Re: dos 7.10 on an xt?
Posted on 2020-03-17, 20:59
Yeah, 7.x needs 386 or higher to function.
Re: Help with fixing Creative TNT2 Ultra
Posted on 2020-03-17, 12:24
Short out those inductors and you get a sharper image (and remove the little capacitors sitting between video signal and ground).
Re: PCie-to PCI, PCI to ISA, # of slots multipliers - bridges, risers, backplanes, research, especially for DOS, WIP.
Posted on 2020-03-17, 12:04
Lack of LDRQ means that DMA controller should be finally deleted from the chipset, which means it should be possible to create your own over PCI or PCI-E and no longer need LPC for anything except for SERIRQ signal. FPGA will be necessary though, CPLD will be too small for such a stunt. PCI-E puts …
Re: PCie-to PCI, PCI to ISA, # of slots multipliers - bridges, risers, backplanes, research, especially for DOS, WIP.
Posted on 2020-03-16, 21:24
LPC bus has everything necessary, what does matter is IO ports configuration and a custom utility will be needed for that. DMAs aren't used by anything on the board though IRQ assignments may be on the arbitrary side by the BIOS but that can still be fixed by reprogramming the chipset. EDIT: …
Re: MS-98L9 V2.0 , a new 1151MB with an ISA slot
Posted on 2020-03-16, 19:55
Turns out this board has LPC to ISA bridge, same chip as one on my C2D board so it will be able to support at least some ISA sound cards ~ Southbirdge chip has no LDRQ signal on the LPC bus, so DMA is not possible even though the bridge chip can support DMA... bummer.
Re: PCie-to PCI, PCI to ISA, # of slots multipliers - bridges, risers, backplanes, research, especially for DOS, WIP.
Posted on 2020-03-16, 19:54
Ok, nice, same bridge as my C2D board. This is exciting as the bridge definitely supports ISA DMA, as long as LDRQ is connected ~ My pockets are empty though, but if I am gonna upgrade, that's a board I would want to get 🤣.
Re: PCie-to PCI, PCI to ISA, # of slots multipliers - bridges, risers, backplanes, research, especially for DOS, WIP.
Posted on 2020-03-16, 15:52
A thread was made of this board earlier today. I do wonder what bridge chip it uses, so it could be determined if there's ISA DMA or not.
Re: MS-98L9 V2.0 , a new 1151MB with an ISA slot
Posted on 2020-03-16, 09:08
A friend showed it a moment ago and I tried to find more info but I was unable to. There's no good photos around so I could see what the ISA bridge chip is. There's a good chance it lacks working DMA and IRQs which makes the slot useless... but I am certainly excited to some level.
Re: Successfully modding a 486 motherboard to use 3.3V CPUs
Posted on 2020-03-15, 12:08
I would try watching the voltage drop on a datalogging multimeter while heavily loading the CPU. The other thing comes to my mind is checking all you filter caps, especially if they all are old tantalums. Maybe try to search for unpopulated caps near the regulator and the CPU socket Vcore pins. I …
Re: Successfully modding a 486 motherboard to use 3.3V CPUs
Posted on 2020-03-14, 21:11
I have added 3.3V support on all the mobos I have which are supposed to have support but regulator isn't present. I have one board which is not stable with 3.3V, I will have to try to see if boosting voltage makes it stable.
Re: Fujitsu ICL Indiana
Posted on 2020-03-14, 16:34
I have one also, but insides have changed over the years. http://www.tmeeco.eu/ABOUT/ServFrnt.jpg http://www.tmeeco.eu/ABOUT/ServBack.jpg http://www.tmeeco.eu/ABOUT/SideShot2.jpg (not the original board or hardware) Originally it had 32MB RAM, Pentium 166 (without MMX), Mach64CT with 1MB RAM, Labway …
Re: Universal PnP Sound Card Enabler for DOS v0.65b (UNISOUND)
Posted on 2020-03-14, 12:33
This looks like a pretty interesting tool, I will try it at some point ~
Re: Yamaha YMF7x4 Guide
Posted on 2020-03-12, 13:52
When your hardware has PCI slots it will be powerful enough for SoftMPU to be usable. But on hardware level, there is no intelligent mode support on most hardware out there.
Re: Yamaha YMF7x4 Guide
Posted on 2020-03-12, 06:58
Only UART mode, pretty much nothing outside few dedicated MPU401 interfaces support intelligent mode.
Re: How to stupidly fry your almost irreplaceable AWE64
Posted on 2020-03-10, 05:04
That sounds like the PnP EEPROM got corrupt, which is something that is known to happen to the AWE32 and AWE64 cards.
Re: Shelf life of SIMMConn
Posted on 2020-03-08, 09:54
I'm pretty sure they are rather called PLAs in their datasheets, as that is the umbrella term for all these. But true, it's easy to mix up. For example in a datasheet I had lying around : The PALCE16V8 is an advanced PAL device built with low-power, high-speed, electrically-erasable CMOS technology …
Re: Shelf life of SIMMConn
Posted on 2020-03-08, 09:15
I keep mixing up PALs and GALs, but and it doesn't help that there are devices that are reprogrammable and are still called PALs in their datasheet (and i think because GAL got trademarked by Lattice so others couldn't use that name).
Re: Shelf life of SIMMConn
Posted on 2020-03-07, 23:23
It depends on a particular part, many are reprogrammable. For longetivity you need to cherry pick a device with highest rated retention time. I don't know any to suggest since I never looked into it in any detail.
Re: Shelf life of SIMMConn
Posted on 2020-03-07, 23:14
The PAL chips have limited data retention time, on the worse side only a decade is specified as maximum. This is a general problem with charge capture based memory cells, all the NOR and NAND flash chips, CPLDs, EPROMs and EEPROMs are affected too and will eventually "expire". A reflash will fix …
Re: Acculogic RAMpAT! - Anybody with a working card here?
Posted on 2020-03-07, 23:08
Yeah, battery is most probably right there and I would start grinding it open at that end, it shouldn't take a lot of effort to get access to the battery terminals. You will probably need to grind enough to identify the postive or negative terminal to be sure things are correct since reverse …
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