Mainboard Versions

CPC464 version 1 (original)

• Board: PT NO Z70100, without any "MCnnnn" code, Copyright 1983
• Original version. Big mainboard, old Gate Array (with cooling plate). Real wires going to keyboard.

• Board: PT NO Z70100, MC0001A, Copyright 1983
• Keyboard connector now has two rows of soldering points (maybe intended to allow to use different connectors)

• Board: PT NO 270100, MC0001A, Copyright 1983
• This one is labelled 270100, not Z70100.

CPC464 version 2

• Board: PT NO Z70200, MC0002D, Copyright 1984
• Separate soldering points for old and new Gate Array (with changed pin-outs).
• Fragile plastic wires going to keyboard.

CPC464 version 3 (medium-sized)

• Board: PT NO Z70374, MC0044A
• Medium sized mainboard. Seems to be same as previous version, except that components are arranged more tightly.

• Board: PT NO Z70375, MC0044D

CPC464 version 4 (cost-down)

• Board: PT NO Z80329, MC0099A, Copyright 1988
• Tiny mainboard. Uses 100pin SMD Gate Array (combines the old Gate Array, CRTC, and some FDC/DRAM/RESET logic in one chip).

CPC664

• Board: PT NO Z70205, MC0005A
• 8pin FDC Data Separator

• Board: PT NO Z7020...?, MC000...?
• Another 664 version, spotted only a low-quality picture yet... it does exist and does differ from the Z70205 version... but not sure if I have deciphered the board numbers properly... looks like Z70206, MC0005B or so.
• http://amstrad.cpc.free.fr/amstrad/cpc664_e.htm

CPC6128 version 1

• Board: PT NO Z70210
• 8pin FDC Data Separator

CPC6128 version 2

• Board: PT NO Z70250
• Not sure if this version exists, maybe somebody just misread or mistyped the Z70290 board number (?)

CPC6128 version 3

• Board: PT NO Z70290, MC0020B, R1706-94HB, Copyright 1985
• Can be fitted with Amphenol connectors (done in germany) (instead Edge connectors). Uses 24pin FDC Data Separator.

• Board: PT NO Z70290, MC00201, 94V.0-FR-4, Copyright 1985

• Board: PT NO Z70290, MC0023D, 94HB-R1706, Copyright 1985
• Sold in germany (with Amphenol connectors, and dummy edge-connectors which covered by green solder-stop layer, front of mainboard has several vias for giving better contact to shielding plate).

• Board: PT NO Z70290, MC...?, 94...?
• Looks almost like the above german board, but the "94HB-R1706" is different
• weblink (not very good picture quality; and board numbers are hidden under shielding plate and capacitors)

CPC6128 version 4 (cost-down)

• Board: PT NO Z80330 (1988)
• Uses 100pin SMD Gate Array (combines the old Gate Array and PAL, CRTC, and some FDC/DRAM/RESET logic in one chip).
• Can be fitted with four 64Kx4 RAM chips (or the normal sixteen 64Kx1 RAM chips)
• Printer port consists of 74LS174+74LS175 (instead of 74LS273)

CPC 464+

• Board: 2700-016P-3, MC0122D, Copyright 1990
• Same mainboard is used in 464+ and 664+ (though not all components installed in 464+, and with different LK Links. Uses 160pin SMD Gate Array (ASIC).

CPC 6128+

• Board: 2700-016P-3, MC0122D, Copyright 1990
• Same mainboard is used in 464+, but with additional components installed (extra RAM chips, FDC chips, Floppy connector, and with different LK Links).
• Uses 160pin SMD Gate Array (ASIC).

GX4000

• Board: 2700-017P-4, MC0123C, Copyright 1990
• Same chipset as CPC+, but lacks Keyboard, Expansion Port, Printer Port, Tape/Disc Interfaces.
• Additional Scart Connector and TV Modulator (the modulator isn't installed in all versions, and IC101 may be replaced by 4 transistors, as seen on this other picture).

• Board: 27...?, MC...?, Copyright 1990
• Version without TV Modulator installed, and IC101 may be replaced by 4 transistors.
• See this picture (might be same mainboard as above, not sure - the photo doesn't show the boards part number; hidden behind the cartridge slot, one thing that IS different is the K1 vs K3 text near the LED).

DDI-1

• Board: MF0004B, ISS3
• 20pin FDC Data Separator

• Photo of the above Board: MF0004B, ISS3 (and maybe other ISSues, if any?)

See also

• Amstrad part numbers - Part Numbers for PCBs and Chips
• Schematics
• Service Manuals - (cost-down 6128 is in the Amendment manual)