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split serial handshake into common/handshake.asm

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This commit is contained in:
yenatch 2013-09-08 23:53:04 -04:00
parent e7318ed4bc
commit 4778276f33
2 changed files with 39 additions and 39 deletions
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38
common/handshake.asm Normal file
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@ -0,0 +1,38 @@
AskSerial: ; 2063
; send out a handshake while serial int is off
ld a, [$c2d4]
bit 0, a
ret z
ld a, [$c2d5]
and a
ret nz
; once every 6 frames
ld hl, $ca8a
inc [hl]
ld a, [hl]
cp 6
ret c
xor a
ld [hl], a
ld a, $c
ld [$c2d5], a
; handshake
ld a, $88
ld [rSB], a
; switch to internal clock
ld a, %00000001
ld [rSC], a
; start transfer
ld a, %10000001
ld [rSC], a
ret
; 208a

40
main.asm
View File

@ -475,45 +475,7 @@ Function1d19: ; 1d19
INCLUDE "common/menu.asm"
AskSerial: ; 2063
; send out a handshake while serial int is off
ld a, [$c2d4]
bit 0, a
ret z
ld a, [$c2d5]
and a
ret nz
; once every 6 frames
ld hl, $ca8a
inc [hl]
ld a, [hl]
cp 6
ret c
xor a
ld [hl], a
ld a, $c
ld [$c2d5], a
; handshake
ld a, $88
ld [rSB], a
; switch to internal clock
ld a, %00000001
ld [rSC], a
; start transfer
ld a, %10000001
ld [rSC], a
ret
; 208a
INCLUDE "common/handshake.asm"
INCLUDE "common/game_time.asm"