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       # ACHME COMPUTER, INC.
       
          MS-4144
       
       Processor  CX476S/SL80486SX/80486SX/CX486DX/SLAMD486DX/AM486DX/SL80486DX80486DX/AM486DX2/SL80486DX2/80486DX4 
       Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz                               
       Speed      
       Chip Set   SIS                                                                                               
       Max.       128MB                                                                                             
       Onboard    
       DRAM       
       Cache      128/256/512/1024KB                                                                                
       BIOS       AMI                                                                                               
       Dimensions 254mm x 218mm                                                                                     
       I/O        32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel    
       Options    port, serial ports (2)                                                                            
       NPU        None                                                                                              
       Options    
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location  | Purpose        |  Location  |
          |------------------+-----------+----------------+------------|
          | Serial port 1    |    CN1    | Turbo LED      | JFB1 pins  |
          |                  |           |                |  12 - 13   |
          |------------------+-----------+----------------+------------|
          | Serial port 2    |    CN2    | Turbo switch   | JFB1 pins  |
          |                  |           |                |  15 - 17   |
          |------------------+-----------+----------------+------------|
          | Parallel port    |    CN3    | Reset switch   | JFB1 pins  |
          |                  |           |                |  19 - 20   |
          |------------------+-----------+----------------+------------|
          | Floppy drive     |    CN4    | IDE interface  | JFB1 pins  |
          | interface        |           | LED            |  21 & 22   |
          |------------------+-----------+----------------+------------|
          | IDE interface    |    CN5    | Green PC LED   | JG1 pins 1 |
          | (secondary)      |           |                |    & 2     |
          |------------------+-----------+----------------+------------|
          | IDE interface    |    CN6    | Green PC       | JG1 pins 3 |
          | (primary)        |           | connector      |    & 4     |
          |------------------+-----------+----------------+------------|
          | External battery |   JBAT1   | Green PC       |    JG2     |
          |                  |           | connector      |            |
          |                  |           | (monitor)      |            |
          |------------------+-----------+----------------+------------|
          | Power LED &      | JFB1 pins | Chassis fan    |   JFAN1    |
          | keylock          |   1 - 5   | power          |            |
          |------------------+-----------+----------------+------------|
          | Speaker          | JFB1 pins | 32-bit PCI     | PC1 - PC3  |
          |                  |  6 - 10   | slots          |            |
          |------------------------------------------------------------|
          | Note: The location of JFAN1 is unidentified.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battery type select internal     | JBAT1  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select external     | JBAT1  |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JM1   |    N/A     |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JV1   |    N/A     |
          |   | alter                            |        |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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     |          |
          |------+---------------+-------------+------------+----------|
          | 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   |
          |------+---------------+-------------+------------+----------|
          | 17MB | (1) 256K x 36 | (1) 4M x 36 |    NONE    |   NONE   |
          |------+---------------+-------------+------------+----------|
          | 18MB | (1) 256K x 36 | (1) 256K x  |  (1) 4M x  |   NONE   |
          |      |               |     36      |     36     |          |
          |------+---------------+-------------+------------+----------|
          | 18MB | (1) 512K x 36 | (1) 4M x 36 |    NONE    |   NONE   |
          |------+---------------+-------------+------------+----------|
          | 20MB | (1) 512K x 36 | (1) 512K x  |  (1) 4M x  |   NONE   |
          |      |               |     36      |     36     |          |
          |------+---------------+-------------+------------+----------|
          | 20MB |  (1) 1M x 36  | (1) 4M x 36 |    NONE    |   NONE   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM CONFIGURATION (CON’T)                 |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
          |-------+-------------+------------+------------+------------|
          | 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     |            |
          |-------+-------------+------------+------------+------------|
          | 32MB  | (1) 2M 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    |
          |-------+-------------+------------+------------+------------|
          | 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     |            |
          |-------+-------------+------------+------------+------------|
          | 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     |            |            |
          |-------+-------------+------------+------------+------------|
          | 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     |            |
          |-------+-------------+------------+------------+------------|
          | 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 or (1) 16K or |
          |       |              |              |     (1) 32K x 8      |
          |-------+--------------+--------------+----------------------|
          | 256KB | (4) 32K x 8  | (4) 32K x 8  | (1) 16K or (1) 32K x |
          |       |              |              |          8           |
          |-------+--------------+--------------+----------------------|
          | 256KB | (4) 64K x 8  |     NONE     | (1) 16K or (1) 32K x |
          |       |              |              |          8           |
          |-------+--------------+--------------+----------------------|
          | 512KB | (4) 64K x 8  | (4) 64K x 8  |     (1) 32K x 8      |
          |-------+--------------+--------------+----------------------|
          | 512KB | (4) 128K x 8 |     NONE     |     (1) 32K x 8      |
          |-------+--------------+--------------+----------------------|
          |  1MB  | (4) 128K x 8 | (4) 128K x 8 |     (1) 64K x 8      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |    JS1     |    JS2     |    JS3     |     JS4     |
          |-------+------------+------------+------------+-------------|
          | 128KB | pins 1 & 2 | pins 1 & 2 |    Open    | pins 2 & 3  |
          |       |   closed   |   closed   |            |   closed    |
          |-------+------------+------------+------------+-------------|
          | 256KB | pins 2 & 3 | pins 1 & 2 |    Open    | pins 3 & 4  |
          |       |   closed   |   closed   |            |   closed    |
          |-------+------------+------------+------------+-------------|
          | 256KB | pins 2 & 3 | pins 1 & 2 |    Open    | pins 1 & 2, |
          |       |   closed   |   closed   |            |    3 & 4    |
          |       |            |            |            |   closed    |
          |-------+------------+------------+------------+-------------|
          | 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 3 & 4  |
          |       |   closed   |   closed   |   closed   |   closed    |
          |-------+------------+------------+------------+-------------|
          | 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2, |
          |       |   closed   |   closed   |   closed   |    3 & 4    |
          |       |            |            |            |   closed    |
          |-------+------------+------------+------------+-------------|
          |  1MB  | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 3 & 4  |
          |       |   closed   |   closed   |   closed   |   closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type    |       JC5       |      JC6      | JC7  | JC8  |
          |------------+-----------------+---------------+------+------|
          |   CX486S   | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          | SL80486SX  |   pins 4 & 5    |  pins 6 & 7   | Open | Open |
          |            |     closed      |    closed     |      |      |
          |------------+-----------------+---------------+------+------|
          |  80486SX   |   pins 4 & 5    |  pins 6 & 7   | Open | Open |
          |            |     closed      |    closed     |      |      |
          |------------+-----------------+---------------+------+------|
          |  CX486DX   | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |     SL     | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |  AMD486DX  |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  AM486DX   | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          | SL80486DX  | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  80486DX   | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  AM486DX2  | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          | SL80486DX2 | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  80486DX2  | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  80486DX2  | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |    (WB)    |    6 closed     |  & 7 closed   |      |      |
          |------------+-----------------+---------------+------+------|
          |  80486DX4  | pins 3 & 4, 5 & | pins 4 & 5, 6 | Open | Open |
          |            |    6 closed     |  & 7 closed   |      |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type    |    JC1    |    JC2    |    JC3    |    JC4    |
          |------------+-----------+-----------+-----------+-----------|
          |   CX486S   |    Not    | Installed |    Not    |    Not    |
          |            | installed |           | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          | SL80486SX  | Installed |    Not    |    Not    |    Not    |
          |            |           | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  80486SX   |    Not    |    Not    |    Not    |    Not    |
          |            | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  CX486DX   |    Not    | Installed |    Not    |    Not    |
          |            | installed |           | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |     SL     |    Not    |    Not    |    Not    |    Not    |
          |  AMD486DX  | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  AM486DX   |    Not    |    Not    |    Not    |    Not    |
          |            | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          | SL80486DX  | Installed |    Not    |    Not    |    Not    |
          |            |           | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  80486DX   |    Not    |    Not    |    Not    |    Not    |
          |            | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  AM486DX2  |    Not    |    Not    |    Not    |    Not    |
          |            | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          | SL80486DX2 | Installed |    Not    |    Not    |    Not    |
          |            |           | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  80486DX2  |    Not    |    Not    |    Not    |    Not    |
          |            | installed | installed | installed | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  80486DX2  | Installed |    Not    | Installed |    Not    |
          |    (WB)    |           | installed |           | installed |
          |------------+-----------+-----------+-----------+-----------|
          |  80486DX4  | Installed |    Not    |    Not    |    Not    |
          |            |           | installed | installed | installed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |          Speed          |               JK1                |
          |-------------------------+----------------------------------|
          |          25MHz          |        pins 7 & 8 closed         |
          |-------------------------+----------------------------------|
          |          33MHz          | pins 1 & 2, 3 & 4, 7 & 8 closed  |
          |-------------------------+----------------------------------|
          |          40MHz          |    pins 3 & 4, 9 & 10 closed     |
          |-------------------------+----------------------------------|
          |         50iMHz          |        pins 7 & 8 closed         |
          |-------------------------+----------------------------------|
          |          50MHz          | pins 1 & 2, 5 & 6, 9 & 10 closed |
          |-------------------------+----------------------------------|
          |         66iMHz          | pins 1 & 2, 3 & 4, 7 & 8 closed  |
          |-------------------------+----------------------------------|
          |         75iMHz          |        pins 7 & 8 closed         |
          |-------------------------+----------------------------------|
          |         100iMHz         | pins 1 & 2, 3 & 4, 7 & 8 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CPU VOLTAGE CONFIGURATION                  |
          |------------------------------------------------------------|
          |  Voltage   |                jcv3                |   jcv4   |
          |------------+------------------------------------+----------|
          |   3.45v    |  pins 1 & 2, 3 & 4, 5 & 6 closed   |   Open   |
          |------------+------------------------------------+----------|
          |    3.8v    |  pins 1 & 2, 3 & 4, 5 & 6 closed   |  Closed  |
          |------------+------------------------------------+----------|
          |     5v     | pins 7 & 8, 9 & 10, 11 & 12 closed |   Open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   DACK/DRQ CONFIGURATION                   |
          |------------------------------------------------------------|
          |          DACK/DRQ          |             JDRQ1             |
          |----------------------------+-------------------------------|
          |         DACK1/DRQ1         |   pins 1 & 2, 4 & 5 closed    |
          |----------------------------+-------------------------------|
          |         DACK3/DRQ3         |   pins 2 & 3, 5 & 6 closed    |
          +------------------------------------------------------------+