This document is for the XCP Mini-sized (9.5" x 8.5") ISA-Bus motherboard.
The part number for this board is 09-00164-xx.
It's identifying features are: an LED at the end of expansion slots #7 ; six 16-bit
expansion slots; one 8-bit expansion slot; four sockets for SIMMs; a socket
for an OverDrive CPU
The ISA bus speed for this motherboard is set at 8.33MHz. The CPU clock speed is
determined by the Oscillator. If the CPU is a 486SX-25, or 486DX2-50, the Bus
clock speed is 1/3. For the 486SX-33, 486DX-33, or 486DX2-66, CPUs the Bus
clock speed is 1/4 and the 486DX50 requires 1/6 bus clock speed.
The following shows all of the possible memory configurations.
MEMORY CHART CONFIGURATION
===================================
Memory Banks
----------------------------
MB 0 1 2 3
---- ---- ---- ---- ----
1MB 1M
2MB 1M 1M
4MB 4M
6MB 1M 1M 4M
8MB 4M 4M
10MB 1M 1M 4M 4M
12MB 4M 4M 4M
16MB 4M 4M 4M 4M
16MB 16M
18MB 1M 1M 16M
20MB 4M 16M
24MB 4M 4M 16M
32MB 16M 16M
36MB 4M 16M 16M
40MB 4M 4M 16M 16M
48MB 16M 16M 16M
64MB 16M 16M 16M 16M
In the table above, 1M indicates that one 256x36 SIMM is installed in the socket,
4M indicates that one 1Mx36 SIMM is installed in the socket, 16M indicates that,
one 4Mx36 SIMM is installed in the socket.
Micronics Computers has tested and verified the following 1Mx36 memory brands:
Micron Technologies, Mitsubishi, Samsung, Texas Instruments, Toshiba
Micronics Computers has tested and verified the following 4Mx36 memory brands:
Mitsubishi, Samsung, Toshiba
+=============================+
+ +
+ MOTHERBOARD JUMPER SETTINGS +
+ +
+=============================+
J18 External speaker
Pin 1 - Speaker
Pin 2 - no connector
Pin 3 - Ground
Pin 4 - +5 volts DC
J19 Keylock / Power LED
Pin 1 - Power LED signal
Pin 2 - no connector
Pin 3 - Ground
Pin 4 - Keyboard lock signal
Pin 5 - Ground
W12 CPU selection
Pins 1-2 i487SX , Overdrive SX
Pins 2-3 i486SX, i486DX, i486DX2
W13 Reset switch
Pin 1 - Signal
Pin 2 - Ground
W14 Turbo LED
Pin 1 - Signal
Pin 2 - Ground
W15 Turbo switch
Pin 1 - Signal
Pin 2 - Ground
W1 Clearing CMOS Setup
Temporarily install jumper to Pins 2-3, normal settings are 1-2
W3 Color / Monochrome Display
COLOR - Installed *
MONO - Open
+==========================+
+ +
+ Cache Configuration +
+ +
+==========================+
W7 W9 W10 W17 W18
64K Cache 2-3 1-2 2-3 1-2 1-2 (9) 8k X8 Sram -20Ns for U1, U2, U9, U10, U16, U17, U18, U19 & U45
128k 1-2 2-3 1-2 2-3 1-2 (5) 32kX8 Sram -20Ns for U1, U2, U9, U10 & U45
256k 2-3 2-3 2-3 2-3 2-3 (9) 32kX8 Sram -20ns for U1, U2, U9, U10, U16, U17, U18, U19 & U45
+==========================+
+ +
+ Additional Information +
+ +
+==========================+
The Mini 486 Motherboard does not require an external battery to be installed.
The Dallas / Benchmarq Real Time Clock Chip contains an internal battery for an approximate lifetime of 8-10 years.