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Type: Posts; User: TheDrip

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  1. Replies
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    TopBench says 8086. Yes it's an ebay purchase,...

    TopBench says 8086.

    Yes it's an ebay purchase, a semi-local US seller.

    If this was rebadged they did a very good job of it, as I said the chip passed with alcohol and acetone.

    I have...
  2. I am quite guilty of using the wrong fastener,...

    I am quite guilty of using the wrong fastener, but it's always the correct thread.

    Slot, phillips, allen, truss, button, cap... it doesn't matter as long as thread matches and it's close enough...
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    Alcohol and acetone tests passed. I will take a...

    Alcohol and acetone tests passed. I will take a crack with top bench tomorrow.
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    Additional information, the part number is...

    Additional information, the part number is μPD70116C-5 and the case does not say V30 on it like the later parts.
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    V30 not recognized in PS/2 Model 25

    I have a (wooden cased!) 8525-004 that I bought a V30 D70116 NEC CPU for.

    I have installed the processed and the machine works just fine, but with none of the added features of the V30

    MSD and...
  6. Thread: free stuff

    by TheDrip
    Replies
    21
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    780

    Glad someone took it. I was about to "get...

    Glad someone took it.

    I was about to "get lost" and "ask for directions from the guy in that house right there" with my wife in the car, and somehow end up with a mini full of old computer bits. I...
  7. Thread: free stuff

    by TheDrip
    Replies
    21
    Views
    780

    Morro bay is a few hours south, closer to SLO and...

    Morro bay is a few hours south, closer to SLO and Pismo. Unless I'm way off. Everything north of LA is norcal to me!
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    I cant tell the difference, can you? 8525 on...

    I cant tell the difference, can you?

    8525 on the left. 8086, monochrome screen and wood case.
    8525-286 on the right. 80286, VGA screen and original plastic case

    66794
  9. Well I found a cheaper (maybe) method for hooking...

    Well I found a cheaper (maybe) method for hooking up a gotek to an early PS/2

    Instead of spending money on adapters, I used a regular old fashioned 40 pin IDE cable.

    Pins 1-34 are the same...
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    Tektronix for that good second hand scope...

    Tektronix for that good second hand scope feeling. Congratulations on a steal!

    I stumbled on a TAS220 locally for $25 a few years ago. About as feature rich as a pair of socks, but I will probably...
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    Have you verified the extra address pin is pulled...

    Have you verified the extra address pin is pulled low?

    Alternatively you could try writing the 2K image twice to the chip so it has images in both halves of the eeprom
  12. Thread: free stuff

    by TheDrip
    Replies
    21
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    780

    The mini cooper with 2 people and a week's worth...

    The mini cooper with 2 people and a week's worth of luggage disagrees with it as well unfortunately.

    At this point it's not about money anymore, it's about space usage. My hobbies are starting to...
  13. Thread: free stuff

    by TheDrip
    Replies
    21
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    780

    I will be in the area in 2 weeks, unfortunately...

    I will be in the area in 2 weeks, unfortunately with a wife on our annual roadtrip up the coast from SD to SF. I would take everything but she wont let me!
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    I still program in a dialect of BASIC on a weekly...

    I still program in a dialect of BASIC on a weekly basis for work. VBA behind MS Office (Excel specifically).

    It's really stretching the definition of BASIC, but it's a dialect nonetheless. .
  15. Replies
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    PS/2 Model 25 Wooden case

    What do you do when you have a CRT/chassis/power supply and an 8086 planar, but the rest went into building your 25-286?

    You spend an hour in the garage with a circular saw and a drill and make a...
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    It's quite likely that they have fallen victim to...

    It's quite likely that they have fallen victim to the same problem as so many other shippers recently.

    The volume being shipped has been higher than christmas rush levels, for 10 months straight....
  17. Sergey 8088 Oak 077 VGA card V20 at 9.55 Mhz 3...

    Sergey 8088
    Oak 077 VGA card
    V20 at 9.55 Mhz
    3 loops measured 91 ticks.

    IBM PS/2 Model 25-286
    onboard VGA adapter
    286 at 10MHz
    9 loops measured in 91 ticks
  18. Essentially, it's plug the drive in and hope....

    Essentially, it's plug the drive in and hope. Some drives work, some planars work.

    I never tried with my 8086 machine and it's blown up into pieces right now.
  19. They do not support 1.44 officially but there are...

    They do not support 1.44 officially but there are a couple of ways to work around that.
  20. I cheated and spent $15 instead of modifying the...

    I cheated and spent $15 instead of modifying the stock floppy cable

    https://texelec.com/product/ibm-ps2-to-standard-floppy-adapter/

    You will need to flash the gotek with Flashfloppy, the stock...
  21. And solved it. Jumper needed on J5 for PS/2 to...

    And solved it. Jumper needed on J5 for PS/2 to recognize the gotek as high density. Also solved my chicken and egg problem of getting the starter disk to boot. I had worked around that by booting...
  22. More information. If I select a 1.44M image,...

    More information.

    If I select a 1.44M image, Checkit says no disk is present
    If I select a 720K imgage, Checkit will recognize the disk, but has a Read error on 100% of the Random reads tried.
  23. CheckIt is reporting the drive as 3.5" 720K, that...

    CheckIt is reporting the drive as 3.5" 720K, that seems like an issue.

    I have reset the PS/2 bios settings more than once, same results!
  24. PS/2 Model 25-286 & Gotek (FlashFloppy) issue

    Hello all!

    I have my Model 25 updated a little bit. It started as a monochrome 25-001, now in the same skin but sporting a color display and 30-286 motherboard as well as an XTIDE-lite to replace...
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    Are you guys browsing from work? I too can...

    Are you guys browsing from work?

    I too can stay logged in for weeks from my home computers and my phone, but will be logged out in minutes if using my work machine through the VPN. It seems like...
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