CPCRAM
About the CPCRAM PCB
CPCRAM is an open source PCB design by Bread80, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 99.1 × 70.3 mm, with 17 components from 8 distinct parts.
Other key parts include the MC6845, 74LS00, 74LS157 and AS6C4008-55PCN. By type, the board carries 7 ICs, 7 capacitors, 2 jumpers and 1 resistor.
It belongs with the retro computing designs in this gallery.
From the project
Modular Amstrad CPC Compatible Computer (WiP)
***This project is an unfinished work in progress. It currently has bugs and not all the features have been tested!
The current modules are designed to fit a slightly modified RC2014 Pro backplane. In the text below I shall explain the current status of the project, workarounds needed to get it running and basic build details. Due to the work in progress status of the project this document will be intentionaly terse.
Main components on the CPCRAM
CPCRAM bill of materials (BOM)
17 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MC6845 | DIP-40_W15.24mm_Socket | IC108 |
| 1 | 74LS00 | DIP-14_W7.62mm_Socket | IC110 |
| 4 | 74LS157 | DIP-16_W7.62mm_Socket | IC201, IC202, IC203, IC204 |
| 1 | AS6C4008-55PCN | DIP-32_W15.24mm | U191 |
| 1 | CPCM_VideoRAM_EdgeBottom | Edge36_2.54PS | JP2 |
| 1 | CPCM_VideoRAM_EdgeTop | Edge36_2.54PS | JP901 |
| 7 | 0.1uF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R142 |
CPCRAM design files
The KiCad project lives in the Bread80/CPCModular repository on GitHub; these links point at the commit this page was built from.
- LayoutRAM/CPCRAM.kicad_pcb
CPCRAM: common questions
How big is the CPCRAM PCB?
The CPCRAM measures 99.1 × 70.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the CPCRAM?
17 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the CPCRAM design files?
From the Bread80/CPCModular repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the CPCRAM design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which Bread80 chose for the repository.
More boards in CPCModular
Backplane
246.4 × 120.7 mm82 parts2LCERN-OHL-P-2.05
CPCSound
99.1 × 71.1 mm57 parts2LCERN-OHL-P-2.05
CPC-DDI20-OLD
99.3 × 71 mm45 parts2LCERN-OHL-P-2.05
CPC-DDI20
99.1 × 65.9 mm38 parts2LCERN-OHL-P-2.05
CPCIOSound
99.1 × 52.9 mm38 parts2LCERN-OHL-P-2.05
CPCIO
99.1 × 70.3 mm36 parts2LCERN-OHL-P-2.05
CPCVideo
99.1 × 70.3 mm36 parts2LCERN-OHL-P-2.05
CPCROM
99.1 × 66 mm31 parts2LCERN-OHL-P-2.05
CPU
99.1 × 65.9 mm28 parts2LCERN-OHL-P-2.05
CPCRAMCtrl
99.1 × 70.3 mm28 parts2LCERN-OHL-P-2.05
CPCSound - Copy
99.1 × 52.9 mm26 parts2LCERN-OHL-P-2.05
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