Greg Easthom wrote in a message to Roy J. Tellason:

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

 GE> I was wondering about that too.

I am currently plowing my way through bunches of video info I snagged for it...

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 label on 
RJT> package that it was in (bag) that it'll support a CPU up to a 233.

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

Apparently the speed can go up there quite a bit,  the package was wrong. 
  Looks like if I were to get my hands on a K6-3 chip I could
maybe go all the way up to 500MHz or so.  They do say that going to a FSB
speed of 83MHz is "overclocking the chipset" but don't seem to
think that's a problem.

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.

 GE> They say:

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

That adds up to 256M...

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

Yeah,  the chips would get confused if you tried to put a couple of
different kinds in there I guess?  :-)

I have some info here about memory,  but haven't gotten into it yet.

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

 GE> Probably no room with all those SIMM/DIMM slots.

I dunno,  the two other boards I have laying here on my desk don't seem to
have a problem in that regard.

 GE> I have another board where they're a bit higher, 1/4" from the CPU.
 GE> That board has 6 SIMMs and 2 DIMMs.

That's unusual in my experience,  the trend seems to be toward fewer
sockets unfortunately.

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

 GE> Depends on the board revision level.

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

Ok,  I see the pads where it would be if it were there.  

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

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

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

Same here.

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

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

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

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

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

Noted.

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.

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

Nope!  Although it sure beat the heck out of CGA...   :-)

Apparently the video stuff onboard can actually even go to somewhat higher
resolutions than that,  but you try to go too far in any given direction
and you start bumping into limitations due to memory bandwidth.  My
inclination at this point is to stick with the plug-in card I'm using,  and
to go with the onboard stuff if I move that board to server-only dedicated
operation,  where all I need is textmode.  That's assuming I can find the
right ribbon cable and such.

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!

GE> Got any defective (or just crappy) sound cards laying around?

Yeah,  as a matter of fact.

GE> Chop one up, leaving the metal plate and plugs, with just enough 
GE> board left to solder on a ribbon cable, and hold the sockets in 
GE> place. Slit a wider ribbon if there's no 10-wire ones around.

That's an interesting idea.  Looking at it I see a whole bunch of
surface-mount stuff right behind the plugs,  mostly right behind the game
port plug,  that I'd have to get out of my way first.

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

All I'd need is to snag the connector for the other end of the ribbon cable...

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

 GE> Squat diddly.

I've got a pile of stuff here to go through yet.

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

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

This ain't the first time the place where I got the board has given me the
wrong stuff.  Last time around they gave me serial headers that had blocked
holes,  which is fine,  except that the ports on the board weren't missing
any pins,  so I couldn't use 'em.  Fortunately I'm not doing anything with
serial ports in that box at the present time,  and have other ones on hand
anyway...

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

 GE> You Googled it... go explore.   :)

 GE> http://m571.com/m571/

That's where I found a whole bunch of the info I'm working my way through
now. I snagged the pdf manual they have there,  only trouble is that when I
bring it up in my default viewer it comes up sideways!  Gotta fiddle with
trying some other software with that,  but the one time I started it just
took too long... 

 GE> http://www.stud.fernuni-hagen.de/q3998142/pcchips/index.html
 GE> http://www.stud.fernuni-hagen.de/q3998142/pcchips/threads.html 

Noted.  That "M571" in your initial reply on this was enough to
get me going...  :-)

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