Teac FD-55GFR can read floppies fine, but can't format or write

Posted on 2022-07-20, 19:00

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I have a Teac FD-55GFR 5.25 floppy drive (1.2mb) which I purchased for a Windows 98 PC with USB mass storage support, it acts as an intrerim PC for moving data from USB to floppies/zip disks to then move to older systems. After a minor cleanup, the Teac reads disks written on other systems …

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Socket 3 motherboard won't post D3 memory

Posted on 2022-05-25, 17:05

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by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Back again with another ebay special, I have a VL/ISA-PB486P3 (as on Stason.org ) The board is in very good condition, I can't find any corrosion or broken traces and it comes with an AMI Winbios. I've tried it with a known working SX25 and Overdrive 100 (jumpers set appropriately) and various …

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Re: Toshiba T1200 FDD reads, but won't boot

Posted on 2022-02-24, 21:56

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The T1200 is trying to boot from the floppy drive as it's showing the non system disk error and the drive works/disk is readable once the laptop boots; this would imply to me that the boot disk isn't bootable, or isn't compatible with the laptop. Which boot disk image are you writing to the boot …

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CT4500 AWE 64 synthesized music results in loud hiss

Posted on 2022-02-24, 19:30

by

by thevdm

in Marvin \ Sound

in Marvin \ Sound

Hi all, I have a CT4500 which I've installed in a PC running DOS 6.22 & Win 3.11. The PC is roughly period correct, DX2 66, 16 MB RAM, Trident VLB etc... if anything the sound card is the modern part. The card operates perfectly fine as a SB16 WAV device, whenever I attempt to run anything that uses …

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Re: Trident TVGA9200CXR no video output when win3.11 loads

Posted on 2022-02-19, 11:50

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Quick update. I've managed to get this card working. I had to install a TVGA 9200 Dos driver which then allowed the card to load Windows 3.1 correctly. The Windows driver alone doesn't work, instead both the Dos and Windows drivers are required. Although a seperate site, is there a way to register …

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Re: Trident TVGA9200CXR no video output when win3.11 loads

Posted on 2021-12-04, 10:58

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Apologies for the delay and thank you all for your help. I've attached a photo of the card with the jumpers labelled, there is a list of the jumpers here - https://stason.org/TULARC/pc/graphics-cards/P-R/PROLINK-COMPUTER-INC-XVGA-TVGA9200CXR.html the card listed on Stason is slightly different …

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Trident TVGA9200CXR no video output when win3.11 loads

Posted on 2021-12-03, 16:08

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I have a Trident TVGA9200CXR video card for a DX2 66. The graphics card works perfectly in DOS mode and with games like Doom/Wolf3D, it even works fine for installing Win3.11. When loading Win3.11 I get the splash screen followed by the monitor showing a no signal message then going to sleep …

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Re: 5 1/4 floppy drive jumper settings (Mitsubishi MF504C-318UG)

Posted on 2021-09-25, 17:34

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Horun, Thank you for your answer, I have moved the SR jumper to DC, unfortunately this made no difference to the behaviour of the drive. Many thanks Jim

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5 1/4 floppy drive jumper settings (Mitsubishi MF504C-318UG)

Posted on 2021-09-25, 16:29

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I have a 5 1/5 floppy drive that I would like to use in a 486 build that I'm working on. The drive I have is a Mitusbish MF504C, 1.2M. When the computer posts and checks the floppy drives the head moves as expected and no errors are displayed. Once Dos has loaded, selecting drive B results in …

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Re: Post sticking on "FF 2A"

Posted on 2021-09-08, 18:12

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by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Cyclone3d, Thank you for the suggestions, I reseated the cache chips after making the original post (sudden thought), unfortunately this made no difference. I'll pull some known working cache chips from the loft this weekend as I don't know any history for the currently installed ones. I tried …

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Post sticking on "FF 2A"

Posted on 2021-09-08, 17:31

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I picked up a cheap Socket 3 M918i (I'm fairly sure it's an M918i) motherboard that was listed as being for parts. The board it'self looks to be in fairly good condition although has a slight curve to it. With a post card inserted it stops on "FF 2A" 9 times out of 10 with nothing on the screen, …

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Re: Does this sound like a Voodoo or MB problem?

Posted on 2021-03-16, 18:58

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had similar issues when setting up an AGP Voodoo3 3500 in Windows 98. The control panel would crash whenever opened. I downloaded a few different version of the driver and eventually one worked perfectly. As you are having issues with the PCI Voodoo and the sound card, I'd check you have the …

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Re: 486 Motherboard POSTs then freezes

Posted on 2021-03-12, 21:22

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Final update on this one, switched the keyboard controller chips and the board works perfectly. Very happy it's the cheapest/easiest component to switch. Thank you all for your help.

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Re: 486 Motherboard POSTs then freezes

Posted on 2021-03-09, 19:57

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've not tried switching the BIOS or keyboard controller yet, that is in the plans for this weekend when I have more time. It is possible that either of these are the cause of the issue. If it's the BIOS I'll have to get hold of an EEPROM programmer, it would be nice to have a backup anyway as I …

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Re: 486 Motherboard POSTs then freezes

Posted on 2021-03-09, 18:48

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Update: I found another Jac-Up3 board on ebay which arrived today and works perfectly, I've also ordered some replacement capacitors as if I can fix the original board it wouldn't hurt to have a spare. This 486 build is getting to be an expensive one, but it being the same make/model as my very …

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Re: 486 Motherboard POSTs then freezes

Posted on 2021-03-06, 14:50

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've tried with the cache disabled and removed, this gives the same results (just to confirm L2 SRAM and Cache are the same?). The tantalum caps could be the cause, although they visually look good, visually and electrically good are very different. I guess it might be worth noting all the capacitor …

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486 Motherboard POSTs then freezes

Posted on 2021-03-06, 11:39

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I have a 486 motherboard that posts successfully and freezes shortly after handover. Model: DT-Tornado2 / Jac-Up3 POST will complete, DOS will start to load from a floppy and it will freeze. I don't think it's related to DOS or the floppy drive etc... as the same happens when I enter the BIOS …

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Re: Jumper information for DT-Tornado2 motherboard

Posted on 2021-03-06, 11:24

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Should it help someone else in the future I have created a motherboard diagram to go with the tables posted above.

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Re: Jumper information for DT-Tornado2 motherboard

Posted on 2021-03-01, 17:27

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I've just finished work and have to say I am very impressed with these two answers. I wasn't expecting something as comprehensive as this so quickly! This has made my day :D It looks like knowing the boards were called Jac-Up boards is the key. I'll organise all this information into a PDF so it …

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Jumper information for DT-Tornado2 motherboard

Posted on 2021-02-28, 21:37

by

by thevdm

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I have finally purchased a similar model computer to the very first PC I owned, a Viglen Genie Executive. (This one is a bit more specced out than the one I had back then). The motherboard in this computer is a DT-Tornado2 (By DD & TT), I've not been able to find any information on this …

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