Re: M219 V 1.1 and Copro (287XL) problem

Posted on 2020-08-05, 17:22

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks like a PCCHIPS SHART Chipset My only thought is that the board may be trying to overclock the coprocessor, Other oddity is the 25mhz cpu with a 40mhz crystal Could try to under clock the board and see if it works, if not your stuck with the random examination to make sure there are no broken …

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Re: ATI Color Emulation Card

Posted on 2020-08-04, 17:44

by

by rmay635703

in Marvin \ Video

in Marvin \ Video

All I remember about the card was that it was small for the 8 but era, had a small bank of ram and a metal toggle switch to the outside of the case. I will need to dig and see if I can find it with the kaypro stuff

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Re: ATI Color Emulation Card

Posted on 2020-08-03, 17:10

by

by rmay635703

in Marvin \ Video

in Marvin \ Video

Nope, no photo or diagram exists (as far as I know). Are there any identifying marks or labels on the card like a model # or name? The card in question would not display Hercules graphics even on an MDA monitor (Only CGA) and I found it to be sorta useless. (since I had Hercules, IBM EGA and …

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Re: ATI Color Emulation Card

Posted on 2020-08-03, 15:54

by

by rmay635703

in Marvin \ Video

in Marvin \ Video

Does anyone have a photo of the color emulation card (or a B&W) I may have (had) this card in my stash when I got the guts from a trashed kaypro ISA planar with an XT single board pc planar If memory serves it was a rather simple 8 bit card with a toggle for MDA/CGA, if anyone has a photo or diagram …

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Re: Budget Isa with windows acceleration

Posted on 2020-08-02, 23:00

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by rmay635703

in Marvin \ Video

in Marvin \ Video

At least drawing functions for Windows etc will accelrate 3.x, also adding a FPU helps with 3.x Are there any official old discussions/review that Win 3.x and 9x actually benefit from the FPU? I mean some bench or official technical talks on it? It's something interesting I'd like to know. Sure …

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Re: Is Cache Tag size to be seen as minimum or exact value

Posted on 2020-08-02, 14:49

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, So I installed now 512 and 1024. Both sizes are being displayed correctly in the post boot screen but the system then hangs. It will in both cases only boot if external cache is disabled again. Question now is of course whether this is due to wrong Tag ram size or due to bad Chinese iss …

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Re: Dot matrix and early inkjet print quality:

Posted on 2020-08-01, 17:27

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That was incredibly helpful. Two other issues. One, images often don't fill the page, or occasionally, will exceed the page. There doesn't seem to be an enlarge/scale option in the Windows print drivers. Did people have a way of printing graphics expanded to fit the page? NP And you are correct …

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Re: Dot matrix and early inkjet print quality:

Posted on 2020-08-01, 15:07

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Driver quality was all over the map in the 3.1 era (even in the 98 era) That is why some programs like Superprint or photoshop would allow you to directly choose the dithering mode. Even my old Rainbow Dot Matrix has Coarse Fine Error diffusion In the printer setup Most printers stuck with coarse …

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Re: Modifying the POD83's voltage regulator for overclocking

Posted on 2020-07-30, 00:04

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

sliderider wrote on 2015-11-16, 03:37: Also, has anyone managed a 66 x 1.5 multiplier run yet? You would need to decap the pods die but my guess is there is no circuitry. If all pods had the same die with the Future POD DX4 overdrive In mind it’s possible 4x was hidden in there (albeit completely …

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Re: Were CD-ROMs common on 386 computers?

Posted on 2020-07-28, 20:01

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Most every cdrom equiped AST computer from the early to mid 90’s came with a Windows 3.1 CD of sorts, you could either restore to factory defaults or generate Windows 3.1 setup disks off the cd utility

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Re: How can you obtain 100% legal copies of DOS and older versions of Windows?

Posted on 2020-07-28, 17:59

by

by rmay635703

in Marvin \ Software

in Marvin \ Software

He was providing discs for a fee and went out of his way to copy the original look of Dell recovery disc, which is quite deceiving. I have mixed opinions on that one, if you copy something that has ABSOLUTELY NO VALUE. You likely should be able to provide it at no cost or just enough to cover …

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Re: Fastest sdram system?

Posted on 2020-07-28, 11:17

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had a socket 7 board that came with PC166 168 pin sdram Slight overclock on the bus speed I would guess a system with such ram running at a higher bus speed would be the best Yeah but when was it ever confused when DDR ram came along? Thats the point im getting at I don’t think anyone has ever …

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Re: List of rarest PC soundcards

Posted on 2020-07-27, 21:26

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by rmay635703

in Marvin \ Sound

in Marvin \ Sound

Do the multitudes of obscure early 80’s Speech Synth cards that fit an ISA slot Count as a sound card? They makes sounds. IBM VCA/Speechsynth and the original TI Speach cards come to mind

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Re: Were CD-ROMs common on 386 computers?

Posted on 2020-07-27, 13:22

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

386 systems usually would come with a 5.25in floppy drive, a 3.5in floppy drive and perhaps a 5.25in 20MB HDD Seriously? I've never seen a 386 with a 5.25" 20MB HDD. Such disks were typical in XTs, sometimes also found in 286 machines - though in this case 40MB ones were more popular. In a 386, …

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Re: How can you obtain 100% legal copies of DOS and older versions of Windows?

Posted on 2020-07-26, 17:59

by

by rmay635703

in Marvin \ Software

in Marvin \ Software

I have seen CD based Windows 95, Windows 98 SE and Windows XP retail media with COA , product key and sometimes even in original packaging in thrift stores . This is probably the least expensive legal route for those, if you are lucky enough to find what you want . This brings up a point. Do you …

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Re: How can you obtain 100% legal copies of DOS and older versions of Windows?

Posted on 2020-07-26, 17:47

by

by rmay635703

in Marvin \ Software

in Marvin \ Software

I have found retail copies on eBay of Windows 3.1 in big box PC form. What I'm not sure of is what the limitations are in installing it on a retro PC build. One idea I had was to install it on FreeDOS using JEMU386 support. This stuff is such a headache though. I wouldn’t worry about it if you have …

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Re: How can you obtain 100% legal copies of DOS and older versions of Windows?

Posted on 2020-07-26, 17:33

by

by rmay635703

in Marvin \ Software

in Marvin \ Software

This is the problem with Disney’s software, copywrite and patent law as it stands. It is ripe for holding companies to camp out on others work’s not for the purpose of sales but instead for lawsuits. I strongly believe Reforms are needed in cases of long distant “owners” enforcing rights without any …

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Re: Anyone can identify this 286 motherboard?

Posted on 2020-07-25, 17:33

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

We used to hook a large battery to the bad supply lines and watch for what explodes then fix. Of coarse I had an unlimited supply of free bad boards and would only fix the easy ones. As long as the power isn’t for too long the worst thing is a blown trace to a bad component. We used to blow traces …

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Re: Were CD-ROMs common on 386 computers?

Posted on 2020-07-25, 15:25

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would say that before 1992 any PC with a CD-ROM drive was rare. 1992-1993 it was uncommon, but there were some multimedia 386s being offered by OEMs. To be fair, before 1993 not many people had PC compatibles in their home anyway (too expensive). The 486 boom started in late 1992 when the DX/2 …

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Re: Is there any way to use all the space on a hard drive larger than 2gb on MS-DOS 6.22?

Posted on 2020-07-23, 19:08

by

by rmay635703

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

http://www.vcfed.org/forum/archive/index.php/t-39926.html

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