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# FIRST INTERNATIONAL COMPUTER, INC.
LEO 486-GAV
Processor 80486SL/80486DX/80486DX2/80486DX4/Pentium
Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set VIA
Max. Onboard 64MB
DRAM
Cache 64/128/256KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive
interface, IDE interface, parallel port, PS/2
mouse port, (2), serial ports (2), VGA feature
connector, VGA connector
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN2 | VGA connector | J5 |
| (6-pin DIN) | | | |
|-------------------+----------+------------------+----------|
| PS/2 mouse | CN4 | Turbo LED | J20 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN5 | Turbo switch | J21 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN6 | Reset switch | J22 |
|-------------------+----------+------------------+----------|
| Parallel port | CN8 | Speaker | J23 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN9 | Power LED & | J24 |
| interface | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface | CN10 | 3.3V daughter | J32 |
| | | board (80486DX4 | |
| | | only) | |
|-------------------+----------+------------------+----------|
| Video feature | CN11 | Green status LED | J35 |
| connector | | | |
|-------------------+----------+------------------+----------|
| External battery | J1 | Hardware sleep | J36 |
|-------------------+----------+------------------+----------|
| Green PC power | J3 | 32-bit VESA | S1 |
| | | Local bus slot | |
|-------------------+----------+------------------+----------|
| IDE interface LED | J4 | 32-bit VESA | S2 |
| | | Local bus slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | IDE connector pin 27 open | J2 | Open |
|---+----------------------------------+--------+------------|
| | IDE connector pin 27 linked to | J2 | Closed |
| | IOCHRDY signal | | |
|---+----------------------------------+--------+------------|
| » | IDE connector pin 28 open | J6 | Open |
|---+----------------------------------+--------+------------|
| | IDE connector pin 28 linked to | J6 | Closed |
| | BALE signal | | |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J11 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J25 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | 80486DX4 clock mode 2.5x | J31 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | 80486DX4 clock mode 2x | J31 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | 80486DX4 clock mode 3x | J31 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J33 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Pentium Overdrive write-back | JC8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Pentium Overdrive write-through | JC8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JH | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JX6 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Video upper physical address | JV5 | pins 1 & 2 |
| | decode input select SA (26..31) | | closed |
|---+----------------------------------+--------+------------|
| | Video upper physical address | JV5 | pins 2 & 3 |
| | decode input select SAUP (1..2) | | closed |
|---+----------------------------------+--------+------------|
| » | Video DAC local access enabled | JV6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Video DAC local access disabled | JV6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Video memory address select | JV11 | pins 1 & 2 |
| | 256KB | | closed |
|---+----------------------------------+--------+------------|
| | Video memory address select 64KB | JV11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Normal operation | JV12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Other IDE/VGA controller is | JV12 | pins 2 & 3 |
| | installed at S1 | | closed |
|---+----------------------------------+--------+------------|
| » | Normal operation | JV13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Other IDE/VGA controller is | JV13 | pins 2 & 3 |
| | installed at S2 | | closed |
|---+----------------------------------+--------+------------|
| » | CPU clock 1x | JX1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU clock 2x | JX1 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE CONFIGURATION |
|------------------------------------------------------------|
| IDE | Speed | J8 | J9 | J10 |
|----------+-------+---------------+------------+------------|
| Enabled | 0 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+-------+---------------+------------+------------|
| Enabled | 1 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+-------+---------------+------------+------------|
| Enabled | 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+-------+---------------+------------+------------|
| Disabled | N/A | N/A | N/A | pins 2 & 3 |
| | | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port | JG | JH |
|------------------+--------------------+--------------------|
| Input | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Output | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| Bi-directional | pins 2 & 3 closed | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Video | IRQ9 | JV3 | JV4 |
|--------------+----------+-----------------+----------------|
| » | Enabled | Disabled | pins 2 & 3 | pins 1 & 2 |
| | | | closed | closed |
|---+----------+----------+-----------------+----------------|
| | Disabled | Enabled | pins 1 & 2 | pins 2 & 3 |
| | | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (2) 512K x 4 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (2) 512K x 4 | (2) 512K x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MCLK SELECT |
|------------------------------------------------------------|
| MCLK | J18 | J19 |
|----------------------+------------------+------------------|
| » | 50MHz | Open | Open |
|---+------------------+------------------+------------------|
| | 52MHz | Open | Closed |
|---+------------------+------------------+------------------|
| | 45MHz | Closed | Closed |
|---+------------------+------------------+------------------|
| | 38MHz | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR REFRESH RATE |
|------------------------------------------------------------|
| Rate | JV7 | JV8 |
|------------------------+-----------------+-----------------|
| » | 43Hz interlaced | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed |
|---+--------------------+-----------------+-----------------|
| | 56Hz | pins 2 & 3 | pins 1 & 2 |
| | non-interlaced | closed | closed |
|---+--------------------+-----------------+-----------------|
| | 60Hz | pins 1 & 2 | pins 2 & 3 |
| | non-interlaced | closed | closed |
|---+--------------------+-----------------+-----------------|
| | 70/72Hz | pins 1 & 2 | pins 1 & 2 |
| | non-interlaced | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO INTERLEAVE TIMING |
|------------------------------------------------------------|
| Select | JV9 | JV10 |
|--------------------+-------------------+-------------------|
| » | 1 NanoSeconds | pins 1 & 2 closed | pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | 2 NanoSeconds | pins 1 & 2 closed | pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | 3 NanoSeconds | pins 2 & 3 closed | pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | 4 NanoSeconds | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 1MB | NONE | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 1MB | NONE | NONE | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | NONE | (1) 256K x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 2MB | NONE | NONE | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 3MB | NONE | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | NONE | (1) 256K x | (1) 256K x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | NONE | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | NONE | NONE | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | NONE | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | NONE | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | NONE | (1) 256K x | (1) 4M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | NONE | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 256K x | (1) 256K x | (1) 1M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | NONE | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | NONE | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 256K x | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | NONE | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | (1) 1M x 36 | NONE | (1) 1M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 256K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | NONE | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | NONE | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 256K x | (1) 256K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | NONE | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | NONE | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | NONE | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | NONE | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | NONE | (1) 256K x | (1) 4M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 256K x | (1) 256K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 256K x | (1) 4M x 36 | (1) 256K x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | NONE | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 256K x | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | NONE | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | NONE | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | NONE | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 256K x | (1) 1M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 256K x | (1) 4M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 1M x 36 | (1) 256K x | (1) 4M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 1M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 1M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | NONE | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 256K x | (1) 4M x 36 | (1) 1M x | (1) 1M 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) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 33MB | NONE | (1) 256K x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | NONE | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 256K x | (1) 256K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | NONE | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | NONE | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 256K x | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 1M x 36 | (1) 256K x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | NONE | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | NONE | (1) 8M x | NONE |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | NONE | (4) 32K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 |
|-------+-----------------+-----------------+----------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JK1 | JK2 | JK3 | JK4 |
|--------+------------+------------+------------+------------|
| 25MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 33MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 40MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 50iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 50MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 66iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 | JC6 |
|---------------+--------+--------+--------+--------+--------|
| 80486SX | pins 2 | pins 2 | Open | pins 1 | Open |
| | & 3 | & 3 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX486S | pins 2 | pins 2 | Open | pins 1 | Closed |
| | & 3 | & 3 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX486S+ | pins 1 | pins 1 | Open | pins 1 | Open |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX487S | pins 1 | pins 1 | Open | pins 1 | Open |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| AM486DXL | pins 1 | pins 1 | Open | pins 1 | Closed |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX486DX | pins 1 | pins 1 | Open | pins 1 | Open |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| 80486DX | pins 1 | pins 1 | Open | pins 1 | Closed |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| 80486DX2 | pins 1 | pins 1 | Open | pins 1 | Closed |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| 80486DX4 | pins 1 | pins 1 | Open | pins 1 | Closed |
| | & 2 | & 2 | | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| Pentium | pins 1 | pins 1 | Closed | pins 2 | Closed |
| Overdrive | & 2 | & 2 | | & 3 | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Type | JC5 | RN40 | RN41 | RN46 |
|------------+--------+------------+------------+------------|
| 80486SX | Open | Not | Not | Not |
| | | installed | installed | installed |
|------------+--------+------------+------------+------------|
| CX486S | Open | Installed | Not | Not |
| | | | installed | installed |
|------------+--------+------------+------------+------------|
| CX486S+ | Open | Installed | Not | Not |
| | | | installed | installed |
|------------+--------+------------+------------+------------|
| CX487S | Open | Installed | Not | Not |
| | | | installed | installed |
|------------+--------+------------+------------+------------|
| AM486DXL | Open | Not | Not | Installed |
| | | installed | installed | |
|------------+--------+------------+------------+------------|
| CX486DX | Open | Installed | Not | Not |
| | | | installed | installed |
|------------+--------+------------+------------+------------|
| 80486DX | Open | Not | Not | Not |
| | | installed | installed | installed |
|------------+--------+------------+------------+------------|
| 80486DX2 | Open | Not | Not | Not |
| | | installed | installed | installed |
|------------+--------+------------+------------+------------|
| 80486DX4 | Closed | Not | Installed | Not |
| | | installed | | installed |
|------------+--------+------------+------------+------------|
| Pentium | Closed | Not | Not | Not |
| Overdrive | | installed | installed | installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (MANUFACTURER) |
|------------------------------------------------------------|
| Type | J17 | J34 |
|------------------+--------------------+--------------------|
| Intel | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Cyrix | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE IRQ SELECTION |
|------------------------------------------------------------|
| Select | J13 | JX2 | JX5 |
|------------+-----------------+--------------+--------------|
| IRQ15 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|------------+-----------------+--------------+--------------|
| SMI | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|------------------------------------------------------------|
| Note:Jumper pins 1 & 2 of J13 if JX2 and JX5 are set at |
| SMI and you wish to use the IRQ15 function. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD CONFIGURATION |
|------------------------------------------------------------|
| Select | JX3 | JX4 | RN3 | RN6 | RN10 | RN11 |
|--------+-----+-----+---------+---------+---------+---------|
|External|pins |pins | Not |Installed| Not |Installed|
| |1 & 2|1 & 2|installed| |installed| |
|--------+-----+-----+---------+---------+---------+---------|
|Internal|pins |pins |Installed| Not |Installed| Not |
| |2 & 3|2 & 3| |installed| |installed|
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JV1 | JV2 |
|-----------+---------------+-------------------+------------|
| < 33MHz | 0 wait states | pins 2 & 3 closed | pins 2 & 3 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33MHz | 1 wait state | pins 1 & 2 closed | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PC87332 ECP DMA CHANNEL SELECT |
|------------------------------------------------------------|
| DREQ | DACK | JP1 | JP2 |
|----------+---------+-------------------+-------------------|
| 1 | 1 | pins 2 & 3 closed | pins 2 & 3 closed |
|----------+---------+-------------------+-------------------|
| 3 | 3 | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NSS87311/312 BASE I/O ADDRESS SELECT |
|------------------------------------------------------------|
| Index Address | Data Address | JF |
|--------------------+------------------+--------------------|
| 26Eh | 26Fh | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 398h | 399h | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NSS87332 BASE I/O ADDRESS SELECT |
|------------------------------------------------------------|
| Index Address | Data Address | JF | JG |
|---------------+--------------+----------------+------------|
| 2Eh | 2Fh | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|---------------+--------------+----------------+------------|
| 26Eh | 26Fh | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|---------------+--------------+----------------+------------|
| 15Ch | 15Dh | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed |
|---------------+--------------+----------------+------------|
| 398h | 399h | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed |
+------------------------------------------------------------+