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Last update: 10 January 2004

IC function:4 Mbit (128k×16 / 256k×8) EPROM
Related components:4 Mbit Mask ROM (pin compatible Mask ROM), 2 Mbit Mask ROM (used in newer A570)

Component documentation
IC numberManufacturerDocumentation
27C400IntelNot available
µPD27C4000NECNot available

Component versions
IC numberPackage
D27C40040-pin Ceramic DIP
µPD27C4000D40-pin Ceramic DIP

Programmed components
CBM part numberCBM part descriptionPart description
391298-01A570 / A690 ROM V1.0

Positions
AmigaPositionPackage
A570 / A690U20DIP

Pinout
Socket pinROM pinTypeNameSignal name
A570 / A690
1(A18)A19
21InputA17A18
3..102..9InputA7..A0A8..A1
1110Input_CSconnected to SW1 and R29
1211PowerGNDGND
1312Input_OE*CSROM
1413OutputD0D0
1514OutputD8D8
1615OutputD1D1
1716OutputD9D9
1817OutputD2D2
1918OutputD10D10
2019OutputD3D3
2120OutputD11D11
2221PowerVCCVCC
2322OutputD4D4
2423OutputD12D12
2524OutputD5D5
2625OutputD13D13
2726OutputD6D6
2827OutputD14D14
2928OutputD7D7
3029OutputD15D15
3130PowerVSSGND
3231Input_BYTEVCC
33..4132..40InputA16..A8A17..A9
42(NC)unused

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