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# ACHME COMPUTER, INC.
MS-5123
Processor CX M1/Pentium
Processor 75/80/90/100/120/133MHz
Speed
Chip Set SIS
Max. Onboard 512MB
DRAM
Cache 256/512/1024KB
BIOS Award
Dimensions 280mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, PS/2 mouse interface, serial ports (2), VGA
feature connector, VGA interface, VRM connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+----------------+------------|
| Serial port 1 | CN1 | Speaker | JFP pins 6 |
| | | | - 10 |
|-------------------+----------+----------------+------------|
| Serial port 2 | CN2 | Turbo LED | JFP pins |
| | | | 12 & 13 |
|-------------------+----------+----------------+------------|
| Parallel port | CN3 | Turbo switch | JFP pins |
| | | | 15 - 17 |
|-------------------+----------+----------------+------------|
| VGA interface | CN4 | Reset switch | JFP pins |
| | | | 19 & 20 |
|-------------------+----------+----------------+------------|
| Floppy drive | CN5 | IDE interface | JFP pins |
| interface | | LED | 21 & 22 |
|-------------------+----------+----------------+------------|
| IDE interface 2 | CN6 | Green PC | JG1 |
| | | connector | |
|-------------------+----------+----------------+------------|
| IDE interface 1 | CN7 | Green PC LED | JG2 |
|-------------------+----------+----------------+------------|
| External battery | JB1 | 32-bit PCI | PC1 - PC3 |
| | | slots | |
|-------------------+----------+----------------+------------|
| Chassis fan power | JFAN | PS/2 mouse | PSM |
| | | interface | |
|-------------------+----------+----------------+------------|
| VGA feature | JFC | VRM connector | VRM |
| connector | | | |
|-------------------+----------+----------------+------------|
| Power LED & | JFP pins | | |
| keylock | 1 - 5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+-----------+-------------|
| » | PS/2 mouse IRQ12 enabled | JP11 | Closed |
|---+------------------------------+-----------+-------------|
| | PS/2 mouse IRQ12 disabled | JP11 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | NONE | NONE | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | (1) 8M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 64MB | NONE | NONE | (1) 16M x | NONE |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | NONE | NONE | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 32M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 128MB | NONE | NONE | (1) 32M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | NONE | NONE | (1) 16M x | (1) 16M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 136MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 136MB | (1) 16M x | (1) 16M x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 144MB | (1) 16M x | (1) 16M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 144MB | (1) 2M x 36 | (1) 2M x | (1) 16M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (1) 16M x | (1) 16M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (1) 16M x | (1) 16M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (1) 8M x 36 | (1) 8M x | (1) 16M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 256MB | (1) 32M x | (1) 32M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 256MB | NONE | NONE | (1) 32M x | (1) 32M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 256MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 16M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 264MB | (1) 1M x 36 | (1) 1M x | (1) 32M x | (1) 32M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 264MB | (1) 32M x | (1) 32M x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 272MB | (1) 2M x 36 | (1) 2M x | (1) 32M x | (1) 32M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 272MB | (1) 32M x | (1) 32M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 288MB | (1) 4M x 36 | (1) 4M x | (1) 32M x | (1) 32M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 288MB | (1) 32M x | (1) 32M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 320MB | (1) 8M x 36 | (1) 8M x | (1) 32M x | (1) 32M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 320MB | (1) 32M x | (1) 32M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 384MB | (1) 16M x | (1) 16M x | (1) 32M x | (1) 32M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 384MB | (1) 32M x | (1) 32M x | (1) 16M x | (1) 16M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 512MB | (1) 32M x | (1) 32M x | (1) 32M x | (1) 32M x |
| | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | U13/U17 | TAG |
|--------+-------------+------------+-----------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | NONE | (1) 8K or |
| | | 8 | | (1) 16K x |
| | | | | 8 |
|--------+-------------+------------+-----------+------------|
| 256KB | NONE | NONE | (2) 32K x | (1) 8K or |
| | | | 32 | (1) 16K x |
| | | | | 8 |
|--------+-------------+------------+-----------+------------|
| 512KB | (4) 64K x 8 | (4) 64K x | NONE | (1) 16K x |
| (A) | | 8 | | 8 |
|--------+-------------+------------+-----------+------------|
| 512KB | (4) 64K x 8 | (4) 64K x | NONE | (1) 16K x |
| (B) | | 8 | | 8 |
|--------+-------------+------------+-----------+------------|
| 1MB | (4) 128K x | (4) 128K x | NONE | (1) 32K x |
| | 8 | 8 | | 8 |
|------------------------------------------------------------|
| Note: U13 & U17 may not be present on all boards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 |
|-------------+-------------------------+--------------------|
| 256KB | pins 1 & 2 closed | pins 2 & 3 closed |
|-------------+-------------------------+--------------------|
| 512KB (A) | pins 3 & 4 closed | pins 3 & 4 closed |
|-------------+-------------------------+--------------------|
| 512KB (B) | pins 2 & 3 closed | pins 2 & 3 closed |
|-------------+-------------------------+--------------------|
| 1MB | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: 512KB (A) uses 128AK TAG chip and 512KB (B) uses |
| 129AK TAG chip. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
|---------+--------+--------+--------+-------+-------+-------|
| 75MHz | Off | Off | Off | Off | On | On |
|---------+--------+--------+--------+-------+-------+-------|
| 80MHz* | Off | Off | Off | On | On | On |
|---------+--------+--------+--------+-------+-------+-------|
| 90MHz | Off | Off | Off | Off | Off | On |
|---------+--------+--------+--------+-------+-------+-------|
| 100MHz | Off | Off | Off | Off | Off | Off |
|---------+--------+--------+--------+-------+-------+-------|
| 120MHz | Off | On | Off | Off | Off | On |
|---------+--------+--------+--------+-------+-------+-------|
| 120MHz* | On | Off | Off | On | On | On |
|---------+--------+--------+--------+-------+-------+-------|
| 133MHz | Off | On | Off | Off | Off | Off |
|------------------------------------------------------------|
| Note: Speeds marked with an * are reserved for future CX |
| M1 CPUs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JV1 |
|-------------------------------+----------------------------|
| 3.38v | Closed |
|-------------------------------+----------------------------|
| 3.52v | Open |
+------------------------------------------------------------+