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TM990 System - Brand New (Boxed) Components


Stuart
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To take your minds off the US elections, I've had an e-mail from someone in Oregon, US who has got some TM990 module/parts for sale. They appear to be brand new, unused, boxed, with manuals (boxes have just been opened to verify the contents). Together they'll form a nice little minimal system that will run the TI Power BASIC software, plus the TIBUG monitor software, plus other stuff.

 

Components are:

 

-- 4 slot card cage

-- TM990/101 Processor module

-- TM990/302 Software Development Module

-- TM990/201 Memory Expansion Module (I need to double-check that there is one of these)

-- Set of Power BASIC EPROMs

 

The seller is after $150 for the lot, plus postage/packing costs (each component is around 2-4 lbs. with the manual).

 

To get it working, you'll need to be able to hook up a power supply to the card cage power terminals. A small PC power supply will work fine but you'll need to be able to solder some solder tags onto the power supply cables and sort out a power switch. You'll need a serial cable to connect the Processor module to your PC/laptop/whatever running a serial terminal application.

 

Although the components are brand new, it's all over 30 years old so no guarantees it will work (you might need to replace a RAM chip or two for example). Having said that, the manuals have full schematics and all the chips can still be obtained, and I'm happy to help out with any problems (and have duplicates of the EPROMs).

 

I've got spares of the TM990 modules that I've designed that I'm happy to negotiate on separately - IDE interface module (connects a hard disk or compact flash, with a simple disk operating system), 64K battery-backed RAM module, VDP and sound module (designed to use a TMS9918 with composite video output, but also works with an F18A but you'll need to build a small adaptor to reposition the IC socket).

 

Details of the TM990 modules can be found here: http://www.stuartconner.me.uk/tm990/tm990.htm

Some pictures of the bits actually for sale: https://portland.craigslist.org/wsc/sop/5865835012.html (it's on Craigslist for $200, but I've arranged to buy a second processor module separately, so $150 for the rest).

 

If you're interested, PM me an e-mail address that I can pass on to the seller. The two of you can then come to whatever arrangement you like (no comeback on me should anything go wrong!)

 

Stuart.

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Ksarul, on 08 Nov 2016 - 8:47 PM, said:

Ooohhhhh! I want one of these. . .please put me in contact with him, Stuart!

 

I should have placed a bet that you would be first, Jim! I'll add you to the e-mail thread in a minute using your ksarul e-mail address in your message. Let me know on here if nothing arrives.

 

(And I think it's a woman - Alexis.)

 

EDIT - saw the e-mail address in the message!

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There's a TM990 processor card (which you can play with standalone) on eBay at the moment for a very reasonable starting bid of $49.95. No bids yet - I suspect it will go unsold unless someone on here nabs it.

 

This card appears to be made by Varian and is a copy of the TI card. Varian was one of TI's big customers for these cards. It includes a clock chip - which I believe also cores and blends apples. ;-) The card appears to incorporate a couple of mods made to the TI card (a couple of tracks cut and a pair of wires added) to tweak the memory map to support the clock chip.

 

http://www.ebay.com/itm/VARIAN-PREDISPOSITION-IMPLANT-IMPLANTER-PREDAP-CPU-E-15002170-TI-TMS9900JDL-CPU-/132009625601?hash=item1ebc630801:g:bQEAAOSwj85YMksU

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There's a TM990 processor card (which you can play with standalone) on eBay at the moment for a very reasonable starting bid of $49.95. No bids yet - I suspect it will go unsold unless someone on here nabs it.

 

This card appears to be made by Varian and is a copy of the TI card. Varian was one of TI's big customers for these cards. It includes a clock chip - which I believe also cores and blends apples. ;-) The card appears to incorporate a couple of mods made to the TI card (a couple of tracks cut and a pair of wires added) to tweak the memory map to support the clock chip.

 

http://www.ebay.com/itm/VARIAN-PREDISPOSITION-IMPLANT-IMPLANTER-PREDAP-CPU-E-15002170-TI-TMS9900JDL-CPU-/132009625601?hash=item1ebc630801:g:bQEAAOSwj85YMksU

 

Stuart,

 

I ended up getting this - thanks for the heads-up! I am putting the finishing touches on my new lab and will start moving into it next weekend, after which I will be playing with this stuff on weekends and some evenings as family obligations allow. I'm sure I'll have questions for you. Step one is to get a socket for the edge connector. I'll break the signals out to a breadboard and will wire up a power supply that way so I don't have to solder any wires to the card itself.

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Stuart,

 

I ended up getting this - thanks for the heads-up! I am putting the finishing touches on my new lab and will start moving into it next weekend, after which I will be playing with this stuff on weekends and some evenings as family obligations allow. I'm sure I'll have questions for you. Step one is to get a socket for the edge connector. I'll break the signals out to a breadboard and will wire up a power supply that way so I don't have to solder any wires to the card itself.

 

I'll send you some info by e-mail.

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Some more TM990 modules on eBay for a good price:

 

Another CPU module: http://www.ebay.co.uk/itm/132022103829?ul_noapp=true

32K Dynamic RAM module: http://www.ebay.co.uk/itm/142199109600?ul_noapp=true

Industrial comms module using a TMS9980 and TMS9903: http://www.ebay.co.uk/itm/142199109600?ul_noapp=true

 

The seller has lots of other TM990 modules listed, if Jim fancies assembling his own wafer fab in his basement, right under his wife's nose ... ;-)

 

Stuart.

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