Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-21, 11:42

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by rasteri

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kaiser77_1982 wrote on 2023-03-21, 11:18: I prefer a PCIe-ISA, but this looks very well. Not possible I'm afraid 🙁 PCIe doesn't do DMA in the same way, so it wouldn't be DOS-compatible.

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-21, 11:08

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by rasteri

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EDIT: This is only about the chipset. Compatibility needs to be assessed at a per-board basis, as not all boards have a 20-pin TPM header and not all boards actually wire the LDRQ signals to the header. On some boards' manuals, the pins in question are marked as NC, though it could be a lie. Yeah …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-03-21, 00:20

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by rasteri

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kmeaw wrote on 2023-03-20, 23:49: I still have no idea why did it work with a PS/2-to-USB converter. Different devices have different logic thresholds I guess.

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-20, 13:40

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by rasteri

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Actually, it's possible to make it work outside DOS with the help of GRUB4DOS. The same should apply to your utility as well. Yep - I've used grub4dos to run ISA soundcards on my Ruby, everything up to XP works great. I couldn't get any versions of windows to work after that, but I didn't try very …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-03-20, 13:00

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by rasteri

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I have a DSO quad nano with two probes and a Cypress sigrok-compatible board with 16 unbuffered channels. Should I capture PS/2 clock and data lines? Yeah a sigrok capture would be perfect. If you could start the capture before you turn on the PC and capture the entire boot sequence that would be …

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-20, 09:55

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LSS10999 wrote on 2023-03-20, 04:44: Excellent work! Does this adapter work out-of-box, or that it needs some configuration similar to that of RUBY-9719VG2AR? Yeah it does. A while ago I rewrote Tiido's RubyISA utility in C - https://github.com/rasteri/RubyISA32 - and the init utility for …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-03-20, 09:48

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by rasteri

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kmeaw wrote on 2023-03-20, 02:07: What can I do to collect more debugging information? Do you have a scope or logic analyzer?

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-19, 17:03

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dontbugster wrote on 2023-03-19, 15:51: Wow sounds great! Do pentium 3 boards have it? I think you can use a PCI-ISA bridge with pentium 3 chipsets. Maybe I'll try that one day.

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-19, 17:03

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by rasteri

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I would like some chipset information on dma capabilities. Basically any chipset with a southbridge that has an LDRQ signal should work. Intel chipsets with an ICH or PCH (up to series 9) still have this signal. So that's anything up to potentially socket 2011 motherboards with 6th gen core CPUs. …

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-19, 15:51

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For full functionality, it needs a chipset with DMA support, right? Or that LPC-to-ISA bridge provides DMA even if the chipset doesn't? Yeah it'll need a chipset with DMA. I haven't really looked into exactly how "modern" you can get before the LDRQ signal starts disappearing from LPC - I'll check …

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dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-03-19, 14:49

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by rasteri

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Disappointed that your modern PC doesn't have ISA? Well - you've been lied to. Your motherboard does have an ISA bus, but it's locked away inside the chipset. And we can help it escape through the TPM connector. I've designed an adapter that uses the Fintek F85226 LPC-to-ISA bridge to allow you to …

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Re: USB to RS232 converter using CH375B USB host module?

Posted on 2023-03-16, 10:20

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by rasteri

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Probably, but you'd have to write drivers for it. Better off getting one of those CH375 ISA USB adapters - USB ISA cards?

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-03-14, 08:12

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by rasteri

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1. I still can't seem to get " MODE CON RATE=xx DELAY=xx " working - doesn't matter which values I use, there's no change. Hey I've tested this on Windows 98 DOS mode and Dos 6.22, it seems to be working for me. Maybe the exact timings aren't right but it's definitely having an effect. What exact …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-06, 12:40

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by rasteri

in Marvin \ Sound

in Marvin \ Sound

I've been trying to figure this out myself. Information is very scant and often conflicting. I remember using a 10th Gen core i5 laptop (Costco price mistake about 3 years ago), and it actually booted into legacy mode (DOS), but its VGA drivers were entirely absent, which made it useless for DOS, …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-05, 17:23

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by rasteri

in Marvin \ Sound

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I think about the fastest modern system we'll see able to run SBEMU natively is a 9th or 10th gen Core i9 system. Everything beyond that will sadly be impossible outside of an emulation / VM due to the terrible decision made by Intel and Microsoft to delete BIOS legacy code. Any idea what CPU/ …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-05, 15:19

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by rasteri

in Marvin \ Sound

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This is relevant to my interests. Now a competition to see who can run DOS Quake with audio on the fastest PC?

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-03-02, 16:24

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by rasteri

in Marvin \ System Specs

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I measured the current draw a while back, don't remember the exact numbers but it was in the ballpark of slightly under 1A. There might be an initial surge though, and of course whatever you plug into the various connectors (USB, SD) will draw power as well. So yeah, the boring answer is as always: …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-03-01, 18:16

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by rasteri

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1. I still can't seem to get " MODE CON RATE=xx DELAY=xx " working - doesn't matter which values I use, there's no change. I've included the HID log for the keyboard I'm using to test with, if that might have anything to do with the matter. It's a Logitech UltraX Premium. 2. Does HIDman support USB …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-02-21, 10:50

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by rasteri

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Tried attaching the mouse logitech b110s and the HIDman with the new build and it sadly stopped to responding after outputting: unsure way its random caps and not caps sometimes ;) hidman VO. 1 mAIN mENU 1. CONFIGURE GAME CONTROLLER MAPPINGS 2. 10G hid dATA esc TO EXIT MENU 10GGING hid dATA. pRESS …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-02-19, 23:53

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by rasteri

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OK Latest commit fixes the crash on my setup. Logging the HID data also shouldn't crash.

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