Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-28, 19:03

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I thought about this question.. Is it true that the drives on the left side have to removed first before you can remove the units on the right side? Also found out that the right side have more screw holes on the bottom.. (yes it was designed like so that the motherboard is otherwise in the way? A …

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-22, 11:26

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So the 3.5 inch 1.44 MB drive just cant work on a single drive cable in the middle before the twist comes? Does these 3.5 inch 1.44MB drives also have termination and should it be possible to disable that? Most 3.5" newer floppy drives are locked at second ID for "A" after the twist, some have …

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Re: Help fixing rare CL-GD610/620 VGA card

Posted on 2024-04-21, 23:15

by

by Robin4

in Marvin \ Video

in Marvin \ Video

Got a lot of stuff few days ago.. Lot of ICs and eproms.. Google it and found your topic.. Maybe someone else can make a use of it. Probably its the same version as posted.. But all small things could / would help. So why not upload it for you too. And another one, but cant read which version it is …

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 22:39

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thought XTs can't handle high-density at all. I would go with 2 360K drives because that's how my XT used to be, so lots of XT software were built with that in mind. But if the machine had an HDD, typically they'd keep only one 360K drive. 3 or 4 floppy drives doesn't compute with me 😅 and I'd be …

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Re: What brand / computer company used this logo?

Posted on 2024-04-21, 22:34

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for your great posts, that helped me alot. Also all answeres to my questions which matches in the bullseye.

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 22:28

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Find out that you also can do this: So the 3.5 inch 1.44 MB drive just cant work on a single drive cable in the middle before the twist comes? Does these 3.5 inch 1.44MB drives also have termination and should it be possible to disable that?

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 22:05

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I got the 4 way drive controller working. The rule of tumb here is, you cant skip drive C: if you want the 1.44MB drive on the secondary IDC. So you would have A: B: and D: Its only possible to do A: B: C: so HDD would be probably D: If you install a fourth drive.. HDD will be E: Thought i had to …

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 21:24

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting. I wonder how they do more than 2 drives on that card when the main chip only does 2. Maybe the main controller could do actually 4.. Yes 2 drives where the most used. But with a IBM XT CLONE.. you have (if you use half height drives) 4 spaces to install drives in. That changed when the …

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 21:02

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would use the 3.5" floppy as A drive, then add the 5.25". Why: My XT/3 has a 720k as A and the 360k as B so I can easily from any computer with a 1.44Mb 3.5" make bootable or other disks for it if needed. If you use the 360k as A then you need another with good 360k drive AND good 5.25" floppies …

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Re: Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 20:44

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thought XTs can't handle high-density at all. I would go with 2 360K drives because that's how my XT used to be, so lots of XT software were built with that in mind. But if the machine had an HDD, typically they'd keep only one 360K drive. 3 or 4 floppy drives doesn't compute with me 😅 and I'd be …

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Whats the best 5.25inch drive installation configuration in a XT class machine.

Posted on 2024-04-21, 01:11

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a IBM clone look a like, which for me is fine.. Machine will get a 8Mhz Turbo motherboard. Think got 640KB +384KB memory Will have a 4 way techway high-density floppy controller. I dont going to use full height drives, because the space that i would get to use half-height drives means lot to …

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Re: What brand / computer company used this logo?

Posted on 2024-04-19, 17:01

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I dont know this one is: But from the past i remember that logo.. Which company hides behind it? I can 100% comfirm that logo is from MYCOMP.. Got a HDS MFM 8 bit controller today in the lot. Red out the onboard bios. Had the same logo printed out in the PCB. It says really MYCOMP in that bios. I …

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Re: Who regconize this AT IDE controller?

Posted on 2024-04-16, 17:17

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by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are there other users that maybe have an idea what the brand could be.. ? Also found one on this site: https://computer-retro.de/Bilder/Multi-IO/MX1 … -Controller.jpg

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Re: Suntac 80286 Mainboards

Posted on 2024-04-09, 00:13

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can someone tell how to chance the C / H / S / P parametres on drive type 42 till 47.. I dont know how the switch to those columns. Not sure if you got an answer to that or not but if the values are zeros and can't be changed it's probably a BIOS that can't accept custom values. In other words you …

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Re: Suntac 80286 Mainboards

Posted on 2024-04-08, 02:30

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah got it :-) :-) :-) http://www.vogons.org/viewtopic.php?f=46&t=17341&start=20340 This is almost the exact board I was searching for a long time: ST62M02-B. The manual I posted above and belonging to my 1st Computer is a ST62M02-A. I remember the CPU was in standard PLCC socket and the DIPs were …

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Re: Who regconize this AT IDE controller?

Posted on 2024-04-07, 15:39

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When searching on the internet i have found some similiar controller, only with a little bit different layout. But the looks where just the same.

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Who regconize this AT IDE controller?

Posted on 2024-04-07, 15:30

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tried to look for some clues.. Board has markings like: 070-5-0490. But iam guessing 04 - 90 could mean like month 04 1990. Yellow sticker on the board says 9124.. -> 1991 , week 24? Sticker 5? Maybe for batch 5? Or in which factory its been made? But still no brand, no information on the settings …

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Re: Update BIOS in 486 FIC Motherboard: from 64k to 128K

Posted on 2024-04-07, 01:16

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Recently I played around with the FIC 486-GVT-2 mainboard and once I upgraded the BIOS from version 3.07G to the newest (beta) BIOS 3.276GN1 (which includes the Y2k fix), the system had trouble POSTing and booting. This beta BIOS should (according to a note on the FIC FTP site which was posted …

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Re: What brand / computer company used this logo?

Posted on 2024-04-04, 09:39

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Robin4 wrote on 2024-03-18, 00:48: I dont know this one is: But from the past i remember that logo.. Which company hides behind it? Iam not 100% sure. But i think that logo is from MYCOMP Why? Its has some clues which matches with TMC.. But itsnt TMC either.. But seems there where some sub brands.. …

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Re: Suntac 80286 Mainboards

Posted on 2024-04-03, 00:45

by

by Robin4

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Predator99 wrote on 2024-04-02, 15:58: Original file looks better.. Mainbaord-0016r.jpg Iam looking for the whole thing (layout) with the Keyboard controller (8742) on it too. I have to check these vias and traces if they all are working.. And that schematic is very handy for that purpose.

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