Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-12-26, 13:59

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

I have started designing a sort of companion card that will help fill in the gap for some things not included with the PicoGus, like the ability to mix multiple internal inputs like CD-Rom and a wavetable header for those who built PicoGus v1.2. It also will include a few other features that will be …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-12-09, 14:15

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

PicoGUS Firmware v2.2.0 is released: https://github.com/polpo/picogus/releases/tag/v2.2.0 New features/changes NE2000 emulation/WiFi Please note that this mode is not supported on PicoGUS 2.0! It needs a v1.1, v1.2, or Femto version of the PicoGUS that takes a Raspberry Pi Pico and requires a Pico …

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Re: MT32 Display Mod / sed1200emu

Posted on 2024-12-05, 20:21

by

by Delphius

in MT-32 General

in MT-32 General

I have finished putting together a repo with some minimal documentation and decided to make it public. Anyone who is interested can find the project here. https://github.com/skadarnold/sed1200emu This latest revision cleans up a few things with a few additions like serial UART for debugging, better …

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Re: MT32 Display Mod / sed1200emu

Posted on 2024-11-03, 20:21

by

by Delphius

in MT-32 General

in MT-32 General

I am not sure if anyone is following along with this, but I am happy to report that I was successful in getting this project working! I spent some time updating the PCB and cleaning up the symbols and footprints that were converted over from the original schematics. There were a few issues with the …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-09-28, 14:08

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

dreamblaster wrote on 2024-09-28, 12:35: I made special edition of S2 to "feed the Polpo" : Filename s2red_feedthepolpo.jpg File size 52.73 KiB Views 1379 views File license Fair use/fair dealing exception Awesome! Looks good!

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-09-19, 13:11

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

When the PicoGUS 2.0 powers on or is reset, the LED sequence should go On -> Off -> On, and then once the card receives valid commands from the bus the LED will toggle on/off. Is the LED on or off when the card is unresponsive? Also: does this only happen on GUS firmware? If the card gets "stuck" …

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Re: Replacing CCFL backlight in laptop displays??

Posted on 2024-09-19, 13:08

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I made a topic here: https://www.vogons.org/viewtopic.php?p=1292898#p1292898 I cant get my brightnes fn key to work. It does nothing. Fn + F9 brightness down Fn + F10 brightnes up That does nothing at all. A few other fn combo work. Its a laptop i bought for 30$ recently. Its a Compaq Aramada E500 …

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Re: MT32 Display Mod / sed1200emu

Posted on 2024-09-12, 16:20

by

by Delphius

in MT-32 General

in MT-32 General

So I have done a little more research on this and found that it would be more appropriate to use a 16pf crystal instead of a 22pf like the one I am using. I will switch the crystal out and see if that gets me a proper clock. Otherwise it also seems that the ATMEGA8L-8AU is also the correct choice of …

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Re: MT32 Display Mod / sed1200emu

Posted on 2024-09-10, 18:28

by

by Delphius

in MT-32 General

in MT-32 General

I would like to dig this project back up and hopefully get a little help with it. Overall some of these things are very new to me, but it would be nice finishing this as an option for a display replacement or upgrade for the MT32. I have not heard back from the original developer for help or …

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Re: Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-10, 01:51

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Being fried and internally shorted is not the only reason for SRAM chip to get hot. 3.3V might be missing/broken making it power itself from data lines and latch up, or power something else thru SRAM data lines. This is interesting because the ISA / PCI diag card was indicating that 3.3v was …

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Re: Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-08, 16:19

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As was probably assumed, pulling the bank 1 chip made no difference with POST. What was interesting is there were a few bare spots on the traces. Not sure if that happened from the applied heat while removing or if it was possible there had been some work on this board previously. I did a little …

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Re: Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-08, 13:35

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok awesome thanks for the all the clarification on this. I removed the hot chip without any issues, but still no post codes so far. However it was on bank 0 with bank 1 still on the board, not sure if this would cause problems. I am going to search around for a minute to see if anything else is …

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Re: Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-08, 13:00

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On second thought, isnt there L1 cache that lives on the MB and L2 cache that lives on the CPU with Pentium systems?

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Re: Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-08, 12:45

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On Pentium boards cache chips live on CPU bus, bad chip can prevent CPU from operating Ahh of course. The datasheet for this chip states that it is a CMOS SRAM so maybe it is literally related to CMOS? I guess the reason why I ask is I am curious if there is any chance the MB will run with it …

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Freetech P5F76 Socket 7 MB - Repair Diagnoses

Posted on 2024-09-08, 03:05

by

by Delphius

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello! I purchased this board on ebay a while back and it ended up having some issues getting it to work. I decided to give it another go today and try to at least fix the more obvious problems with it, mainly being a group of bent and one broken pin on the PCI chipset. After getting everything …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-09-01, 13:59

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

This time I even went as far as to pull my Orpheus out even though it's game port was disabled via jumper. It is worth pointing out that no revision of any Orpheus card that was ever sold has a jumper to disable the game port. Control of all devices and their resources must be done through one of …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-08-31, 15:39

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

^^handy list. It's also been discussed that expanded support is planned for the future. Not PicoGUS related, but Bret Johnson's old USB utilities are another way t0 use USB gamepads in DOS. They seem to work quite well, provided your system has a certain type of USB host controller (details in the …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-08-31, 15:28

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

As you can clearly read on source code, supported gamepad devices are: Usb HID: ( (vid == 0x054c && (pid == 0x09cc || pid == 0x05c4)) // Sony DualShock4 (vid == 0x0f0d && pid == 0x005e) // Hori FC4 (vid == 0x0f0d && pid == 0x00ee) // Hori PS4 Mini (PS4-099U) (vid == 0x1f4f && pid == 0x1002) // ASW …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-08-29, 03:20

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

I did some testing again with the joystick / gamepad and so far having no luck. This time I even went as far as to pull my Orpheus out even though it's game port was disabled via jumper. No other game ports should be enabled besides the PicoGUS. I have tried an x-input converted SNES controller, a …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-08-29, 02:42

by

by Delphius

in Marvin \ Sound

in Marvin \ Sound

I briefly tested the USB function of a v1.2 card. Joystick : No result yet. Gamepads are getting power, but I haven't figured out the right config to get any input to DOS software, yet. Or the pads I tried may not be compatible. It may be a good topic for somebody to cover with a Youtube video. …

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