ISA to PLUS adapter

[HoJoPo]

If someone is interested in developing a Tandy PLUS card format XT-IDE or other card, I have a pair of ISA to PLUS adapters that allow a PLUS card to be used in a standard ISA slot. RS Cat. No. 25-1016

 

[eeguru]

I have a board currently being fabricated at itead.cc that adds an XT-IDE interface and HardMPU interface for Roland MIDI devices like an MT-32. I should be back in about a week. I'll let you know how it turns out. One caveat, I'm not concerned as much about DoM compatibility as I should be. I'm just interested in plugging a NetPi-IDE into it.

I the mean-time, dJOS has done a lot of work on right angle adapters for PLUS that allow adding small ISA cards. Check out the thread here:

http://www.vcfed.org/forum/showthread.php?58793-Tandy-1000-Adapters-expressions-of-interest

 

[HoJoPo]

I have a board currently being fabricated at itead.cc that adds an XT-IDE interface and HardMPU interface for Roland MIDI devices like an MT-32. I should be back in about a week. I'll let you know how it turns out. One caveat, I'm not concerned as much about DoM compatibility as I should be. I'm just interested in plugging a NetPi-IDE into it.

I the mean-time, dJOS has done a lot of work on right angle adapters for PLUS that allow adding small ISA cards. Check out the thread here:

http://www.vcfed.org/forum/showthread.php?58793-Tandy-1000-Adapters-expressions-of-interest

Thanks, I've bought a couple of dJOS' adapters, I was doing some cleanup and found these PLUS to ISA adapters and thought it might be a good way for someone without a Tandy 1000 to test on another 8 bit XT system, if they wanted to make a PLUS card format version of an XT-IDE or something else.

 

[dJOS]

Thanks, I've bought a couple of dJOS' adapters, I was doing some cleanup and found these PLUS to ISA adapters and thought it might be a good way for someone without a Tandy 1000 to test on another 8 bit XT system, if they wanted to make a PLUS card format version of an XT-IDE or something else.

Are they the adapters Tandy made that allow PLUS cards to be installed into ISA Slots?

If yes can you post some pics please? I've never seen pics of them before, only ever heard of them.

 

[HoJoPo]

Are they the adapters Tandy made that allow PLUS cards to be installed into ISA Slots?

If yes can you post some pics please? I've never seen pics of them before, only ever heard of them.

Yes, they are the Tandy adapters. I have one complete in original packaging, one opened with all the original items. I have the instructions too, I can scan those. I'll try to get it done tomorrow or over the weekend.

It is possible to modify them soldering an ISA slot on the ISA edge connector and replacing the header with a socket, to make the very adapter you are selling... but it's clunky.

BTW, I'm not sure if you're aware, but the schematic and silk screen for the Tandy 1000EX/HX memory expansion / DMA card are in the tech reference manuals for the 1000EX/HX, along with some other PLUS cards...

ftp://ftp.mindcandydvd.com/pub/drivers/Tandy/Tandy_1000EX_Technical_Reference_Manual.pdf The memory expansion / DMA controller starts on page 138 of the PDF.

 

[dJOS]

Yes, they are the Tandy adapters. I have one complete in original packaging, one opened with all the original items. I have the instructions too, I can scan those. I'll try to get it done tomorrow or over the weekend.

Cool. Cheers

It is possible to modify them soldering an ISA slot on the ISA edge connector and replacing the header with a socket, to make the very adapter you are selling... but it's clunky.

yeah It wouldn't be worth it, making mine as flat as they are was painful enough - I actually use normal through hole ISA slots but bend the pins inward so they can be soldered onto the PCB pads.

The original versions made the ISA card sit too high in the bay:

but v1.x fixed that and now the ISA cards sit at the same height as PLUS cards would have:

BTW, I'm not sure if you're aware, but the schematic and silk screen for the Tandy 1000EX/HX memory expansion / DMA card are in the tech reference manuals for the 1000EX/HX, along with some other PLUS cards...

I've got a scan of the Ref manual but it's not very good quality and it's hard to read the schematics .... however I recently managed to buy an original EX tech Ref manual from fleabay for almost as much as my computer cost me, so that will help enormously.