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TMS 9900 Project PCB Available


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#1 Stuart OFFLINE  

Stuart

    Dragonstomper

  • 669 posts
  • Location:Southampton, UK

Posted Tue Jul 11, 2017 2:42 AM

I've been playing with breadboards and PCBs again, and have a new little system available based on our favourite processor, the TMS 9900. Specs are:

  • 16-bit TMS 9900 microprocessor running at 3 MHz.
  • TMS 9901 Programmable Systems Interface.
  • 32K + 32K byte (two banks) EPROM, bank selectable through jumper or CRU output bit.
  • 32K + 32K byte (two banks) battery-backed static RAM, bank selectable through CRU output bit.
  • RS-232 serial port operating at 19200 Baud (7 data bits, even parity, 2 stop bits).
  • Single +5V @ 200mA power supply requirement.
  • Reset switch.
  • Small prototyping area on PCB.

Runs a system monitor, Cortex BASIC and Forth. No means of saving programs, but you can maintain/edit them on the PC and download them over the serial link. On the PCB, there are take-off points for all the main signals, if you want to expand it further. More details here: http://www.stuartcon..._breadboard.htm.
 
I've got a couple of bare PCBs spare - anyone interested? £27 each plus postage to you from the UK. This will include:

  • The PCB.
  • A TMS9900, 9901, 9904. I was given several sets of these, so am passing them on for free. Some parts appear to be “remanufactured in China”, but I’ve tested them and they seem OK (at least in the short term).
  • +12V converter module.
  • 64-pin turned pin IC socket.
  • 3.3uH choke.
  • Reset switch, power socket, pin strips.
  • Various resistors where I have lots of spares.

All the other parts needed are easily available.

 

Let me know if interested.

 

tms9900_pcb_system_cropped.gif



#2 Ksarul OFFLINE  

Ksarul

    River Patroller

  • 4,052 posts

Posted Tue Jul 11, 2017 3:51 AM

I like this!  :)  I think I would like one, Stuart.  :)



#3 RickyDean ONLINE  

RickyDean

    Dragonstomper

  • 601 posts

Posted Tue Jul 11, 2017 6:15 AM

I'm interested Stuart, send me a PM on how to pay. Thanks



#4 TheBF ONLINE  

TheBF

    Moonsweeper

  • 253 posts
  • Location:The Great White North

Posted Tue Jul 11, 2017 8:20 AM

I've been playing with breadboards and PCBs again, and have a new little system available based on our favourite processor, the TMS 9900. Specs are:

  • 16-bit TMS 9900 microprocessor running at 3 MHz.
  • TMS 9901 Programmable Systems Interface.
  • 32K + 32K byte (two banks) EPROM, bank selectable through jumper or CRU output bit.
  • 32K + 32K byte (two banks) battery-backed static RAM, bank selectable through CRU output bit.
  • RS-232 serial port operating at 19200 Baud (7 data bits, even parity, 2 stop bits).
  • Single +5V @ 200mA power supply requirement.
  • Reset switch.
  • Small prototyping area on PCB.

Runs a system monitor, Cortex BASIC and Forth. No means of saving programs, but you can maintain/edit them on the PC and download them over the serial link. On the PCB, there are take-off points for all the main signals, if you want to expand it further. More details here: http://www.stuartcon..._breadboard.htm.
 
I've got a couple of bare PCBs spare - anyone interested? £27 each plus postage to you from the UK. This will include:

  • The PCB.
  • A TMS9900, 9901, 9904. I was given several sets of these, so am passing them on for free. Some parts appear to be “remanufactured in China”, but I’ve tested them and they seem OK (at least in the short term).
  • +12V converter module.
  • 64-pin turned pin IC socket.
  • 3.3uH choke.
  • Reset switch, power socket, pin strips.
  • Various resistors where I have lots of spares.

All the other parts needed are easily available.

 

Let me know if interested.

 

tms9900_pcb_system_cropped.gif

 

 

This looks like a dream I had one night.  Nice work!

 

But if I get one, my life would go on hold and I would need a divorce lawyer.  :_(



#5 helocast OFFLINE  

helocast

    Star Raider

  • 69 posts
  • Location:Amarillo, TX

Posted Fri Jul 14, 2017 8:56 PM

I've been playing with breadboards and PCBs again, and have a new little system available based on our favourite processor, the TMS 9900. Specs are:

 

I've got all the parts and then some, SO ... if you still have a PCB only after July 25 (payday for me) please consider me for a good home. Thankyou in advance.

P.S. I'll need payment details/method.






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