First Commit

Upload literally everything from the pokecrystal16 expand-move-ID branch

home/printer.asm

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+PrinterReceive::
+	homecall _PrinterReceive
+	ret
+
+AskSerial::
+; send out a handshake while serial int is off
+	ld a, [wPrinterConnectionOpen]
+	bit 0, a
+	ret z
+
+; if we're still interpreting data, don't try to receive
+	ld a, [wPrinterOpcode]
+	and a
+	ret nz
+
+; once every 6 frames
+	ld hl, wHandshakeFrameDelay
+	inc [hl]
+	ld a, [hl]
+	cp 6
+	ret c
+
+	xor a
+	ld [hl], a
+
+	ld a, $0c
+	ld [wPrinterOpcode], a
+
+; handshake
+	ld a, $88
+	ldh [rSB], a
+
+; switch to internal clock
+	ld a, (0 << rSC_ON) | (1 << rSC_CLOCK)
+	ldh [rSC], a
+
+; start transfer
+	ld a, (1 << rSC_ON) | (1 << rSC_CLOCK)
+	ldh [rSC], a
+
+	ret