMA channel 0 01 DMA channel 0 ??? 10 reserved 11 DMA channel 3 SeeAlso: INT 12 .