I ended up printing mine out and re-arranging the pages. The FDC mode information was very helpful for the Sardine emulation that I wrote into mComm. Traveling Software created their dictionary disk using 256 byte blocks (80 sectors, 5 tracks). Steve A. had the disk and pulled the data off for me and once that was done it became a matter of figuring out how Sardine switches between File mode and FDC mode. The TPDD2 has a different sector access protocol which is different from the TPDD1 FDC mode. I've noticed in testing that Sardine will switch out of FDC mode and send a TPDD2 sector access request. This is VERY rare but I have seen it when using an old Prolific USB adapter. So there must be a way to emulate FDC mode with a TPDD2. I'm trying to figure that out so that mComm can respond to both types of requests. So far the only info on the TPDD2 sector access protocol is on the Bitchin100 site.
Kurt On Tuesday, August 8, 2017 12:08 PM, "biggran...@tds.net" <biggran...@tds.net> wrote: Awesome!!! I've not seen this before and it answers quite a few questions I've had. In the firmware, around address F0F0 there is, for lack of a better term, a switch/case block of code. The cases are: F, G, R, W, X, A, B, C, S, D, and M I've not seen references to these before in any documentation, but on page 17 of the PDF (33 of the manual), there they are! This will help out immensely with documenting the decompiled source of the PDD1 firmware. Now I just need to put the manual in order and do an OCR on it so it's searchable. Thank you very much! On 8/8/2017 2:18 PM, Kurt McCullum wrote: Send On Tuesday, August 8, 2017 11:13 AM, "biggran...@tds.net" <biggran...@tds.net> wrote: Could you e-mail me your 26-3808 manual? I have a 26-3808 Operation Manual for the PDD1, and the contents are very similar to the PDD2 Operation Manual 26-3814. So this would be new and useful. Thanks in advance! On 8/8/2017 1:14 PM, Kurt McCullum wrote: The manual I have is 26-3808 which details the File mode and FDC mode of the TPDD1. I don't know the number for the TPDD2. 26-3814 is the standard user manual for the TPDD2 and I've got that. I'm not sure if Tandy ever published something for the TPDD2 like the 26-3808 manual. If they did, I'd love to get a hold of it. Kurt On Tuesday, August 8, 2017 9:53 AM, "biggran...@tds.net" <biggran...@tds.net> wrote: I have the following: Tandy Portable Disk Dirve Operation Manual Cat. No. 26-3808 Tandy Portable Disk Dirve 2 Operation Manual Cat. No. 26-3814 If you want one of these I can e-mail them to you. Do you have a service manual for the PDD? If so, could you e-mail it to me, I'd be very interested in it as I'm working on reverse engineering the firmware on the PDD1 (https://github.com/BiggRanger/Tandy_PDD).