Search \ VOGONS

Re: Bandwidth of the pc game port?

Posted on 2019-04-08, 22:42

in Milliways

you cant just multiply 4 bits by ISA bus frequency and assume that to be the max >For theoretical max it should come down to max port polling rate of the four button pins. you need to waste cycles/bits on synchronization

Re: Bandwidth of the pc game port?

Posted on 2019-04-08, 18:26

by rasz_pl

in Milliways

sure, you have 4 pins to send data into the computer, but no way of synchronizing transfers

Re: Socket 7 board issue

Posted on 2019-04-05, 23:44

by rasz_pl

in Marvin \ General Old Hardware

not the end of the world, you can dig that pin out with a dremel https://imgur.com/gallery/Amt1b or laser https://ca.rstenpresser.de/blag/tag/quadcopter/

Re: Socket 7 board issue

Posted on 2019-04-05, 03:22

by rasz_pl

in Marvin \ General Old Hardware

Seen few computers with one metal post too many 😉, might also be a good old "never happened to me ergo doesnt exist" ESD damage. Take everything out and try again on cardboard box.

Re: Has anyone replaced the 72pin SIMM socket ?

Posted on 2019-04-04, 19:08

by rasz_pl

in Marvin \ General Old Hardware

I use different method. Pre warm whole board to ~100C, flip it over sockets down, heat all the pins evenly until solder starts to melt, slot should fall off on its own (might need a sharp smack on the desk). Another option is Solder Pot/Bath.

Re: Has anyone replaced the 72pin SIMM socket ?

Posted on 2019-04-02, 20:06

by rasz_pl

in Marvin \ General Old Hardware

preheater + hotair but you can try replacing individual pins, doable with just soldering iron

Re: Best "modern" GFX card and driver for K6 system

Posted on 2019-04-01, 12:33

by rasz_pl

in Marvin \ Video

To be fair as far as retro experiences go you succeeded reliving most of socket 7 owners struggle from 1998-2000. SS7 wasnt exactly a premium platform, nobody was consciously choosing K6 over Intel on merit. Broken AGP support, calling something 'stable' when it merely didnt crash a lot , juggling …

Re: 486 Motherboard missing BIOS chip, what to do?

Posted on 2019-03-31, 17:01

by rasz_pl

in Marvin \ General Old Hardware

wrong link? https://www.ebay.com/itm/VL-1-486SV2G-motherboard-Socket-3-7-ISA-Extended-2-PCI-4-Memory-slots-/303072239560?nordt=true&rt=nc&orig_cvip=true "Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended . …

Re: Old Intel CPUs prices

Posted on 2019-03-30, 08:45

by rasz_pl

in Milliways

People buying $200 4790K already have premium Z motherboard and 16-32GB of hiend DDR3 ram, upgrading to Ryzen makes no financial sense to them.

Re: NCR System 3450: The Dual 486 110 Pound Monster.

Posted on 2019-03-30, 08:40

by rasz_pl

in Marvin \ General Old Hardware

This is pre APIC (1992 82489DX) so needs very custom OS support to work. It probably wont even run non vendor specific NT install.

Re: A List of DOS Games with 16-Bit Sound

Posted on 2019-03-29, 14:34

by rasz_pl

in Marvin \ Sound

of yours is out. The CT2940s have extremely high SNR and no cracks or pops, so that point is also out. cracks/pops are due to firmware bug (Single-Cycle DMA, afair interrupt is send one sample too late). As for the 44KHz playback having distortion in it, I don't know. me neither, apparently neither …

Re: A List of DOS Games with 16-Bit Sound

Posted on 2019-03-29, 13:57

by rasz_pl

in Marvin \ Sound

Lets not forget what a garbage fire Creative was in mid nineties. They started by releasing broken 16 bit product, and pretty much never fixed it. Already mentioned SB16 bugs might be why developers avoided 16 bit to cut down on support costs. I posted this already: "InfoWorld Jan 1993 has 16ASP …

Re: Dead Forex 386 motherboard :-(. Any solution?

Posted on 2019-03-27, 13:46

by rasz_pl

in Marvin \ General Old Hardware

I have a faint recollection of hearing screeching from pcspeaker when the bus (~14mhz) clock was missing.

Re: Cute games for DOS

Posted on 2019-03-27, 13:32

by rasz_pl

in Marvin \ Software

Cute? is your gf 12? gamer girls I knew back in the day played worms, civilization, colonization, fallout, pretty much all rpg and adventure games

Re: Weird Cache Socket placement..

Posted on 2019-03-27, 13:19

by rasz_pl

in Marvin \ General Old Hardware

Nvm1 wrote: Is it possible to check this with my multimeter on certain legs of the socket? yes, power and ground are easy to find (opposite corners)

Re: Old Intel CPUs prices

Posted on 2019-03-26, 14:35

by rasz_pl

in Milliways

Its simple, Intel has been sitting on its ass for almost 10 years due to no competition from pathetic AMD offerings (Bulldozer etc). 8 year old i5 2500 3.3-3.7 GHz 4 core CPU works just as well as brand new ~$100 G4560 https://www.youtube.com/watch?v=9XMDB9gO-iU, or heavily OC i5 2500K dukes it out …

Re: A brief comparison of 386 FPUs

Posted on 2019-03-25, 08:37

by rasz_pl

in Marvin \ General Old Hardware

I have run a few more tests. I tried using AutoCAD R12 to render a sample 3D drawing, e.g. nozzle3d.dwg. Unfortunately, both the i387DX amd Cyrix FasMath (black-top) complete this task in 33 seconds, +- half a second. Nozzle3D was one of the samples that took longer to render. ..AutoCAD, I have it …