I wonder if there is a way to boot that processor off of external memory, such that the firmware could be extracted...
On Friday, March 19, 2021, Darren Clark <biggran...@gmail.com> wrote: > That is awesome to see! I was hoping it would talk a little more about the > firmware running on the HD63A01, but the information on the pinout of the > gate array chip is interesting and matches up pretty well with what I > reverse engineered from the firmware. > > I'll have to revisit my reverse engineering of the firmware on the TPDD > and see if there is anything to update with this new information. Looks > like the returned error codes may be something to add. > > Here is a link to the firmware I pulled and decoded from the PDD1: > https://github.com/BiggRanger/Tandy_PDD/blob/master/PDD1.ASM > > And the whole project: https://github.com/BiggRanger/Tandy_PDD > > Maybe if someone has a bad TPDD2 or 2 I can try to get the firmware off of > that too. > > Darren Clark > > > > > > On 3/18/21 9:59 PM, Brian K. White wrote: > >> On 3/18/21 8:31 PM, Joshua O'Keefe wrote: >> >>> On Mar 18, 2021, at 5:13 PM, Stephen Adolph <twospru...@gmail.com >>> <mailto:twospru...@gmail.com>> wrote: >>> >>>> so I did it brute-force. >>>> https://bitchin100.com/wiki/index.php?title=TPDD_Service_Manual < >>>> https://bitchin100.com/wiki/index.php?title=TPDD_Service_Manual> >>>> >>> >>> In the interest of preservation and putting our eggs in multiple >>> baskets, I have mirrored this file to my S3 bucket >>> >> >> Similarly I put it in archive.org >> >>
