2 layers
Encoder
byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
7 parts4.3kMIT
2 layers53.3 × 44.5 mm
CoCoEPROMpak
jimbro1000/CoCoEPROMpak1Updated version of Mark Blair's CoCo Eprom Pak board
- Size
- 53.3 × 44.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 43
- Pads
- 104
- Tracks, vias
- 239, 46
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 24 Nov 2023
- Updated
- 31 Dec 2023
Overview
CoCoEPROMpak is an open-source printed circuit board by jimbro1000, from the jimbro1000/CoCoEPROMpak repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 53.3 × 44.5 mm with 7 parts on 43 nets, routed with 239 tracks and 46 vias.
Its parts include 2 ICs, 1 capacitor and 1 connector.
README
README.mdCoCoEPROMpak 1.0 Copyright 2013 by Mark J. Blair Distributed under GPLv3
CoCoEPROMpak is a PCB design for an EPROM-based ROM cartridge for the Tandy/TRS-80 Color Computer. It can accept on 2732, 2764, 27128, 27256 or 27512 EPROM. Board thickness must be 0.062". Gold plating is preferable to avoid contact oxidation. Board is designed to the OSHpark design rules for a 2-layer PCB.
When using 27256 or larger EPROMs, the EPROM is divided into 2-4 16k banks which can be selected with jumper settings. Jumper settings are also important for 27256 and smaller EPROMs in order to apply the correct power and control signals to the EPROM.
4k: * Install 2732 at U1 * JP2, JP3 not used 8k: * Install 2764 at U2 * Set JP2 to 1 * Set JP3 to 1 16k: * Install 27128 at U2 * Set JP2 to 1 * Set JP3 to 1 32k: * Install 27256 at U2 * Select 16k bank with JP2 * Set JP3 to 1 64k: * Install 27512 at U2 * Select 16k banks with JP2 and JP3
CoCoEPROMpak is a free hardware design: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
CoCoEPROMpak is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with CoCoEPROMpak. If not, see http://www.gnu.org/licenses/.
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | JP3 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP2, JP3 |
| 1 | 0.1u | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 2732 | CoCoEPROMpak:DIL24 | U1 |
| 1 | 27512 | Package_DIP:DIP-28_W15.24mm | U2 |
| 1 | COCO-CART | CoCoEPROMpak:COCO-CART-2.1X1.75 | P1 |
| 1 | JP2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
Questions
How big is the CoCoEPROMpak PCB?
It measures 53.3 × 44.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CoCoEPROMpak use?
7 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the CoCoEPROMpak KiCad files?
From the jimbro1000/CoCoEPROMpak repository on GitHub, at the commit this page was made from: the board is CoCoEPROMpak.kicad_pcb and its schematic CoCoEPROMpak.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CoCoEPROMpak design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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