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Type: Posts; User: Old_hitech

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  1. modem7, Thanks for the information. I went to...

    modem7, Thanks for the information.
    I went to order some replacement capacitors on Digikey website and found a candidate replacement for the 10uf 16V cap. --- KEMET Tantalum Through-Hole...
  2. Here are some updates: The ROM adapter that...

    Here are some updates:

    The ROM adapter that came with my Supersoft ROM is shown in the attached picture.

    I did a power on with the P8 plug disconnected and got a similar result (hear speaker...
  3. I recently acquired this rev A 5150 with the...

    I recently acquired this rev A 5150 with the 16-64K motherboard from eBay. The seller stated that he heard a single tone from the speaker when he powered on the computer back a few months ago. When I...
  4. modem7, Thanks for the analysis of my screen...

    modem7, Thanks for the analysis of my screen shots. I am not sure if I am following everything in your explanation, but I think you are saying that my problem could be in the bank 0 RAM. Is that...
  5. I made another attempt at reducing the size of...

    I made another attempt at reducing the size of the screen shots for Items 1-3 that I mentioned in my initial post. Thanks to Stone for the tips on reducing the size.
  6. Help with 5150 rev A Supersoft ROM results

    I have a IBM PC 5150 Rev A 16K -64K motherboard that appears "dead" with original BIOS rom. I previously found a +12V cap that was shorted and have removed it. I installed Supersoft diagnostic ROM...
  7. Yup. I wonder what is going to happen the next...

    Yup. I wonder what is going to happen the next time I try to boot my 5150. I'm glad you were able to get your computer working again. I think I read in an earlier post, that someone stated that the...
  8. Yes. I did swap out the A: drive for the half...

    Yes. I did swap out the A: drive for the half height drive, but that drive seemed to spin kind of slow which is why I think it did not boot to DOS. So that half-height drive will need some repair....
  9. I worked on my 5150 today and was finally able to...

    I worked on my 5150 today and was finally able to get it to boot to DOS 2.1 (and other disks). I noticed again today that the first time I turned on the computer with DOS 2.1 diskette in drive A: it...
  10. I worked on my 5150 no boot to DOS problem...

    I worked on my 5150 no boot to DOS problem yesterday. I followed some suggestions to remove my Stoned virus from my diskettes with McAfee antivirus. That was done. I next removed my FDD controller...
  11. Well, I found another floppy drive controller in...

    Well, I found another floppy drive controller in my older parts donor IBM PC XT. I checked that the disk drive harness connections and termination was as described at minuszerodegrees.net. I...
  12. Well, I checked the 5150 motherboard switches and...

    Well, I checked the 5150 motherboard switches and they were correct for the 2 drive, CGA setup (although I could not tell if my combo CGA/printer card was 40 column or 80 column - MB switch was set...
  13. Stone, No. I have not tried the DOS 2.1...

    Stone,

    No. I have not tried the DOS 2.1 diskettes in another machine. The first DOS 2.1. diskette did boot a couple of times in drive A, but then drive A would no longer boot the diskette. I have...
  14. IBM PC 5150 Powers on, but does not boot DOS 2.1

    I pulled my old IBM PC 5150 Rev B 64-256K MB with 1 full height drive out of the garage and found that it was not working right. Initially, I had 3B 301 and 601 power on fails. I cleared the 3B 301...
  15. Replies
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    Glad to hear you have your Rev 0 almost working....

    Glad to hear you have your Rev 0 almost working. I believe the video generation on the Rev 0 has some anomalies when compared to later Apple IIs. I have found Winston Gayler's The Apple II Circuit...
  16. Replies
    9
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    850

    Stone, OK. Thanks for the recommendation. Next...

    Stone, OK. Thanks for the recommendation. Next diskette to be scanned will be using SCAN.exe from floppy using the /MANY switch.
  17. Replies
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    850

    When lutiana mentioned the RAM drive it made me...

    When lutiana mentioned the RAM drive it made me realize that I can install the scan77.exe application on my hard drive. That worked fine and I was able to find the STONED virus on the floppy and...
  18. Replies
    9
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    850

    How run SCAN.exe with one disk drive

    I need to run SCAN.exe on some floppy disks. I have the SCAN.exe antivirus program on a floppy disk. When I try to run SCAN A: /A (scan all files on A: drive floppy disk) I do not get a chance to...
  19. I think my HD did have the virus. Before I booted...

    I think my HD did have the virus. Before I booted that eBay game diskette my HD booted just fine and was that way for years. I believe I have the virus on some of my floppies. I will run the virus...
  20. When I got home from work today I turned on the...

    When I got home from work today I turned on the PC XT and got a disk failure message. I tried it a few more times and got similar messages. I received an Advanced Diagnostics diskette from Stone...
  21. The set the active partition in FDISK did the...

    The set the active partition in FDISK did the trick. Thanks for the tip. I am a rookie. Now I just need to figure out why DOS keeps asking for the date and time when I start my computer...
  22. No, well, I am not sure. How do I set this in...

    No, well, I am not sure. How do I set this in FDISK? I do not recall seeing this option/instruction in the FDISK menus.
  23. I went ahead and used DOS 3.2 FDISK to delete the...

    I went ahead and used DOS 3.2 FDISK to delete the existing DOS partition and create a new DOS partition. Instead of 305 cylinders I used 150 cylinders starting at 0. This took a few minutes, but it...
  24. I performed a chkdsk c: and got the following:...

    I performed a chkdsk c: and got the following:
    Probable non-DOS disk.
    Continue (Y/N)? y
    10555392 bytes total disk space
    4096 bytes in 1 directory (I created a DOS directory)
    696320...
  25. Well, I tried the SYS C: command and got the...

    Well, I tried the SYS C: command and got the following message like: No space available. I read my DOS 3.2 manual and it stated that the SYS command needs to have no other files on the destination...
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