Re: Matrox Millennium II 16MB - exists? If so, why?
Posted on Yesterday, 05:42
Where can be found the programming manual? Could you upload it somewhere?
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-30, 04:43
Pretty much all 440BX/PIIX4 boards I know of do not support 48-bit LBA which hard disks larger than 128GiB require. I wonder if this is simply a BIOS issue, or a limitation from PIIX4 itself. This is BIOS limitation, on low-level IDE port access proper LBA48 ATA commands can be used. So you just …
Re: Matrox Millennium II 16MB - exists? If so, why?
Posted on 2024-11-29, 19:44
ok, I'm happy with 1600*1200/truecolor desktop. Do you have any datasheet or programmer's manual for Millennium chip? Or you ported from Linux?
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-29, 14:54
Implementing standard common chipset in fast and expansive fpga doesn'tmake much sense. Coding tons of vhdl is not easy task either... COM and LPT ports are very usefull to connect with old hardware and various elctronic tools. For this reason I still use GB MB in signature that has LPT and COM, …
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-28, 13:51
Yes, I remember there was many headaches with alternative chipsets like via and even worse ali. I also was tired by it a lot in PII/III era. Once I switched to intel chipset MB everything magically started to work as it should and I found a peace after endless count of sleepless nights... 😀
Re: Data Expert EXP4044 ver. 1.0 (486 VLB) MB repair and VRM add
Posted on 2024-11-28, 13:44
This sounds like your MB has some bad solder joint or damaged via on PCB that cause random disconnection and thus failure. It's very hard/nearly impossible to find it. It probably go worse during time. One friend brought me some abit 486 PCI board to have a look on. He told that after some random …
Re: Data Expert EXP4044 ver. 1.0 (486 VLB) MB repair and VRM add
Posted on 2024-11-28, 01:39
I asked for it at beginning of thread but seems nobody have it. But why bother when common LM1084-ADJ easily fits in...
Re: Interposer for mobile Pentium MMX Tillamook
Posted on 2024-11-27, 00:22
Hi, how do you know it's glued? Core is not visible behind the foil. Mine was just soldered, no glue at all. I simply used heatgun and tweezer, just wait enough solder melt and it can freely move I picked it up... But I can imagine they glued the soldered pins like I did on interposer. Then it …
Re: Dual Pentium Pro Build Thread
Posted on 2024-11-26, 19:53
Yes, it makes sense. Disabling RD/WRMSR by NOPs should be easy. SMM/SMI handler is sill magic black box for me. I have some old awd bios sources but didn't digged inside so deep. I'm curious when SMM was commonly used first time on desktop systems. I know it was introduced in 486 CPU but it seems …
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-26, 17:41
If you have the adapter and the volts ppro should work in any slot 1 board. https://www.vogons.org/viewtopic.php?p=712306#p712306 Theoretically a BX with a good vrm could support all the way from the PPro 150 3.3v to Tualatin 1.4ghz 1.65v. I don't see any real reason fsb underclocking with the …
Re: Dual Pentium Pro Build Thread
Posted on 2024-11-26, 16:59
I'm interested in this adapter, good work! I have some CPU server card that can donor Socket 8 ZIF and some LX/BX MBs to try 😀 Do all MB needs BIOS mod or some just work with stock BIOS or just microcode update?
Re: Socket 8 --> Slot 1 Slotket Adapters
Posted on 2024-11-26, 13:05
Thanks, this I need to know! When it will be available, I'll like to make PCB myself...
Re: Data Expert EXP4044 ver. 1.0 (486 VLB) MB repair and VRM add
Posted on 2024-11-26, 04:10
Hm, mine works normal with pin 39. Maybe someone replaced KBC from other MB? Datasheet of i8042 shows that pin 39 is TEST1 input: TEST INPUTS: Input pins which can be directly tested using conditional branch instructions. FREQUENCY REFERENCE: TEST 1 (T1) functions as the event timer input (under …
Re: Socket 8 --> Slot 1 Slotket Adapters
Posted on 2024-11-26, 03:20
Oh, yes! They exist. But they don't work on BX boards as we already discussed here. :depressed: How many tries was done to confirm this? Couldn't it be just a single incompatability of specific MB/BIOS with PPro/slot1 adapter? If someone can try it use POST card to see if it would start POST …
Re: Data Expert EXP4044 ver. 1.0 (486 VLB) MB repair and VRM add
Posted on 2024-11-25, 23:33
Interesting, my MB had R63 - 270ohm, so the voltage was lower. It seems they did some development steps and maybe they also found that it's not 100% stable at 3,3V and decided to rise Vcore a bit... If you direct some air flow from CPU fan or PSU fan over LDO heatsink it could be OK...
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-25, 14:05
If you have the adapter and the volts ppro should work in any slot 1 board. https://www.vogons.org/viewtopic.php?p=712306#p712306 I don't but they wrote it doesnt work on BX anyway... Oh, yes! They exist. But they don't work on BX boards as we already discussed here. 😢 Did someone make a pcb design …
Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
Posted on 2024-11-24, 16:02
In my case the shipping from US is no-go, many times higher than eu... If you have K6-2 500 it's still good powerfull CPU if you have 100MHz FSB capable MB...
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-24, 15:34
Second page done. I managed to import BLOCK DIAGRAM from PDF thru SVG conversion, still required tons of manual text input This sounds interesting, what tool for pdf conversion do you use? It's some kicad plugin or indep. tool? Can in OCR also scanned pdfs or only some modern with vectors? but hey, …
Re: SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod
Posted on 2024-11-24, 15:05
Uh, not much comfortable seeing the CPU execution by bad work, I'm still looking for K2+ but they are not available for reasonable prices as in the past, an couldn't find any in my country...
Re: The thing no one asked for: KICAD 440bx reference schematic
Posted on 2024-11-23, 15:32
I get here because of reading "pentium pro" somewhere but not further explained here. Are you trying to design a new MB based on BX that would support all Ppro/PII/PIII CPUs? Via some slot1 variable modules? I only saw 440FX (or LX) boards that could operate with both Ppro and PII. Also interesting …
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