Electronics > Projects, Designs, and Technical Stuff

Z80 Single (Perf)Board Computer

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obiwanjacobi:
I could program my GALs with the MiniPro TL866.

grumpydoc:

--- Quote from: obiwanjacobi on April 03, 2017, 07:39:25 am ---I could program my GALs with the MiniPro TL866.

--- End quote ---
In theory I can program them with my Dataman S4 but I don't have the necessary adapter which costs about 4x what it would cost to build one.

Sadly Dataman don't publish the circuit

Maybe I will keep an eye out on eBay.

technix:

--- Quote from: grumpydoc on April 03, 2017, 08:56:05 am ---
--- Quote from: obiwanjacobi on April 03, 2017, 07:39:25 am ---I could program my GALs with the MiniPro TL866.

--- End quote ---
In theory I can program them with my Dataman S4 but I don't have the necessary adapter which costs about 4x what it would cost to build one.

Sadly Dataman don't publish the circuit

Maybe I will keep an eye out on eBay.

--- End quote ---
Since you are okay with PLCC, maybe try MAX7000 series CPLD from Altera. Those are 5V Flash-based parts and they can be reprogrammed in circuit using JTAG and a USB Blaster.

spudboy488:
The MAX3000 series are also 5V tolerant and less expensive. I use them all the time for glue logic to save board space or if I'm not 100% sure how the circuit will end up functioning. It's like having programmable copper.

grumpydoc:

--- Quote from: obiwanjacobi on April 02, 2017, 05:53:35 am ---That is pretty tight. Are you sure you will be able to connect it all?
Other than that, very nice.  :-+

--- End quote ---
Starting to look like everything will go on the board OK



Current plan, the layout has needed a few more minor tweaks.



+5V routing added and gate connections as it makes it easier to wire it up. I just print out the layout A4 sized and work from that.

Hmmm, just realised I don't have +5V on the right edge of the board for the TTL level serial port and the parallel port connectors. Could be tricky to get it across.

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