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56 lines
1.1 KiB
ArmAsm
56 lines
1.1 KiB
ArmAsm
.include "mmu.inc"
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.export _rb_enable, _rb_disable, _rb_map_device, _rb_set_window
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.segment "CODE"
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;------------------------------------------
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; void __inline__ rb_enable(void);
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;------------------------------------------
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_rb_enable:
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mmu $02
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rts
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;------------------------------------------
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; void __inline__ rb_disable(void);
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;------------------------------------------
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_rb_disable:
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mmu $82
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rts
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;------------------------------------------
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; void __fastcall__ rb_set_window(void* address);
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;------------------------------------------
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_rb_set_window:
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;switch to native 16bit
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clc
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.byte $FB ; XCE
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.byte $C2, $30 ; REP #$30
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; init redstone window at $0300
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;.byte $A9, $00, $03 ; LDA #$0300
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.byte $EB ; XBA
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stx $55
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ora $55
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.byte $EB ; XBA
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mmu $01
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;switch to emulated 8bit
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.byte $E2, $30 ; SEP #$30
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sec
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.byte $FB ; XCE
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rts
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;------------------------------------------
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; void __fastcall__ rb_map_device(unsigned char id);
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;------------------------------------------
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_rb_map_device:
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mmu $00
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rts
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