TS2068 Eprom Command Cartridge V2
Original Website: https://gitlab.com/NF6X_Retrocomputing/ts2068cart
This board allows many 28-pin EPROMs, EEPROMs and mask ROMs to be used in the cartridge slot of the Timex Sinclair 2068 computer. The installed memory may be mapped into any or all of the 8k banks of the dock space. Write access is supported for EEPROM memories.
Supported Memory Chips
Chip Size (bytes) Type Notes
2764 8k EPROM
27128 16k EPROM
27256 32k EPROM
27512 64k EPROM
23128 16k Mask ROM i.e. Spectrum ROM chip
23256 32k Mask ROM 2864 8k EEPROM Read/write (see datasheet for algorithm)
28256 32k EEPROM Read/write (see datasheet for algorithm)
One or two jumpers need to be installed at JP1 to configure the memory type. A summary table is provided on the back side of the board:
Also install one or more jumpers at JP2 to map the memory chip into the desired 8k dock space banks.
Suggested Parts (not including memory chip)
Refs Manufacturer Part Number Comments
U1 Texas Instruments SN74LS32N No socket: limited vertical clearance
U2 Texas Instruments SN74LS156N No socket: limited vertical clearance
U3 3M 4828-6000-CP Socket for memory chip
C1-C3 Kemet C320C104M5R5TA
R1-R2 Stackpole Electronics CF14JT10K0
JP1-JP2 Sullins PBC36DAAN Cut to length; 2.5 boards per strip
Jumpers Sullins QPC02SXGN-RC
About the Design
This board was designed in Kicad 2014-12-16 BZR 5324 on a Mac. Design rules are 6 mil line, 6 mil trace, 13 mil via hole. It is suitable for fabrication at OSH Park.
ts2068cart is a public domain open source hardware design by Mark J. Blair nf6x@nf6x.net, created in August, 2015.
It is offered with no license restrictions, and no warranty.
Use it at your own risk.
TS2068 Eprom Command Cartridge V2
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
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