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

Posted on 2024-04-02, 13:28

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by rasteri

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I'm not sure if the Fintek bridge is automatically aware of which bus master it has been designated as, or something needs to be done to "tell" the bridge about it. I'm yet to find anything else related to this from the documentations... Hey interestingly, the AF variant of the fintek chip appears …

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

Posted on 2024-04-01, 18:05

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by rasteri

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Disabling the onboard audio allowed me to set IRQ7 for the sound card. However, it seems LDRQ1# I brought out is not working correctly, as DIAGNOSE currently gets stuck at DMA section, saying the DMA channels are not usable. IIRC there's a register to switch LDRQ1 between a GPIO pin and LDRQ. I'll …

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

Posted on 2024-03-29, 20:59

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Okay, I got it. So far I've two v0.3 builds and neither worked correctly. Hey I did find one potential source of problems in 0.3. In the old version, all resistor packs shared a common VCC or GND. Now some packs have different pins pulled to VCC/GND. I've attached schematics showing what I mean. …

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

Posted on 2024-03-25, 11:44

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rasteri wrote on 2024-03-25, 00:39: The original CH559 USB source code has these problems too. I wonder if anyone has written a better USB stack for WCH devices Hmm yeah even if I recompile the original CH559 SDK under Keil instead of SDCC we still have problems on some hubs. It fixes the …

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

Posted on 2024-03-25, 00:39

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by rasteri

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I had added limited support for hubs to my fork https://github.com/hkr/HIDman/tree/hubs2. It worked with my KVM but has compatibility issues with some hubs and fails when devices are disconnected. Maybe it helps anyway. The original CH559 USB source code has these problems too. I wonder if anyone …

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

Posted on 2024-03-24, 12:05

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by rasteri

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Looks like the include of ch559.h in util.c should be lower case. I thought all of those were fixed at some point, maybe it regressed. OK it's fixed now. I also finally merged the pull requests after a year... Also latest updates add keyboard LED support. Next will be hub support. I don't seem to …

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

Posted on 2024-03-23, 16:24

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Ah a D2D, so with tinyBIOS, you likely wont get any VGA support at all. You have to use one with Award for that. TinyBIOS throws everything over the serial port. Propreitary PCEngines firmware, so it likely wont work at all. Well I suppose I don't need VGA to test soundcards.... Seems like there's …

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

Posted on 2024-03-23, 16:20

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I made miniPCIe to PCIe x1 adapter for tinyLlama, not tested yet... Hm, miniPCI woul be a much more wires but less speed... coul be doable on a 4L PCB.. I actually finished the design of some miniPCI adapters (attached pic), I haven't actually ordered them though. I'm just using 2layers but keeping …

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

Posted on 2024-03-15, 20:01

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I have an alix 2d2 I keep meaning to test, unfortunately it's the one without a graphics card so I first have to build some miniPCI to PCI adapters (another stalled project...)

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Re: Tiny Vortex86-based DOS gaming PC - weeCee

Posted on 2024-03-10, 19:57

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by rasteri

in Marvin \ System Specs

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Hello, my name is ALEX and i am start to build vortex86 based gaming console. Based on Ebox thin client. CPU of my box is vortex86 MX@900mhz and 512 ram. (i586 compatible). I started this project a while ago and today i meet with this thread. In my plans create linux based machine with some gui …

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

Posted on 2024-02-25, 17:00

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by rasteri

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sofakng wrote on 2024-01-29, 14:42: Any plans to further update this project? Github shows no updates for 8 months 🙁 Yes I definitely will, I've been moving house but it's next on my list when I get my shop set up again.

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2024-01-10, 13:18

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by rasteri

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appiah4 wrote on 2024-01-10, 07:37: I'm also failing to see the exact point of a 640x480 rendering option.. There are already a lot of hires renderers for Doom out there. It means the wall/floor edges get less jagged. And there are lots of pointless video modes in fastdoom, that's kinda the point 😀 …

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

Posted on 2024-01-02, 11:37

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RayeR wrote on 2024-01-02, 04:45: My 1st test in PC was not successfull. I attached it to my Gigabyte GA-P67A-D3-B3 with LDRQ1# mod and put ES1869F in the ISA slot. You have another soundcard to try? Maybe sapphisa doesn't open up enough ports for the ES1869 or something

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

Posted on 2023-12-19, 13:47

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I think I might have caused damage on the Z97M board by actually connecting the LPCPD# wire without thinking this time. On newer versions of the LPC bridge LPCPD# is not needed anymore and is connected to +3.3V via a pull-up resistor on the PCB. The reason was that on some boards the LPCPD# pin …

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

Posted on 2023-12-13, 05:59

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by rasteri

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By the way... is the 0.3 board on GitHub usable? The changes I could notice are capacitor orientations and adjustments in resistors, which actually added a connection to pull MASTER# up so I don't have to manually solder a resistor like in previous board versions. (EDIT: The LED orientation marker …

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

Posted on 2023-12-04, 15:35

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LSS10999 wrote on 2023-12-02, 10:15: I guess the TPUs on that board are indeed in the way, and it has nothing to do with whether the adapter uses 2E or 4E for configuration... This is interesting though - if your board has a superIO or TPM device that uses 4E/4F, that *must* mean it's possible to …

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

Posted on 2023-11-26, 14:10

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Further inspecting the boardview I found that there are two other devices on the LPC bus (TPU, to be precise). I wonder if these TPUs are somehow conflicting with the LPC-ISA bridge's functionality... such as using the same 4E/4F register pair for configurations. On the other hand, assuming SuperIO …

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

Posted on 2023-11-22, 19:45

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Assuming this is a subtractive decoding thing, maybe rather than disable subtractive decode we can reconfigure the PCI bridge to not claim the relevant ranges, and by default it should fall back to LPC? I'm not finding anything about it in the docs however

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

Posted on 2023-11-17, 16:54

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I have a couple of older AMD motherboards I might test on - one based on a geode, the other I think socket AM3. Certainly the geode has an LPC header, I'll check the AM3 one too

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

Posted on 2023-11-15, 13:17

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by rasteri

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Probably has something to do with subtractive decoding. I did some search about it... looks like you need to set the bit 5 of the register 40h (as well as bit 7 of the register 4Bh) on device 14h, function 4 (PCI-PCI bridge). However, I don't know if this device (which would be 1022:790f) still …

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