ref: 159d3efc8f369fcb284ef63a69ec502fb199597a
dir: /home/serial.asm/
Serial:: ; 6ef ; The serial interrupt. push af push bc push de push hl ld a, [hFFC9] and a jr nz, .asm_71c ld a, [wc2d4] bit 0, a jr nz, .asm_721 ld a, [hLinkPlayerNumber] 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, [hLinkPlayerNumber] 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 [hLinkPlayerNumber], 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 [hFFCA], 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 [hFFCC], 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, [hFFCC] and a ld a, b pop bc jr z, .asm_782 dec hl cp $fd jr nz, .asm_763 xor a ld [hFFCC], 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 [hFFCA], a ld a, [hLinkPlayerNumber] cp $2 jr nz, .asm_79b ld a, $1 ld [rSC], a ld a, $81 ld [rSC], a .asm_79b ld a, [hFFCA] and a jr nz, .asm_7e5 ld a, [hLinkPlayerNumber] 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, [hLinkPlayerNumber] cp $1 jr z, .asm_7e5 ld a, $ff .asm_7e2 dec a jr nz, .asm_7e2 .asm_7e5 xor a ld [hFFCA], 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, wPlayerLinkAction ld de, wOtherPlayerLinkMode ld c, $2 ld a, $1 ld [hFFCC], a .asm_847 call DelayFrame ld a, [hl] ld [hSerialSend], a call Function78a ld b, a inc hl ld a, [hFFCC] and a ld a, $0 ld [hFFCC], a jr nz, .asm_847 ld a, b ld [de], a inc de dec c jr nz, .asm_847 ret ; 862 Function862:: ; 862 call LoadTileMapToTempTileMap callab PlaceWaitingText call Function87d jp Call_LoadTempTileMapToTileMap ; 871 Function871:: ; 871 call LoadTileMapToTempTileMap callab PlaceWaitingText jp Function87d ; 87d ; One "giant" leap for machinekind Function87d:: ; 87d ld a, $ff ld [wOtherPlayerLinkAction], a .loop call LinkTransfer call DelayFrame call Function82b jr z, .check push hl ld hl, wcf5c dec [hl] jr nz, .skip dec hl dec [hl] jr nz, .skip pop hl xor a jp Function833 .skip pop hl .check ld a, [wOtherPlayerLinkAction] inc a jr z, .loop ld b, 10 .receive call DelayFrame call LinkTransfer dec b jr nz, .receive ld b, 10 .acknowledge call DelayFrame call LinkDataReceived dec b jr nz, .acknowledge ld a, [wOtherPlayerLinkAction] ld [wOtherPlayerLinkMode], a ret ; 8c1 LinkTransfer:: ; 8c1 push bc ld b, SERIAL_TIMECAPSULE ld a, [wLinkMode] cp LINK_TIMECAPSULE jr z, .got_high_nybble ld b, SERIAL_TIMECAPSULE jr c, .got_high_nybble cp LINK_TRADECENTER ld b, SERIAL_TRADECENTER jr z, .got_high_nybble ld b, SERIAL_BATTLE .got_high_nybble call .Receive ld a, [wPlayerLinkAction] add b ld [hSerialSend], a ld a, [hLinkPlayerNumber] cp $2 jr nz, .player_1 ld a, $1 ld [rSC], a ld a, $81 ld [rSC], a .player_1 call .Receive pop bc ret ; 8f3 .Receive ; 8f3 ld a, [hSerialReceive] ld [wOtherPlayerLinkMode], a and $f0 cp b ret nz xor a ld [hSerialReceive], a ld a, [wOtherPlayerLinkMode] and $f ld [wOtherPlayerLinkAction], a ret ; 908 LinkDataReceived:: ; 908 ; Let the other system know that the data has been received. xor a ld [hSerialSend], a ld a, [hLinkPlayerNumber] 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