102 lines
2.4 KiB
PHP
102 lines
2.4 KiB
PHP
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; rom bios call packet structures
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;*******************************
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;system service call ( int 15h )
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;*******************************
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;function ah = 0c0h, return system configuration
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;for pc and pcjr on return:
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; (ah) = 80h
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; (cy) = 1
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;for pcxt, pc portable and pcat on return:
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; (ah) = 86h
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; (cy) = 1
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;for all others:
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; (ah) = 0
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; (cy) = 0
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; (es:bx) = pointer to system descriptor vector in ros
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; system descriptor :
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; dw xxxx length of descriptor in bytes,
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; minimum length = 8
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; db xx model byte
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; 0ffh = pc
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; 0feh = pc/xt, portable
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; 0fdh = pc/jr
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; 0fch = pc/at, 6mhz pc/at,
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; 6mhz pc/at running coprocessor(?),
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; ps/2 model 50, 50 z
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; 0fah = ps/2 model 25, 30
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; 0f9h = pc convertible
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; 0f8h = ps/2 model 80
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; 0f7h = nova
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; 0e0 thru 0efh = reserved
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;
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; db xx secondary model byte
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; 000h = pc1
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; 000h = pc/xt, portable
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; 000h = pc/jr
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; 000h = pc/at
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; 001h = 6mhz pc/at
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; 003h = 6mhz pc/at running coprocessor(?)
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; 004h = ps/2 model 50, 50z
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; 001h = ps/2 model 25
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; 000h = pc convertible
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; 000h = ps/2 model 80
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; 000h = nova
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;
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; db xx bios revision level
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; 00 for first release, subsequent release
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; of code with same model byte and
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; secondary model byte require revison level
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; to increase by one.
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;
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; db xx feature information byte 1
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; x0000000 = 1, bios use dma channel 3
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; = 0, dma channel 3 not used
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;
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; 0x000000 = 1, 2nd interrupt chip present
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; = 0, 2nd interrupt chip not present
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;
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; 00x00000 = 1, real time clock present
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; = 0, real time clock not present
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;
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; 000x0000 = 1, keyboard escape sequence(int15h)
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; called in keyboard interrupt
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; (int 09h).
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; = 0, keyboard escape sequence not
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; called.
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; 0000xxxx reserved
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;
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; db xx feature information byte 2 - reserved
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;
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; db xx feature information byte 2 - reserved
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;
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; db xx feature information byte 2 - reserved
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;
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; db xx feature information byte 2 - reserved
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;
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bios_system_descriptor struc
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bios_sd_leng dw ?
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bios_sd_modelbyte db ?
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bios_sd_scnd_modelbyte db ?
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db ?
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bios_sd_featurebyte1 db ?
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db 4 dup (?)
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bios_system_descriptor ends
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;featurebyte1 bit map equates
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dmachannel3 equ 10000000b
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scndintcontroller equ 01000000b
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realtimeclock equ 00100000b
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keyescapeseq equ 00010000b
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;
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;model byte
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mdl_pc1 equ 0ffh
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mdl_xt equ 0feh
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mdl_jr equ 0fdh
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mdl_at equ 0fch
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mdl_convert equ 0f9h
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mdl_ps2_30 equ 0fah
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mdl_ps2_80 equ 0f8h
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