Re: How to install DOS Plus (PC1512 version) ?

Posted on 2017-11-04, 03:15

by

by BitWrangler

in Marvin \ Software

in Marvin \ Software

IDK, all I remember is I had a 40MB "hard card" in mine partitioned 32MB and 8MB and don't remember particular troubles... but that's a 25 year rusty memory. Edit: Oh here's a thought, I remember one of the original disks setting up a RAM drive, not sure if something is amiss with that using an …

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Re: Bought these (retro) hardware today

Posted on 2017-11-04, 02:39

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Classic ...

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Re: What retro activity did you get up to today?

Posted on 2017-11-04, 00:08

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not using that, but I did use the case turbo button to directly operate on clock jumpers, and multipliers before (Switched it between them to try) and it didn't seem to mind that the short was now a 20 inch round trip.

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Re: What retro activity did you get up to today?

Posted on 2017-11-03, 14:10

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

luckybob wrote: 8-bit 4 floppy 1.4mb controller for XT <= i'm probably keeping this one I'm a retard and let one of those slip from my possession a ways back.

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Re: Need help fitting long command line

Posted on 2017-11-03, 00:31

by

by BitWrangler

in DOSBox General

in DOSBox General

Can't you just CD up the tree a bit before that line, reduce total length? Contrary to your criticism, inserting environment variables in commands does not work from the prompt in real DOS; it only works in batch files. So in terms of compatibility with DOS, official DOSBox gets it right and Daum …

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Re: Question regarding 8-pin jumper

Posted on 2017-11-03, 00:25

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd just use loops of solid wire.

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Re: Upgrading 286 RAM : what chips to buy ?

Posted on 2017-11-02, 18:18

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Buying 36 of these chips seems to be quite costly. I think I'll wait a bit or try to salvage something that uses that kind of chip ... Yes, not near as much as when they were new though, could be paying $25 a chip then. Often, 16bit ISA expansion boards have that RAM on, in a 286 they're not really …

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Re: 3.3V AT power supply connector?

Posted on 2017-11-02, 14:20

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Acer liked to do that. and yah ^^^^ double check that, Acer also had funky wired "AT" connectors.

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Re: budget "486s"

Posted on 2017-11-02, 14:17

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Doom required a few memory management tricks to start with only 4MB, especially considering I knew little about computers at the time. There was some boards around, thankfully few, that were right bastards for Doom or getting linux to boot, they insisted on grabbing some of the UMA for their own …

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Re: BSOD on Win98 system

Posted on 2017-11-02, 14:02

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by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've had BSOD issues with a multitude of hardware, in a multitude of windows versions, with the windows screensaver, I think it's just crappy programming. Probably something to do with the GDI.exe stack overflowing. You'll boot and be good for half a day maybe, but after several hours, several …

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Re: budget "486s"

Posted on 2017-11-02, 13:05

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh right.... you'd probably be better off finding the "486" upgrade chip first, there was 286 versions as as well as 386 versions and a 386 PLCC packaged one. The manufacturers I remember using them were Zenith Data Systems and IBM, some of their late 386 ranges had a "486" option. Although I'd say …

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Re: budget "486s"

Posted on 2017-11-02, 02:41

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I built one in '96 for $20 out of the junk boxes under the tables at computer fairs, everything a buck or two. Was a pine technology VLB board, LIF, 5V only, stuck a DX33 in it, used VLB i/o card, actually the $1 one turned out to be "too good" had 16550 UARTs on, so swapped that for the one in my …

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Re: Upgrading 286 RAM : what chips to buy ?

Posted on 2017-11-02, 01:07

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Probably the 18 pin 1M ones on the 4th page of this... http://matthieu.benoit.free.fr/cross/competitive/oki/OKI_Memory_cross_reference.pdf But that's something of a half educated guess. You've got 36, so I guess that includes parity, buggers aren't laid out where it's easy to tell the banks, so you …

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Re: Bought these (retro) hardware today

Posted on 2017-11-02, 00:54

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I was told these have a weird amount because back in the day when ram was scarce Eagle Memory used to combine what they can to make whatever they could so they could sell them. So they would use sticks with bad memory and only use the good parts of it. Also, someone who bought one said their board …

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Re: How to detect if cache is real or not?

Posted on 2017-11-02, 00:15

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

but stainless steel needle, that is actually a good idea. You heat up the solder or you heat up the needle? then you push and should be on the other side easly. Bit of both I guess, hold needle in needlenose pliers or locking forceps, have iron tip kind of sideways on the hole so it touches needle, …

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Re: What retro activity did you get up to today?

Posted on 2017-11-01, 22:45

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

With a lot of alcohol and careful scrubbing I was able to completely remove the rubber coating from an IBM think pad 760 Palm rest. Unearthed the matte plastic, now completed sticky free. https://i.imgur.com/v8ZdpSNl.jpg I hate that stuff, only thing that makes it nicer than napalm is that it isn't …

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Re: How to detect if cache is real or not?

Posted on 2017-11-01, 16:03

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

that is easy, the hard part is removing the solder that is inside the holes sometimes it is almost impossible to do 1 hole, and that has 252 holes Sometimes I use a stainless steel sewing needle, solder doesn't stick well to it, heat it and poke it. However, do you know a discount dollar/pound shop …

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Re: Motherboard Recommendations for P3

Posted on 2017-11-01, 14:45

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The lowkey version of the P2B is the P2-99, might not be going for quite so much yet... http://www.dansdata.com/P299.htm

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Re: Asus rampage extreme 775 worth it?

Posted on 2017-11-01, 13:45

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any motherboard will eventually display reliability issues under hard overclocking... Very true, but some take overclocking better then others. Depends what you're doing also, the board can be designed to do 150W CPUs at 1600mhz fsb, and it's not even breaking a sweat if you get your 65W 1333 fsb …

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Re: How to detect if cache is real or not?

Posted on 2017-11-01, 13:35

by

by BitWrangler

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nah, just get some fine point side cutters and go snip snip snip along all the pins and do them one by one.

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