INT 4F - TI Professional PCIBM PC - SYSTEM CONFIGURATION CALL Return: AX = system configuration word (see #03227) BX = size of contiguous DOS memory in paragraphs SeeAlso: INT 11"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.",INT 12"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.",INT 40"TI Professional",INT 48/AH=09h SeeAlso: INT 49/AH=01h"TI",INT 4B"TI Professional",INT 4D/AH=00h SeeAlso: INT 4E"TI Professional" Bitfields for TI Professional PCIBM PC system configuration: Bit(s) Description (Table 03227) 0 floppy drive 0 (A:, internal) installed 1 floppy drive 1 (B:, internal) installed 2 floppy drive 2 (C:, external) installed 3 floppy drive 3 (D:, external) installed 4 drive A: is 96tpi (80 tracks) 5 drive A: is double-sided 6 60 Hz power instead of 50 Hz 7 hard disk (E: or E:/F:) installed 8 serial port 1 installed 9 serial port 2 installed 10 serial port 3 installed 11 serial port 4 installed 14-12 installed graphics RAM(Random Access Memory) See also DRAM, SRAM. 000 none (text-only system) 001 bank A only (graphics limited to 2 of 8 colors) 111 banks A/B/C (graphics supports 8 of 8 colors) 15 clock/analog board installed