26 Feb
2023
26 Feb
'23
6:47 a.m.
On 2/26/2023 1:15 AM, jos via cctalk wrote:
On 25.02.23 18:52, silvercreekvalley--- via cctalk
wrote:
Too bad we probably can't get the damaged board to image the PROMS and
programmable parts.
ISTR seeing some of that information in the drawings.
I tried to reverse engineer the 128K memory controller, but ran into
issues where I could not be certain what should be in the ROMs and other
programmable parts. (It is not just a bigger memory; there's remapping
for DMA, remapping for user mode, and all kinds of other stuff in there.)
Vince
Thanks Vince - I knew about the RX emulators but
not the serial disk -
that sounds interesting. Is there any documentation on that - I had a
look at the GitHub but seemed a bit sparse.
I can imagine the FFP8/A is hard to find and replicate. I can probably
use emulation - but its nice to check with real hardware.
This is probably not the right place to link the youtube video of the
guy that destroyed a FPP8/A set to recover the gold on the PCB-fingers...
I do have a rather complete 8/A, with RL01 ad FPP8/A. Alas no sockets
inside so the PROMs cannot easily be read out.