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Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-04-22, 13:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Freddy, I'm looking at getting a PicoMem for my Amstrad PC1640. I'm having a nightmare getting XT-IDE to work on it. Have the issues with sometimes not working on the Amstrad been ironed out recently? If it's stable now I'll go and buy one of your boards. Lovely work by the way! Hi, There are …

Re: Mod Master XT 1.0 Released : Play .MOD, .XM and .VGM on a 8088 4MHz

Posted on 2025-04-16, 20:32

in Marvin \ Sound

in Marvin \ Sound

dr.zeissler wrote on 2025-04-15, 11:29: https://youtu.be/Tk8lmaQGYzY?si=654xRc9vWYYjmCUx&t=1318 Thx for the "/h" flag so I can make use of this fantastic music player on my EuroPC in Hercules mode. I did it to use it on my PC200 with its MCA screen 😀

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-04-13, 19:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Since the mouse I'm using is a USB mouse which supports passive USB->PS/2 adapters, I thought I would be tricky again and just adapt it back to USB with a passive adapter. This works with just the mouse - but not when the KVM is involved. So I think the KVM is doing more than just passing through …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-04-13, 19:41

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I have lot of work in progress: - Started to code Sound blaster with emulated DMA, to be able to test hardware DMA after. - I need to find why it crash with PS/2 - All the work on the PicoMEM 1.5, then think again about the PicoMEM Future. (PicoMEM 2.O) Not simple, take lot of time 😀

Re: USB ISA cards?

Posted on 2025-04-02, 16:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

luRaichu wrote on 2025-03-31, 17:16: I tested the Chinese CH375 card on my AM386DX-40 system using MS-DOS 6.22 and FreddyV's 286 driver. Seems to work fine at the slowest speed, 0. What's the full range for the speed parameter? Hi, Speed parameter is not used 😀

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-03-15, 14:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

joebelter@hotmail.co wrote on 2025-03-15, 00:49: Freddy, any hopes in the future that the PicoMEM will work with higher spec boards such as 386/33? The bus speed is still 8mhz, right? Thanks! Hi, it does not depend on the isa clock. it was even tested on P2 or K6

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-03-11, 20:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I published the latest #PicoMEM firmware. This one is a huge step for the board as it can now use USB Drive, plus MicroSD as a "Network" like drive. Then, it has Full access to the disks in FAT32/ExtFS from DOS. USB Disk can be removed at any time, to copy files to the PC from a modern PC. No …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-03-11, 19:58

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Only a modified firmware is needed. The public firmware source already support the Picoroni pico plus 2, I just did not published a compiled versioin. As it add only Zero wait state RAM and faster PSRAM, it is not really worth the cost difference (Pimoroni pico plus 2 is expensive) I did not …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-26, 22:03

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That's definitely an improvement worth waiting for. So the Pimoroni pico plus 2 could be soldered onto an existing PicoMEM board? It doesn't require a new board design? And is there already a firmware that offers this improved functionality when a pico 2 is installed on the board? Thanks. Hi, Only …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-26, 12:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the suggestion and encouragement! I know it's not the USB cable since the cable works with the other standalone Picos I have. It looks like I will have to de-solder the Pico W and replace it when I have ample time (and the proper tools). At least the PicoMEM works on the host computer. …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-26, 09:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This was done because we can't overclock the Pico1 more than 280MHz with ROM Active It is now possible on the Pico2 :) Speaking of the Pico 2, should I hold off on purchasing a (preassembled) PicoMEM, until a newer PicoMEM based on the Pico 2 becomes available? The system I'm upgrading has 256KB of …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-22, 11:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Will it be possible in the future to flash new firmware via PMINIT or some other utility? That would certainly come in handy if/when BOOTSEL stops working. Hi, No, to flash the ROM, the code need to be 100% in RAM, then, no more possible to execute disk code to read the data... PicoMEM emulate too …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-19, 13:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2025-02-19, 06:27: I was wondering about if the pi pico could interface with 386/486 cpu bus. Not isa (similar to vl bus) No, not really For what concerns 386/486, there are lot of period accurate solutions. (Use real RAM sim ? )

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-18, 15:23

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a question about the PicoMEM, which I couldn't find the answer to on GitHub or in this Vogons thread (maybe I missed it, sorry if I did): Which of the supported devices can the PicoMEM emulate at the same time? I'm asking this, because it only wires up a single IRQ, if I understand the …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-18, 15:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.vogons.org/viewtopic.php?p=1330717#p1330717 Think there is anyway to make this project work on 386 or 486 bus for more system ram or cache? little unsure how fast the picomem xfer rate is? is it on the order of these older cache busses? or is it too slow? Hi, Use PicoMEM to extend RAM …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-02-18, 15:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FreddyV, PicoMEM is awesome. I got mine through TexElec a few weeks ago. It works very well in my IBM PS/2 Model 30. I primarily use it for A:, B:, and C: drives. I've used it mixed with physical Floppy drives as well. A: physical, B: PicoMEM and A: PicoMEM, B: physical. Super happy with this. …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-01-14, 15:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Just saw that someone published the news on the latest Firmware. I also published a new PM2000 Driver. (Wifi network packet driver) It can now work for machines with a CPU > 80186 The problem was the "fix" I found here (Vogons) for 8bit card. This fix was working for 8086/8088, but not for …

Re: PicoMEM : Pi Pico on ISA, with full Memory and I/O bus access

Posted on 2025-01-14, 15:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am curious, there are some PCs, like Packard Bell 486s, that use varta batteries soldered to the board, and if the batteries are dead it will not let you boot from either a floppy or HDD until the battery is replaced. Assuming the board has a dead battery but is still functional enough to post to …

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

Posted on 2024-12-02, 14:35

in Marvin \ Sound

in Marvin \ Sound

Is there a way to have a USB mouse and MPU-401 mode with full intelligent mode at the same time? Hi, There is a list of games needing the Interrupt in the MPU4101 mode : https://github.com/bjt42/softmpu/wiki/Compatible-Intelligent-Mode-Games This can't be used with mouse, as the mouse also need the …

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

Posted on 2024-11-11, 09:57

in Marvin \ Sound

in Marvin \ Sound

Memory emulation limitations : Memory emulation with PSRAM is quite slow for the moment, but multiple mechanism like a 32bit cache will improve this. (And Maybe DMA) The emulated Memory does not support DMA, Add support for it may be done in one or two months (May/June 2024) Anyway: As the real …

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