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Ti-990

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    #46
    Its good to see some interest in the TI-990, I just happen to have one being shipped to me right now. It's not a complete system though and comprises just the 13 slot chassis, 990/10 and the programmer panel. I figure I need some additional I/O and would love to get a serial terminal and floppy/hard drive interface up and running.
    If anyone has suggestion for the minimum specification (additional) hardware to achieve this then it would be much appreciated.

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      #47
      I have quite a few spare assorted CRU boards, if it comes to that. More than I'll ever need.

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        #48
        Originally posted by bear View Post
        I have quite a few spare assorted CRU boards, if it comes to that. More than I'll ever need.
        Thanks - do you happen to have one of the TTY/EIA CRU 946240-9701 and associated adapter cards available please ? I believe its part number 975200-0001
        Last edited by zippysticks; September 7, 2021, 12:10 PM.

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          #49
          Originally posted by zippysticks View Post
          Its good to see some interest in the TI-990, I just happen to have one being shipped to me right now. It's not a complete system though and comprises just the 13 slot chassis, 990/10 and the programmer panel. I figure I need some additional I/O and would love to get a serial terminal and floppy/hard drive interface up and running.
          If anyone has suggestion for the minimum specification (additional) hardware to achieve this then it would be much appreciated.
          You will need memory also. I have some excess /10 memory boards. Dusty and untested, but have them. Like bear said, if all else fails... Shipping from here to UK would not be cheap. If you're going to be using a serial terminal or an emulator, you may want to use a CI402 or better serial interface. Another option that has been mentioned here is a /5 cpu board, which has an onboard serial port. The /10A does also.

          There is some 990 stuff on ebay.co.uk right now, btw. Seller is reasonable, and should have other items that aren't listed.

          Comment


            #50
            Originally posted by zippysticks View Post

            Thanks - do you happen to have one of the TTY/EIA CRU 946240-9701 and associated adapter cards available please ? I believe its part number 975200-0001
            The boards I have spare are 945075-0001 EIA RS232, 946076-0005 Dual 911 VDT, and 2263480-0001 EXACU.

            Comment


              #51
              Thanks all.
              Its the 990/10A model I have with 512K on board. The card and 13 slot chassis arrived today and so I plugged in the programmers panel I have had for some time.

              It works - I have basic control over the machine from the programmer panel.
              Yes, the /10A has the serial port on board so if I can get some software to use it (and an adaptor cable made up) then I may be ok.

              I have my eye on a spectralogic card for disk I/o and need to find some archaic compatible drives to use with it.
              I'm reliably informed that I need at least 5MB of space for DX10 and more for DNOS - so floppy drive working is not an option for anything useful.

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