GE> Sounds just like the PC-Chips M571 I have sitting on my lap.

From a downloaded manual:

The advanced features of this mainboard include:

- 66MHz Advanced Graphic Port

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

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

- Four 72-pin SIMM sockets and two 168-pin DIMM sockets

- Supports 64M-bit (16Mx4, 8Mx8, 4Mx16) technology DRAM/SDRAM

- Supports onboard 64-bit 512KB L2 cache

- Provides dual 20-pin ATX power connector and AT 12-pin power
  connector, and ATX power support Modem Ring On & Suspend Switch

- Supports both ACPI and Legacy PMU

- 4 PCI Local Bus slots and 3 16-bits ISA Bus slots, all 4 PCI
  slots support master mode

- Supports Ultra DMA/33, PCI Bus Master IDE interface onboard
  with 2 connectors which support 4 IDE devices in 2 channels;
  the PCI IDE controller supports PIO Mode 0 to Mode 4 and Ultra
  DMA/33 at maximum transfer rate of 33MB/s and Bus Master IDE
  DMA Mode 2

- System BIOS supports 4 IDE hard disk drives which do not need
  device driver for S/W application and the capacity of each hard
  disk can be larger than 528MB and up to 8.4 GB

- Onboard super Multi-I/O chip supports 2 serial ports with 16550
  fast UART compatible, 1 parallel port with EPP and ECP capabilities,
  and one floppy disk drive interface

- System BIOS supports Green feature function and Plug & Play
  Flash ROM

- Supports PS/2 Mouse connector, the Universal Serial Bus interface
  (U.S.B.), and Infrared connectors

- Supports embedded 64-bit VGA chip:
  - high performance 64-bit GUI accelerator with excellent video
    playback capability,
  - system memory shares up to 4MB with video buffer,
  - high resolution graphic modes 640x480/800x600/1024x768

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

RJT> First off,  what I took to be the typical "intel inside" thingy on
RJT> one of the chips -- on a heatsink,  which should've tipped me off
RJT> was "Video Inside"!  The rest of what's on there is
"TX PRO-II".

RJT> There also seems to be a 2x8 pin header on the board near the power
RJT> connectors

VGA - On-board VGA connector (shares system memory).
JP3 (vertical jumper to right of SIMMs) 1-2 to disable.

RJT> There's a PS/2 pin header up by the keyboard connector

PS2 - Mouse

RJT> what must be the two serial ports,  and the parallel and floppy
RJT> interface connectors are about where I'd expect them, between the
RJT> ram and the first PCI connector.  But the two IDE connectors aren't
RJT> there -- they're all the way down at the bottom end of the board,
RJT> below the CPU chip.

Only a pain if your HDs mount in the top of the case.

RJT> In between the first and second PCI connectors is another pin
RJT> header,  2 rows by 9 pins long,  missing one pin.

That would be for an "ATX FORM CARD" containing 1xPS2, 2xUSB and
2xIR connectors.

RJT> Then down near the bottom edge of the board,  I get another
RJT> surprise -- there's a chip next to the BIOS part that says "Sound
RJT> Pro" on it -- I apparently have onboard sound too?

Yep.

RJT> There's a 2-pin header near that chip,  only marked as "JP10",

JP10 - Digital audio (Depends on CD-ROM type)

RJT> and another 2-pin header,

JP9 - Microphone type (open=normal closed=special)

RJT> a 4-pin header,

J4 - Analog audio (Sony style)

RJT> and a 4-pin connector with white plastic shell of the type commonly
RJT> found on sound cards,  which I'm assuming is for cdrom input.

J5 - Analog audio (Panasonic style)

RJT> Also a 10-pin header.

J6 - Connects via ribbon cable to line-in, MIC, line-out header.

RJT> There's another pin header labeled for the game port, as well.

GAME - Joystick, whatever.

RJT> Then there's a 3-pin header on the other side of the sound and BIOS
RJT> chips labled "12V JP1 5V" with a jumper across the last two.

JP1 - Flash EPROM voltage selector

RJT> And one following that,  5 positions with the middle one empty,
RJT> marked "1 2 J1 4 5".

J1 - 4&5 connect to the power button for ATX mode.

RJT> Only ID I can find on this board is a sticker on the last ISA slot,
RJT> that says "MW84321402 Made In China",  which ain't telling me much.

Mine says MW84350035
Another sticker on the right edge says MB-M571-512K

RJT> I just realized that what they gave me for headers doesn't include
RJT> anything for the onboard stuff,  just the standard serial and
RJT> parallel connectors,  and that's it.  And I called them, and can
RJT> take it back tomorrow if necessary...

You don't HAVE to use the onboard stuff.  :)


  * SLMR 2.1a *

--- Maximus 3.01