I think the 128K or RAM is a typo and should only be 128 bytes. Looking
at page 97 (set the data to drive's memory) and page 89 (get the data
from the drive's memory), there is only enough room to request 125 bytes
at a time.
Also from my disassembly of the TPDD1 ROM and the very similar
architecture (same CPU and RAM and CPLD), there is only 128 bytes of
scratch ram.
Darren Clark
On 1/8/24 13:55, Tim Russell wrote:
Geez, up-front the manual said 128K of RAM! I was thinking one could
reprogram the ROM to make it a ram disk for a sec there, but the parts
list only shows 2K of SRAM unless I missed something?
Anyway, thanks much for the efforts, all! Great stuff.
Tim
On Mon, Jan 8, 2024, 10:23 <bir...@soigeneris.com> wrote:
The TPDD2 service manual in all of its glory...
https://archive.org/details/tpdd-2-service-manual
Jeff Birt
