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
