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# MECER CORPORATION
B800/B820 (REV. A)
Processor 80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387DX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+-----------+--------------+-----------|
| External battery | JP2 | Speaker | JP34 pins |
| | | | 6 - 10 |
|---------------------+-----------+--------------+-----------|
| External battery | JP31 | Turbo LED | JP34 pins |
| | | | 11 - 15 |
|---------------------+-----------+--------------+-----------|
| Auxiliary keyboard | JP33 | Turbo switch | JP34 pins |
| connector | | | 16 - 17 |
|---------------------+-----------+--------------+-----------|
| Power LED & keylock | JP34 pins | Reset switch | JP34 pins |
| | 1 - 5 | | 19 - 20 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | JP3 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP3 | Closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP20 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Internal battery enabled | JP32 | Closed |
|---+----------------------------------+--------+------------|
| | Internal battery disabled | JP32 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP41 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TG1 | TG2 |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 8K x 8 | (1) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80386DX-40) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80386DX-40 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+--------+-------+------+------+------+------|
| 64KB | 1 & 2 | 1 & 2, | 2 & 3 | 2 & | 2 & | 2 & | 2 & |
| | | 7 & 8 | | 3 | 3 | 3 | 3 |
|-------+-------+--------+-------+------+------+------+------|
| 128KB | 1 & 2 | 1 & 2, | 2 & 3 | 2 & | 2 & | 2 & | 2 & |
| | | 7 & 8 | | 3 | 3 | 3 | 3 |
|-------+-------+--------+-------+------+------+------+------|
| 256KB | 1 & 2 | 1 & 2, | 2 & 3 | 2 & | 2 & | 2 & | 2 & |
| | | 7 & 8 | | 3 | 3 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80386DX-40 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 1 & |
| | | | | | | 3 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 1 & |
| | | | | | | 3 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 1 & |
| | | | | | | 3 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CX486DLC-33) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CX486DLC-33 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+--------+-------+------+------+------+------|
| 64KB | 1 & 2 | 1 & 2, | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | | 5 & 6 | | 2 | 3 | 3 | 3 |
|-------+-------+--------+-------+------+------+------+------|
| 128KB | 1 & 2 | 1 & 2, | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | | 5 & 6 | | 2 | 3 | 3 | 3 |
|-------+-------+--------+-------+------+------+------+------|
| 256KB | 1 & 2 | 1 & 2, | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | | 5 & 6 | | 2 | 3 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CX486DLC-33 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 2 & |
| | | | | | | 2 | 3 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 2 & |
| | | | | | | 2 | 3 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 2 & |
| | | | | | | 2 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-20) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 |JP13 |JP30 |
|------+------+------+------+------+------+------+-----+-----|
| 64KB |2 & 3 |1 & 2 |1 & 2 |2 & 3 |1 & 2 |2 & 3 |2 & 3|2 & 3|
|------+------+------+------+------+------+------+-----+-----|
|128KB |1 & 2 |2 & 3 |2 & 3 |1 & 2 |1 & 2 |2 & 3 |2 & 3|2 & 3|
|------+------+------+------+------+------+------+-----+-----|
|256KB |2 & 3 |1 & 2 |1 & 2 |1 & 2 |2 & 3 |2 & 3 |2 & 3|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-20 CON’T) |
|------------------------------------------------------------|
| Size | JP40 | W1A | W1B | W1C | W2A |
|-------+--------------------+-------+-------+-------+-------|
| 64KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|-------+--------------------+-------+-------+-------+-------|
| 128KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|-------+--------------------+-------+-------+-------+-------|
| 256KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-20 CON’T) |
|------------------------------------------------------------|
| Size | W2C | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+------+------+------+------+------+------+-----+----|
| 64KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|-------+------+------+------+------+------+------+-----+----|
| 128KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|-------+------+------+------+------+------+------+-----+----|
| 256KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-25) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 2 & | 2 & |
| | | | | | 2 | 3 | 3 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 2 & | 2 & |
| | | | | | 2 | 3 | 3 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 2 & | 2 & |
| | | | | | 3 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-25 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486SX-25 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80487SX-20) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 |JP13 |JP30 |
|------+------+------+------+------+------+------+-----+-----|
| 64KB |2 & 3 |1 & 2 |1 & 2 |2 & 3 |1 & 2 |1 & 2 |1 & 2|2 & 3|
|------+------+------+------+------+------+------+-----+-----|
|128KB |1 & 2 |2 & 3 |2 & 3 |1 & 2 |1 & 2 |1 & 2 |1 & 2|2 & 3|
|------+------+------+------+------+------+------+-----+-----|
|256KB |2 & 3 |1 & 2 |1 & 2 |1 & 2 |2 & 3 |1 & 2 |1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80487SX-20 CON’T) |
|------------------------------------------------------------|
| Size | JP40 | W1A | W1B | W1C | W2A |
|-------+--------------------+-------+-------+-------+-------|
| 64KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|-------+--------------------+-------+-------+-------+-------|
| 128KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|-------+--------------------+-------+-------+-------+-------|
| 256KB | 1 & 2, 3 & 4, 5 & | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 6, 7 & 8 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80487SX-20 CON’T) |
|------------------------------------------------------------|
| Size | W2C | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+------+------+------+------+------+------+-----+----|
| 64KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|-------+------+------+------+------+------+------+-----+----|
| 128KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|-------+------+------+------+------+------+------+-----+----|
| 256KB | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | 1 & | 1 |
| | 2 | 2 | 2 | 2 | 2 | 3 | 2 | & |
| | | | | | | | | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-33) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-33 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-33 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-50) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-50 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+------+-------+-------+-------+------+------|
| 64KB | 1 & 2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+------+-------+-------+-------+------+------|
| 128KB | 1 & 2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+------+-------+-------+-------+------+------|
| 256KB | 1 & 2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX-50 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-50) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-50 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+--------+-------+------+------+------+------|
| 64KB | 1 & 2 | 5 & 6, | 1 & 2 | 1 & | 1 & | 1 & | 1 & |
| | | 7 & 8 | | 2 | 2 | 2 | 2 |
|-------+-------+--------+-------+------+------+------+------|
| 128KB | 1 & 2 | 5 & 6, | 1 & 2 | 1 & | 1 & | 1 & | 1 & |
| | | 7 & 8 | | 2 | 2 | 2 | 2 |
|-------+-------+--------+-------+------+------+------+------|
| 256KB | 1 & 2 | 5 & 6, | 1 & 2 | 1 & | 1 & | 1 & | 1 & |
| | | 7 & 8 | | 2 | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-50 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-66) |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C | JP8E | JP8F | JP12 | JP13 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | 1 & | 1 & |
| | | | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-66 CON’T) |
|------------------------------------------------------------|
| Size | JP30 | JP40 | W1A | W1B | W1C | W2A | W2C |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 1 & 2 | 5 & 6 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (80486DX2-66 CON’T) |
|------------------------------------------------------------|
| Size | W2D | W2E | W2G | W2H | W3A | W3B | W4 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|-------+-------+-------+-------+-------+-------+------+-----|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & | 1 & |
| | | | | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+