mirror of
https://github.com/wwarthen/RomWBW.git
synced 2026-02-06 22:43:15 -06:00
5f205dd90b
Revised hbios.asm to compile in 3 modes (ROM/APP/IMG boot). Updated and simplified ROM bank assignments.
58 lines
1.6 KiB
NASM
58 lines
1.6 KiB
NASM
;
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;==================================================================================================
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; SETUP
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;==================================================================================================
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;
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#INCLUDE "std.asm"
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#INCLUDE "hbios.exp"
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;
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.ORG 0
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;
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;==================================================================================================
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; NORMAL PAGE ZERO SETUP, RET/RETI/RETN AS APPROPRIATE
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;==================================================================================================
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;
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.FILL (000H - $),0FFH ; RST 0
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JP START ; JUMP TO BOOT CODE
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.FILL (004H - $),0FFH ; FILL TO START OF SIG PTR
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.DW ROM_SIG
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.FILL (008H - $),0FFH ; RST 8
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RET
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.FILL (010H - $),0FFH ; RST 10
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RET
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.FILL (018H - $),0FFH ; RST 18
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RET
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.FILL (020H - $),0FFH ; RST 20
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RET
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.FILL (028H - $),0FFH ; RST 28
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RET
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.FILL (030H - $),0FFH ; RST 30
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RET
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.FILL (038H - $),0FFH ; INT
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RETI
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.FILL (066H - $),0FFH ; NMI
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RETN
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;
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.FILL (070H - $),0FFH ; SIG STARTS AT $80
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;
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ROM_SIG:
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.DB $76, $B5 ; 2 SIGNATURE BYTES
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.DB 1 ; STRUCTURE VERSION NUMBER
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.DB 7 ; ROM SIZE (IN MULTIPLES OF 4KB, MINUS ONE)
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.DW NAME ; POINTER TO HUMAN-READABLE ROM NAME
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.DW AUTH ; POINTER TO AUTHOR INITIALS
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.DW DESC ; POINTER TO LONGER DESCRIPTION OF ROM
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.DB 0, 0, 0, 0, 0, 0 ; RESERVED FOR FUTURE USE; MUST BE ZERO
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;
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NAME .DB "ROMWBW v", BIOSVER, ", ", TIMESTAMP, 0
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AUTH .DB "WBW",0
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DESC .DB "ROMWBW v", BIOSVER, ", Copyright 2014, Wayne Warthen, GNU GPL v3", 0
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;
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.FILL ($100 - $),$FF ; PAD REMAINDER OF PAGE ZERO
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;
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#define ROMLOAD
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#INCLUDE "loader.asm"
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;
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.FILL $8000 - $,$FF
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.END
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