CPU Pins

Pin	F1	F2	Level	Remarks
1-27	A1-A23		High	A1-A20 connected, A21-A23 not used
30-48	D15-D1		High	All connected
49	/CTS3	SPRXD	High	Not used
50	/CD1	L1SY1	High	Not used
51	/CTS1	L1GR	High	Not used
52	RXD1	L1RXD	High	RXD1 Midi & Keyboard Data Bus
53	RXD2	PA0	High	RXD2 Midi & Keyboard Data Bus
54	TXD2	PA1	Float	TXD2 Midi & Keyboard Data Bus
55	RCLK2	PA2	Float	Clock Calendar SCLK
56	TLCK2	PA3	Float	Clock Calendar I/O
58	/CTS2	PA4	High	EEPROM CS
59	/RTS2	PA5	High	EEPROM SK
60	/CD2	PA6	High	EEPROM Data In
61	SDS2	PA7	High	EEPROM Data Out
63	RXD3	PA8	N.C.
64	TXD3	PA9	N.C.
65	RCLK3	PA10	Float	RES
66	TCLK3	PA11	High	DREV
68		PA12	Float	Clock Calendar RST
69	/DREQ	PA13	High	Floppy Controller DMA
70	/DACK	PA14	High	Floppy Controller DACK
71	/DONE	PA15	High	Floppy Controller TC
72	/FRZ		High	Not used
73	DISCPU		High	Not used
74	BUSW		High	Not used
77	/CD3	SPCLK	High	GREV
78	/RTS3	SPTXD	N.C.
79	/RTS1	L1RQ	N.C.
80	TXD1	L1TXD	Float	TXD1 Midi & Keyboard Data Bus
81	TCLK1	L1SY0	N.C.
82	RCLK1	L1CLK	N.C.
85	/DTACK		High	/DTACK
86	/BCLR		High	Not used
87	/BG		High	Not used
88	/BGACK		High	Not used
90	/BR		High	Not used
91	/HALT		High	Power-on circuit
92	/RESET		High	Power-on circuit
93	/AVEC	/IOUT0	High	Not used
94	/BERR		High	Not used
95	/IPL2	/IRQ7	High	Not used
96	/IPL1	/IRQ6	High	Not used
97	/IPL0	/IRQ1	High	Not used
98	CLK0		Float	CLK0, Floppy, RAM
100	EXTAL		Low	16 MHz System Clock
101	XTAL		Low	16 MHz System Clock
103	R//W		High	/WR,/RD Floppy Controller
104	/AS		High	/AS RAM, Floppy Controller
105	/LDS	/DS	High	/LDS
106	/UDS	A0	High	/UDS
108	/IACK7	PB0	Float	IC45 B7 -> ACK
109	/IACK6	PB1	Float	D1,D2 Midi & Keyboard Data Bus
110	/IACK1	PB2	Float	IC57-B Q -> A/D1 A/D2
111	TIN1	PB3	Float	YSC LCD Controller Data Bus
113	/TOUT1	PB4	N.C.
114	TIN2	PB5	Float	SYNR
115	/TOU2	PB6	N.C.
117	/WDOG	PB7	High	VLCO LCD Controller Data Bus
118		PB8	High	Floppy Controller IRQ
119		PB9	High	/DAV
120		PB10	High	IC9-A Q -> A/D1 A/D2
121		PB11	High	INT
122	IAC		N.C.
123	/RMC	/IOUT1	N.C.
124	/CS3		Float	/CS3
125	/CS2		Float	/CS2
127	/CS1		Float	/CS1 RAM
128	/CS0	/IOUT2	Float	/CS0 ROM
129	FC2		High	Not used
130	FC1		High	Not used
132	FC0		High	Not used