TI-74 TI-95 8x32K banked RAM/FLASH cart soon, ROM images needed

[Jeff_Birt]

Thanks for the links guys!

Had a bit of a snafu with the connector last evening. I sent enclosures to the other two guys with the new RAM/FLASH carts and one guy could not get the boards to function when in the case. We tracked that down late last night to the new connector being not as deep internally and having more of a shallow slope to the contact pins than the original.

The machine PCB has a ~2mm blank edge around the card edge. When combined with the new connector pin shape this was not letting the connector pins make good contact with the PCB. On my TI-95 the RAM cart was iffy with no enclosure but worked fine with/without enclosure in the TI-74. A bit of variability in the machine PCBs.

I was able to reform the top row of pins, carefully, to more of a bull nose like the original connector and this seems to have done the trick. We'll do a lot more testing to see how robust this solution is. Given the slim pickings in 0.050" pitch card edge connectors, and ones that are small enough to fit this application we may need to stick with this connector and manually adjust the top row pins on each one.