Tandy CoCo EPROM Cartridge
This pcb was designed by Mark J. Blair under GPLv3 License
Blog: https://www.nf6x.net/2013/10/cocoeprompak/
It allows the use of EPROMS with the Tandy TRS-80 Color Computer cartridge expansion port.
2732 through 27256 EPROMS can be programmed with CoCo software and then used with the CoCo like normal cartridges.
Refer to the project blog for details on how to use the pcb, including setting jumpers and using the appropriate EPROM footprint on the PCB.
Two footprints overlap each other and only one can be used per pcb.
Since the component count is so small and I expect this pcb to be hand assembled with each person's special requirements, no BOM has been provided here.
Another person designed a 3D printed cartridge shell for this pcb, available on Thingiverse
https://www.thingiverse.com/thing:2536842
Tandy CoCo EPROM Cartridge
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.

Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen(Without Speaker)
BUY NOW
ESP32-S3 4.3inch Capacitive Touch Display Development Board, 800×480, 5-point Touch, 32-bit LX7 Dual-core Processor
BUY NOW
Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen(Without Speaker)
BUY NOW- Comments(0)
- Likes(7)

-
Jeremy Harton Jan 14,2025
-
Juan VM Nov 21,2024
-
Theo Niemeijer Jun 05,2024
-
Francisco Meza Dec 26,2023
-
Dario Loy Oct 15,2023
-
Jessica L Petersen Sep 19,2023
-
(DIY) C64iSTANBUL Apr 24,2023
- 0 USER VOTES
- YOUR VOTE 0.00 0.00
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
More by Gadget Reboot
-
Dsub 9 pin breakout pcb DE9 DE9 Dsub 9 pin breakout boardHas headers for all 9 pins to easily connect Dupont wires or plug into ...
-
8 LED Scanner Back and Forth 4017 8 LEDs scan back and forth with a 555 clock and two 4017 counters.To simulate the way the lights use...
-
JFET Matching Circuit JFET Matching PCBUsed with a multimeter to read VGS on a JFET so that it acts like a 10K resistor.eg...
-
THS7316 Video Buffer and Op Amp Audio Buffer Breakout Board This pcb is intended for prototyping video circuits.It has a 3 channel video buffer THS7316 and a st...
-
Guitar Fx Prototyping Breakout PCB This pcb is a breakout board for common guitar effect circuit components that don't easily fit on a ...
-
16 Ch ADC 16 Bit on One I2C Bus Four ADS1115 16 bit 4 channel ADCs are on this PCB, sharing one I2C bus to give up to 16 single en...
-
40 Pin Cable ESP32-C3 based Test Platform This is a test platform with 40 inputs and 40 outputs, using an ESP32-C3 Super Mini module with five...
-
Serial UPDI Programmer USB Serial to UPDI programming board for Atmel devices in the Arduino IDEHas a 5v / 3.3v switch to c...
-
Op Amp Buffer with In/Out Guitar Jacks The pcb has a guitar input and output jack to easily connect to a breadboard for guitar effect circu...
-
16 Channel Audio Loop Switcher This is a 16 channel audio loop switcher with 16 inputs and 16 outputs.Analog signals within a +/- 5...
-
16 Switches to RS485 Output Commands Up to 16 switches or 5v/gnd logic inputs can be monitored and when asserted (input = gnd), a sketch ...
-
MCP42100 Digital Pot Breakout PCB This breakout board for the MCP42100 dual digital pot has headers that are spaced for breadboard com...
-
Power Supply DC Jack/Screw Term/0.1" Header Breakout with PTC This breakout board allows connecting a power source via 2.1x5.5mm DC jack, 7.62mm screw terminals, ...
-
16x16 Analog Switch This 16x16 analog crosspoint switch uses two MT8816 8x16 switch ICs cascaded for a larger matrix.The...
-
Line Level Stereo Input to 3 Stereo Output Sharing PCB This audio sharing board will take a stereo line input from a 3.5mm jack, buffer it and send it out ...
-
MIDI Breakout In/Out/Thru This MIDI breakout board has 5 pin DIN jacks and Type A configured 3.5mm TRS jacks for Midi In, Midi...
-
Tandy CoCo Joystick Adapter - Use Digital Inputs for Analog X,Y axis Use 5v/GND digital signals to control the analog joystick input of a Tandy Color Computer.When input...
-
DIN 8 pin Circular Jack to pin header breakout board This PCB has a circular DIN 8 pin socket footprint that works with one of the connectors available o...
-
Dsub 9 pin breakout pcb DE9 DE9 Dsub 9 pin breakout boardHas headers for all 9 pins to easily connect Dupont wires or plug into ...
-
8 LED Scanner Back and Forth 4017 8 LEDs scan back and forth with a 555 clock and two 4017 counters.To simulate the way the lights use...
-
JFET Matching Circuit JFET Matching PCBUsed with a multimeter to read VGS on a JFET so that it acts like a 10K resistor.eg...
-
THS7316 Video Buffer and Op Amp Audio Buffer Breakout Board This pcb is intended for prototyping video circuits.It has a 3 channel video buffer THS7316 and a st...
-
Guitar Fx Prototyping Breakout PCB This pcb is a breakout board for common guitar effect circuit components that don't easily fit on a ...
-
16 Ch ADC 16 Bit on One I2C Bus Four ADS1115 16 bit 4 channel ADCs are on this PCB, sharing one I2C bus to give up to 16 single en...
-
40 Pin Cable ESP32-C3 based Test Platform This is a test platform with 40 inputs and 40 outputs, using an ESP32-C3 Super Mini module with five...
-
Serial UPDI Programmer USB Serial to UPDI programming board for Atmel devices in the Arduino IDEHas a 5v / 3.3v switch to c...
-
Op Amp Buffer with In/Out Guitar Jacks The pcb has a guitar input and output jack to easily connect to a breadboard for guitar effect circu...
-
16 Channel Audio Loop Switcher This is a 16 channel audio loop switcher with 16 inputs and 16 outputs.Analog signals within a +/- 5...
-
16 Switches to RS485 Output Commands Up to 16 switches or 5v/gnd logic inputs can be monitored and when asserted (input = gnd), a sketch ...
-
MCP42100 Digital Pot Breakout PCB This breakout board for the MCP42100 dual digital pot has headers that are spaced for breadboard com...
-
-
-
Modifying a Hotplate to a Reflow Solder Station
951 1 6 -
MPL3115A2 Barometric Pressure, Altitude, and Temperature Sensor
480 0 1 -
-
Nintendo 64DD Replacement Shell
411 0 2 -
V2 Commodore AMIGA USB-C Power Sink Delivery High Efficiency Supply Triple Output 5V ±12V OLED display ATARI compatible shark 100W
1189 4 2 -
How to measure weight with Load Cell and HX711
737 0 3