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# MULTIBEST INDUSTRIAL & MANUFACTURING, INC.
MB486EISA
Processor 80486DX
Processor Speed 33/50MHz
Chip Set Intel
Max. Onboard DRAM 32MB
Cache 64/128KB (on external CPU/SRAM card)
BIOS Phoenix
Dimensions 330.4mm x 218.4mm
I/O Options 32-bit external CPU/SRAM card slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Reset switch | J3 | Speaker | J8 |
|---------------+----------+----------------------+----------|
| Power LED & | J7 | 32-bit external | S1 |
| keylock | | CPU/SRAM card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | I/O recovery disabled | J1 | Open |
|---+----------------------------------+--------+------------|
| | I/O recovery enabled | J1 | Closed |
|---+----------------------------------+--------+------------|
| » | System bus posted write disabled | J2 | Open |
|---+----------------------------------+--------+------------|
| | System bus posted write enabled | J2 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | J6 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select color | J6 | Closed |
|---+----------------------------------+--------+------------|
| » | BIOS mode select normal | J10 | pins 1 & 2 |
| | operation (+5VPP) | | closed |
|---+----------------------------------+--------+------------|
| | BIOS mode select programmable | J10 | pins 2 & 3 |
| | (+12VPP) | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
|Size|Bank 0|Bank 1|Bank 2|Bank 3|Bank 4|Bank 5|Bank 6|Bank 7|
|----+------+------+------+------+------+------+------+------|
|1MB |256K x| NONE | NONE | NONE | NONE | NONE | NONE | NONE |
| | 36 | | | | | | | |
|----+------+------+------+------+------+------+------+------|
|2MB |256K x|256K x| NONE | NONE | NONE | NONE | NONE | NONE |
| | 36 | 36 | | | | | | |
|----+------+------+------+------+------+------+------+------|
|3MB |256K x|256K x|256K x| NONE | NONE | NONE | NONE | NONE |
| | 36 | 36 | 36 | | | | | |
|----+------+------+------+------+------+------+------+------|
|4MB |256K x|256K x|256K x|256K x| NONE | NONE | NONE | NONE |
| | 36 | 36 | 36 | 36 | | | | |
|----+------+------+------+------+------+------+------+------|
|4MB | 1M x | NONE | NONE | NONE | NONE | NONE | NONE | NONE |
| | 36 | | | | | | | |
|----+------+------+------+------+------+------+------+------|
|5MB | 1M x | NONE | NONE | NONE |256K x| NONE | NONE | NONE |
| | 36 | | | | 36 | | | |
|----+------+------+------+------+------+------+------+------|
|6MB | 1M x | NONE | NONE | NONE |256K x|256K x| NONE | NONE |
| | 36 | | | | 36 | 36 | | |
|----+------+------+------+------+------+------+------+------|
|7MB | 1M x | NONE | NONE | NONE |256K x|256K x|256K x| NONE |
| | 36 | | | | 36 | 36 | 36 | |
|----+------+------+------+------+------+------+------+------|
|8MB | 1M x | NONE | NONE | NONE |256K x|256K x|256K x|256K x|
| | 36 | | | | 36 | 36 | 36 | 36 |
|----+------+------+------+------+------+------+------+------|
|8MB | 1M x | 1M x | NONE | NONE | NONE | NONE | NONE | NONE |
| | 36 | 36 | | | | | | |
|----+------+------+------+------+------+------+------+------|
|9MB | 1M x | 1M x | NONE | NONE |256K x| NONE | NONE | NONE |
| | 36 | 36 | | | 36 | | | |
|----+------+------+------+------+------+------+------+------|
|10MB| 1M x | 1M x | NONE | NONE |256K x|256K x| NONE | NONE |
| | 36 | 36 | | | 36 | 36 | | |
|----+------+------+------+------+------+------+------+------|
|11MB| 1M x | 1M x | NONE | NONE |256K x|256K x|256K x| NONE |
| | 36 | 36 | | | 36 | 36 | 36 | |
|----+------+------+------+------+------+------+------+------|
|12MB| 1M x | 1M x | NONE | NONE |256K x|256K x|256K x|256K x|
| | 36 | 36 | | | 36 | 36 | 36 | 36 |
|----+------+------+------+------+------+------+------+------|
|12MB| 1M x | 1M x | 1M x | NONE | NONE | NONE | NONE | NONE |
| | 36 | 36 | 36 | | | | | |
|----+------+------+------+------+------+------+------+------|
|13MB| 1M x | 1M x | 1M x | NONE |256K x| NONE | NONE | NONE |
| | 36 | 36 | 36 | | 36 | | | |
|----+------+------+------+------+------+------+------+------|
|14MB| 1M x | 1M x | 1M x | NONE |256K x|256K x| NONE | NONE |
| | 36 | 36 | 36 | | 36 | 36 | | |
|----+------+------+------+------+------+------+------+------|
|15MB| 1M x | 1M x | 1M x | NONE |256K x|256K x|256K x| NONE |
| | 36 | 36 | 36 | | 36 | 36 | 36 | |
|----+------+------+------+------+------+------+------+------|
|16MB| 1M x | 1M x | 1M x | NONE |256K x|256K x|256K x|256K x|
| | 36 | 36 | 36 | | 36 | 36 | 36 | 36 |
|----+------+------+------+------+------+------+------+------|
|16MB| 1M x | 1M x | 1M x | 1M x | NONE | NONE | NONE | NONE |
| | 36 | 36 | 36 | 36 | | | | |
|----+------+------+------+------+------+------+------+------|
|17MB| 1M x | 1M x | 1M x | 1M x |256K x| NONE | NONE | NONE |
| | 36 | 36 | 36 | 36 | 36 | | | |
|----+------+------+------+------+------+------+------+------|
|18MB| 1M x | 1M x | 1M x | 1M x |256K x|256K x| NONE | NONE |
| | 36 | 36 | 36 | 36 | 36 | 36 | | |
|----+------+------+------+------+------+------+------+------|
|19MB| 1M x | 1M x | 1M x | 1M x |256K x|256K x|256K x| NONE |
| | 36 | 36 | 36 | 36 | 36 | 36 | 36 | |
|----+------+------+------+------+------+------+------+------|
|20MB| 1M x | 1M x | 1M x | 1M x |256K x|256K x|256K x|256K x|
| | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
|----+------+------+------+------+------+------+------+------|
|20MB| 1M x | 1M x | 1M x | 1M x | 1M x | NONE | NONE | NONE |
| | 36 | 36 | 36 | 36 | 36 | | | |
|----+------+------+------+------+------+------+------+------|
|24MB| 1M x | 1M x | 1M x | 1M x | 1M x | 1M x | NONE | NONE |
| | 36 | 36 | 36 | 36 | 36 | 36 | | |
|----+------+------+------+------+------+------+------+------|
|28MB| 1M x | 1M x | 1M x | 1M x | 1M x | 1M x | 1M x | NONE |
| | 36 | 36 | 36 | 36 | 36 | 36 | 36 | |
|----+------+------+------+------+------+------+------+------|
|32MB| 1M x | 1M x | 1M x | 1M x | 1M x | 1M x | 1M x | 1M x |
| | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Intel Turbocache part number |
|-----------------+------------------------------------------|
| 64KB | 82485MA |
|-----------------+------------------------------------------|
| 128KB | 82485MB |
|------------------------------------------------------------|
| Note:Intel Turbocache modules plug into CPU card located |
| in slot S1. |
+------------------------------------------------------------+