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# ADVANCED INTEGRATION RESEARCH, INC.
486EI REV. 1.2
Processor 80486SX/80487SX/P23T/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/80(internal)/100(internal)MHz
Speed
Chip Set SIS
Max. 256MB
Onboard
DRAM
Cache 128/256/512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (3)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Reset switch | J6 | Turbo switch | J22 |
|---------------+----------+----------------------+----------|
| Speaker | J8 | Turbo LED | J24 |
|---------------+----------+----------------------+----------|
| Power LED & | J9 | 32-bit VESA local | SL1 - |
| keylock | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 512K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 512K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 256K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 2M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 11MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 26MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 8M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 35MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 38MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 44MB | (1) 8M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x | (1) 2M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 49MB | (1) 256K x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 50MB | (1) 512K x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 56MB | (1) 8M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 56MB | (1) 2M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 8M x | (1) 8M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 16M x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 512K x | (1) 8M x | (1) 8M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 16M x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 66MB | (1) 16M x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 67MB | (1) 16M x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 16M x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 16M x | (1) 1M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 70MB | (1) 16M x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 16M x | (1) 1M x | (1) 1M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 16M x | (1) 2M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 76MB | (1) 16M x | (1) 1M x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 16M x | (1) 2M x | (1) 2M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 16M x | (1) 4M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 88MB | (1) 16M x | (1) 2M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 16M x | (1) 4M x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 16M x | (1) 8M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 97MB | (1) 256K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 98MB | (1) 512K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 100MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 104MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (1) 16M x | (1) 16M x | (1) 16M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 256MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 16M x |
| | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | NONE |
|------------------+--------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
|------------------+--------------------+--------------------|
| 512KB | (4) 128K x 8 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JC4 | JC5 | JC9 |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 1 & 2 | pins 1 & 2 | pins 4 & 5 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J1 | J2 | J3 |
|-----------------+--------+----------------+----------------|
| 80486SX | Open | Open | pins 2 & 3 |
| | | | closed |
|-----------------+--------+----------------+----------------|
| P23T | Closed | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| 80487SX | Closed | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| 80486DX | Closed | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| 80486DX2 | Closed | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| 80486DX4 | Closed | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| Pentium | Closed | pins 2 & 3 | pins 1 & 2 |
| Overdrive | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J01 | J02 | JL2 |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 66iMHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 80iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP12 |
|----------------------------+-------------------------------|
| 3.3v | pins 3 & 5, 4 & 6 closed |
|----------------------------+-------------------------------|
| 5v | pins 1 & 3, 2 & 4 closed |
+------------------------------------------------------------+