78h6488.exe 320 / 520 EISA Config Disk >133 MHz v4.02 (readme) (zipped image)
62h6806.exe 320 / 520 EISA Config Disk =<133 MHz v3.30 (readme) (zipped image)
m76h4891.exe EISA Flash BIOS v16T3B (any processor speed) (zipped image)
194-180 IBM PC Server (EISA Models)
320/520 PCI/EISA Planar FRU P/N 12J4534 or 12J4534 (Exx models)
This appears to be a rebadged Micronics M54Pe motherboard.
![](Planar_EISA.gif)
J1,2,26 Power Supply Connector
(P1 to J1, P2 to J2, P3 to J26)
J6 Mouse Connector
J8 Keyboard Connector
J9 Parallel Port Connector
J10 Floppy Drive Connector
J11 Serial Port Comm A
J12 Serial Port Comm B
J13 ISA IDE Connector
W12,31 Speaker
W18,37 Power LED (1-3)
W24,38 IDE Hard Drive LED
W35 CPU Fan Connector
W36 CPU Fan Connector
System Board Jumpers
W1 L1 Cache Mode
Open = L1 Write-Back (default)
Closed = L1 Write-Through
W5 L2 Cache Size
Pin 1-2 = 256K (default)
Pin 2-3 = 512K
W10 L2 Cache Size
Pin 1-2 = 256K (default)
Pin 2-3 = 512K
W11 Jumper is not available; Reserved (2-3) on board FRU P/N 76H0469
W16 Reserved (1-2)
W17 Reserved (Closed)
(Without jumper on W17 -> won't accept BIOS flash!
You will see Error Msg. error 0024: Vpp low Error Detected)
W20 Monitor Select
Open = Monochrome / Closed = Color (default)
W21 Reserved (Closed)
Open = AT style Keyboard
Closed = PS/2 style Keyboard/Mouse (default)
W22 Reserved (Open)
W23 Reserved (Open)
W25 ISA IDE IRQ select
Pin 1-2 = ISA IDE using IRQ 14 (Primary IDE default)
Pin 2-3 = ISA IDE using IRQ 15 Secondary IDE
W30 Reserved (Open)
W41 Parity
Closed = default
W42 Number of installed processors; Reserved (Open) on board FRU P/N 76H0469
Closed = Single Processor
Open = Dual Processor
CPU Speed Settings (Board w/o jumper W27 & W28, FRU P/N 06H2173)
CPU speed (ext/int) | W2 | W6 | W40 |
50/75 MHz | Open | 2-3 | Closed |
60/90 MHz | Open | 1-2 | Open |
66/100 MHz | Open | 2-3 | Open |
66/133 MHz | Closed | 2-3 | Open |
CPU Speed Settings (Board with jumper W27 & W28, FRU P/N 12J4534)
CPU speed (ext/int) | W2 | W6 | W27 | W28 | W40 |
50/75 MHz | Open | 2-3 | Open | Open | Closed |
60/90 MHz | Open | 1-2 | Open | Open | Open |
66/100 MHz | Open | 2-3 | Open | Open | Open |
66/133 MHz | Closed | 2-3 | Open | Open | Open |
66/166 MHz | Closed | 2-3 | Closed | Closed | Open |
66/200 MHz | Open | 2-3 | Closed | Closed | Open |
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