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# ATC/UNITRON COMPUTERS & COMPUTER PARTS
MB532
Processor Pentium
Processor 75/90/100/120/133MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, serial ports (2), cache slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | VRM module | JP20 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Speaker | JP21 |
|-------------------+----------+------------------+----------|
| Parallel port | CN3 | Power LED & | JP22 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Floppy drive | CN4 | Reset switch | JP23 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | Green PC | JP24 |
| | | connector | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| IDE interface LED | JP7 | Cache slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP2 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP2 | Closed |
|---+----------------------------------+--------+------------|
| » | BIOS type select EPROM/5v flash | JP3 | Open |
|---+----------------------------------+--------+------------|
| | BIOS type select 12v flash | JP3 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| | AT bus clock select CPU speed/8 | JP12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | AT bus clock select CPU speed/6 | JP12 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 8MB | NONE | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 16MB | NONE | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 32MB | NONE | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 64MB | NONE | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG | SL1 |
|-------------+--------------+-------------+-----------------|
| 256KB (A) | (8) 32K x 8 | (1) 8K x 8 | Not installed |
|-------------+--------------+-------------+-----------------|
| 256KB (B) | NONE | (1) 8K x 8 | Installed |
|-------------+--------------+-------------+-----------------|
| 512KB (A) | (8) 64K x 8 | (1) 16K x 8 | Not installed |
|-------------+--------------+-------------+-----------------|
| 512KB (B) | NONE | (1) 16K x 8 | Installed |
|------------------------------------------------------------|
| Note: The location of Bank 0 and TAG is not exact. It is |
| shown for approximate location purposes only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CLOCK SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP8 | JP9 |
|-------------------+--------------------+-------------------|
| 50MHz | Closed | Closed |
|-------------------+--------------------+-------------------|
| 60MHz | Open | Closed |
|-------------------+--------------------+-------------------|
| 66MHz | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU INTERNAL CLOCK SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP16 | JP17 |
|-------------------+--------------------+-------------------|
| 1.5x | Open | Open |
|-------------------+--------------------+-------------------|
| 2x | Closed | Open |
|-------------------+--------------------+-------------------|
| 2.5x | Closed | Closed |
|-------------------+--------------------+-------------------|
| 3x | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP11 |
|----------------------------+-------------------------------|
| 3.3v | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3.5v | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | JP4 | JP5 |
|------------------+--------------------+--------------------|
| DMA 1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DMA 3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+