Rc-640k
About the Rc-640k PCB
Rc-640k is an open source PCB design by PickledDog, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 99.1 × 49.9 mm, with 11 components from 7 distinct parts.
Other key parts include the SST39SF040, AS6C1008, 74HCT688, 74HCT174 and 74HCT32. By type, the board carries 5 ICs, 5 capacitors and 1 connector.
It belongs with the retro computing designs in this gallery.
From the project
128K+512K RAM/ROM card for RC2014
The port address and layout are chosen to be (mostly) compatible with the RetroBrew SBC. The SBC has separate ROM and RAM registers (on 0x78 and 0x7C); this board uses a single register for both, which can be written to from either address.
But most importantly, this board is compatible with RomWBW, providing several CP/M versions, ROM applications, and maximized free application memory. It will need to be built from source with configuration changes, although this is fairly straightforward (RomWBW includes its entire build toolchain in the source tree). The build process is covered in this…
Main components on the Rc-640k
Rc-640k bill of materials (BOM)
11 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SST39SF040 | DIP-32_W15.24mm_LongPads | U1 |
| 1 | AS6C1008 | DIP-32_W15.24mm_LongPads | U2 |
| 1 | 74HCT688 | DIP-20_W7.62mm_LongPads | U3 |
| 1 | 74HCT174 | DIP-16_W7.62mm_LongPads | U4 |
| 1 | 74HCT32 | DIP-14_W7.62mm_LongPads | U5 |
| 1 | RC2014 | PinHeader_1x39_P2.54mm_Vertical | J1 |
| 5 | 0.1uF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C3, C4, C5 |
Rc-640k design files
The KiCad project lives in the PickledDog/rc-640k repository on GitHub; these links point at the commit this page was built from.
- Layoutrc-640k.kicad_pcb
Rc-640k: common questions
How big is the Rc-640k PCB?
The Rc-640k measures 99.1 × 49.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Rc-640k?
11 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Rc-640k design files?
From the PickledDog/rc-640k repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Rc-640k design in my own project?
Yes, under the terms of its Apache-2.0 license, which PickledDog chose for the repository.
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