diff options
Diffstat (limited to 'home/serial.asm')
| -rw-r--r-- | home/serial.asm | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/home/serial.asm b/home/serial.asm index 1f0146d9..6c412239 100644 --- a/home/serial.asm +++ b/home/serial.asm @@ -1,4 +1,4 @@ -Serial:: ; 2125 (0:2125) +Serial:: push af push bc push de @@ -52,7 +52,7 @@ Serial:: ; 2125 (0:2125) ; hl = send data ; de = receive data ; bc = length of data -Serial_ExchangeBytes:: ; 216f (0:216f) +Serial_ExchangeBytes:: ld a, 1 ld [hSerialIgnoringInitialData], a .loop @@ -86,84 +86,84 @@ Serial_ExchangeBytes:: ; 216f (0:216f) jr nz, .loop ret -Serial_ExchangeByte:: ; 219a (0:219a) +Serial_ExchangeByte:: xor a ld [hSerialReceivedNewData], a ld a, [hSerialConnectionStatus] cp USING_INTERNAL_CLOCK - jr nz, .asm_21a7 + jr nz, .loop ld a, START_TRANSFER_INTERNAL_CLOCK ld [rSC], a -.asm_21a7 +.loop ld a, [hSerialReceivedNewData] and a - jr nz, .asm_21f1 + jr nz, .ok ld a, [hSerialConnectionStatus] cp USING_EXTERNAL_CLOCK - jr nz, .asm_21cc + jr nz, .doNotIncrementUnknownCounter call IsUnknownCounterZero - jr z, .asm_21cc + jr z, .doNotIncrementUnknownCounter call WaitLoop_15Iterations push hl ld hl, wUnknownSerialCounter + 1 inc [hl] - jr nz, .asm_21c3 + jr nz, .noCarry dec hl inc [hl] -.asm_21c3 +.noCarry pop hl call IsUnknownCounterZero - jr nz, .asm_21a7 + jr nz, .loop jp SetUnknownCounterToFFFF -.asm_21cc +.doNotIncrementUnknownCounter ld a, [rIE] and (1 << SERIAL) | (1 << TIMER) | (1 << LCD_STAT) | (1 << VBLANK) cp (1 << SERIAL) - jr nz, .asm_21a7 + jr nz, .loop ld a, [wUnknownSerialCounter2] dec a ld [wUnknownSerialCounter2], a - jr nz, .asm_21a7 + jr nz, .loop ld a, [wUnknownSerialCounter2 + 1] dec a ld [wUnknownSerialCounter2 + 1], a - jr nz, .asm_21a7 + jr nz, .loop ld a, [hSerialConnectionStatus] cp USING_EXTERNAL_CLOCK - jr z, .asm_21f1 + jr z, .ok ld a, 255 .waitLoop dec a jr nz, .waitLoop -.asm_21f1 +.ok xor a ld [hSerialReceivedNewData], a ld a, [rIE] and (1 << SERIAL) | (1 << TIMER) | (1 << LCD_STAT) | (1 << VBLANK) sub (1 << SERIAL) - jr nz, .asm_2204 + jr nz, .skipReloadingUnknownCounter2 ld [wUnknownSerialCounter2], a ld a, $50 ld [wUnknownSerialCounter2 + 1], a -.asm_2204 +.skipReloadingUnknownCounter2 ld a, [hSerialReceiveData] cp SERIAL_NO_DATA_BYTE ret nz call IsUnknownCounterZero - jr z, .asm_221f + jr z, .done push hl ld hl, wUnknownSerialCounter + 1 ld a, [hl] dec a ld [hld], a inc a - jr nz, .asm_2219 + jr nz, .noBorrow dec [hl] -.asm_2219 +.noBorrow pop hl call IsUnknownCounterZero jr z, SetUnknownCounterToFFFF -.asm_221f +.done ld a, [rIE] and (1 << SERIAL) | (1 << TIMER) | (1 << LCD_STAT) | (1 << VBLANK) cp (1 << SERIAL) @@ -174,14 +174,14 @@ Serial_ExchangeByte:: ; 219a (0:219a) call DelayFrame jp Serial_ExchangeByte -WaitLoop_15Iterations:: ; 2231 (0:2231) +WaitLoop_15Iterations:: ld a, 15 .waitLoop dec a jr nz, .waitLoop ret -IsUnknownCounterZero:: ; 2237 (0:2237) +IsUnknownCounterZero:: push hl ld hl, wUnknownSerialCounter ld a, [hli] @@ -190,7 +190,7 @@ IsUnknownCounterZero:: ; 2237 (0:2237) ret ; a is always 0 when this is called -SetUnknownCounterToFFFF:: ; 223f (0:223f) +SetUnknownCounterToFFFF:: dec a ld [wUnknownSerialCounter], a ld [wUnknownSerialCounter + 1], a @@ -198,7 +198,7 @@ SetUnknownCounterToFFFF:: ; 223f (0:223f) ; This is used to exchange the button press and selected menu item on the link menu. ; The data is sent thrice and read twice to increase reliability. -Serial_ExchangeLinkMenuSelection:: ; 2247 (0:2247) +Serial_ExchangeLinkMenuSelection:: ld hl, wLinkMenuSelectionSendBuffer ld de, wLinkMenuSelectionReceiveBuffer ld c, 2 ; number of bytes to save @@ -223,13 +223,13 @@ Serial_ExchangeLinkMenuSelection:: ; 2247 (0:2247) jr nz, .loop ret -Serial_PrintWaitingTextAndSyncAndExchangeNybble:: ; 226e (0:226e) +Serial_PrintWaitingTextAndSyncAndExchangeNybble:: call SaveScreenTilesToBuffer1 callab PrintWaitingText call Serial_SyncAndExchangeNybble jp LoadScreenTilesFromBuffer1 -Serial_SyncAndExchangeNybble:: ; 227f (0:227f) +Serial_SyncAndExchangeNybble:: ld a, $ff ld [wSerialExchangeNybbleReceiveData], a .loop1 @@ -269,7 +269,7 @@ Serial_SyncAndExchangeNybble:: ; 227f (0:227f) ld [wSerialSyncAndExchangeNybbleReceiveData], a ret -Serial_ExchangeNybble:: ; 22c3 (0:22c3) +Serial_ExchangeNybble:: call .doExchange ld a, [wSerialExchangeNybbleSendData] add $60 @@ -292,7 +292,7 @@ Serial_ExchangeNybble:: ; 22c3 (0:22c3) ld [wSerialExchangeNybbleReceiveData], a ret -Serial_SendZeroByte:: ; 22ed (0:22ed) +Serial_SendZeroByte:: xor a ld [hSerialSendData], a ld a, [hSerialConnectionStatus] @@ -302,7 +302,7 @@ Serial_SendZeroByte:: ; 22ed (0:22ed) ld [rSC], a ret -Serial_TryEstablishingExternallyClockedConnection:: ; 22fa (0:22fa) +Serial_TryEstablishingExternallyClockedConnection:: ld a, ESTABLISH_CONNECTION_WITH_EXTERNAL_CLOCK ld [rSB], a xor a |