*671-9408078 => Thailand Factory 71 - April 1989 (it's a 6128)
=PCB Markings=
There are some markings on some boards that denote the materials used to build the board or adherence to certain standards.
==UL94 Flammability testing standard==
The standard determines the material’s tendency to either extinguish or spread the flame once the specimen has been ignited.
Classifications from lowest (Least flame-retardant) to highest (Most flame-retardant):
* HB: slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm or burning stops before 100 mm
* V-2: burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed.
* V-1: burning stops within 30 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed.
* V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed.
* 5VB: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may develop a hole.
* 5VA: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole.
So, a board with a 94V-0 marking is supposed to stop burning after 10 seconds and may drip non-inflamed particles.
Please visit the [https://en.wikipedia.org/wiki/UL_94 Wikipedia page] on the UL94 standard for more information.
==NEMA grade designations==
[https://www.nema.org NEMA (National Electrical Manufacturers Association)] is the largest trade association of electrical equipment manufacturers in the United States, and publishes standards for electrical products.
One of these standards is the Insulating Material Standard, which includes designation for flame retardant materials (FR), like the ones the PCBs are made of.
Examples of NEMA designations include the following:
* FR-2 : Synthetic resin bonded paper. ([https://en.wikipedia.org/wiki/FR-2 Wikipedia FR-2])
* FR-4 : Glass-reinforced epoxy laminate material, typically employing bromine as flame retardant. ([https://en.wikipedia.org/wiki/FR-4 Wikipedia FR-4])
For information on the different substrates used in PCB manufacturing, please check this [https://en.wikipedia.org/wiki/Printed_circuit_board#Common_substrates Wikipedia page].
==Material codes==
There are other codes referring also to materials and their properties, please check the table below:
[[File:UL_Material_Standards.png|600px]]
==Other markings==
There are some boards which have some combinations of letters and numbers surrounded by white dot patterns:
[[File:PCB_White_Dot_Marking.png]]
These may be production line identification markings for quality control.
=Boards=
== CPC464 version 0 Prototype ==
{|{{Prettytable|width: 700px; font-size: 2em;}}
|''PCB Top'' ||''PCB Bottom'' || ''Composite (or X-Ray) view'' || Description
|-
|[[File:CPC464_V0_PCB_Top.jpg|200px]] || [[File:CPC464_V0_PCB_Bottom.jpg|200px]] || [[File:CPC464_V0_PCB_Composite_View.jpg|200px]] || '''Board: Version 0 Prototype'''<br>This board is the original prototype of the CPC and has a 6502 processor instead of the Z80.<br>Courtesy of Roland Perry. Original pictures by Deepfb.
|-
|}
== CPC464 Prototype ==
|-
|[[File:GA motherboard.JPG|200px]] || || '''Board: Prototype with Gate Array Simulator''' ([[CPC Prototypes|more pictures]])<br>The Gate Array Simulator board (mounted on top of the mainboard, and almost having the same size as the mainboard) contains four 8K EPROMs, and a Gate Array prototype made of several logic chips.<br>In later versions these evolved into a normal 28pin 32K ROM chip, and the custom 40pin Gate Array chip.
|-
|[[File:CPC464_Prototype_Z70100_PCB_Top.jpg|200px]] || [[File:CPC464_Prototype_Z70100_PCB_Bottom.jpg|200px]] || '''Board: PT NO Z70100 Prototype'''<br>Board found along the Gate Array simulator on the "Grey Amstrad" prototype machine.<br>Pictures courtesy of Jorge Selfa.
|-
|[[File:GateArraySimulator_13006-7_PCB_Top.jpg|200px]] || [[File:GateArraySimulator_13006-7_PCB_Bottom.jpg|200px]] || '''Board: Gate Array Simulator 13006/7'''<br>Pictures courtesy of Jorge Selfa.
|-
|}
|-
|[[File:Amstrad_CPC464_Z70200_MC0003A_PCB_Top.jpg|200px]] || [[File:Amstrad_CPC464_Z70200_MC0003A_PCB_Bottom.jpg|200px]] || '''Board: PT NO Z70200, MC0003A, Copyright 1984'''<br>English board with original 'Tall Key' keyboard connector only.<br>[[Media:Amstrad_CPC464_MC0003A_mainboard.jpg|Picture from an eBay UK CPC464 for sale ad.]]
|-
|[[File:MC0008B-M2-Schneider464-K31-57_Willow3411.jpg|200px]] || || '''Board: PT NO Z70200, MC0008B, Copyright 1984'''<br>Schneider board with shielding plates, and additional filtering loops.<br>Without old 19pin keyboard connector.<br>Picture courtesy of Willow3411.
|-
|[[File:CPC464_Z70200_MC0008C_PCB_Top.jpg|200px]] || [[File:CPC464_Z70200_MC0008C_PCB_Bottom.jpg|200px]] || '''Board: PT NO Z70200, MC0008C, Copyright 1984'''<br>Schneider board with shielding plates, and additional filtering loops.<br>Without old 19pin keyboard connector.<br> [[Media:CPC464_PCB_Top_(Z70200_MC0008C).jpg|Another picture]].
|-
|[[File:Nightfallcrew CPC464 french azerty Z70200 MC0008D pcbMC0008D_Z70200_LeZone_PCB_Top.jpg|200px|left]] || [[File:MC0008D_Z70200_LeZone_PCB_Bottom.jpg|200px]] || '''Board: PT NO Z70200, MC0008D, Copyright 1984'''<br>French board with shielding plates, and additional filtering loops, and French AZERTY ROM.<br>Without old 19pin keyboard connector.<br>[[Media:Nightfallcrew CPC464 french azerty Z70200 MC0008D pcb.jpg|Another picture.]]
|-
|}
|[[File:AmstradCPC464_Z70375_MC0044D_GA40010_PCB_Top.jpg|120px]] || [[File:AmstradCPC464_Z70375_MC0044D_GA40010_PCB_Bottom.jpg|120px]] || '''Board: PT NO Z70375, MC0044D'''<br>Same board as above but with a 40010 Gate Array.<br>Note that this board has been repaired.
|-
|[[File:CPC464_PCB_Top_(Z70378_MC0046A)_4007GA464-MC0046A-GA40007.JPGjpg|120px]] || ||'''Board: PT NO Z70378, MC0046A'''<br>Additional filtering loops near cassette, monitor, keyboard connectors. Used in German Schneider models.<br>[[Media:CPC464_PCB_Top_(Z70378_MC0046A)_4007GA.JPG|Another picture]].
|-
|[[File:CPC464 PCB Top (Z70378 MC0046A).jpg|120px]] ||[[File:CPC464_PCB_Bottom_(Z70378_MC0046A).jpg|120px]] || '''Board: PT NO Z70378, MC0046A'''<br>Same board as above but with a 40010 Gate Array. Additional filtering loops near cassette, monitor, keyboard connectors.<br>Used in German Schneider models.[[Media:CPC464 MC0046A Markus top.jpg| Another picture]]
|-
|[[Image:CPC464_PCB_Top_(Z80329_MC0099A).jpg|120px]] || [[Image:CPC464_PCB_Bottom_(Z80329_MC0099A).jpg|120px]] || '''Board: PT NO Z80329, MC0099A, Copyright 1988'''<br>Tiny mainboard. Uses 100pin SMD Gate Array (combines the old Gate Array, CRTC, and some FDC/DRAM/RESET logic in one chip).<br>Here is [[Media:CPC464 MC0099A.jpg|another picture]].
|-
|[[Image:Amstrad_CPC464_MC0099A_2x41464_Ram_PCB_Top_LeZone.jpg|120px]] || || '''Board: PT NO Z80329, MC0099A, Copyright 1988'''<br>MC0099A board fitted with 2x41464 (64Kx4 bits) chips instead of 8x4164 (64Kx1 bit) chips.
|-
|}
|''PCB Top'' ||''PCB Bottom'' || Description
|-
|[[File:CPC6128_PCB_Top_(Z70210_MC0009A).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z70210_MC0009A).jpg|160px]] || '''Board: PT NO Z70210, MC0009A'''<br>Separate soldering points for old and new Gate Array (as far as known, the old Gate Array was never used in 6128 though, only in 464).<br>8pin FDC Data Separator.<br>Can be fitted with Amphenol connectors (as used in German CPCs) (instead of edge connectors).<br>Here's [[Media:CPC6128 Z70210 Tomdalby.jpg|another picture]].|-|[[File:PCB70210german.jpg|160px]] || || '''Board: PT NO Z70210, MC0009A Centronics Version'''<br>Separate soldering points for old and new Gate Array.
|-
|[[File:MC0009B_Top.jpg|160px]] || [[File:MC0009B_Bottom.jpg|160px]] || '''Board: PT NO Z70210, MC0009B'''<br>Separate soldering points for old and new Gate Array.
|[[File:CPC6128_PCB_Top_(Z70210_MC0009C).jpg|160px]]||[[File:CPC6128_PCB_Bottom_(Z70210_MC0009C).jpg|160px]]|| '''Board: PT NO Z70210, MC0009C'''<br>Separate soldering points for old and new Gate Array.
|-
|[[File:CPC6128_PCB_Top_(Z70210_MC0012A).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z70210_MC0012A).jpg|160px]] || '''Board: PT NO Z70210, MC0012A Centronics Version'''<br>Separate soldering points for old and new Gate Array.<br>Here's [[Media:PCB70210german.jpg|Another picture]].
|-
|[[File:CPC6128_PCB_Top_(Z70210_MC0012B).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z70210_MC0012B).jpg|160px]] || '''Board: PT NO Z70210, MC0012B Centronics Version'''<br>Separate soldering points for old and new Gate Array.
|-
|[[File:CPC6128_MC0016A_PCB_Top_Noel_Llopis.jpg|160px]] || [[File:CPC6128_MC0016A_PCB_Bottom_Noel_Llopis.jpg|160px]] || '''Board: PT NO Z70270, MC0016A Centronics Version'''<br>Separate soldering points for old and new Gate Array.<br>Courtesy of Noel Llopis.
|}
|-
|[[File:CPC6128_PCB_Top_(Z70290_MC0023D).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z70290_MC0023D).jpg|160px]] || '''Board: PT NO Z70290, MC0023D, 94HB-R1706, Copyright 1985'''<br>Sold in Germany, with Amphenol connectors, front of mainboard has several vias for giving better contact to shielding plate). The via in the text makes it easy to misread the part number (it's Z70290, not Z70250).<br>More pictures [[Media:NightfallcrewSchneider6128pcb.jpg|here]] and [[Media:NightfallcrewSchneider6128pcb bottom.jpg|here]].
|-
|[[File:Amstrad_CPC6128_MC0023F_LeZone_PCB_Top.jpg|160px]] || [[File:Amstrad_CPC6128_MC0023F_LeZone_PCB_Bottom.jpg|160px]] || '''Board: PT NO Z70290, MC0023F, 94HB-R1706, Copyright 1985'''<br>[[Media:Amstrad_CPC6128_MC0023F_LeZone_MC_Code_Detail.jpg|Detail shot of the MC code]].
|-
|[[File:CPC6128_PCB_Top_(Z70290_MC0023G).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z70290_MC0023G).jpg|160px]] || '''Board: PT NO Z70290, MC0023G, 94HB-R1706, Copyright 1985'''<br>Fitted with Amphenol connectors, and with an English ROM.
|''PCB Top'' ||''PCB Bottom'' || Description
|-
|[[File:CPC6128_PCB_Top_(Z80330_MC0100A).jpg|160px]] || [[File:CPC6128_PCB_Bottom_(Z80330_MC0100A).jpg|160px]] || '''Board: PT NO Z80330, MC0100A (1988)'''<br>Uses 100pin SMD Gate Array (combines the old Gate Array and PAL, CRTC, and some FDC/DRAM/RESET logic in one chip).<br>Can be fitted with four 64Kx4 RAM chips (or the normal sixteen 64Kx1 RAM chips)<br>Printer port consists of 74LS174+74LS175 (instead of 74LS273)<br>More pictures [[Media:CPC6128 Z80330 Yarek.jpg|another picturehere]] and [[Media:CPC6128_PCB_Top_(Z80330_MC0100A)_VincentGR.jpg|here]].
|-
|}
|-
|[[File:GX4000_PCB_Top_(2700-017P-3_MC0123A_K2).jpg|100px]] || [[File:GX4000_PCB_Bottom_(2700-017P-3_MC0123A_K2).jpg|100px]] || '''Board: 2700-017P-3, MC0123A, Copyright 1990, K2'''
|-
|[[File:GX4000_PCB_Top_(2700-017P-3_MC0123A_K2)_NoMod.jpg|100px]] || [[File:GX4000_PCB_Bottom_(2700-017P-3_MC0123A_K2)_NoMod_.jpg|100px]] || '''Board: 2700-017P-3, MC0123A, Copyright 1990, K2'''<br>Same as above, but without modulator.
|-
|[[File:GX4000_PCB_Top_(2700-017P-3_MC0123B_K3).jpg|100px]] || [[File:GX4000_PCB_Bottom_(2700-017P-3_MC0123B_K3).jpg|100px]] || '''Board: 2700-017P-3, MC0123B, Copyright 1990, K3'''<br>R153 installed (near SCART connector)<br>handmade NR2 (between CPU and PSG)<br>Here is [[Media:Terje GX4000-MC0123B-K3.jpg|another picture]].
|-
|[[File:GX4000_PCB_Top_(2700-017P-4_MC0123C_K4).jpg|100px]] || [[File:GX4000_PCB_Bottom_(2700-017P-4_MC0123C_K4).jpg|100px]] || '''Board: 2700-017P-4, MC0123C, Copyright 1990, K4'''<br>The same board as the above one, but without the modulator.
|-
|[[File:GX4000 mainboard version MC0123D 2019-05-19 01-33.jpg|100px]] || || '''Board: 2700-017P-5, MC0123D, Copyright 1990, K2'''
|-
|[[File:Cpcmania GX4000 without modulator.jpg|100px]] || || '''Board: 27...?, MC...?, Copyright 1990, K3''' (without TV modulator)<br>Version without TV Modulator installed, and with IC101 replaced by 4 transistors (used in French models; where the PAL modulator would be useless).