Z80 Serial In/out

Z 80 SIO/0	Pin	Use	Pin	Use	Pin	Use	Pin	Use
	1	D1	11	*SYNC A	21	*RESET	31	GND
	2	D3	12	RxDA	22	*DCDB	32	*RD
	3	D5	13	*RxCA	23	*CTSB	33	C/*D
	4	D7	14	*TxCA	24	*RTSB	34	B/*A
	5	*INT	15	TxDA	25	*DTRB	35	*CE
	6	IEI	16	*DTRA	26	TxDB	36	*IORQ
	7	IEO	17	*RTSA	27	*RxTxCB	37	D6
	8	*M1	18	*CTSA	28	RxDB	38	D4
	9	+ 5V	19	*DCDA	29	*SYNCB	39	D2
	10	*W/RDYA	20	CLOCK	30	*W/RDYB	40	D0

Z 80 SIO/1	Pin	Use	Pin	Use	Pin	Use	Pin	Use
	1	D1	11	*SYNC A	21	*RESET	31	GND
	2	D3	12	RxDA	22	*DCDB	32	*RD
	3	D5	13	*RxCA	23	*CTSB	33	C/*D
	4	D7	14	*TxCA	24	*RTSB	34	B/*A
	5	*INT	15	TxDA	25	TxDB	35	*CE
	6	IEI	16	*DTRA	26	TxCB	36	*IORQ
	7	IEO	17	*RTSA	27	*RxCB	37	D6
	8	*M1	18	*CTSA	28	RxDB	38	D4
	9	+ 5V	19	*DCDA	29	*SYNCB	39	D2
	10	*W/RDYA	20	CLOCK	30	*W/RDYB	40	D0

Z 80 SIO/2	Pin	Use	Pin	Use	Pin	Use	Pin	Use
	1	D1	11	*SYNC A	21	*RESET	31	GND
	2	D3	12	RxDA	22	*DCDB	32	*RD
	3	D5	13	*RxCA	23	*CTSB	33	C/*D
	4	D7	14	*TxCA	24	*RTSB	34	B/*A
	5	*INT	15	TxDA	25	*DTRB	35	*CE
	6	IEI	16	*DTRA	26	TxDB	36	*IORQ
	7	IEO	17	*RTSA	27	*TxCB	37	D6
	8	*M1	18	*CTSA	28	*RxCB	38	D4
	9	+ 5V	19	*DCDA	29	RxDB	39	D2
	10	*W/RDYA	20	CLOCK	30	*W/RDYB	40	D0