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finally disassemble FarCall (rst $8)

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yenatch 2013-02-23 20:20:04 -05:00
parent 8bbfa54059
commit 78e0e17e53
1 changed files with 38 additions and 2 deletions
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40
main.asm
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@ -4,7 +4,7 @@ SECTION "rst0",HOME[$0]
jp Start jp Start
SECTION "rst8",HOME[$8] ; FarCall SECTION "rst8",HOME[$8] ; FarCall
jp $2d63 jp FarJpHl
SECTION "rst10",HOME[$10] ; Bankswitch SECTION "rst10",HOME[$10] ; Bankswitch
ld [$ff9d], a ld [$ff9d], a
@ -2355,7 +2355,43 @@ GetWorldMapLocation: ; 0x2caf
ret ret
; 0x2cbd ; 0x2cbd
INCBIN "baserom.gbc",$2cbd,$2d83-$2cbd INCBIN "baserom.gbc",$2cbd,$2d63-$2cbd
FarJpHl: ; 2d63
; Jump to a:hl.
; Preserves all registers besides a.
; Switch to the new bank.
ld [$ff8b], a
ld a, [$ff9d]
push af
ld a, [$ff8b]
rst Bankswitch
call .hl
; We want to retain the contents of f.
; To do this, we can pop to bc instead of af.
ld a, b
ld [$cfb9], a
ld a, c
ld [$cfba], a
; Restore the working bank.
pop bc
ld a, b
rst Bankswitch
ld a, [$cfb9]
ld b, a
ld a, [$cfba]
ld c, a
ret
.hl
jp [hl]
; 2d83
Predef: ; 2d83 Predef: ; 2d83
; call a function from given id a ; call a function from given id a