81 lines
1.2 KiB
ArmAsm
81 lines
1.2 KiB
ArmAsm
; Build as GB ROM
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.memoryMap
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defaultSlot 0
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slot 0 $0000 size $4000
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slot 1 $C000 size $4000
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.endMe
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.romBankSize $4000 ; generates $8000 byte ROM
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.romBanks 2
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.cartridgeType 1 ; MBC1
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.computeChecksum
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.computeComplementCheck
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;;;; GB ROM header
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; GB header read by bootrom
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.org $100
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nop
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jp reset
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; Nintendo logo required for proper boot
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.byte $CE,$ED,$66,$66,$CC,$0D,$00,$0B
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.byte $03,$73,$00,$83,$00,$0C,$00,$0D
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.byte $00,$08,$11,$1F,$88,$89,$00,$0E
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.byte $DC,$CC,$6E,$E6,$DD,$DD,$D9,$99
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.byte $BB,$BB,$67,$63,$6E,$0E,$EC,$CC
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.byte $DD,$DC,$99,$9F,$BB,$B9,$33,$3E
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; Internal name
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.ifdef ROM_NAME
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.byte ROM_NAME
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.endif
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; CGB/DMG requirements
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.org $143
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.ifdef REQUIRE_CGB
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.byte $C0
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.else
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.ifndef REQUIRE_DMG
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.byte $80
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.endif
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.endif
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.org $200
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;;;; Shell
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.include "runtime.s"
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.include "console.s"
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init_runtime:
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call console_init
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.ifdef TEST_NAME
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print_str TEST_NAME,newline,newline
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.endif
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ret
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std_print:
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push af
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sta SB
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wreg SC,$81
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delay 2304
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pop af
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jp console_print
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post_exit:
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call console_show
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call play_byte
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forever:
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wreg NR52,0 ; sound off
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- jr -
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play_byte:
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ret
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.ends
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