54 replies to this topic

[Stuart]

Well I've gone as far as I'm going with this I think. Website updated with hopefully all the information one would need (www.avjd51.dsl.pipex.com/tms9995_breadboard/tms9995_breadboard.htm) plus EPROM images for BASIC and Forth. To keep Marc happy I've included some details about interfacing a VDP, SID and keyboard, but it will be up to the reader to work out (and experiment with) the exact circuitry required; that's the best way to learn

Stuart.

[retroclouds]

Looks very interesting. I am a hardware noob, but this seems the right project for me.
I'd like to turn my spectra2 library -which I haven't touched for almost a year now- into an OS.
It's actually a mini-os already and I like to further investigate and enhance its thread capabilities.

This could turn into a long-term project for the winter 2012-2013

thanks for your hard work on this

[Stuart]

I've set up a new web page for a breadboard system for a TMS 99110 processor that someone kindly gave me. The 99110 is a third-generation member of the 9900 family, and includes a macrostore feature that contains floating point instructions as part of the machine language instruction set. The processor runs at up to 6 MHz.

<http://www.avjd51.ds..._breadboard.htm>

I've included some very non-scientific benchmarks of the performance of the 99110 against the 9900 and 9995 in various configurations. Even at the same clock speeds, its significantly faster.

Stuart.

[samishal]

Hello, sorry I haven't posted in a while, bogged down with coursework Stuart!!!!!!!! such detailed project instructions on the TM 9995 article! thank you so much!

[apersson850]

Hmm, I have some TMS 9995 lying around... Almost feel the urge to do something with it.