IC name:	6500/1 (6570, 6571)
IC function:	8-bit microcontroller
Related components:	6502 (same processor core), 68HC05 (keyboard processor used in A1200)

Component documentation

IC number	Manufacturer	Documentation
6500/1 (6570, 6571)	MOS Technology / CSG	CSG Product guide

Programmed components

IC number	Package	CBM part number	CBM part description	Part description
	40-Pin DIP	252609-02	CPU 6500/1	Remote control input converter
6570-33	40-Pin DIP	328191-01		Keyboard processor (A1000)
6570-36	40-Pin DIP	328191-02		Keyboard processor (A500, A3000)
6571R6PD	40-Pin DIP	315107-01		Keyboard processor (CD-1221)
6571R4PL	44-Pin PLCC	391079-01	6571R4 KEYBD UP 44PIN PLCC	Keyboard processor (A600)
6571R6PL	44-Pin PLCC	391079-01		Keyboard processor (A600)
	40-Pin DIP	325340-01	IC MPS 6500/1	Plotter main processor

Positions

Device	Position	Component	Package
CDTV	U75	252609-02	DIP
A600	U13	6571	PLCC
A1000 keyboard PCB		6570-33	DIP
A500 keyboard PCB	IC1	6570-36	DIP
A3000 keyboard PCB		6570-36	DIP
CD-1221		6571	DIP
VIC-1520	U1	325340-01	DIP

DIP package pinout

Pin	Type	Name	Signal name
			CDTV	A1000 keyboard PCB	A500 keyboard PCB	VIC-1520
1	Power	VRR	+5VD	+5V	+5V via FB3	VCC
2	I/O	PD7	unused		connected to pin 1 of 74LS123	connected to pin 8 of U4
3	I/O	PD6	POT0X	connected to keyboard matrix		connected to pin 7 of U4
4	I/O	PD5	POT0Y	connected to keyboard matrix		connected to pin 6 of U4
5	I/O	PD4	FIRE0	connected to keyboard matrix		connected to pin 5 of U4
6	I/O	PD3	XB1	connected to keyboard matrix		connected to pin 4 of U4
7	I/O	PD2	YA1	connected to keyboard matrix		connected to pin 3 of U4
8	I/O	PD1	XA1	connected to keyboard matrix		connected to pin 2 of U4
9	I/O	PD0	YB1	connected to keyboard matrix		connected to pin 1 of U4
10	Input	XTI	connected to X3	connected to crystal		connected to Y1
11	Output	XTO
12	Power	GND	GND
13	I/O	PC7	unused	connected to keyboard matrix		connected to pin 2 of P4
14	I/O	PC6	POT1X	connected to keyboard matrix		unused
15	I/O	PC5	POT1Y	connected to keyboard matrix		unused
16	I/O	PC4	FIRE1	connected to keyboard matrix		unused
17	I/O	PC3	XB2	connected to keyboard matrix		unused
18	I/O	PC2	YA2	connected to keyboard matrix		unused
19	I/O	PC1	XA2	connected to keyboard matrix		_UP
20	I/O	PC0	YB2	connected to keyboard matrix		_DN
21	I/O	CNTR	unused		GND	unused
22	I/O	PB7	CPCP3	connected to Caps Lock LED		connected to pin 5 of P3
23	I/O	PB6	CPCP2	connected to left Amiga key		connected to pin 4 of P3
24	I/O	PB5	CPCP1	connected to left alt key		connected to pin 3 of P3
25	I/O	PB4	CPCP0	connected to left shift key		connected to pin 11 of U2
26	I/O	PB3	AUS2	connected to ctrl key		unused
27	I/O	PB2	_KBSE	connected to right Amiga key		connected to E3
28	I/O	PB1	AUS1	connected to right alt key		connected to E2
29	I/O	PB0	AUS0	connected to right shift key		connected to E1
30	Power	VCC	+5VD	+5V	+5V via FB3	VCC
31	I/O	PA7	unused	connected to keyboard matrix		_DATA_IN
32	I/O	PA6	unused	connected to keyboard matrix		NRFD
33	I/O	PA5	unused	connected to keyboard matrix		ATTN_ACK
34	I/O	PA4	unused	connected to keyboard matrix		unused
35	I/O	PA3	PRDT	connected to keyboard matrix		unused
36	I/O	PA2	_KBCLOCK	connected to keyboard matrix		unused
37	I/O	PA1	_KBDATA	KDAT	KCLK via FB1	_CLK
38	I/O	PA0	IRDT	KCLK	KDAT via FB2	ATTN
39	Input	_RES	connected to pin 2 of U58	connected to pin 9 of NE556	connected to pin 8 of 74LS27	connected to pin 12 of U2
40	Input	_NMI	_CRW	+5V	+5V via FB3	VCC (via RM1-3)

PLCC package pinout

Pin	Type	Name	Signal name
			A600
1	Power	VRR	VCC
2	I/O	PD7	unused
3	I/O	PD6	connected to pin 15 of CN13
4	I/O	PD5	connected to pin 16 of CN13
5	N/C	NC	unused
6	I/O	PD4	connected to pin 17 of CN13
7	I/O	PD3	connected to pin 18 of CN13
8	I/O	PD2	connected to pin 19 of CN13
9	I/O	PD1	connected to pin 20 of CN13
10	I/O	PD0	connected to pin 21 of CN13
11	Input	XTI	connected to Y621
12	Output	XTO
13	Power	GND	GND
14	I/O	PC7	connected to pin 22 of CN13
15	I/O	PC6	connected to pin 23 of CN13
16	I/O	PC5	connected to pin 24 of CN13
17	N/C	NC	unused
18	I/O	PC4	connected to pin 25 of CN13
19	I/O	PC3	connected to pin 26 of CN13
20	I/O	PC2	connected to pin 27 of CN13
21	I/O	PC1	connected to pin 28 of CN13
22	I/O	PC0	connected to pin 29 of CN13
23	N/C	NC	unused
24	I/O	CNTR	VCC
25	I/O	PB7	connected to pin 4 of CN13 via R621, Q621 and R622
26	I/O	PB6	connected to pin 14 of CN13
27	I/O	PB5	connected to pin 13 of CN13
28	I/O	PB4	connected to pin 12 of CN13
29	I/O	PB3	connected to pin 11 of CN13
30	I/O	PB2	connected to pin 10 of CN13
31	I/O	PB1	connected to pin 8 of CN13
32	I/O	PB0	connected to pin 6 of CN13
33	Power	VCC	VCC
34	I/O	PA7	unused
35	I/O	PA6	connected to pin 7 of CN13 and pin 2 of U36
36	I/O	PA5	connected to pin 5 of CN13
37	I/O	PA4	connected to pin 3 of CN13
38	I/O	PA3	connected to pin 2 of CN13 and pin 1 of U36
39	N/C	NC	unused
40	I/O	PA2	connected to pin 1 of CN13 and pin 13 of U36
41	I/O	PA1	_KB_CLOCK
42	I/O	PA0	_KB_DATA
43	Input	_RES	_RST
44	Input	_NMI	VCC