Re: Cyrix 5x86-133 - "DIVIDE OVERFLOW" error on boot.

Posted on 2019-10-23, 02:13

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://i.imgur.com/KmFnjuH.jpg https://i.imgur.com/htXRviF.jpg This is the first time I've taken off the cooling fan and it looks like this is the 100MHz version, not the 133. So this site is just wrong about the G5FB607B? http://www.cpushack.com/cyrix-486-cpus/ Regardless, the interposer thing is …

---

Cyrix 5x86-133 - "DIVIDE OVERFLOW" error on boot.

Posted on 2019-10-22, 11:50

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I was given a Cyrix 5x86-133 and decided to test it today. The only 486 board I currently own is from a Japanese IBM motherboard that is only really identified by the part number 66G3602, I believe it's out of an IBM PS/V Type 2410 PC. It came with a 486DX2 66MHz and has been working perfectly since …

---

Re: Trying to adapt a standard 34-pin floppy drive to 40-pin IBM PS/2 edge connector, won't read 1.44MB disks!

Posted on 2019-10-17, 13:41

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jordan, Have you ever found a solution to this? I have tried EVERYTHING everyone's posted about making this work on a PS/2 model 55sx with no success. I've tried the resistors on pins 8, 26, 28, 30, 34 to 5v, no luck. I've tried using power off the power supply to power a floppy drive, tried …

---

Re: Bought these (retro) hardware today

Posted on 2019-09-06, 05:27

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

also this cute thing :3c hardware29_03.jpg it's astonishing what they crammed in there, even place for a 8bit ISA card :) hardware29_04.jpg unfortunately the PSU is missing, but that shouldn't be too hard to figure out... but it also seems like someone already had a go at this, the front had a …

---

Re: Advantech PCM-9375 - how do you connect a floppy drive to this thing?!

Posted on 2019-09-01, 15:04

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It does look like it requires the extra module, but why not try using a USB floppy? It looks like it's new enough to have native support for that, but I guess not as ideal because it's not a direct floppy controller. I've always had bad experiences with USB floppy drives. They never work quite …

---

Re: Advantech PCM-9375 - how do you connect a floppy drive to this thing?!

Posted on 2019-09-01, 03:15

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Apparently the PC-104 port is both a floppy header and a printer header, and the module determines what it use. regular PC/104 is just ISA on a pin header according to this: https://www.infinite-electronic.sk/datasheet/92-PCM-9375FZ2-J0A1E.pdf the part number listed above is most probably what you …

---

Re: Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-09-01, 02:12

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mine has discoloration on the corners but works fine, the discoloration is annoying though. You might be able to fix that with a degaussing wand, there are some cheap Chinese ones on eBay. Just make sure you don't keep it on for more than around 30 seconds otherwise it'll melt itself and then your …

---

Re: Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-08-31, 10:42

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

dr.ido wrote: Looks like you're in Australia - If you are anywhere near Oakleigh, Victoria I'll probably have some 14" left over after I am done with them. Nope, sorry - Sydney. Thanks though.

---

Re: Advantech PCM-9375 - how do you connect a floppy drive to this thing?!

Posted on 2019-08-31, 10:41

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

you could probably just get any PC/104 floppy controller maybe the mentioned floppy module is just that? can't find any picture of it: https://www.digikey.com/product-detail/en/advantech-corp/9696937580E/9696937580E-ND/5638943 I found that page too, but I can't tell if that's even what I need …

---

Advantech PCM-9375 - how do you connect a floppy drive to this thing?!

Posted on 2019-08-31, 06:25

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hey all, I recently bought one of those Advantech PCM-9375 single-board industrial computers and am trying to figure out how to connect a floppy drive to it. It has a few different connectors on it, but none of them are the standard 2 row 34-pin header for floppy drives. http://advdownload.advantech …

---

Re: Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-08-31, 04:45

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mine has discoloration on the corners but works fine, the discoloration is annoying though. You might be able to fix that with a degaussing wand, there are some cheap Chinese ones on eBay. Just make sure you don't keep it on for more than around 30 seconds otherwise it'll melt itself and then your …

---

Re: Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-08-31, 01:41

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It may be possible, but I wouldn't bother - Surely it can't be that hard to find a CRT TV of some description. I've picked up 10 for a project in past week - all were put out on the street for rubbish. Even in a PAL country most CRT TVs from the late 90s onward will accept an NTSC signal (from the …

---

Re: Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-08-29, 14:41

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There is no PAL Apple IIe composite color monitor - The color composite monitor sold with the platinum Apple IIe is NTSC, but color burst frequency is somewhat off from normal NTSC. You won't get color from a platinum "international NTSC" Apple IIe on a normal NTSC TV and you won't get color on the …

---

Apple IIe Colour Composite CRT Monitor - no colour (sort of?)

Posted on 2019-08-28, 22:51

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hey all, I have a PAL Apple IIe Colour Composite CRT monitor that's acting strangely. It's refusing to display in any colour but one, aka. it's monochrome, but I can change the overall colour using the bias adjustments pots inside of the case. Take a look: https://imgur.com/a/b4Oy2LQ/ I've tried it …

---

Re: IBM 8503 Monochrome VGA Monitor Help

Posted on 2019-08-26, 07:53

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is a little late, but that sounds like bad caps. If you still have the monitor, and possess some soldering skills, you should open it up and see if there are any obviously bad capacitors. Be careful to discharge the caps before handling them, however, as they can hold a lethal shock. I got fed …

---

Trying to adapt a standard 34-pin floppy drive to 40-pin IBM PS/2 edge connector, won't read 1.44MB disks!

Posted on 2019-03-07, 14:20

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hey all, I've been trying to replace the dead FDD in this Japanese IBM PS/55 (essentially IBM Japan's PS/2, it's a 386 MCA machine) and am having trouble getting it to read 1.44MB disks. https://retrocomputing.stackexchange.com/questions/3237/is-it-possible-to-adapt-a-standard-pc-floppy-drive-to- …

---

Re: Commodore 128 - No chroma/luma video output? Help!

Posted on 2019-02-20, 11:38

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Was the 80-column output actually accessible on the composite output? Iirc back then only 40 (at most 64) chars/line were considered acceptable when using composite color, because of its low color bandwidth. Maybe the C128 detects whether a 1901 is connected via RGBI, and uses a different frequency …

---

Commodore 128 - No chroma/luma video output? Help!

Posted on 2019-02-20, 05:49

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hey all, I recently bought a Commodore 128 with a 1901 monitor and can't seem to get it to display anything using a chroma/luma/audio cable. Whenever I try using the cable it displays some intermittent flashing diagonal-ish stripes of colours (looks like green and purple mostly) that eventually sort …

---

Re: IBM 8503 Monochrome VGA Monitor Help

Posted on 2019-02-20, 05:47

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No problem, always happy to help! Besides, I love a good puzzle. lol Thanks to your help, I got it to work! And then it promptly stopped working... the image pretty much flickered out and disappeared entirely a few minutes after I finished soldering the wire and tested it for the first time. I …

---

Re: IBM 8503 Monochrome VGA Monitor Help

Posted on 2019-01-31, 11:37

by

by Durandal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Based upon a VGA pinout I've found on the internet and the silkscreen on the board, the pinout appears to be this: 5 pin connector, from the left side of the picture to the right: HS (white wire) - Horizontal Sync, VGA pin 13 VS (yellow wire) - Vertical Sync, VGA pin 14 SC (thin black wire) - See …

---