RJT>  GE> - 66MHz Advanced Graphic Port
RJT> No AGP on this unless it's that built-in video,  possible I suppose.

I was wondering about that too.

RJT>  GE> - Supports either P54C/P55C Pentium (MMX) CPUs with 321-pin ZIF
RJT>  GE> socket and Cyrix/IBM 6x86L/6x86MX (M2), AMD K6, IDT C6 Processors
RJT>  GE> with External Clock Speed at 50/55/60/66/75/83 MHz

RJT> I don't think the speeds go that high.  It says on the
RJT> label on package that it was in (bag) that it'll support a
RJT> CPU up to a 233.

Technically, if you use the 83MHz external, with a 5.5 multiplier,
you'd get 456MHz, but you'd probably melt lots of parts too.  :)

RJT>  GE> - Supports 3 banks of FP/EDO SIMM/DIMM and SDRAM DIMM expandable
RJT>  GE> memory up to 384MB

RJT> There are four SIMM sockets and two DIMM sockets on there.
RJT> I don't see how that goes up that high,  though.

They say:

SIMM 1/2 - 0 + 0
SIMM 3/4 - 128 + 128
DIMM 1   - 64
DIMM 2   - 64

They also say:
"the manufacture does not recommend the mixed mode DRAM usage."

RJT> The two IDE connectors are down at the bottom edge of the board,
RJT> near the CPU regulators.

Probably no room with all those SIMM/DIMM slots.
I have another board where they're a bit higher, 1/4" from the CPU.
That board has 6 SIMMs and 2 DIMMs.

RJT> I haven't looked for the IR connector,  but assume that it's probably
RJT> there.

Depends on the board revision level.

Reference 1 - "Total Hardware 99"
Picture shows it as a 4-pin between the battery and JP2,
between PCI3 and PCI4.
IR - Infrared Connector
1 - IR In
2 - Ground
3 - IR Out
4 - +5VDC

Reference 2 - "m571.PDF"
Picture doesn't show the 4-pin but does show the 18-pin between
PCI1 and PCI2, but text at above.

Reference 3 - "m571v32.PDF"
Picture: no 4-pin, yes 18-pin.
Text section (as part of 18-pin J7 ATX Form Card connector):
 7 - Ground
 8 - Reserved
 9 - +5VDC
17 - IR In
18 - IR Out

On my board, where the 4 pins should be are just unused solder blobs.

The rest of the 18-pin header is listed as:

USB1
1  +5VDC
2  Data-
3  Data+
4  Ground

USB2
10 +5VDC
11 Data-
12 Data+
13 Ground

PS/2 Mouse
5  +5VDC
6  MouseCLK
15 MouseData
16 Ground

I found a picture of an "ATX Form Factor Card"
http://www.sprintcomputer.com/motherb/h-atxfc.html

RJT>  GE>   - high resolution graphic modes 640x480/800x600/1024x768

RJT> They're calling 1024x768 "high" resolution?  Not these
RJT> days,  apparently,  though many of my monitors here won't
RJT> cope with even that,  much less higher.

Hey, remember when 16 colors AT THE SAME TIME made you swoon?

RJT> RJT> That's the other part I'd *really* need to get a hold of
RJT> RJT> in order to use this.  No point in trying to do anything at
RJT> RJT> all with the onboard sound if I can't plug in the speakers!

Got any defective (or just crappy) sound cards laying around?
Chop one up, leaving the metal plate and plugs, with just enough board
left to solder on a ribbon cable, and hold the sockets in place.
Slit a wider ribbon if there's no 10-wire ones around.

 Sockets        Wires at 10-pin plug
Line-In  tip    1 (stripe)
Line-In  mid    2
Line-In  base   3
MIC      tip    4
MIC      mid    5
MIC      base   6
 n/c            7
Line-Out tip    8
Line-Out mid    9
Line-Out base  10

RJT>  GE> J1 - 4&5 connect to the power button for ATX mode.
RJT> Ok.  Any indication for the rest of those pins?

Squat diddly.

RJT> one that's a DB9 _female_ connector with a 10-pin header on
RJT> the other end,  dunno what that one's for.

No idea. I thought old video (CGE/EGA) but the board header
has too many pins.

RJT> What can you tell me about possible ram configurations
RJT> Do you know of any online data for this MB?

You Googled it... go explore.   :)

http://m571.com/m571/
http://www.stud.fernuni-hagen.de/q3998142/pcchips/index.html
http://www.stud.fernuni-hagen.de/q3998142/pcchips/threads.html

  * SLMR 2.1a *

--- Maximus 3.01