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Re: 486 build advice - parts list ?

Posted on 2018-08-29, 10:44

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There were no 30 pin EDO modules and 72 pin ones would not work. You can install either 4 or 8 modules, there are two memory banks there. The tseng is the fastest card and the realtek the slowest by far. The tseng is really the only good card there. About the cpu the dx2-66 is faster than the dx2- …

Re: 486 cache sram question

Posted on 2018-08-29, 02:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I see, thanx for the explanation so it might be worth to swap my current tag ram of 20ns with the 15ns one that I have. Looks like the chips I ordered will simply go with my collection for now

Re: 486 cache sram question

Posted on 2018-08-29, 02:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

haha yeah, they will come in handy anyway

486 cache sram question

Posted on 2018-08-29, 02:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have finished building and clocking my 486 isa ch-486 chicony system, current running a 586 amd at 160mhz 40fsb. It has 256 sram cache 20ns Toshiba tc55328p-20 x 8 chips and tag ram 256kb at38h256-20 So in the spur of the moment I bought 10 x w24257ak-10 chips to replace my cache (2 spare just …

Re: 486 build advice ?

Posted on 2018-08-28, 13:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

win 3.11 was only dual boot, boot to dos then manually launch win, unless you set it up in autoexec.bat to do auto If you use a large cf card you will have to partition and format it to a smaller size. Fat is 2gb max and so is dos 6.22, dos 7 will read a 4gb partition. It also depends on your bios/ …

Re: 486 build advice ?

Posted on 2018-08-28, 08:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

not sure what you are aiming for, but I just finished a build using a isa only 486 5v board which was 486dx50 stock and currently running a 586 133 3v clocked to 160mhz through a voltage converter. I am not sure but if you add more cache I think you may need to increase the cache tag ram chip to …

Re: Help identify this 486 opti motherboard

Posted on 2018-08-26, 08:28

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice work. Interesting to see so many through hole resistors and caps on this board. I'm working on a 386 board now that has mostly SMD in those places. Nice work. Interesting to see so many through hole resistors and caps on this board. I'm working on a 386 board now that has mostly SMD in those …

Re: Duke Nukem 3D over floppies

Posted on 2018-08-25, 10:41

in Marvin \ Software

in Marvin \ Software

i was stuck in the same situation, wasted so much time with discs and errors. I got a ide - > cf card reader for under $10 1gb cf card and formatted with fdisk to 504mb and fat. Plug to pc with a cf - > usb converter copy files. Attach to your 486 hard disk controller card, configure in bios and …

Re: Prehistoric man / Prehisoric 2, for MSDOS.

Posted on 2018-08-25, 09:49

in DOS

in DOS

i see, I remember back in those days genesis emulator (mega drive) would run well on fast 486/ p60-75 but snes would be laggy like you described, I would say 99% chance it was emulated. I have and still am very big fan of both prehistoric games and researched all the platforms to try play all the …

Re: Prehistoric man / Prehisoric 2, for MSDOS.

Posted on 2018-08-25, 01:15

in DOS

in DOS

most likely a dos snes emulator, prehistoric 2 only came in 1 version on pc then later the improved version came on consoles, if it showed the fps then more likely its a emulator the dos games usually didn't show fps

Re: Overdrive

Posted on 2018-08-24, 22:33

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I used a sewing needle on a over drive I rescued, spent 1 or 2 hrs and 1 pin broke off but luckily it was a outside pin which I soldered back and I rushed that one was definitely avoidable. that cpu was really bad tho alot of the pins were mashed down. if it was a socket 370 or 428 no chance

Re: Help identify this 486 opti motherboard

Posted on 2018-08-24, 15:37

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My 40mhz crystal came today so I decided to follow the advice I was given to do. everything in 1 shot. Removed the keyboard din from my famous broken biostar motherboard which gets mentioned in nearly all my posts. Removed the din on chicony board ready for to swap, cleaned the blue corrosion with …

Re: Turbochip amd 133mzh cpu fan upgrade

Posted on 2018-08-24, 15:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The 40mhz crystal came today and after doing some other maintenance (swapping keyboard din plug and cleaning corrosion) I installed it. System booted on first turn and seems stable running 160mhz! Ran some benchmarks and played duke nukem 3d for 5 mins,. nothing crashed so far. https://preview.ibb. …

Re: Overdrive

Posted on 2018-08-24, 06:27

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

on lowest resolution it will work but won't be smooth, I tried it on my 486dx50 with 8m ram and it would get lag spikes, 16m ram made a difference but 50mhz wasn't good enough. next I put in a overdrive dx4 100 but ran at 75mhz because I had a 50mhz crystal (split in half running at 25mhz) so 3 x …

Re: Help identify this 486 opti motherboard

Posted on 2018-08-23, 07:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

thanx guys 😀

Re: Help identify this 486 opti motherboard

Posted on 2018-08-23, 04:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ahh yes the keyboard din I have been putting this one off and off but yeah eventually will have to do it. as for the via blue corrosion you are right, I never noticed it, its funny how you actually notice these things better on pictures then real life, probaby because of slight zoom. Also good tip …

Re: Help identify this 486 opti motherboard

Posted on 2018-08-23, 03:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

thanx for that video some good information there! I will definitely do this mod when im done with all the overclocking and ready to close the case. This is what I have done as a temporary solution for now https://image.ibb.co/jurS2e/IMG_20180823_124150.jpg https://preview.ibb.co/gedUFz/IMG_20180823_ …

Re: Help identify this 486 opti motherboard

Posted on 2018-08-22, 12:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had a moment a few weeks ago when I desoldered all the barrel batteries from all my old motherboards and at exactly that time I was putting this board in then taking out again so as a temporary measure I removed the battery while it was out, soldered in 2 wires maybye about 5-6cm long soldered the …

Re: Help identify this 486 opti motherboard

Posted on 2018-08-22, 12:08

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

sorry for the late reply, didn't even realise there was a reply to this thread, had to turn on email notifications, they were off so a little bit has changed since my last post, now running a amd 5x86 133 chip in with a Kingston tc voltage regulator at 33 fsb with a 66mhz chip I got. I am waiting …

Re: What retro hardware you killed today or it the past :( RIP.

Posted on 2018-08-22, 11:41

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I killed my 486 motherboard MB-8433UUD-A not long ago trying to remove a soldered on rtc bios battery 🙁

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