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2 Mbit Mask ROM used in Commodore and Amiga equipment

IC function

2 Mbit (128k×16) Mask ROM or 2 Mbit (256k×8 / 128k×16) Mask ROM

Related components

4 Mbit Mask ROM, 8 Mbit Mask ROM, 4 Mbit EPROM

Component documentation

IC number	Manufacturer	Documentation
LH5320H4	Sharp	Not available
	NEC	Not available
MX23C2100	Macronix	Datasheet (PDF)

Component versions

IC number	Package
All	40-pin DIP

Programmed components

CBM part number	CBM part description	Chip description
315093-01		Kickstart V1.2
315093-02	ROM, Kickstart V1.3	Kickstart V1.3
390629-01	ROM V2.0 32 bit low word
390629-02	ROM V1.4 32 bit low word
390629-03	IC ROM Kickstart ver 2.04 low	Kickstart V2.04 37.175 (low)
390630-01	ROM V2.0 32 bit high word
390630-02	ROM V1.4 32 bit high word
390630-03	IC ROM Kickstart ver 2.04 high	Kickstart V2.04 37.175 (high)
391513-01	IC, Kickstart ROM (low) 150ns (V39.106)
391513-02		Kickstart V3.0 39.106 (low)
391514-01	IC, Kickstart ROM high) 150ns (V39.106)
391514-02		Kickstart V3.0 39.106 (high)
391523-01	IC, ROM, Kickstart, A1200HD, ROM 0, 40-Pin DIP	Kickstart V3.0 39.106 (low)
391524-01	IC, ROM, Kickstart, A1200HD, ROM 1, 40-Pin DIP	Kickstart V3.0 39.106 (high)
391657-01	IC, 0ROM, 256Kx16, 150nS, Kickstart (high)	Kickstart V3.1 40.70 (high)
391658-01	IC, 1ROM, 256Kx16, 150nS, Kickstart (low)	Kickstart V3.1 40.70 (low)
391773-01		Kickstart V3.1 40.68 (high)
391774-01		Kickstart V3.1 40.68 (low)
391298-01		A570 ROM V2.30

Positions

Device	Positions	Package	Software
A2000	U2	DIP	Kickstart 1.2
A2000CR	U500	DIP	Kickstart 1.3
A500	U6	DIP	Kickstart 1.3
CDTV	U13	DIP	Kickstart 1.3
A3000	U180 (D0..D15), U181 (D16..D31)	DIP	Kickstart 2.0
A3000T	U180 (D0..D15), U181 (D16..D31)	DIP	Kickstart 2.04
A4000	U176 (D0..D15), U175 (D16..D31)	DIP	Kickstart 3.0
A4000T	U176 (D0..D15), U175 (D16..D31)	DIP	Kickstart 3.1
A1200	U6B (D0..D15), U6A (D16..D31)	DIP	Kickstart 3.0
A570	U20	DIP	A570 ROM V2.30

Pinout for 16-bit systems

Pin	Type	Name	Signal name
			A2000	A2000CR, A500 Rev 5	A500 Rev 6A/7	CDTV	A570
1 (×16)	NC	NC	unused		A18
1 (×8/×16)	NC	NC
2..9	Input	A7..A0	A8..A1
10	Input	_CS	PR/_W via U14	GND			connected to SW1 and R29
11	Power	VSS	GND
12	Input	_OE	_ROME	_ROMEN		_ROMEN and EMC via U23	*CSROM
13	Output	D0	PD0	D0
14	Output	D8	PD8	D8
15	Output	D1	PD1	D1
16	Output	D9	PD9	D9
17	Output	D2	PD2	D2
18	Output	D10	PD10	D10
19	Output	D3	PD3	D3
20	Output	D11	PD11	D11
21	Power	VCC	+5V		VCC
22	Output	D4	PD4	D4
23	Output	D12	PD12	D12
24	Output	D5	PD5	D5
25	Output	D13	PD13	D13
26	Output	D6	PD6	D6
27	Output	D14	PD14	D14
28	Output	D7	PD7	D7
29	Output	D15	PD15	D15
30	Power	VSS	GND
31 (×16)	NC		A18		VCC
31 (×8/×16)	Input	WORD/_BYTE
32..40	Input	A16..A8	A17..A9

• To install a 512kb (×8/×16) Kickstart in a socket pinout designed for ×16 only, a connection must be made between pins 1 and 31.

Pinout for 32-bit systems

Pin	Type	Name	Signal name
			A3000, A3000T, A4000, A4000T	A1200
1	NC		A19	A19 via R599
2..9	Input	A7..A0	A9..A2
10	Input	_CS	GND	_ROMEN
11	Power	GND	GND
12	Input	_OE	_ROMEN	_OE
13	Output	D0	D0 / D16
14	Output	D8	D8 / D24
15	Output	D1	D1 / D17
16	Output	D9	D9 / D25
17	Output	D2	D2 / D18
18	Output	D10	D10 / D26
19	Output	D3	D3 / D19
20	Output	D11	D11 / D27
21	Power	VCC	+5V	VCC
22	Output	D4	D4 / D20
23	Output	D12	D12 / D28
24	Output	D5	D5 / D21
25	Output	D13	D13 / D29
26	Output	D6	D6 / D22
27	Output	D14	D14 / D30
28	Output	D7	D7 / D23
29	Output	D15	D15 / D31
30	Power	VSS	GND
31	Input	WORD/_BYTE	+5V	VCC
32..40	Input	A16..A8	A18..A10

• The A1200 has 42-pin sockets. To get the socket pin number, add 1 to the numbers from the table.

Copyright © 2002-2005 Ronald van Dijk - All rights reserved
Last update: 10 September 2005