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486 PCI Motherboard w/ 586 133mhz Cpu and 8mb ram - $40 shipped

It is kind of strange that it has built in IDE, Floppy, etc, but I've got one (older revision), and it is a '94ish 486 board, so it's going into the Pentium era.
 
Tiberian Fiend said:
Were there ever any 512MB 486 boards?
Click to expand...
Don't think so. Hell quite a few Pentium board Chipsets could not deal with that much RAM.

Not exactly what you are looking for but interesting, here are some Pentium chipsets with RAM limits and caching limits:

http://www.makeitsimple.com/modules.php?name=Content&pa=showpage&pid=9&page=6

Chipset
Interface
Cache Limit
Total DRAM Limit

Intel 430FX
Socket 7
64 MB
128 MB

Intel 430VX
Socket 7
64 MB
128 MB

Intel 430HX
Socket 7
512 MB*
512 MB

Intel 430TX
Socket 7
64 MB
256 MB

ALi Aladdin IV
Socket 7
64 MB**
1024 MB

ALi Aladdin V
Socket 7
512 MB
1024 MB

SiS 5571
Socket 7
64 MB
384 MB

SiS 5597/98
Socket 7
128 MB
384 MB

VIA VXPro/+
Socket 7
64 MB
128 MB

VIA VP1
Socket 7
512 MB
512 MB

VIA VP2
Socket 7
512 MB
512 MB

VIA VPX/97
Socket 7
512 MB
512 MB

VIA VP3
Socket 7
1024 MB
1024 MB

VIA MVP3
Socket 7
1024 MB
1024 MB

VIA Apollo Pro
Slot 1
1024 MB
1024 MB

Intel 440FX
Slot 1/Socket 8
1024 MB
1024 MB

Intel 440LX
Slot 1
512 MB***
512 MB

Intel 440BX
Slot 1
512 MB
512 MB

Intel 440GX
Slot 1
2048 MB
2040 MB


* The 430HX only supports 512 MB with a specific Tag RAM. Otherwise, the chipset only supports 64 MB.

**The Aladdin IV can support higher amounts of memory only with certain Tag RAMs. For most boards there is a 64 MB limit.

*** The 440LX supports 512 MB of SDRAM, but can support up to 1024 MB of EDO DRAM.
 
This list a few Intel 486 chipsets (plus newer ones):

http://en.wikipedia.org/wiki/List_of_Intel_chipsets#80486_chipsets

80486 chipsetsChipset Code Name Part Numbers South Bridge Release Date Processors FSB SMP Memory types Max. memory Parity/ECC L2 Cache Type PCI support
420TX Saturn 82424TX, 82423TX SIO November 1992 5 V 486 Up to 33 MHz No FPM 128 MB[11] Parity Async. 2.0
420EX Aries 82425EX 82426EX March 1994 5 V/3.3 V 486 Up to 50 MHz No FPM 128 MB Parity Async. 2.0
420ZX Saturn II 82424ZX, 82423TX SIO March 1994 5 V/3.3 V 486 Up to 33 MHz No FPM 160 MB Parity Async. 2.1


None can do more then 160MB.
 
If the machine has EISA, likelyhood is it support more then 128mb ram. I seem to recall my Prolinea 1000 486 Server if I upgraded to the socket 2 board supported 256mb max, ECC parity simms. Downside is most EISA boards do not support regular el cheapo 72 pin simms, and finding the correct parity simms over 32mb each is near impossible, nonetheless possible...
 
I was considering stuffing Windows 7 or 8 onto a 486 system to see how long it takes to boot. As a thought experiment, how difficult would it be to modify a Pentium 3 or 4 motherboard to accept Socket 3 chips, as to have the full 4GB?
 
Tiberian Fiend said:
I was considering stuffing Windows 7 or 8 onto a 486 system to see how long it takes to boot. As a thought experiment, how difficult would it be to modify a Pentium 3 or 4 motherboard to accept Socket 3 chips, as to have the full 4GB?
Click to expand...

Windows 7 far as I know has a 256mb ram (even after hex editing the iso, think original is 512mb) requirement, so putting 7 onto a 486 I don't believe is possible. Also, Win7 I believe requires a motherboard that supports ACPI. You may be able to get one of the release canidates to work, but pretty sure your SOL on RTM. You may be able to get an EISA system to install it , but good luck using any isa card drivers. I don't believe 7 has any native ISA support. :S

So only way I see of being able to do this is, not with this pci board, but an EISA system, and even then finding drivers is going to be a problem... So unless you find an EISA system with a few pci slots too, I dont see it being able to work.

As for using a differently designed motherboard, I can't even fathom how to answer that easily LoL. You could start with trying to reverse engineer an early socket5 motherboard. That might work MAYBE with a 5x86 or Overdrive... If you research you may be able to find 2 motherboards that are identical other then the socket if your lucky. I look at SiS and Ali boards, as well as opti. I suggest searching for boards using generic chipsets.

Wish you luck on your search :)
 
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twolazy said:
Windows 7 far as I know has a 256mb ram (even after hex editing the iso, think original is 512mb) requirement, so putting 7 onto a 486 I don't believe is possible.
Click to expand...
Even Windows XP won't boot on anything less than a Pentium-class CPU. It will refuse to boot on a 486, 5x86, or even early Cyrix 6x86 chips which did not set the CPU_ID flag to indicate that they were a Pentium-class CPU.

I have no idea if a Pentium Overdrive in a 486 motherboard would be good enough to run XP, but in any event it'd be so slow that it wouldn't be worth the trouble.
 
I ended up grabbing the last of these -- mostly because I know that board and CPU -- used to set the bus to 50mhz with 3x multiplier to take that AMD to 150mhz...(which makes it about equal performance-wise to a P90) which oddly enough is in specification but not what it was sold as; they did that because the number of motherboards that could let you set 50mhz FSB could be counted on one hand.

I also happen to have a pair of 16 meg and a stack of 8 meg 72 pin SIMM's sitting here not doing anything. 48 megs of RAM should be more than enough for anything I'd use it for.
 
That looks like a very nice, compact board. If I didn't already have a few M919's, I'd have been tempted. Interesting that it has the 50mhz FSB
 
I bought one and it's on the way. I couldn't resist. Those PCI slots were irresistible .
 
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My dell 486 XPS has undocumented FSB of 40 and 50 (Micronics Chipset, good stuff :thumbsup: ), so can't wait for this weekend. Finally installing the 5x86 chip I always wanted into it ^_^. Aiming for 160(4*40) first, then 150 (3*50). Ordered the last voltage converter from trinityworks not 2 weeks ago (paid 18 bux). Received it day I posted the thread. Pairing it with a brand new 5x86 133 ADZ. Wish I had seen these boards not a week sooner, I have bought one of them instead. Question is will my VLB video card hold up at those speeds, I just don't know... :S Sure be a ton easier with pci cards... Doh! >.<

Congrats!!! Look like killer motherboards for 486 lovers. I be jealous! xD
 
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50Mhz and VLB cards generally don't mix (especially if you have more then 1). If you are going to play with 50Mhz FSB you will need a PCI board not VLB.
 
Got mine, works like a champ... kinda sad I'm not actually using the 8 meg stick it came with since I have a nice matching pair of 16 EDO and 8 EDO. The 16's are Dell OEM, the 8's are IBM... Ah well, another stick in the RAM box.

Had to hunt for a PCI video card for it -- My Trident 4000 is dead, and I already knew my S3 Virge was a writeoff... started digging through my junk bin when I came across a card I didn't recognize; no name silkscreened on it, heat sink (no fan) glued to the GPU...

Power it up, TNT2 M64 -- a lot more video card than I was expecting.... Good thing too, I didn't want to use an ISA card... never realized I had so many AGP video cards -- I've got a STACK of them, and they all work. Shame my voodoo 2 needs a reflow.

Makes a great replacement for the AMD 386/40 I had that I had to retire for being a bit... unstable. Trying to decide on audio again -- Logitech Soundman Wave, Orchard Oak, AWE32 or AWE64 -- decisions, decisions...

For those interested, to put that at 50mhz base and 3x...

J18 - multiplier
on 2x/4x
off 3x

50mhz base clock:
J1 1-2
J2 2-3
J3 2-3

The 50 bus with 3x internal really seems to be the best performing of the options for it.

Oh, and the actual manual can be found here:
http://www.ace-repair.com/drivers/i...vYXJkcy9TaHV0dGxlL0hvdCA0MzMgVmVyIDQvTWFudWFs

Which is a wee bit more helpful than the Tularc page, since it actually lists clock and multiplier selects in addition to CPU setting.
 
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Shadow,

Got mine the other day. I haven't had chance to fire it up yet. I was kind of surprised to see a stick of RAM in one of the memory slots. One thing that I'm slightly concerned with is that the BIOS memory is a product of the DS12887A RTC. It would have been nice if it was mounted in a socket. Upon inspecting the mobo, I noticed a 'circle' on the PCB between the ISA slots and the jumper cluster - just north of the BIOS chip. I'm wondering if that may have been intended for a CR2032 type battery backup? What do you think? When you get around to running something, like Doom maybe, let us know how that TNT2 is working out for you. I'm going to go with the Matrox Millenium and then give the Voodoo a try. I may be in the market for something a little more exotic, but what ever I get it's going to have to have drivers readily available for WIN95/98SE.
 
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