Re: Programming the VGA chip in C/C++ for 16 bit DOS - help writing my own routines

Posted on 2019-08-22, 09:26

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd say, work through these tutorials first and try to make a basic game with that knowledge, say a simple Tetris clone: http://www.brackeen.com/vga/ Then dive into Part II of Michael Abrash's Graphics Programming Black Book: https://www.phatcode.net/res/224/files/html/ch23/23-01.html Just keep in …

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Re: CGA Graphics library

Posted on 2019-08-20, 21:05

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by pan069

in Milliways

in Milliways

I went by cycle counts in the 8086 book, but I doubt they are always correct. It was only a 1 or 2 cycle saving based on their figures, but it was probably a waste of effort. Just skimming over this thread; going by cycle counts from manuals to gauge performance is usually not a good idea. Those …

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Re: Suggestion to supercharge a 286 Olivetti

Posted on 2019-08-20, 11:12

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

AlessandroB wrote: Frend gift me this computer: Olivetti M290-20 I had this model in the early 90's. A fine little machine. A few years ago I asked parents if I could pick it up (assuming it was in attic). Unfortunately I learned that my parents tossed in a dumper not long after I had moved out of …

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Re: Retro PC Case

Posted on 2019-08-12, 02:08

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by pan069

in Marvin \ System Specs

in Marvin \ System Specs

Why is the PSU area so large? I assume the PSU sits at the top, what's the space underneath it for? Fan?

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Re: NuXT - micro-ATX IBM XT (LGR review)

Posted on 2019-08-09, 07:51

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

hasnopants wrote: a 5.25 floppy emulator. I wonder how you imagine this to work... I mean, since a gotek just lets you write different sized disk images...

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Re: Games that benefited from having a NEC V20?

Posted on 2019-08-04, 00:25

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are you sure for Wolf 3D ? I thought it needed a 286. It doesn't use 286 specific instructions. An 8088 is a 16 bit cpu on an 8 bit bus. Similar to how a 386sx is a 32 bit cpu on a 16 bit bus. For games, the bus is usually the bottleneck but a higher cpu speed also give you a slightly higher bus …

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Re: Voltage fluctuations on ASUS P5A-B

Posted on 2019-07-29, 08:53

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had to tear down the set up so I'm not able to test if the power connector gets hot and it might be a while before I can set it back up. However, I tore it down directly after turning it off and I don't recollect anything out of the ordinary in terms of heat. I don't recall the power connector …

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Re: Old game and demoscene demo captures on real hardware

Posted on 2019-07-28, 11:56

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah, OK. I thought the idea was period demos on period hardware (more or less). But, yeah. If it works, it works... 😀

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Voltage fluctuations on ASUS P5A-B

Posted on 2019-07-28, 10:23

by

by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On my ASUS P5A-B motherboard I have noticed that when I go into the BIOS under Power Management Setup, I can see that the +5 and +12 volts are regularly erroring. This is actually my build: https://www.vogons.org/viewtopic.php?f=46&t=39993&start=12380#p773249 Just a simple set up with a hard drive, …

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Re: Old game and demoscene demo captures on real hardware

Posted on 2019-07-28, 07:47

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

arncht wrote: Orange - X14 (1995) demo on retro PC Orange - Megablast (1996) demo on retro PC Hardware a little bit to high end for '95-'96?

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

Posted on 2019-07-28, 04:45

by

by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Come to think of it, I may recall seeing retail boxes with "Creative" logos all over them and disks and manuals, but the actual PCB branded Ensoniq. Within a few years of Ensoniq's purchase by Creative. That's probably it. Must have been something like this. This is a PCI version though. Seems that …

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

Posted on 2019-07-28, 01:37

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

liqmat wrote: Have no clue. I can't check the other cards either because I sold them off cheap to other Vogons members. Actually, it's probably just a QA thing. Mine just got two stickers instead of one...

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

Posted on 2019-07-27, 21:37

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not sure how I didn't know an Ensoniq-branded Voodoo card existed. Cool! A few of those turned up in the Pentium Pro haul as well. ensoniq_banshee.jpg What I find intriguing are the green stickers on the memory chips. Yours seems to have one, mine has two. Any idea what the meaning of the green …

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

Posted on 2019-07-27, 05:55

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I got my ASUS P5A-B with K6-2/450AFX up and running (https://www.vogons.org/viewtopic.php?f=46&t=68284). After I assembled all the parts on the living room table (to great disgust of my wife), I had some issues with the hard drive initially. I was using an 80GB 2.5" Seagate (got a bunch of …

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Re: AMD K6-2/450AFX voltage settings

Posted on 2019-07-26, 13:29

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks guys!

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Re: AMD K6-2/450AFX voltage settings

Posted on 2019-07-26, 13:08

by

by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's a bit difficult to see on this photo (actual chip), but it says "2.2V CORE/3.3V":

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Re: AMD K6-2/450AFX voltage settings

Posted on 2019-07-26, 12:55

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks. It's all a bit new territory for me. I'd rather double check than blow shit up 😀

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AMD K6-2/450AFX voltage settings

Posted on 2019-07-26, 12:42

by

by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi have a K6-2/450AFX that I'd like to stick on my ASUS P5A-B. However, the chip says on the front 2.2V but the manual says 2.4V: Manufacturer CPU Type Single Plane Dual Plane VID0 VID1 VID2 VID3 AMD (.25micron) K6-III/400,450 ---- 2.4V(Dual) [1-2] [1-2] [2-3] [1-2] K6-2/450,475 AMD (.25micron) K6 …

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Re: Motherboard Suggestions for 486 DX4 100Mhz?

Posted on 2019-07-25, 11:42

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

derSammler wrote: PC-Chips M919 as well, which was already mentioned earlier. Ah OK. I missed that. A quick Google search on this board seems that it might have a problem with fake cache?

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

Posted on 2019-07-25, 11:32

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by pan069

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Result of three evenings soldering after putting the children to bed: https://tweakers.net/ext/f/xxug2z4Oaga6DgU1BDA7sSyg/full.jpg Works perfectly too :) Fantastic. I hope to get mine soon. Haven't soldered in decades but looking for forward to getting my hands dirty. I might actually order one of …

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