pokecrystal-board/home/serial.asm
2015-10-19 16:49:29 -04:00

407 lines
4.4 KiB
NASM

Serial:: ; 6ef
; The serial interrupt.
push af
push bc
push de
push hl
ld a, [$ffc9]
and a
jr nz, .asm_71c
ld a, [wc2d4]
bit 0, a
jr nz, .asm_721
ld a, [$ffcb]
inc a ; is it equal to -1?
jr z, .asm_726
ld a, [rSB]
ld [hSerialReceive], a
ld a, [hSerialSend]
ld [rSB], a
ld a, [$ffcb]
cp $2
jr z, .asm_752
ld a, 0 << rSC_ON
ld [rSC], a
ld a, 1 << rSC_ON
ld [rSC], a
jr .asm_752
.asm_71c
call Function3e80
jr .asm_75a
.asm_721
call Function2057
jr .asm_75a
.asm_726
ld a, [rSB]
cp $1
jr z, .asm_730
cp $2
jr nz, .asm_752
.asm_730
ld [hSerialReceive], a
ld [$ffcb], a
cp $2
jr z, .asm_74f
xor a
ld [rSB], a
ld a, $3
ld [rDIV], a
.asm_73f
ld a, [rDIV]
bit 7, a
jr nz, .asm_73f
ld a, 0 << rSC_ON
ld [rSC], a
ld a, 1 << rSC_ON
ld [rSC], a
jr .asm_752
.asm_74f
xor a
ld [rSB], a
.asm_752
ld a, $1
ld [$ffca], a
ld a, $fe
ld [hSerialSend], a
.asm_75a
pop hl
pop de
pop bc
pop af
reti
; 75f
Function75f:: ; 75f
ld a, $1
ld [$ffcc], a
.asm_763
ld a, [hl]
ld [hSerialSend], a
call Function78a
push bc
ld b, a
inc hl
ld a, $30
.asm_76e
dec a
jr nz, .asm_76e
ld a, [$ffcc]
and a
ld a, b
pop bc
jr z, .asm_782
dec hl
cp $fd
jr nz, .asm_763
xor a
ld [$ffcc], a
jr .asm_763
.asm_782
ld [de], a
inc de
dec bc
ld a, b
or c
jr nz, .asm_763
ret
; 78a
Function78a:: ; 78a
xor a
ld [$ffca], a
ld a, [$ffcb]
cp $2
jr nz, .asm_79b
ld a, $1
ld [rSC], a
ld a, $81
ld [rSC], a
.asm_79b
ld a, [$ffca]
and a
jr nz, .asm_7e5
ld a, [$ffcb]
cp $1
jr nz, .asm_7c0
call Function82b
jr z, .asm_7c0
call .asm_825
push hl
ld hl, wcf5c
inc [hl]
jr nz, .asm_7b7
dec hl
inc [hl]
.asm_7b7
pop hl
call Function82b
jr nz, .asm_79b
jp Function833
.asm_7c0
ld a, [rIE]
and $f
cp $8
jr nz, .asm_79b
ld a, [wcf5d]
dec a
ld [wcf5d], a
jr nz, .asm_79b
ld a, [wcf5d + 1]
dec a
ld [wcf5d + 1], a
jr nz, .asm_79b
ld a, [$ffcb]
cp $1
jr z, .asm_7e5
ld a, $ff
.asm_7e2
dec a
jr nz, .asm_7e2
.asm_7e5
xor a
ld [$ffca], a
ld a, [rIE]
and $f
sub $8
jr nz, .asm_7f8
ld [wcf5d], a
ld a, $50
ld [wcf5d + 1], a
.asm_7f8
ld a, [hSerialReceive]
cp $fe
ret nz
call Function82b
jr z, .asm_813
push hl
ld hl, wcf5c
ld a, [hl]
dec a
ld [hld], a
inc a
jr nz, .asm_80d
dec [hl]
.asm_80d
pop hl
call Function82b
jr z, Function833
.asm_813
ld a, [rIE]
and $f
cp $8
ld a, $fe
ret z
ld a, [hl]
ld [hSerialSend], a
call DelayFrame
jp Function78a
.asm_825
ld a, $f
.asm_827
dec a
jr nz, .asm_827
ret
; 82b
Function82b:: ; 82b
push hl
ld hl, wcf5b
ld a, [hli]
or [hl]
pop hl
ret
; 833
Function833:: ; 833
dec a
ld [wcf5b], a
ld [wcf5c], a
ret
; 83b
Function83b:: ; 83b
ld hl, wcf56
ld de, wcf51
ld c, $2
ld a, $1
ld [$ffcc], a
.asm_847
call DelayFrame
ld a, [hl]
ld [hSerialSend], a
call Function78a
ld b, a
inc hl
ld a, [$ffcc]
and a
ld a, $0
ld [$ffcc], a
jr nz, .asm_847
ld a, b
ld [de], a
inc de
dec c
jr nz, .asm_847
ret
; 862
Function862:: ; 862
call Function309d
callab Function4000
call Function87d
jp Function30b4
; 871
Function871:: ; 871
call Function309d
callab Function4000
jp Function87d
; 87d
Function87d:: ; 87d
ld a, $ff
ld [wcf52], a
.asm_882
call Function8c1
call DelayFrame
call Function82b
jr z, .asm_89e
push hl
ld hl, wcf5c
dec [hl]
jr nz, .asm_89d
dec hl
dec [hl]
jr nz, .asm_89d
pop hl
xor a
jp Function833
.asm_89d
pop hl
.asm_89e
ld a, [wcf52]
inc a
jr z, .asm_882
ld b, $a
.asm_8a6
call DelayFrame
call Function8c1
dec b
jr nz, .asm_8a6
ld b, $a
.asm_8b1
call DelayFrame
call Function908
dec b
jr nz, .asm_8b1
ld a, [wcf52]
ld [wcf51], a
ret
; 8c1
Function8c1:: ; 8c1
push bc
ld b, $60
ld a, [wLinkMode]
cp $1
jr z, .asm_8d7
ld b, $60
jr c, .asm_8d7
cp $2
ld b, $70
jr z, .asm_8d7
ld b, $80
.asm_8d7
call Function8f3
ld a, [wcf56]
add b
ld [hSerialSend], a
ld a, [$ffcb]
cp $2
jr nz, .asm_8ee
ld a, $1
ld [rSC], a
ld a, $81
ld [rSC], a
.asm_8ee
call Function8f3
pop bc
ret
; 8f3
Function8f3:: ; 8f3
ld a, [hSerialReceive]
ld [wcf51], a
and $f0
cp b
ret nz
xor a
ld [hSerialReceive], a
ld a, [wcf51]
and $f
ld [wcf52], a
ret
; 908
Function908:: ; 908
xor a
ld [hSerialSend], a
ld a, [$ffcb]
cp $2
ret nz
ld a, $1
ld [rSC], a
ld a, $81
ld [rSC], a
ret
; 919
Function919:: ; 919
ld a, [wLinkMode]
and a
ret nz
ld a, $2
ld [rSB], a
xor a
ld [hSerialReceive], a
ld a, $0
ld [rSC], a
ld a, $80
ld [rSC], a
ret
; 92e