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# FIRST INTERNATIONAL COMPUTER, INC.
LEO 486-VIP
Processor 80486SX/80486SL/80487SX/CX486DX/80486DX/80486DX2
80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set VIA
Max. Onboard 96MB
DRAM
Cache 64/128/256KB
BIOS Award
Dimensions 219mm x 271mm
I/O Options 32-bit VESA local bus slots (2), 32-bit PCI slots
(3), PS/2 mouse port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| PS/2 mouse port | CN2 | Green status | J5 |
| | | LED | |
|--------------------+----------+-----------------+----------|
| 3.3V daughter | CN5 | 32-bit VESA | S1 |
| board (80486DX4 | | Local bus slot | |
| only) | | | |
|--------------------+----------+-----------------+----------|
| Turbo switch | CN6 | 32-bit VESA | S2 |
| | | Local bus slot | |
|--------------------+----------+-----------------+----------|
| Turbo LED | CN7 | 32-bit PCI slot | PCI1 |
|--------------------+----------+-----------------+----------|
| Reset switch | CN8 | 32-bit PCI slot | PCI2 |
|--------------------+----------+-----------------+----------|
| Speaker | CN9 | 32-bit PCI slot | PCI3 |
|--------------------+----------+-----------------+----------|
| Power LED & | CN10 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | J2 | Closed |
|----+---------------------------------+--------+------------|
| | Monitor type select | J2 | Open |
| | monochrome/EGA/VGA | | |
|----+---------------------------------+--------+------------|
| » | CMOS memory normal operation | J3 | Open |
|----+---------------------------------+--------+------------|
| | CMOS memory clear | J3 | Closed |
|----+---------------------------------+--------+------------|
| » | Normal operation | J7 | Open |
|----+---------------------------------+--------+------------|
| | Password clear | J7 | Closed |
|----+---------------------------------+--------+------------|
| » | CPU select Cyrix DX | JT1 | pins 1 & 2 |
| | | | closed |
|----+---------------------------------+--------+------------|
| | CPU select Cyrix DX2 | JT1 | pins 2 & 3 |
| | | | closed |
|----+---------------------------------+--------+------------|
| » | 80486DX4 3X mode | JT2 | pins 1 & 2 |
| | | | closed |
|----+---------------------------------+--------+------------|
| | 80486DX4 2X mode | JT2 | pins 2 & 3 |
| | | | closed |
|----+---------------------------------+--------+------------|
| » | Pentium Overdrive internal | JT3 | pins 1 & 2 |
| | write-back cache | | closed |
|----+---------------------------------+--------+------------|
| | Pentium Overdrive internal | JT3 | pins 2 & 3 |
| | write-through cache | | closed |
|----+---------------------------------+--------+------------|
| » | Pentium Overdrive disabled | JT4 | pins 1 & 2 |
| | | | closed |
|----+---------------------------------+--------+------------|
| | Pentium Overdrive enabled | JT4 | pins 2 & 3 |
| | | | closed |
|----+---------------------------------+--------+------------|
| » | Normal operation | JT5 | pins 1 & 2 |
| | | | closed |
|----+---------------------------------+--------+------------|
| | For card that uses A31 | JT5 | pins 2 & 3 |
| | | | closed |
|----+---------------------------------+--------+------------|
| » | Address area is proogrammed in | JT6 | pins 1 & 2 |
| | VT82C505 | | closed |
|----+---------------------------------+--------+------------|
| | Supports IRQ15 when SMI# is | JT6 | pins 2 & 3 |
| | used | | closed |
|----+---------------------------------+--------+------------|
| » | Factory configured - do not | JT7 | pins 1 & 2 |
| | alter | | closed |
|----+---------------------------------+--------+------------|
| » | Factory configured - do not | JT8 | pins 1 & 2 |
| | alter | | closed |
|----+---------------------------------+--------+------------|
| » | Factory configured - do not | JT9 | pins 1 & 2 |
| | alter | | closed |
|----+---------------------------------+--------+------------|
| » | Normal operation | JT10 | pins 2 & 3 |
| | | | closed |
|----+---------------------------------+--------+------------|
| | PCI IDE card is installed | JT10 | pins 1 & 2 |
| | | | closed |
|----+---------------------------------+--------+------------|
| » | Factory configured - do not | JT11 | pins 1 & 2 |
| | alter | | closed |
|----+---------------------------------+--------+------------|
| » | Factory configured - do not | JX2 | pins 2 & 3 |
| | alter | | closed |
|------------------------------------------------------------|
| NoteJumper JT5 and JT6 cannot be closed at the same time. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256K x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 1MB | NONE | (1) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 1MB | NONE | NONE | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 2MB | (4) 256K x 9 | (1) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 2MB | NONE | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 2MB | (4) 256K x 9 | NONE | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 3MB | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 5MB | (4) 256K x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 5MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 5MB | (4) 1M x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 5MB | NONE | (1) 256K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 5MB | NONE | (1) 1M x 36 | (1) 256K x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 6MB | (4) 256K x 9 | (1) 1M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (4) 256K x 9 | (1) 256K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (4) 256K x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 9MB | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 9MB | (4) 256K x 9 | (1) 256K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 9MB | (4) 256K x 9 | (1) 1M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 16MB | NONE | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 16MB | NONE | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 17MB | (4) 256K x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | NONE | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | NONE | (1) 4M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 17MB | (4) 4M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 17MB | (4) 4M x 9 | NONE | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 18MB | (4) 256K x 9 | (1) 256K x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 18MB | (4) 256K x 9 | (1) 4M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 18MB | (4) 4M x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (1) 256K x 36 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (4) 1M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 256K x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 256K x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 1M x 9 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 1M x 9 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 4M x 9 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 21MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 32MB | NONE | NONE | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 33MB | (4) 256K x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 33MB | (4) 4M x 9 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 33MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 4M x 9 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 16M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 65MB | (4) 16M x 9 | (1) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 65MB | (4) 16M x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 66MB | (4) 16M x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 68MB | (4) 16M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 68MB | (4) 16M x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 69MB | (4) 16M x 9 | (1) 256K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 69MB | (4) 16M x 9 | (1) 1M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 72MB | (4) 16M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 80MB | (4) 16M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 80MB | (4) 16M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 81MB | (4) 16M x 9 | (1) 256K x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 81MB | (4) 16M x 9 | (1) 16M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 84MB | (4) 16M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 84MB | (4) 16M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (4) 16M x 9 | (1) 4M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD CONFIGURATION |
|------------------------------------------------------------|
| Select | JRN4 | JRN5 | JRN6 | JRN7 |
|----------+------------+------------+-----------+-----------|
| Internal | Installed | Not | Installed | Not |
| | | installed | | installed |
|----------+------------+------------+-----------+-----------|
| External | Not | Installed | Not | Installed |
| | installed | | installed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (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 TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC2 | JC3 | JC4 | JP1 | JT12 | JX1 |
|------------+-------+-------+-------+-------+-------+-------|
| 80486SX | pins | pins | Open | pins | pins | pins |
| | 2 & 3 | 2 & 3 | | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| 80487SX | pins | pins | pins | pins | pins | pins |
| | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| CX486S | pins | pins | Open | pins | pins | pins |
| | 2 & 3 | 2 & 3 | | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+-------+-------+-------+-------+-------+-------|
| Intel SL | N/A | N/A | N/A | pins | pins | pins |
| enhanced | | | | 2 & 3 | 1 & 2 | 2 & 3 |
|------------+-------+-------+-------+-------+-------+-------|
| AM486DXL | N/A | N/A | N/A | pins | pins | pins |
| | | | | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX | pins | pins | pins | pins | pins | pins |
| | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| CX486DX | pins | pins | pins | pins | pins | pins |
| | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX2 | pins | pins | pins | pins | pins | pins |
| | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX4 | pins | pins | pins | pins | pins | pins |
| | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+-------+-------+-------+-------+-------+-------|
| Pentium | pins | pins | pins | pins | pins | pins |
| Overdrive | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Type | JN1 | JN2 | JRN1 | JRN2 | JRN3 |
|-------------+------+------+----------+----------+----------|
| 80486SX | Open | Open | N/A | N/A | N/A |
|-------------+------+------+----------+----------+----------|
| 80487SX | Open | Open | N/A | N/A | N/A |
|-------------+------+------+----------+----------+----------|
| CX486S | Open | Open | Not | Not |Installed |
| | | |installed |installed | |
|-------------+------+------+----------+----------+----------|
| Intel SL | Open | Open | Not |Installed | Not |
| enhanced | | |installed | |installed |
|-------------+------+------+----------+----------+----------|
| AM486DXL | Open | Open |Installed | Not | Not |
| | | | |installed |installed |
|-------------+------+------+----------+----------+----------|
| 80486DX | Open | Open | Not | Not | Not |
| | | |installed |installed |installed |
|-------------+------+------+----------+----------+----------|
| CX486DX | Open | Open | Not | Not |Installed |
| | | |installed |installed | |
|-------------+------+------+----------+----------+----------|
| 80486DX2 | Open | Open | Not | Not | Not |
| | | |installed |installed |installed |
|-------------+------+------+----------+----------+----------|
| 80486DX4 | Open | Open | Not |Installed | Not |
| | | |installed | |installed |
|-------------+------+------+----------+----------+----------|
| Pentium |Closed|Closed| Not |Installed | Not |
| Overdrive | | |installed | |installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JCK0 | JCK1 | JCK2 | JCK3 |
|--------+------------+------------+------------+------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JV1 | JV2 |
|------------+----------------+----------------+-------------|
| < 33MHz | 0 wait states | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|------------+----------------+----------------+-------------|
| > 33MHz | 1 wait state | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed |
+------------------------------------------------------------+