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990 cards on ebay


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  • 2 weeks later...

Supposing I were building a little backplane to plug the 990/10A cpu into ...

 

I looked for the necessary 80 pin card edge connectors. No keying. No weird pitches, just 0.1".  Mouser, Digi-Key, Farnell/Newark, electronics surplus, goldmine, Arrow, Jameco, PEconnectors, ..? Kinda obscure and pricey. Want to order from North America. 
 

So far, Arrow had the best price at $5. ?? Newark has some on clearance for $7.72.

Direct from TE connectors site: the 2-5530843-0

is $6.31

Mouser 6.32 on qty 10

 

Others have them at $10-$15. Some are surface mount types, which could be ok, but they're pricy. 

 

Any other leads on 80 position, 40x2, 0.1", solder tail (or wire wrap) card edge connectors? 

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  • 2 weeks later...

WOW!

 

The AMPL system was a developer tool for 9900 hardware systems (call that a device-under-test, DUT.)

 

It looks like a 9900 inside the "buffer".
 

One cable would connect this module into the DUT's CPU socket. The other cables (2?) would go to a card in a 990/4 minicomputer. 
 

 Not sure about the internal 9900's role. 
 

The AMPL software could do such things as single-step, or  record and show instruction trace. 
 

AMPL Manuals here

 

http://www.bitsavers.org/pdf/ti/990/ampl/
 

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Other targets were available, too, iirc, like TMS7000. AMPL preceeded the XDS standalone and PC in-circuit emulators that do not require a 990.

 

Looks like a fried wire in the target cable; hope the buffer board isn't dead.

Edited by jbdigriz
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On 1/3/2023 at 3:22 PM, FarmerPotato said:

Supposing I were building a little backplane to plug the 990/10A cpu into ...

 

I looked for the necessary 80 pin card edge connectors. No keying. No weird pitches, just 0.1".  Mouser, Digi-Key, Farnell/Newark, electronics surplus, goldmine, Arrow, Jameco, PEconnectors, ..? Kinda obscure and pricey. Want to order from North America. 
 

So far, Arrow had the best price at $5. ?? Newark has some on clearance for $7.72.

Direct from TE connectors site: the 2-5530843-0

is $6.31

Mouser 6.32 on qty 10

 

Others have them at $10-$15. Some are surface mount types, which could be ok, but they're pricy. 

 

Any other leads on 80 position, 40x2, 0.1", solder tail (or wire wrap) card edge connectors? 

Sorry, only just seen this.

The connectors aren't 0.1" pitch, they are 0.125" pitch.

I got some from a surplus place recommended on there somewhere.

I will find it and put here.

 

 

Edit:  Oh, it was you that pointed me at the company.

https://www.electronicsurplus.com/gc-electronics-41-858-connector-pcb-edge-40-position-80-pin-dual-a7d40ww27a3

 

Edited by Jimhearne
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