View Full Version : TMS9900 Hardware Thread

March 10th, 2015, 02:28 AM

Is anyone interested in a dedicated TMS9900 hardware thread for homebrew projects and DIY electroincs related to the TMS99xx chips ?

March 12th, 2015, 01:59 AM
If there's enough people interested then it could be a success !

Micro Designer
March 13th, 2015, 04:27 AM
Overclocking TMS9900, TMS9995 and TMS991xx CPUs ??

I've read in the TIM9904A databook that you can use a 16MHz crystal giving a 4MHz bus thus 'Overclocking' it from the normal 12MHz / 3MHz bus ? But how far can you safely overclock ?

Micro Designer
April 2nd, 2015, 08:58 AM

Does anyone know where/if there's any VHDL code for TMS99xx ICs.. i.e. Has anyone done/modelled TMS99xx ICs in VHDL or Verilog ?? I heard a rumour that the UK Ti-99 User Group where trying to make a Ti-99/4A in VHDL .. but I think it may be a Myth ??