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# GEMLIGHT COMPUTER, LTD.
GMB-486SG (VER. 6.02)
Processor CX486S/UMCU5/80486SX/SL80486SX/CX486DX/80486DX/
SL80486DX/CX486DX2/AM486DX2/(SL)AM486DX2/80486DX2/
SL80486DX2/AM486DX4/(SL)AM486DX4/80486DX4/P24D/P24T
Processor 20/25/33/40/50(internal)/50/60/66(internal)/75(internal)/
Speed 80(internal)/100(internal)MHz
Chip Set Unidentified
Video Chip None
Set
Maximum 128MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS Award
Dimensions 250mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J1 | Reset switch | J6 |
|-------------------+----------+------------------+----------|
| Green PC | J2 | Power LED & | J7 |
| connector | | keylock | |
|-------------------+----------+------------------+----------|
| Turbo switch | J3 | Green PC | JP26 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Turbo LED | J4 | Green PC LED | JP27 |
|-------------------+----------+------------------+----------|
| Speaker | J5 | 32-bit VESA | SL1 – |
| | | local bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | Turbo enabled | J3 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Turbo disabled | J3 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | CMOS memory normal operation | JP16 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP16 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Monitor type select | JP17 | Open |
| | monochrome/VGA/EGA | | |
|---+-----------------------------------+-------+------------|
| | Monitor type select EGA | JP17 | Closed |
|---+-----------------------------------+-------+------------|
| » | CLKIN delay for CPUCLK | JP20 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CLKIN & CPUCLK same phase | JP20 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+------------+----------|
| 1MB | (1) 256K x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 256K x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 512K x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 512K x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 2M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 10MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 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 |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 17MB | (1) 256K x 36 | (1) 4M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 18MB | (1) 256K x | (1) 256K x | (1) 4M x | None |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 512K x | (1) 512K x | (1) 4M x | None |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 2M x | (1) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 4M x |
| | | 36 | 36 | 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 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | None |
| | | 36 | 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 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 16M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | None |
| | | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+-------------+-----------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 |
|------------+---------------+-------------+-----------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 16K/32K x 8 |
|------------+---------------+-------------+-----------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 16K/32K x 8 |
|------------+---------------+-------------+-----------------|
| 512KB | (4) 128K x 8 | None | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP3 | JP33 |
|-----------+------------+----------------------+------------|
| 128KB | Pins 1 & 2 | Pins 1 & 2, 3 & 4 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+------------+----------------------+------------|
| 256KB (A) | Pins 2 & 3 | Pins 2 & 3, 4 & 5 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+------------+----------------------+------------|
| 256KB (B) | Pins 1 & 2 | Pins 1 & 2, 3 & 4 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+------------+----------------------+------------|
| 512KB | Pins 1 & 2 | Pins 1 & 2, 3 & 4 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TAG JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Cache | TAG | JP2 | JP4 |
|-------------+-------------+-------------------+------------|
| 128KB | (1) 8K x 8 | Pins 1 & 2 closed | Pins 1 & 2 |
| | | | closed |
|-------------+-------------+-------------------+------------|
| 256KB (A,B) | (1) 16K x 8 | Pins 3 & 4 closed | Open |
|-------------+-------------+-------------------+------------|
| 256KB (A,B) | (1) 32K x 8 | Pins 2 & 3 closed | Pins 1 & 2 |
| | | | closed |
|-------------+-------------+-------------------+------------|
| 512KB | (1) 32K x 8 | Pins 2 & 3 closed | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AV9107-03) |
|------------------------------------------------------------|
| Speed | JP5 | JP6 | JP7 |
|---------------+--------------+--------------+--------------|
| 20MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 66iMHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 80iMHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 100iMHz | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (MS-8315) |
|------------------------------------------------------------|
| Speed | JP5 | JP6 | JP7 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 80iMHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP8 | JP10 | JP11 | JP12 | JP13 |
|-----------------+--------+-------+--------+--------+-------|
| CX486S | 2 & 3 | 2 & 3 | Open | 2 & 3, | Open |
| | | | | 4 & 5 | |
|-----------------+--------+-------+--------+--------+-------|
| UMC U5 | 1 & 2, | 2 & 3 | 1 & 2, | Open | Open |
| | 3 & 4 | | 3 & 4 | | |
|-----------------+--------+-------+--------+--------+-------|
| 80486SX | 2 & 3 | 2 & 3 | Open | 3 & 4 | 1 & 2 |
|-----------------+--------+-------+--------+--------+-------|
| SL80486SX | 2 & 3 | 2 & 3 | Open | 3 & 4 | 1 & 2 |
|-----------------+--------+-------+--------+--------+-------|
| CX486DX | 1 & 2, | 2 & 3 | 3 & 4 | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| 80486DX | 1 & 2, | 2 & 3 | 3 & 4 | 3 & 4 | 1 & 2 |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| SL80486DX | 1 & 2, | 2 & 3 | 3 & 4 | 3 & 4 | 1 & 2 |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| CX486DX2 | 1 & 2, | 2 & 3 | 3 & 4 | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| CX486DX2 (3.6v) | 1 & 2, | 2 & 3 | 3 & 4 | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| CX486DX2 (4v) | 1 & 2, | 2 & 3 | 3 & 4 | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| AM486DX2 | 1 & 2, | 2 & 3 | 3 & 4 | Open | Open |
| (3.45v) | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| (SL)AM486DX2 | 1 & 2, | 2 & 3 | 3 & 4 | 1 & 2, | 2 & 3 |
| (3.45v) | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+-------+--------+--------+-------|
| 80486DX2 | 1 & 2, | 2 & 3 | 3 & 4 | 3 & 4 | 1 & 2 |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| SL80486DX2 | 1 & 2, | 2 & 3 | 3 & 4 | 3 & 4 | 1 & 2 |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| AM486DX4 | 1 & 2, | 2 & 3 | 3 & 4 | Open | Open |
| (3.45v) | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| (SL)AM486DX4 | 1 & 2, | 2 & 3 | 3 & 4 | 1 & 2, | 2 & 3 |
| (3.45v) | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+-------+--------+--------+-------|
| 80486DX4 | 1 & 2, | 2 & 3 | 3 & 4 | 3 & 4 | 1 & 2 |
| | 3 & 4 | | | | |
|-----------------+--------+-------+--------+--------+-------|
| P24D | 1 & 2, | 1 & 2 | 3 & 4 | 1 & 2, | 2 & 3 |
| | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+-------+--------+--------+-------|
| P24T | 1 & 2, | 1 & 2 | 2 & 3 | 3 & 4 | Open |
| | 3 & 4 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP14 | JP15 | JP21 | JP22 | JP24 | JP25 |
|---------------+-------+------+-------+-------+------+------|
| CX486S | 1 & | 2 & | 1 & 2 | 2 & 3 | 2 & | 2 & |
| | 2, 3 | 3 | | | 3 | 3 |
| | & 4 | | | | | |
|---------------+-------+------+-------+-------+------+------|
| UMC U5 | Open | Open | 1 & 2 | 2 & 3 | 3 & | Open |
| | | | | | 4 | |
|---------------+-------+------+-------+-------+------+------|
| 80486SX | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| SL80486SX | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| CX486DX | 1 & 2 | 2 & | 1 & 2 | 2 & 3 | 2 & | 2 & |
| | | 3 | | | 3 | 3 |
|---------------+-------+------+-------+-------+------+------|
| 80486DX | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| SL80486DX | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| CX486DX2 | 1 & 2 | 2 & | 1 & 2 | 2 & 3 | 2 & | 2 & |
| | | 3 | | | 3 | 3 |
|---------------+-------+------+-------+-------+------+------|
| CX486DX2 | 1 & 2 | 2 & | 1 & 2 | 2 & 3 | 2 & | 2 & |
| (3.6v) | | 3 | | | 3 | 3 |
|---------------+-------+------+-------+-------+------+------|
| CX486DX2 (4v) | 1 & 2 | 2 & | 1 & 2 | 2 & 3 | 2 & | 2 & |
| | | 3 | | | 3 | 3 |
|---------------+-------+------+-------+-------+------+------|
| AM486DX2 | Open | Open | 2 & 3 | 1 & 2 | Open | Open |
| (3.45v) | | | | | | |
|---------------+-------+------+-------+-------+------+------|
| (SL)AM486DX2 | 2 & 3 | 4 & | 1 & 2 | 1 & 2 | 5 & | Open |
| (3.45v) | | 5 | | | 6 | |
|---------------+-------+------+-------+-------+------+------|
| 80486DX2 | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| SL80486DX2 | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| AM486DX4 | Open | Open | 2 & 3 | 1 & 2 | Open | Open |
| (3.45v) | | | | | | |
|---------------+-------+------+-------+-------+------+------|
| (SL)AM486DX4 | 2 & 3 | 4 & | 1 & 2 | 1 & 2 | Open | Open |
| (3.45v) | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| 80486DX4 | 2 & 3 | 4 & | 2 & 3 | 1 & 2 | Open | Open |
| | | 5 | | | | |
|---------------+-------+------+-------+-------+------+------|
| P24D | 2 & 3 | 4 & | 1 & 2 | 1 & 2 | Open | 1 & |
| | | 5 | | | | 2 |
|---------------+-------+------+-------+-------+------+------|
| P24T | 2 & 3 | 1 & | 1 & 2 | 1 & 2 | 1 & | 1 & |
| | | 2 | | | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP30 | JP31 | JP34 | JP35 | JP36 | JP38 |
|--------------+-------+-------+------+--------+------+------|
| CX486S | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| UMC U5 | Open | Open | 2 & | Closed | Open | Open |
| | | | 3 | | | |
|--------------+-------+-------+------+--------+------+------|
| 80486SX | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| SL80486SX | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| CX486DX | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| 80486DX | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| SL80486DX | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| CX486DX2 | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| CX486DX2 | Open | Open | 1 & | Open | Open | 1 & |
| (3.6v) | | | 2 | | | 2 |
|--------------+-------+-------+------+--------+------+------|
| CX486DX2 | Open | Open | 1 & | Open | Open | 2 & |
| (4v) | | | 2 | | | 3 |
|--------------+-------+-------+------+--------+------+------|
| AM486DX2 | 2 & 3 | Open | Open | Open | 2 & | Open |
| (3.45v) | | | | | 3 | |
|--------------+-------+-------+------+--------+------+------|
| (SL)AM486DX2 | 1 & 2 | 1 & 2 | 1 & | Open | 2 & | Open |
| (3.45v) | | | 2 | | 3 | |
|--------------+-------+-------+------+--------+------+------|
| 80486DX2 | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| SL80486DX2 | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| AM486DX4 | Open | Open | Open | Open | 2 & | Open |
| (3.45v) | | | | | 3 | |
|--------------+-------+-------+------+--------+------+------|
| (SL)AM486DX4 | 1 & 2 | 1 & 2 | 1 & | Open | 2 & | Open |
| (3.45v) | | | 2 | | 3 | |
|--------------+-------+-------+------+--------+------+------|
| 80486DX4 | Open | Open | 1 & | Open | 1 & | Open |
| | | | 2 | | 2 | |
|--------------+-------+-------+------+--------+------+------|
| P24D | 1 & 2 | 1 & 2 | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|--------------+-------+-------+------+--------+------+------|
| P24T | Open | Open | 1 & | Closed | Open | Open |
| | | | 2 | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP28 |
|----------------------------+-------------------------------|
| | 0 | Pins 1 & 2 closed |
|----+-----------------------+-------------------------------|
| » | 1 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP29 |
|----------------------------+-------------------------------|
| | <= 33MHz | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| » | >33 MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH BIOS SELECTION |
|------------------------------------------------------------|
| Setting | JP37 |
|----------------------------+-------------------------------|
| » | EPROM | Open |
|---+------------------------+-------------------------------|
| | 5v flash | Pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| | 12v flash | Pins 1 & 2 closed |
+------------------------------------------------------------+