Home Page Forums MAME MAME Offer: Tandberg TDV2324 CP/M computer from the 70s

Elbarto: as mentioned in a recent commit to svn, the tandberg keyboard has a 2716 rom in it which needs dumping. Is it ok for JonasP to send you that rom?

LN

I've already corresponded with him in private. All it takes now is for me to actually send it. Don't worry, it'll happen soon.

Here are 2 new dumps for the system in a different format:
http://www.2shared.com/file/bq0VSZY6/tosxmon_suprcalc.html

The format is:
sector 0: 26x128, FM
sector 1-76: 26x256, MFM

The first sector is empty in both cases.
The software is 1) x monitor + tandberg OS and 2) supercalc(?)

I am doing a bit of research on the predecessor for this machine, the TDV-2124. In that regard I have a dump of a system disk with TOS v2.3 which I believe is one of the very last versions of Tandberg OS. This disk is in the same format as the one Jonas mention in the previous message here from 10 years ago.

That being said, I see now that practically all links in this thread are dead. It would be amazing to have some of the manual-scans and files mentioned here, given the mentioned cross-compatibility between these machines.

A bit of history, the evolution of these machines is something like this:
* TDV-2000 (197?) - First terminal
* TDV-2114 (1976) - First computer (8080-based, 16-56KB RAM, TDV-2115 terminal hardware-module built-in)
* TDV-2124 (1980) - Same as TDV-2114, but with double-side double-density disk support. 56KB or 64KB RAM? (not sure if all 64K on the RAM board is available)
* TDV-2324 (1982) - Completely new design, 8085-based, 64KB RAM, HDD support, fully backwards-compatible with 2100-series

Another thing worth noting, the mentioned X-monitor seems to only be a loadable module for the TDV-2324, whereas on the TDV-21x4 it's permanently in ROM at the lower 8K of the memory map. Quite a lot of system functionality is in this monitor, and it is my guess that software uses this for everything instead of calling the hardware directly. This would also explain the good backwards-compatibility of the TDV-2324.

Looking a little bit on the disassembly, a ton of the functions in there (including every single interrupt-handler) also have optional hooks the OS can take use of. These hooks are stored (among other monitor-variables) as pointers in a reserved 2K area of RAM. On the TDV-21x4 series this memory area is made up of dedicated RAM chips on the CPU card, so it's guaranteed to be there even if there's no other RAM-expansion cards installed.