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

Posted on 2024-04-18, 04:02

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by RayeR

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With my CT2950, I can hear a constant tone with noDMA test. Maybe ESS sound card differs in this aspect... How about your DMA and Tada test? - Does your ESS sound card play tone constantly during DMA test, or just about 1s? - Does it play Tada without issues for more than once? OK, later I may test …

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

Posted on 2024-04-17, 22:07

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by RayeR

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I captured the LDRQ# signal during SBDIAG sine/tada test on my P67 MB with ESS ISA sndcard. Under Doom it looks similar. During boot and when soundcard is not used it's still high... Btw in my case the sbdiag sine noDMA is silent, both on real ISA and with SBEMU, only DMA sine plays. How about you? …

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Re: List of Web Browsers For All Operating Systems

Posted on 2024-04-16, 00:49

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by RayeR

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Thanks. I just tried WebGL in 3D mapy.cz and it runs as slow as Supermium - no HW accel. I'll try to use it for some time and compare with Supermium...

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Re: List of Web Browsers For All Operating Systems

Posted on 2024-04-15, 01:05

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by RayeR

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I tried Thorium. but seems to not work (and intended to work) on WXP...

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

Posted on 2024-04-15, 00:49

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by RayeR

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What SBDIAG program you exactly mean? I found this one from Snarkbark project: https://github.com/schlae/snark-barker/tree/master/sbdiag It may help to diagnose me that random IRQ5 issues... >LSS10999 So you modified the SAPPHISA.EXE to not write 0 to port 21h? Is it really needed or better to avoid …

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

Posted on 2024-04-12, 22:06

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by RayeR

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instead of building LPC-ISA adapter, I tried to directly implement sound blaster compatible 'dsp' over lpc bus using verilog. Nice, but the description is a bit short. What kind of FPGA you used? Is it this dev board? https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&No=1046 I …

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Re: Converted registered SDRAM

Posted on 2024-04-12, 20:53

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll add some 0201 resistors on future order... 😀

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Re: Converted registered SDRAM

Posted on 2024-04-12, 04:11

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just adding some photos... Filename rsdram1.jpg File size 164.04 KiB Views 223 views Filename rsdram2.jpg File size 162.42 KiB Views 223 views Filename rsdram3.jpg File size 191.32 KiB Views 223 views

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

Posted on 2024-04-12, 01:10

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by RayeR

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Unfortunatelly I have my test setup disassembled and left at work, maybe during next week I could capture some scopes of working LDRQ. Or could Rasteri? I would expect some narrow low pulses ~1/10-1us with long period of 10-100ms during normal operation. In a test program it may be just a single low …

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Dell DH1485E-S1 1,5kW power supply from disk array pinout?

Posted on 2024-04-11, 20:02

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, please anyone would know the pinout of this Dell PSU class? I couldn't find it yet. It seems to be used in disk arrays like SC7020, SC5020, SCV3020... Here's a photo of the connector: https://i.ebayimg.com/images/g/4OgAAOSw4xVkJ5RD/s-l1600.jpg After connecting power cord a green LED light on and …

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

Posted on 2024-04-11, 03:09

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by RayeR

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Proper PCB design tools like Altium has all necessary functions to make good DDR3, etc. routing (impedance calculator for defined PCB stackup, diff pair routing, signal length matching...) it's not too rocket science, just need to follow some high-speed signal routing guidelines that are freely …

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

Posted on 2024-04-10, 22:07

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by RayeR

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They don't need to reverse anything there are floating a lot of leaked MB schematics, e.g. hundreds from Gigabyte 😀 Yes, you can try to ask them first but in case of this low price it makes sense to desolder the PCH rather paying them more, as a bonus you'll have spare parts for repair 😀

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

Posted on 2024-04-10, 20:40

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by RayeR

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Who is the MB manufacturer? If there's even DMA-less SuperIO chip I doubt that some chinese designers would generously route LDRQ from PCH to nowhere for you... Do you have any chance to meet someone working with X-ray machine? It could give a fast answer whats under the ball 😀

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Re: Converted registered SDRAM

Posted on 2024-04-10, 20:21

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That sounds right. Rotating both 0-ohm resistors seems to pick 3 different settings, I think for clock phase, one of which will give you the best timings. Clock signal comes in on one link, through a via, I think to a loop on an internal layer, through a via to the other side of the stick, through …

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

Posted on 2024-04-10, 02:55

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by RayeR

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I don't have much experiences with modding modern AMI BIOS. My Gigabyte use old-style Award BIOS so the key tool I use is CBROM to add/remove/extract various modules. There was also MODBIN tool for modding SETUP entries but it's too old for newer Award BIOSes. I remeber I also had some "hot" moments …

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Re: Converted registered SDRAM

Posted on 2024-04-09, 20:37

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes the solder blob can be easily sucked with a litz wire and I'll be back in original state within a minute when needed 😀 UPDATE: there are 2 "T" structures, each on one side. Both contains 0-ohm resistor...

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Re: Converted registered SDRAM

Posted on 2024-04-09, 15:42

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In my case it looked rather like a capacitor? not sure now, later I take some photo and measure what the component is...

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Re: Converted registered SDRAM

Posted on 2024-04-09, 15:01

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I currently don't have any server MB that use registered SDRAM so I don't care much but I agree that it would be cleaner to solder some 0402 or 0201 tiny resistor instead of solder blob, maybe later, I just marked a note on a module sticker... BTW there's also PLL circuit in this modules and I seen …

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Re: Converted registered SDRAM

Posted on 2024-04-09, 01:47

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by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for this thread! I just digged out 2 huge registered DIMM modules IBM MT18LSDT6472G-133B1 (looks similar to those on 1st post) that was lying there spare for years without usage. So I did a simple mod by adding a solder blob just on the SMD invertor chip between input pin (REGE) and neighbour …

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Re: DOS driver for RetroWave OPL3

Posted on 2024-04-07, 15:10

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by RayeR

in Marvin \ Sound

in Marvin \ Sound

Hi, I just tested USBDDOS(P) driver (the latest release Releases 4 1.0 bugfix2 from Github) on my Gigabyte P67 (it has all USB via onboard intel EHCI) and it just hang the system, write no line of message. Only if I call it with /? it prints help info but even if I use some non-existing parameter …

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