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Old Sperry computer

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    Old Sperry computer

    Hi Everyone,
    I recently found my (first) old Sperry computer. I'm trying to repair/start it back up, but I keep getting 4 beeps and then 7 beeps. I have looked over the board and it seems pretty clean. I have removed boards and still get beeps. I don't know the DIP switch settings, so I'm also wondering if that could be a reason. Any help would be great! Thanks so much!

    #2
    https://stason.org/TULARC/pc/motherboards/L/LEADING-EDGE-PRODUCTS-INC-8088-MODEL-M-MP1676L.html[/url]

    Larry

    LeadingEdgeM.png
    Last edited by ldkraemer; April 14, 2021, 01:14 PM.

    Comment


      #3
      I had posted the beep codes URL but it got overwritten. Funny how change is so GOOD, it deletes a post you just edited to add a photo.

      https://www.techspot.com/community/t...p-guide.95391/

      We need the duration of the BEEP codes. Long & Short of it.....Pun Intended.


      I've got the EGA ROM update in mine, so I'd have to go check the Motherboard switch settings for the Color Monitor.

      Larry
      Last edited by ldkraemer; April 14, 2021, 01:23 PM.

      Comment


        #4
        I recall that the Sperry PC (8088 ) was moderately popular, and that there was a Sperry PC IT (80286). I don't think that they went much beyond that.

        Comment


          #5
          We had some Sperry pc's at work. They had a hard drive, and a rocker switch on the front for the power. They were monochrome. I don't think they were used for much, they were too limited in capacity and capability.
          I've got a manual or two, but they are just a rebadged copy of the Microsoft manuals of the time.

          Comment


            #6
            Have a old 8088 Sperry / Univac system that i used years ago for running a remote control program. 10 meg HD and think CGA or EGA card. From what i recall it used the old style PC keyboard with the big plug and had a serial port built onto the motherboard with the reverse DB-25 that would make you think it was a parallel port. Ran DOS 3.3, DOS Shell and Terminal. Think the biggest issue thees days is the old monochrome, CGA and EGA displays and old style big plug stupid PC/XT keyboards are just about impossible to find without spending stupid amounts of money.

            Comment


              #7
              Originally posted by ldkraemer View Post
              I had posted the beep codes URL but it got overwritten. Funny how change is so GOOD, it deletes a post you just edited to add a photo.

              https://www.techspot.com/community/t...p-guide.95391/

              We need the duration of the BEEP codes. Long & Short of it.....Pun Intended.


              I've got the EGA ROM update in mine, so I'd have to go check the Motherboard switch settings for the Color Monitor.

              Larry
              HI Larry,
              Thanks for responding! It's one long then 4 short, then one long and 7 short. I hope this helps. Thanks!

              Comment


                #8
                Originally posted by Qbus View Post
                Have a old 8088 Sperry / Univac system that i used years ago for running a remote control program. 10 meg HD and think CGA or EGA card. From what i recall it used the old style PC keyboard with the big plug and had a serial port built onto the motherboard with the reverse DB-25 that would make you think it was a parallel port. Ran DOS 3.3, DOS Shell and Terminal. Think the biggest issue thees days is the old monochrome, CGA and EGA displays and old style big plug stupid PC/XT keyboards are just about impossible to find without spending stupid amounts of money.
                I'm lucky, I still have a few of those old keyboards laying around. One of them I had to use on my Tandy with a ps2 converter. It works though lol

                Comment


                  #9
                  Here are my two Switches on the Motherboard for EGA Monitor. I'd have to look at the SAMS Photofacts I have for the exact
                  switch information etc.


                  SW1-1 OFF
                  SW1-2 OFF
                  SW1-3 OFF
                  SW1-4 OFF
                  SW1-5 ON
                  SW1-6 ON
                  SW1-7 OFF
                  SW1-8 ON

                  SW2-1 ON
                  SW2-2 OFF
                  SW2-3 ON
                  SW2-4 ON
                  SW2-5 OFF
                  SW2-6 OFF
                  SW2-7 OFF
                  SW2-8 OFF

                  My cropped Photo's are too large to upload..... CHANGES ARE GOOD, but for what?


                  Larry

                  Comment


                    #10
                    Here are the possible switch settings:
                    Code:
                    SW1 Toggles 1,3,4 must be OFF
                    SW2 Toggles 5,6,7,8 must be OFF
                    
                    
                    Number of floppy Drives
                    1 SW1-8 ON SW1-7 ON
                    2 SW1-8 ON SW1-7 OFF
                    3 SW1-8 OFF SW1-7 ON
                    4 SW1-8 OFF SW1-7 OFF
                    
                    
                    SW1-1 MUST BE OFF
                    SW1-2 ON = <640K OFF = 640K
                    SW1-3 MUST BE OFF
                    SW1-4 MUST BE OFF
                    SW1-5 \
                    SW1-6  \ Floppy Drives
                    SW1-7  /
                    SW1-8 /
                    
                    
                    ON BOARD 128K 1,3,4 = ON 2 = OFF
                    EXP 256K 1,4 = ON 2,3 = OFF
                    EXP 384K 1,3 = ON 2,4 = OFF
                    EXP 512K 1 = ON 2,3,4 = OFF
                    EXP 640K 1,3,4 = ON 2 = OFF
                    
                    
                    SW2-1 \
                    SW2-2  \ Expansion Memory
                    SW2-3  /
                    SW2-4 /
                    SW2-5 MUST BE OFF
                    SW2-6 MUST BE OFF
                    SW2-7 MUST BE OFF
                    SW2-8 MUST BE OFF

                    Larry
                    Last edited by ldkraemer; April 15, 2021, 08:37 AM. Reason: typo

                    Comment


                      #11
                      Originally posted by ldkraemer View Post
                      Here are the possible switch settings:
                      Code:
                      SW1 Toggles 1,3,4 must be OFF
                      SW2 Toggles 5,6,7,8 must be OFF
                      
                      
                      Number of floppy Drives
                      1 SW1-8 ON SW1-7 ON
                      2 SW1-8 ON SW1-7 OFF
                      3 SW1-8 OFF SW1-7 ON
                      4 SW1-8 OFF SW1-7 OFF
                      
                      
                      SW1-1 MUST BE OFF
                      SW1-2 ON = <640K OFF = 640K
                      SW1-3 MUST BE OFF
                      SW1-4 MUST BE OFF
                      SW1-5 \
                      SW1-6 \ Floppy Drives
                      SW1-7 /
                      SW1-8 /
                      
                      
                      ON BOARD 128K 1,3,4 = ON 2 = OFF
                      EXP 256K 1,4 = ON 2,3 = OFF
                      EXP 384K 1,3 = ON 2,4 = OFF
                      EXP 512K 1 = ON 2,3,4 = OFF
                      EXP 640K 1,3,4 = ON 2 = OFF
                      
                      
                      SW2-1 \
                      SW2-2 \ Expansion Memory
                      SW2-3 /
                      SW2-4 /
                      SW2-5 MUST BE OFF
                      SW2-6 MUST BE OFF
                      SW2-7 MUST BE OFF
                      SW2-8 MUST BE OFF

                      Larry
                      These are great! Thank you. I am noticing though there are two sets. One on board and one on the back of the machine (still technically on board, but best way I can describe it).

                      Comment


                        #12
                        One long, four short beeps: Low battery voltage. Battery is likely dead or defective.
                        1 long, 7 short Unable to initialize video- This a video problem. Verify the Switches are set properly for the
                        Video card that is installed. Replace the video adapter with a known good one to see if that fixes the problem.

                        Larry

                        Comment


                          #13
                          Originally posted by ldkraemer View Post
                          One long, four short beeps: Low battery voltage. Battery is likely dead or defective.
                          1 long, 7 short Unable to initialize video- This a video problem. Verify the Switches are set properly for the
                          Video card that is installed. Replace the video adapter with a known good one to see if that fixes the problem.

                          Larry
                          So I checked the DIP settings..all was good there. Except there is a third set of dip switches on the back...maybe that's the video card settings? I can't find any information on it so anything you have would be even more helpful Thanks so much for this!

                          Comment

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