Re: Interposer for mobile Pentium MMX Tillamook

Posted on 2023-02-01, 14:45

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just sent a batch of PCBs yesteray, manufacturing in progress. I hope there's no bugs. I checked pinout tables again. The 2$ special prize is valid only for the 1st uploaded PCB of the whole batch. I looked at JLC web today and the discount is still present there, I feared about end of january …

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Re: List of open-source PC hardware projects

Posted on 2023-01-25, 18:53

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just finished parity SIMM 72-pin design (just 2-layers to save money but pwr/gnd planes could be added in future if needed). I plan to send a batch of PCBs to JLC until end of this month to get advantage of 2$ discount for 4L 50x50mm for PentiumMMX mobile interposer.

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Re: List of open-source PC hardware projects

Posted on 2023-01-21, 02:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hm, "So how does it work? The SM2236 is actually a CompactFlash (CF) controller" So why to bother with soldering BGA flash chips when you can get a cheap CF-IDE adapter and put CF there...

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2023-01-04, 01:29

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I should enlarge them a bit over standard header footprint holes expecting bare pins... Well, PCB updated...

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2023-01-03, 22:16

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I made a small PCB for IOCS16# generator circuit intended to place on backside of IDE controller's header, so this is why routed on one layer to make bottom insulated from other pins on controller's backside. EDIT: oh I see I should add more holes for IDE header pins before 31, 32 to pass them …

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Re: List of open-source PC hardware projects

Posted on 2023-01-03, 02:47

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have seen some russian Voodoo "magic" where they e.g. added a HDMI output, I think it was still PCI but shouldn't be technically problem to add some PCI-E to PCI bridge... AFAIK there's no official website with some details and documentation but only some forum thread, maybe someone else knows …

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Re: Unknown old board with Motorola MC68EC060 CPU

Posted on 2022-12-26, 05:15

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Shaved like a teen p*y 😀 * tens of GALs * CPLDs with 32 - 128 Mcells * fast static SRAMs * tens of 16-bit buffers * unidentified ASICs - trashed...

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Re: Interposer for mobile Pentium MMX Tillamook

Posted on 2022-12-21, 12:05

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I was noticed that JLCPCB now do 6-layers board up to 5x5cm for fancy price of 2L boards. I'm thinking about adding 2 solid VCC and VCC2 planes into stackup for better power impedance. It will be optional, still possible to manufacture as 4L. Does anybody know how long the JLC promo will be offered? …

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Re: Windows XP how many people still use for it their MAIN OS?

Posted on 2022-12-19, 19:21

by

by RayeR

in Milliways

in Milliways

KernelEx can be configured as opt-in only for specific programs (this is the way I use it on Win98). Also you need some way how to get the mallware inside computer and execute it. If I don't count a stupidity where user download it and click itself it would need e.g. some buffer overflow exploit of …

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Re: Windows XP how many people still use for it their MAIN OS?

Posted on 2022-12-19, 15:27

by

by RayeR

in Milliways

in Milliways

Also most of modern viruses doesn't work on NT and 9x 😀 (if not intentionally targetted)

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Re: 386 KMC-A419-8 motherboard and ram

Posted on 2022-12-15, 10:05

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

BTW I did the socket mod on this MB as mine has soldered Am386DX and I wanted also use PGA CPUs like my Tx486DLC that is supported in BIOS. I use FLT# pin of onboard CPU to disable it via jumper so I can switch back. I also populated 256kB cache, I had to jumper it by trial-error to be recognized by …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-14, 16:36

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As expected, mSATA still doesn't work with this IDE controller, it must be some lower level electrical/timing incompatability. BTW I tried to install Win95 OSR2 on the SSD on this 386/486DLC board and it took cca 45min (from install files preloaded on SSD from DOS). Installed system boots within …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-14, 03:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As expected, mSATA still doesn't work with this IDE controller, it must be some lower level electrical/timing incompatability.

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-13, 21:39

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, something like this. There may be problem that some controllers may have IDE connector so close to ISA slot and then it depends if 1-40 pin order goes left-right or opposite that would determine PCB rotation. Always is possible to solder it on wires, it's just 8 incl. pwr. I didn't try mSATA …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-13, 15:39

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I succeed to make a simple IOCS16# decoder using 2 log. gates IOs 7432 and 7403 (simple grounding of IOCS16# is no go as only data register requires 16-bit access and other regs. needs 8-bit). Now the SSD is identified properly and works fine on that ancient 386 with XTIDE BIOS. I plan to make …

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Re: Windows XP how many people still use for it their MAIN OS?

Posted on 2022-12-12, 13:09

by

by RayeR

in Milliways

in Milliways

I'm testing the latest Mypal 68 and after I turned off the multiprocess I never seen the BSOD and it works quite well, I can reach all webs I need, no need to reboot to my w7 or linux just because of internet. I hope that Feodor manage to rebuild some newer versions in future. Btw with minor mod you …

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Re: List of open-source PC hardware projects

Posted on 2022-12-08, 16:31

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When I'm designing 36-bit parity FPM SIMM I run into trouble with parity DRAM chips. They are used e.g. 4M x 4bit but it is a special chip that has 4 CAS pins while common DRAM has only one. So I decided to rather use 4 single-bit chips e.g. 4M x 1b but there's another problem that all of them I …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-07, 22:33

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, that was my 1st idea to just ground it but I don't know how it's wired on the controller, if it's not going directly to AT bus, then it would be bad idea to destroy all other 8-bit transfers... When I arrive at home I'll check the circuits how it's wired. UPDATE: Well, both Transcend PATA SSD …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-07, 22:11

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

/IOCS16 indicates to the host system that the 16-bit data port has been addressed and that the device is prepared to send or receive a 16-bit data word. Upgrading and Repairing PCs, 21st Edition "Pin 32 was defined as -IOCS16 in ATA-2 but is no longer used ." your sata-pata converter is not …

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Re: SATA HARD Disk in 286/386 Mobo: Is it possible?

Posted on 2022-12-07, 04:18

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, look at buffer data again, I oversight it. I display the data buffer as array of 16bit words so it's OK to be flipped due to little endian. BUT all the MSBs are zero! E.g. the last bytes of MBR should be 55, AAh or as a word AA55 but there's only 0055 in the buffer. This is the problem. Now I …

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