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Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 4:31 pm
by Pr0f
Once i get the OPD running, I plan on getting the PCML Telestore ROM copied out that allows for the extra memory. With basic embedded in an Internal ROM, plus the 128K as Static RAM all built on a modified CPU plugin board, that should give the machine a bit more horsepower, and still allow 4 slot xchange cartidge to be used.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 4:40 pm
by stephen_usher
If I could get a copy of the Telestore ROM that would be useful to make SRAM modules which can fit into the ROM slots.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 5:31 pm
by Pr0f
stephen_usher wrote: Mon Jul 08, 2024 4:40 pm
If I could get a copy of the Telestore ROM that would be useful to make SRAM modules which can fit into the ROM slots.
I'll post it here once I have it up and running
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 9:32 pm
by stephen_usher
Thanks. Even if we can get a small (16K) upgrade it would offset the memory taken by disk interfaces and allow the config program to run under BASIC.
Unfortunately PCBWay are being slow at creating the PCBs today so very unlikely that they'll arrive before next weekend when I'd have time to test things.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 9:43 pm
by stephen_usher
Pr0f wrote: Mon Jul 08, 2024 4:31 pm
Once i get the OPD running, I plan on getting the PCML Telestore ROM copied out that allows for the extra memory. With basic embedded in an Internal ROM, plus the 128K as Static RAM all built on a modified CPU plugin board, that should give the machine a bit more horsepower, and still allow 4 slot xchange cartidge to be used.
By the way, you didn't just buy the Telestore from eBay did you?
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 9:48 pm
by Pr0f
No - I got one earlier - I paid a bit more than that one went for on ebay, which I watched to see how much it went for.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 9:50 pm
by Pr0f
to fit the memory in the same size case, they soldered the ROMS directly to the board - no sockets - so the extra ROM that carries the utils for Xchange and the additional memory management can't be removed easily to read it's contents.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 10:06 pm
by stephen_usher
That's annoying.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 10:07 pm
by stephen_usher
Pr0f wrote: Mon Jul 08, 2024 9:48 pm
No - I got one earlier - I paid a bit more than that one went for on ebay, which I watched to see how much it went for.
Ah. If I knew how much you paid I'd have set that as the maximum bid. I was sniped on all the ROM modules and the Telestore all in the same second, which suggests some sort of automation.
Re: OPD: Computer One floppy interface recreation.
Posted: Mon Jul 08, 2024 10:11 pm
by Pr0f
I got 2 of the ROM modules - the ones from satelite computing - never seen them before - I am happy to dump the contents of these out to add to the ROM library
I missed out on the big disk units a few months back - the ones that run CPM from a 64180 chip and provide a disk interface.