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

Posted on 2023-04-02, 11:58

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by rasteri

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https://github.com/lss4/lpcexp Compiling it in 32-bit requires DOS4G(W) or DOS32A to run, though it works with JEMM386 loaded (in DOS32A's case, using the version from FreeDOS), without page fault. It's also possible to compile it in 16-bit, just that I have to write my own _outpd and _inpd …

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

Posted on 2023-04-02, 11:15

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by rasteri

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Can you be more specific about your super long wires? I think I would need about 10cm to get from TPM to slot placed at bottom of case on the left side. I woldn't rather exceed 20cm or so. Maybe ground wires between signal wires would help to reduce crosstalk... I'm using a mixed bag of random …

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

Posted on 2023-03-31, 19:10

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by rasteri

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The biggest problem being that the Super I/O chips by certain manufacturers(especially the ones made by ITE Inc), don't have their datasheets or pinouts online for some reason. So finding that pin could be difficult, not impossible, but certainly not easy. True. But the boardview and/or schematic …

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

Posted on 2023-03-31, 18:22

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by rasteri

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The boardview does not show the traces, so it could be not connected at all for all I know... If the net names between the pads are exactly the same then they're almost certainly connected. I still haven't got close enough but I can't see any trace from the Super I/O chip, so it might just not be …

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

Posted on 2023-03-31, 17:43

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by rasteri

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Is it possible to test the LDRQ with any software? According to the boardview my Asrock X99 Extreme4/3.1 has the LDRQ#0 connected to the X99 chipset PCH and also the Super I/O chip: NUVOTON NCT6791D But I'm not sure if there is a connection between them, obviously soldering a wire to the Super I/O …

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

Posted on 2023-03-30, 11:44

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by rasteri

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Some other decoders (KB, MC, RTC, IOH) have default values. It seems whatever values set on those 8 decoders (ADDR1-4, KB, MC, RTC, IOH) on the Fintek bridge do not really matter. Only the values set on the Intel LPC controller matter. Maybe the address decoders are just to lock it down to specific …

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

Posted on 2023-03-30, 10:05

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by rasteri

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Recently I've been experimenting with the F85226 bridge on my RUBY-9719VG2AR and I noticed something. It appears I don't really have to program the generic address decoders (ADDR1-ADDR4) on the Fintek bridge side. I tweaked the program and purposedly omitted the code for programming the address …

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

Posted on 2023-03-30, 09:37

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by rasteri

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Good work. what LDRQ did you steal? 0 or 1? BTW need a schematic? This web is quite rich of GB leaked docs :) Yeah I used LDRQ1, as it wasn't wired to anything except a pullup resistor, just like on your board. Multiple LDRQ devices shouldn't be wired to the same pin as they're usually driven push- …

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

Posted on 2023-03-29, 15:46

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by rasteri

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Managed to mod a Gigabyte GA-Z77-D3H, it works really well. LDRQ was pretty easy to recover, there was an unpopulated pullup resistor under the PCH heatsink. I just brought it out to a pin header.

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Re: My first real attampt to get XTIDE on a network card...struggling some

Posted on 2023-03-29, 11:25

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by rasteri

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As above, the rom file MUST be configured first. The documentation used to be pretty terrible for not making this immediately obvious. Not sure if that is still the case. Twice now I've forgotten that and spent an hour debugging a problem that didn't exist. I wish the default ROM just included a …

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

Posted on 2023-03-28, 22:19

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by rasteri

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I think there's no such rigid standard. There's only defined some minimal subset of LPC signals that needs to be present on TPM header but the rest is on manufacturer will. Also there are at leas 2 different header pitches. I luckily have a leaked schematics of my Gigabyte GA-P67-DS3-B3 mainboard …

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

Posted on 2023-03-28, 10:57

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by rasteri

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It's not clear to me, or I overlooked it, where Rasteri connect LDRQ# signal from to his adapter. All MBs that I met has not routed LDRQ# to TPM header So there is kind of a standard for TPM headers, I've seen the same pinout across several manufacturers. However, the catch is LDRQ is normally …

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

Posted on 2023-03-26, 18:50

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by rasteri

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By the way, it seems the executable I built with DJGPP (actually cross-compiled from Linux) doesn't run when JEMM386 is active. It outright pagefaults. Running in real mode (without JEMM386), however, works as intended and I'm able to actually take a look at the LPC controller registers, and make …

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

Posted on 2023-03-26, 09:48

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by rasteri

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Tiido wrote on 2023-03-25, 22:00: This is excellent ~ Thanks mate! Wouldn't have been possible without you 😀

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

Posted on 2023-03-24, 14:13

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by rasteri

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Perhaps a "partial emulation" solution could work here? Maybe crazii's SBEMU project could be extended to support Sound Blaster cards in "direct mode" (non-DMA mode, plugged into a dISAppointment adapter) as a physical target device, while emulating a Sound Blaster with DMA in software. So instead …

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

Posted on 2023-03-21, 20:13

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by rasteri

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I've started a github with hardware designs and source code. Needs a lot of work still but if anyone's determined enough that should be enough to build one. https://github.com/rasteri/dISAppointment The "Sapphisa" utility will also work on the RUBY-9719VG2AR, and allows you to specify custom ports. …

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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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