2016-05-11 21:16:03 +00:00
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Printer_StartTransmission: ; 84000
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ld hl, wGameboyPrinterRAM
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ld bc, wGameboyPrinterRAMEnd - wGameboyPrinterRAM
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xor a
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call Printer_ByteFill
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xor a
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ld [rSB], a
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ld [rSC], a
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ld [wPrinterOpcode], a
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ld hl, wPrinterConnectionOpen
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set 0, [hl]
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ld a, [GBPrinter]
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ld [wGBPrinterSettings], a
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xor a
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ld [wJumptableIndex], a
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ret
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; 84022
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PrinterJumptableIteration: ; 84022
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ld a, [wJumptableIndex]
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ld e, a
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ld d, 0
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ld hl, .Jumptable
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add hl, de
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add hl, de
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ld a, [hli]
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ld h, [hl]
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ld l, a
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2017-06-09 21:01:10 +00:00
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jp hl
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2016-05-11 21:16:03 +00:00
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; 84031
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.Jumptable: ; 84031 (21:4031)
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dw Print_InitPrinterHandshake ; 00
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dw Printer_CheckConnectionStatus ; 01
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dw Printer_WaitSerial ; 02
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dw Printer_StartTransmittingTilemap ; 03
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dw Printer_TransmissionLoop ; 04
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dw Printer_WaitSerialAndLoopBack2 ; 05
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dw Printer_EndTilemapTransmission ; 06
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dw Printer_TransmissionLoop ; 07
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dw Printer_WaitSerial ; 08
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dw Printer_SignalSendHeader ; 09
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dw Printer_TransmissionLoop ; 0a
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dw Printer_WaitSerial ; 0b
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dw Printer_WaitUntilFinished ; 0c
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dw Printer_Quit ; 0d
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dw Printer_NextSection_ ; 0e
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dw Printer_WaitSerial ; 0f
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dw Printer_SignalLoopBack ; 10
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dw Printer_SectionOne ; 11
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dw Printer_WaitLoopBack ; 12
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dw Printer_WaitLoopBack_ ; 13
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Printer_NextSection: ; 84059 (21:4059)
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ld hl, wJumptableIndex
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inc [hl]
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ret
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Printer_PrevSection: ; 8405e (21:405e)
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ld hl, wJumptableIndex
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dec [hl]
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ret
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Printer_Quit: ; 84063 (21:4063)
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xor a
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ld [wPrinterStatusFlags], a
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ld hl, wJumptableIndex
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set 7, [hl]
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ret
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Printer_NextSection_: ; 8406d (21:406d)
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call Printer_NextSection
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ret
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Printer_SectionOne: ; 84071 (21:4071)
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ld a, $1
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ld [wJumptableIndex], a
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ret
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Print_InitPrinterHandshake: ; 84077 (21:4077)
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call Printer_ResetData
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ld hl, PrinterDataPacket1
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call Printer_CopyPacket
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xor a
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ld [wPrinterSendByteCounter], a
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ld [wPrinterSendByteCounter + 1], a
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ld a, [wPrinterQueueLength]
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ld [wPrinterRowIndex], a
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call Printer_NextSection
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call Printer_WaitHandshake
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ld a, PRINTER_STATUS_CHECKING
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ld [wPrinterStatus], a
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ret
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Printer_StartTransmittingTilemap: ; 84099 (21:4099)
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call Printer_ResetData
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; check ???
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ld hl, wPrinterRowIndex
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ld a, [hl]
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and a
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jr z, Printer_EndTilemapTransmission
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; send packet 3
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ld hl, PrinterDataPacket3 ; signal start of transmission
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call Printer_CopyPacket
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; prepare to send 40 tiles
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call Printer_Convert2RowsTo2bpp
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ld a, (40 tiles) % $100
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ld [wPrinterSendByteCounter], a
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ld a, (40 tiles) / $100
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ld [wPrinterSendByteCounter + 1], a
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; compute the checksum
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call Printer_ComputeChecksum
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call Printer_NextSection
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call Printer_WaitHandshake
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ld a, PRINTER_STATUS_TRANSMITTING
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ld [wPrinterStatus], a
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ret
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Printer_EndTilemapTransmission: ; 840c5 (21:40c5)
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; ensure that we go from here to routine 7
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ld a, $6
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ld [wJumptableIndex], a
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; send packet 4
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ld hl, PrinterDataPacket4 ; signal no transmission
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call Printer_CopyPacket
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; send no tile data
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xor a
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ld [wPrinterSendByteCounter], a
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ld [wPrinterSendByteCounter + 1], a
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call Printer_NextSection
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call Printer_WaitHandshake
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ret
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Printer_SignalSendHeader: ; 840de (21:40de)
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call Printer_ResetData
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ld hl, PrinterDataPacket2 ; signal request print
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call Printer_CopyPacket
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; prepare to send 1 tile
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call Printer_StageHeaderForSend
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ld a, 4 % $100
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ld [wPrinterSendByteCounter], a
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ld a, 4 / $100
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ld [wPrinterSendByteCounter + 1], a
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; compute the checksum
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call Printer_ComputeChecksum
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call Printer_NextSection
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call Printer_WaitHandshake
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ld a, PRINTER_STATUS_PRINTING
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ld [wPrinterStatus], a
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ret
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Printer_SignalLoopBack: ; 84103 (21:4103)
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call Printer_ResetData
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; send packet 1
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ld hl, PrinterDataPacket1 ; signal no transmission
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call Printer_CopyPacket
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; send no tile data
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xor a
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ld [wPrinterSendByteCounter], a
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ld [wPrinterSendByteCounter + 1], a
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ld a, [wPrinterQueueLength]
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ld [wPrinterRowIndex], a
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call Printer_NextSection
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call Printer_WaitHandshake
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ret
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Printer_WaitSerial: ; 84120 (21:4120)
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ld hl, wPrinterSerialFrameDelay
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inc [hl]
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ld a, [hl]
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cp $6
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ret c
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xor a
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ld [hl], a
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call Printer_NextSection
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ret
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Printer_WaitSerialAndLoopBack2: ; 8412e (21:412e)
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ld hl, wPrinterSerialFrameDelay
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inc [hl]
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ld a, [hl]
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cp $6
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ret c
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xor a
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ld [hl], a
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ld hl, wPrinterRowIndex
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dec [hl]
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call Printer_PrevSection
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call Printer_PrevSection
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ret
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Printer_CheckConnectionStatus: ; 84143 (21:4143)
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ld a, [wPrinterOpcode]
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and a
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ret nz
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ld a, [wPrinterHandshake]
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cp $ff
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jr nz, .printer_connected
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ld a, [wPrinterStatusFlags]
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cp $ff
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jr z, .printer_error
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.printer_connected
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ld a, [wPrinterHandshake]
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cp $81
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jr nz, .printer_error
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ld a, [wPrinterStatusFlags]
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cp $0
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jr nz, .printer_error
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ld hl, wPrinterConnectionOpen
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set 1, [hl]
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ld a, $5
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ld [wHandshakeFrameDelay], a
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call Printer_NextSection
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ret
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.printer_error
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ld a, $ff
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ld [wPrinterHandshake], a
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ld [wPrinterStatusFlags], a
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ld a, $e
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ld [wJumptableIndex], a
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ret
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Printer_TransmissionLoop: ; 84180 (21:4180)
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ld a, [wPrinterOpcode]
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and a
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ret nz
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ld a, [wPrinterStatusFlags]
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and $f0
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jr nz, .enter_wait_loop
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ld a, [wPrinterStatusFlags]
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and $1
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jr nz, .cycle_back
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call Printer_NextSection
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ret
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.cycle_back
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call Printer_PrevSection
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ret
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.enter_wait_loop
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ld a, $12 ; Printer_WaitLoopBack
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ld [wJumptableIndex], a
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ret
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Printer_WaitUntilFinished: ; 841a1 (21:41a1)
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ld a, [wPrinterOpcode]
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and a
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ret nz
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ld a, [wPrinterStatusFlags]
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and $f3
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ret nz
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call Printer_NextSection
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ret
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Printer_WaitLoopBack: ; 841b0 (21:41b0)
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call Printer_NextSection
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Printer_WaitLoopBack_: ; 841b3 (21:41b3)
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ld a, [wPrinterOpcode]
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and a
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ret nz
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ld a, [wPrinterStatusFlags]
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and $f0
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ret nz
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xor a
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ld [wJumptableIndex], a
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ret
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Printer_WaitHandshake: ; 841c3 (21:41c3)
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.loop
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ld a, [wPrinterOpcode]
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and a
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jr nz, .loop
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xor a
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ld [wPrinterSendByteOffset], a
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ld [wPrinterSendByteOffset + 1], a
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ld a, $1
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ld [wPrinterOpcode], a
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ld a, $88
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ld [rSB], a
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ld a, $1
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ld [rSC], a
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ld a, $81
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ld [rSC], a
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ret
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Printer_CopyPacket: ; 841e2 (21:41e2)
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ld a, [hli]
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2017-12-09 20:28:03 +00:00
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ld [wPrinterData], a
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2016-05-11 21:16:03 +00:00
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ld a, [hli]
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2017-12-09 20:28:03 +00:00
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ld [wPrinterData + 1], a
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2016-05-11 21:16:03 +00:00
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ld a, [hli]
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2017-12-09 20:28:03 +00:00
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ld [wPrinterData + 2], a
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2016-05-11 21:16:03 +00:00
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ld a, [hli]
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2017-12-09 20:28:03 +00:00
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ld [wPrinterData + 3], a
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2016-05-11 21:16:03 +00:00
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ld a, [hli]
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ld [wPrinterChecksum], a
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ld a, [hl]
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ld [wPrinterChecksum + 1], a
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ret
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Printer_ResetData: ; 841fb (21:41fb)
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xor a
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2017-12-09 20:28:03 +00:00
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ld hl, wPrinterData
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2016-05-11 21:16:03 +00:00
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ld [hli], a
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ld [hli], a
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ld [hli], a
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ld [hl], a
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ld hl, wPrinterChecksum
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ld [hli], a
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ld [hl], a
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xor a
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ld [wPrinterSendByteCounter], a
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ld [wPrinterSendByteCounter + 1], a
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ld hl, wGameboyPrinterRAM
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ld bc, wGameboyPrinter2bppSourceEnd - wGameboyPrinter2bppSource
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call Printer_ByteFill
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ret
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Printer_ComputeChecksum: ; 84219 (21:4219)
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ld hl, 0
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ld bc, 4
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2017-12-09 20:28:03 +00:00
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ld de, wPrinterData
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2016-05-11 21:16:03 +00:00
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call .ComputeChecksum
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ld a, [wPrinterSendByteCounter]
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ld c, a
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ld a, [wPrinterSendByteCounter + 1]
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ld b, a
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ld de, wGameboyPrinterRAM
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call .ComputeChecksum
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ld a, l
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ld [wPrinterChecksum], a
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ld a, h
|
|
|
|
|
ld [wPrinterChecksum + 1], a
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.ComputeChecksum: ; 8423c (21:423c)
|
|
|
|
|
.loop
|
|
|
|
|
ld a, [de]
|
|
|
|
|
inc de
|
|
|
|
|
add l
|
|
|
|
|
jr nc, .no_overflow
|
|
|
|
|
inc h
|
|
|
|
|
.no_overflow
|
|
|
|
|
ld l, a
|
|
|
|
|
dec bc
|
|
|
|
|
ld a, c
|
|
|
|
|
or b
|
|
|
|
|
jr nz, .loop
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_StageHeaderForSend: ; 84249 (21:4249)
|
|
|
|
|
ld a, $1
|
|
|
|
|
ld [wGameboyPrinter2bppSource + 0], a
|
|
|
|
|
ld a, [wcbfa]
|
|
|
|
|
ld [wGameboyPrinter2bppSource + 1], a
|
|
|
|
|
ld a, %11100100
|
|
|
|
|
ld [wGameboyPrinter2bppSource + 2], a
|
|
|
|
|
ld a, [wGBPrinterSettings]
|
|
|
|
|
ld [wGameboyPrinter2bppSource + 3], a
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Convert2RowsTo2bpp: ; 84260 (21:4260)
|
|
|
|
|
; de = wPrinterTileMapBuffer + 2 * SCREEN_WIDTH * ([wPrinterQueueLength] - [wPrinterRowIndex])
|
|
|
|
|
ld a, [wPrinterRowIndex]
|
|
|
|
|
xor $ff
|
|
|
|
|
ld d, a
|
|
|
|
|
ld a, [wPrinterQueueLength]
|
|
|
|
|
inc a
|
|
|
|
|
add d
|
|
|
|
|
ld hl, wPrinterTileMapBuffer
|
|
|
|
|
ld de, 2 * SCREEN_WIDTH
|
|
|
|
|
.loop1
|
|
|
|
|
and a
|
|
|
|
|
jr z, .okay1
|
|
|
|
|
add hl, de
|
|
|
|
|
dec a
|
|
|
|
|
jr .loop1
|
|
|
|
|
.okay1
|
|
|
|
|
ld e, l
|
|
|
|
|
ld d, h
|
|
|
|
|
ld hl, wGameboyPrinter2bppSource
|
|
|
|
|
ld c, 2 * SCREEN_WIDTH
|
|
|
|
|
.loop2
|
|
|
|
|
ld a, [de]
|
|
|
|
|
inc de
|
|
|
|
|
push bc
|
|
|
|
|
push de
|
|
|
|
|
push hl
|
|
|
|
|
; convert tile index to vram address
|
|
|
|
|
swap a
|
|
|
|
|
ld d, a
|
|
|
|
|
and $f0
|
|
|
|
|
ld e, a
|
|
|
|
|
ld a, d
|
|
|
|
|
and $f
|
|
|
|
|
ld d, a
|
|
|
|
|
and $8
|
|
|
|
|
ld a, d
|
|
|
|
|
jr nz, .vtiles_8xxx
|
|
|
|
|
or $90
|
|
|
|
|
jr .got_vtile_addr
|
|
|
|
|
|
|
|
|
|
.vtiles_8xxx
|
|
|
|
|
or $80
|
|
|
|
|
.got_vtile_addr
|
|
|
|
|
ld d, a
|
|
|
|
|
; copy 1 vtile to hl
|
|
|
|
|
lb bc, BANK(Printer_Convert2RowsTo2bpp), 1
|
|
|
|
|
call Request2bpp
|
|
|
|
|
pop hl
|
|
|
|
|
ld de, 1 tiles
|
|
|
|
|
add hl, de
|
|
|
|
|
pop de
|
|
|
|
|
pop bc
|
|
|
|
|
dec c
|
|
|
|
|
jr nz, .loop2
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_ByteFill: ; 842ab
|
|
|
|
|
push de
|
|
|
|
|
ld e, a
|
|
|
|
|
.loop
|
|
|
|
|
ld [hl], e
|
|
|
|
|
inc hl
|
|
|
|
|
dec bc
|
|
|
|
|
ld a, c
|
|
|
|
|
or b
|
|
|
|
|
jr nz, .loop
|
|
|
|
|
ld a, e
|
|
|
|
|
pop de
|
|
|
|
|
ret
|
|
|
|
|
; 842b7
|
|
|
|
|
|
|
|
|
|
PrinterDataPacket1:
|
|
|
|
|
db 1, 0, $00, 0
|
|
|
|
|
dw 1
|
|
|
|
|
PrinterDataPacket2:
|
|
|
|
|
db 2, 0, $04, 0
|
|
|
|
|
dw 0
|
|
|
|
|
PrinterDataPacket3:
|
|
|
|
|
db 4, 0, $80, 2
|
|
|
|
|
dw 0
|
|
|
|
|
PrinterDataPacket4:
|
|
|
|
|
db 4, 0, $00, 0
|
|
|
|
|
dw 4
|
|
|
|
|
PrinterDataPacket5: ; unused
|
|
|
|
|
db 8, 0, $00, 0
|
|
|
|
|
dw 8
|
|
|
|
|
PrinterDataPacket6: ; unused
|
|
|
|
|
db 15, 0, $00, 0
|
|
|
|
|
dw 15
|
|
|
|
|
; 842db
|
|
|
|
|
|
|
|
|
|
_PrinterReceive:: ; 842db
|
|
|
|
|
ld a, [wPrinterOpcode]
|
|
|
|
|
add a
|
|
|
|
|
ld e, a
|
|
|
|
|
ld d, 0
|
|
|
|
|
ld hl, .Jumptable
|
|
|
|
|
add hl, de
|
|
|
|
|
ld a, [hli]
|
|
|
|
|
ld h, [hl]
|
|
|
|
|
ld l, a
|
2017-06-09 21:01:10 +00:00
|
|
|
jp hl
|
2016-05-11 21:16:03 +00:00
|
|
|
; 842ea
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.Jumptable: ; 842ea (21:42ea)
|
|
|
|
|
dw Printer_DoNothing ; 00
|
|
|
|
|
|
|
|
|
|
dw Printer_Send0x33 ; 01
|
2017-12-09 20:28:03 +00:00
|
|
|
dw Printer_SendPrinterData1 ; 02
|
|
|
|
|
dw Printer_SendPrinterData2 ; 03
|
|
|
|
|
dw Printer_SendPrinterData3 ; 04
|
|
|
|
|
dw Printer_SendPrinterData4 ; 05
|
2016-05-11 21:16:03 +00:00
|
|
|
dw Printer_SendNextByte ; 06
|
|
|
|
|
dw Printer_SendwPrinterChecksumLo ; 07
|
|
|
|
|
dw Printer_SendwPrinterChecksumHi ; 08
|
|
|
|
|
dw Printer_Send0x00 ; 09
|
|
|
|
|
dw Printer_ReceiveTowPrinterHandshakeAndSend0x00 ; 0a
|
|
|
|
|
dw Printer_ReceiveTowPrinterStatusFlagsAndExitSendLoop ; 0b
|
|
|
|
|
|
|
|
|
|
dw Printer_Send0x33 ; 0c triggered by AskSerial
|
|
|
|
|
dw Printer_Send0x0f ; 0d
|
|
|
|
|
dw Printer_Send0x00_ ; 0e
|
|
|
|
|
dw Printer_Send0x00_ ; 0f
|
|
|
|
|
dw Printer_Send0x00_ ; 10
|
|
|
|
|
dw Printer_Send0x0f ; 11
|
|
|
|
|
dw Printer_Send0x00_ ; 12
|
|
|
|
|
dw Printer_Send0x00 ; 13
|
|
|
|
|
dw Printer_ReceiveTowPrinterHandshakeAndSend0x00 ; 14
|
|
|
|
|
dw Printer_ReceiveTowPrinterStatusFlagsAndExitSendLoop_ ; 15
|
|
|
|
|
|
|
|
|
|
dw Printer_Send0x33 ; 16 triggered by pressing B
|
|
|
|
|
dw Printer_Send0x08 ; 17
|
|
|
|
|
dw Printer_Send0x00_ ; 18
|
|
|
|
|
dw Printer_Send0x00_ ; 19
|
|
|
|
|
dw Printer_Send0x00_ ; 1a
|
|
|
|
|
dw Printer_Send0x08 ; 1b
|
|
|
|
|
dw Printer_Send0x00_ ; 1c
|
|
|
|
|
dw Printer_Send0x00 ; 1d
|
|
|
|
|
dw Printer_ReceiveTowPrinterHandshakeAndSend0x00 ; 1e
|
|
|
|
|
dw Printer_ReceiveTowPrinterStatusFlagsAndExitSendLoop ; 1f
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Printer_NextInstruction: ; 8432a (21:432a)
|
|
|
|
|
ld hl, wPrinterOpcode
|
|
|
|
|
inc [hl]
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_DoNothing: ; 8432f (21:432f)
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Send0x33: ; 84330 (21:4330)
|
|
|
|
|
ld a, $33
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
2017-12-09 20:28:03 +00:00
|
|
|
Printer_SendPrinterData1: ; 84339 (21:4339)
|
|
|
|
|
ld a, [wPrinterData]
|
2016-05-11 21:16:03 +00:00
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
2017-12-09 20:28:03 +00:00
|
|
|
Printer_SendPrinterData2: ; 84343 (21:4343)
|
|
|
|
|
ld a, [wPrinterData + 1]
|
2016-05-11 21:16:03 +00:00
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
2017-12-09 20:28:03 +00:00
|
|
|
Printer_SendPrinterData3: ; 8434d (21:434d)
|
|
|
|
|
ld a, [wPrinterData + 2]
|
2016-05-11 21:16:03 +00:00
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
2017-12-09 20:28:03 +00:00
|
|
|
Printer_SendPrinterData4: ; 84357 (21:4357)
|
|
|
|
|
ld a, [wPrinterData + 3]
|
2016-05-11 21:16:03 +00:00
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_SendNextByte: ; 84361 (21:4361)
|
|
|
|
|
; decrement 16-bit counter
|
|
|
|
|
ld hl, wPrinterSendByteCounter
|
|
|
|
|
ld a, [hli]
|
|
|
|
|
ld d, [hl]
|
|
|
|
|
ld e, a
|
|
|
|
|
or d
|
|
|
|
|
jr z, .done
|
|
|
|
|
dec de
|
|
|
|
|
ld [hl], d
|
|
|
|
|
dec hl
|
|
|
|
|
ld [hl], e
|
|
|
|
|
|
|
|
|
|
ld a, [wPrinterSendByteOffset]
|
|
|
|
|
ld e, a
|
|
|
|
|
ld a, [wPrinterSendByteOffset + 1]
|
|
|
|
|
ld d, a
|
|
|
|
|
ld hl, wGameboyPrinterRAM
|
|
|
|
|
add hl, de
|
|
|
|
|
inc de
|
|
|
|
|
ld a, e
|
|
|
|
|
ld [wPrinterSendByteOffset], a
|
|
|
|
|
ld a, d
|
|
|
|
|
ld [wPrinterSendByteOffset + 1], a
|
|
|
|
|
ld a, [hl]
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.done
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
Printer_SendwPrinterChecksumLo: ; 8438b (21:438b)
|
|
|
|
|
ld a, [wPrinterChecksum]
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_SendwPrinterChecksumHi: ; 84395 (21:4395)
|
|
|
|
|
ld a, [wPrinterChecksum + 1]
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Send0x00: ; 8439f (21:439f)
|
|
|
|
|
ld a, $0
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_ReceiveTowPrinterHandshakeAndSend0x00: ; 843a8 (21:43a8)
|
|
|
|
|
ld a, [rSB]
|
|
|
|
|
ld [wPrinterHandshake], a
|
|
|
|
|
ld a, $0
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_ReceiveTowPrinterStatusFlagsAndExitSendLoop: ; 843b6 (21:43b6)
|
|
|
|
|
ld a, [rSB]
|
|
|
|
|
ld [wPrinterStatusFlags], a
|
|
|
|
|
xor a
|
|
|
|
|
ld [wPrinterOpcode], a
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Send0x0f: ; 843c0 (21:43c0)
|
|
|
|
|
ld a, $f
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Send0x00_: ; 843c9 (21:43c9)
|
|
|
|
|
ld a, $0
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_Send0x08: ; 843d2 (21:43d2)
|
|
|
|
|
ld a, $8
|
|
|
|
|
call Printer_SerialSend
|
|
|
|
|
call Printer_NextInstruction
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_SerialSend: ; 843db (21:43db)
|
|
|
|
|
ld [rSB], a
|
|
|
|
|
ld a, $1 ; switch to internal clock
|
|
|
|
|
ld [rSC], a
|
|
|
|
|
ld a, $81 ; start transfer
|
|
|
|
|
ld [rSC], a
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
Printer_ReceiveTowPrinterStatusFlagsAndExitSendLoop_: ; 843e6 (21:43e6)
|
|
|
|
|
ld a, [rSB]
|
|
|
|
|
ld [wPrinterStatusFlags], a
|
|
|
|
|
xor a
|
|
|
|
|
ld [wPrinterOpcode], a
|
|
|
|
|
ret
|
