Re: Where to upload old software extracted off old floppies?

Posted on 2024-03-27, 00:22

by

by dekkit

in Marvin \ Software

in Marvin \ Software

Along these lines, what programs are recommended for making the disk images? I used specific hardware PCB 'greezeweazle' PCB (v4.1) which has a bunch of scripts and front end to extract .img files using flux transitions (it avoids the PC floppy controller and connects via USB( Then 7zip to poke …

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Re: Where to upload old software extracted off old floppies?

Posted on 2024-03-26, 13:23

by

by dekkit

in Marvin \ Software

in Marvin \ Software

Ta, will get to work. Its interesting going back seeing all this stuff and using dosbox to quickly see what's on them. We take so much for granted now days.

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Where to upload old software extracted off old floppies?

Posted on 2024-03-26, 04:19

by

by dekkit

in Marvin \ Software

in Marvin \ Software

HI all, I've found a few boxes of old IBM PC 5.25inch and 3.5inch disks with a lot of software that may or may not be worth extracting and uploading somewhere (i.e. typing tutors, graphic viewers, early word processors etc) Usually this sort of thing comes in handy once in a while when you're …

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Re: Help with obscure Toshiba docking station

Posted on 2024-01-06, 01:37

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I know the last post was made a year ago but any chance someone could make a simple pcb to access the gameport on a satellite pro 4300 (for reference the port replicator for this one is PA2731UE), the connector is very different from the portege 610t one. I have 2 working units, i could send pics …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-08-05, 08:42

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also mounted this project in a cheap diy project box (excuse the hot glue), namely so its easier use wirhout need to grab extra cables (but also so I dont scavange the pico for other projects !) Filename 20230805_172638.jpg File size 1.29 MiB Views 779 views 😀

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-30, 10:09

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Was reading thru that link, swapping pins isn't such a big deal (ive used a bunch of DuPont cables when I redid it to make it easier to debug anyway). Like the idea of someone making a cheap breakout pcb too (with all the headers and sockets etc that a pico can clip into) was thinking of doing …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-30, 08:01

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

SOLVED Just found the batch of Bi-Directional Logic Level Converters i ordered a while ago for this.... undid my non-working version with pull ups and replaced it with the schematic for the ps2x2pico and ... ...SUCCESS!!!! Notable differences: - the mini 486 is now receiving commands / button …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-30, 03:41

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok getting some weird behaviour on p4 but I've been able to rule out a few issues worth noting. Thankfully I built two of these converters! Issues - adapter A (with pull-ups) was not working on the p4. In the process of tweaking / modifying it for our experiments...something has broken along the way …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-29, 16:31

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm just getting "ps2pico-1.1.1 DEBUG=true".... no IRQ at all :( its getting late, i'll retest and setup the pentium 4 tomorrow at some point now that i've got the debug hardware setup - just to rule out if I've messed up my wiring with the various updates and pulling cables out. On my win10 box - I …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-29, 15:43

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Arduino Nano - Serial Monitor - Sketch (serial_monitor.ino) - it should work for any micro that compiles under the arduino IDE. serial_monitor.zip If anyone else wants to play along at home, or just needs a simple arduino to perform as a cheap RX serial monitor, i've attached the code i've modified …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-29, 15:31

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ok got my arduino monitor code sorted after messing around with some googled code, hopefully this looks better. I'm not seeing any irq info in the latest debug version (can you check to make sure it isn't the same as the last) - otherwise its not even registering. 00:53:54.447 -> HID device …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-29, 08:54

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Excuse the format, i'm still messing with an arduino sketch to get it reading the RX pin properly. 18:52:07.013 -> p 18:52:07.013 -> s 18:52:07.013 -> 2 18:52:07.013 -> p 18:52:07.013 -> i 18:52:07.013 -> c 18:52:07.013 -> o 18:52:07.013 -> - 18:52:07.013 -> 1 18:52:07.013 -> . 18:52:07.013 -> 1 18: …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-29, 05:59

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok soldered in some pins to nano and pico so I can wire it up and then will run thru some tests this weekend. Test setup: - pico version with the pull ups (to rule out voltage pull up issues) + firmware linked above. - arduino nano with RX (nano) wired to TX (pico GPIO pin 1) and ground ls shared - …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-25, 10:48

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok, give me a few days to solder some header pins onto a spare nano and I'll take some measurements to help get to the bottom of this. Does it do any handshakes with the pc on boot? Are there any timing settings I can play with to help dial it in?

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-24, 11:59

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ok no dice with this 486, same issues as before (keyboard not detected errors on boot). I just tried using version 1.0. This was on the PCB i had the pull ups on. What is the difference with the XT variant? should I be using that one instead (i believe its electrically / signal compatible yeah?) …

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Re: Using a USB keyboard with a PS/2 or AT port

Posted on 2023-07-22, 16:55

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh cool...will give it a try and report back. (Just need to find where I put the pcb for this project!).

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2023-06-27, 12:50

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting - Im surprised the bios structure would be that different given the hardware revisions weren't huge leaps from what I recall (and given the ic pin outs are similar) - I could be horribly wrong on this tho. While the tool maybe limited, if someone is brave enough to map out some more of …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2023-05-19, 11:34

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nah for this don't waste your time with phash to be honest. There isn't a guarrentee that it will backup the whole chip and there is always a risk you could mess up the bios by inadvertently writing to it (unless its a one time write like mine is). Using an external eprom reader means you can …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2023-05-17, 11:41

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by dekkit

in Marvin \ Video

in Marvin \ Video

Have that same model, which was very handy when trying to diagnose and solve a weird video card that had a non-standard refresh rate issue (was able to scale it pretty well) What's also great with these, is you can still buy new replacement parts for it direct from the oem ( in my case, I was able …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2023-05-17, 11:28

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

i may be wrong but you might be able to substitute a 27SF equivalent eeprom for that chip and be able to erase/program it. should be a 27sf010 https://www.futurlec.com/Memory/SST27SF010.shtml I did this in my ECU programing days to replace a 27c512 Thats excellent and thanks for sharing what to …

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