Re: How to burn CD readable with old cd-rom drive?

Posted on 2024-02-08, 03:17

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Older drives are more sensitive to disc quality. This is also an issue with some 1990s game consoles. The Taiyo Yuden plant in Japan made high quality CDRs that are much more compatible with picky drives. For the last several years it was operating, Taiyo Yuden was owned by JVC and the packaging …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-06, 17:39

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mockingbird wrote on 2024-02-06, 04:09: maxtherabbit wrote on 2024-02-06, 02:53: It's a completely different thing. This board is solely for the lucky star ls486e boards with the DIP24 KBC Thanks. If you share the gerber, I think I can create a KiCad file out of it -- if you're interested. …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-06, 03:48

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Pico rp2040 has IO quick enough to replace whole KBC providing both native PS2 and USB keyboard/mouse, maybe even with transparent joypad mapping. One plus would be ability to change board compatibility (am I correct in assuming its about how spare IO are routed to things like Turbo/A20?) in …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-06, 02:53

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes but there is a problem. I still have the gerber files (and a few unassembled PCBs) but I lost the original design files in a hard drive crash. The PCBs and gerbers I have have a flaw - the pins on the ps/2 mini-DIN footprint are backwards because I foolishly trusted the pin numbering in kicad …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-05, 17:33

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes I even made a PCB for it That's awesome, have you posted it anywhere? I found your interposer files, I didn't see anything for this one. If you haven't, would you be willing to share it? Yes but there is a problem. I still have the gerber files (and a few unassembled PCBs) but I lost the …

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Re: What hasn’t been done?

Posted on 2024-02-04, 15:10

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

leileilol wrote on 2024-02-04, 03:51: NO AI SUCKS all my homies hate AI

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-03, 21:10

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've got a Lucky Star LS-486E rev F board, it has the same small DIP24 keyboard controller (vt82c41n) that maxtherabbit mentioned in the LuckyStar LS-486e Rev:D Hardware Upgrade Guide tucked between 2 ISA slots. I would love to have a proper PS/2 mouse port on this board. Has anyone successfully …

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Re: What type of SIMM modules for socket 3 mobo with PCI slots?

Posted on 2024-02-01, 21:31

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There are two revisions of the SiS 496/497 chipset, one that supports EDO and one that does not. Both of them will work fine with FPM and parity or non-parity memory. Unbuffered. Post a higher resolution photo of the northbridge markings if you want to know if EDO is an option.

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Re: Pentium Pro Socket 8 CPU Cooler

Posted on 2024-02-01, 01:00

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah the difficult part is finding a heatsink that fits the socket. The fan is trivial

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Re: 3.5 Floppy Drive Recommendation

Posted on 2024-01-31, 14:04

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Alps is a solid brand

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Re: Which graphics card for Pentium Pro build?

Posted on 2024-01-31, 14:03

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by maxtherabbit

in Marvin \ Video

in Marvin \ Video

iraito wrote on 2024-01-31, 08:51: A matrox g200, voodoo 2, rage 128. Why win 2000 though? Personally I think a Pentium pro is a good home for win95\98\me but win 2000 sounds too heavy to me for a Ppro. With enough RAM (256MB+) win2k runs silky smooth on a ppro233

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Re: 32-bit OS that will run best on 8MB 386sx-16

Posted on 2024-01-30, 01:54

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by maxtherabbit

in Marvin \ Software

in Marvin \ Software

I ended up going with windows 95. I like to think my system is about as optimized as a 386sx16 can be, with the exception that it is lacking GUI acceleration. Performance is... tolerable? It's slow but not horrific.

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Re: Expected network throughput on ISA network cards

Posted on 2024-01-29, 15:10

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

TwistedSoul21967 wrote on 2024-01-28, 17:48: However, going back to the unmanaged yielded the previous result of 3.9Mbps (490KB/s) which is very odd considering auto detect is off so it should still use 10/FD. Here's your problem. The unmanaged switch will link at 10/HD by default, and you are …

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Re: DX4-100 Overdrive & SRAM Cache

Posted on 2024-01-28, 02:07

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

greetings, i just replaced the intel dx2-66 with a dx4-100 overdrive (DX4ODP100) in my winpro 486e. now my board is reporting bad sram, cache disabled during post. it was working good prior to this. i even ran the cachechk utility when the dx2-66 was installed and everything was good. it works well …

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Re: Expected network throughput on ISA network cards

Posted on 2024-01-27, 23:39

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yep I've seen ~1000KB/s using mTCP's FTP server on ISA many times. Obviously your CPU and storage subsystem needs to be able to keep up.

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Re: Varta replacer

Posted on 2024-01-27, 02:32

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by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There are three main concerns when doing a mod like this that never really get covered on YouTube. 1) making sure the RTC keeps accurate time after leaving the system off a day or two - low standby voltage can save the NVRAM settings just fine and still not run the RTC properly 2) making sure the …

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Re: The Soundblaster DSP project

Posted on 2024-01-26, 14:47

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

rasz_pl wrote on 2024-01-25, 19:49: I always found Day of the Tentacle intro, the part where tentacle drinks sludge and grows arms, to be a click fest. Is that using single cycle DMA? yes

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Re: The Soundblaster DSP project

Posted on 2024-01-25, 13:26

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

reproducing the bug to be reliably heard is trivially easy when you're physically using the computer with speakers, it's getting it to come across in a capture that's challenging

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Re: The Soundblaster DSP project

Posted on 2024-01-25, 01:06

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is release of 'dsp_v413_maelgrum' version 5 Changes from classic V4.13: 1. Hanging note bug fixed 2. ADPCM decoding bug fixed 3. ALL interrupt handlers are fixed (PSW bug and R0 used before pushed to stack bugs) 4. Numerous small scale optimizations (LJMP to RET is changed to RET, e.t.c.) Must …

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Re: The Soundblaster DSP project

Posted on 2024-01-25, 01:05

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also missed the topic... And it is a really interesting one! That is wonderful to have a dump of all 4.xx firmware, to have an ASM commented source of v4.13 and jewel in the crown, to have the most annoying bugs corrected with optimizations in bonus, all of that in a very short period of time. …

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