ADVANCED LOGIC RESEARCH, INC.
=============================

   EVOLUTION IV 4/33 ISA VERSION

   Processor    80486SX/80487SX/80486DX/80486DX2                  
   Processor    20/25/33/40/50(internal)/66(internal)MHz          
   Speed        
   Chip Set     Intel                                             
   Max. Onboard 52MB                                              
   DRAM         
   Cache        None                                              
   BIOS         Phoenix                                           
   Dimensions   356mm x 318mm                                     
   I/O Options  32-Bit VESA local bus slots (2), external cache   
                card slot, floppy drive interface, hard drive     
                interface, parallel port, PS/2 mouse port, serial 
                ports (2)                                         
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/A-B/31911-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location | Purpose            | Location |
   |-----------------+----------+--------------------+----------|
   | Parallel port   |   CN1    | Floppy drive       |   CN5    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 1   |   CN2    | Hard drive         |   CN6    |
   |                 |          | interface          |          |
   |-----------------+----------+--------------------+----------|
   | Serial port 2   |   CN3    | 32-bit VESA local  | S1 & S2  |
   |                 |          | bus slots          |          |
   |-----------------+----------+--------------------+----------|
   | PS/2 mouse port |   CN4    | External cache     |    S3    |
   |                 |          | card slot          |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0   |   Bank 1    |   Bank 2    |   Bank 3   |
   |------+------------+-------------+-------------+------------|
   | 4MB  | (8) 1M x 4 |    NONE     |    NONE     |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 8MB  | (8) 1M x 4 | (1) 1M x 36 |    NONE     |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 12MB | (8) 1M x 4 | (1) 1M x 36 | (1) 1M x 36 |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 16MB | (8) 1M x 4 | (1) 1M x 36 | (1) 1M x 36 |  (1) 1M x  |
   |      |            |             |             |     36     |
   |------+------------+-------------+-------------+------------|
   | 20MB | (8) 1M x 4 | (1) 4M x 36 |    NONE     |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 24MB | (8) 1M x 4 | (1) 1M x 36 | (1) 4M x 36 |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 36MB | (8) 1M x 4 | (1) 4M x 36 | (1) 4M x 36 |    NONE    |
   |------+------------+-------------+-------------+------------|
   | 40MB | (8) 1M x 4 | (1) 1M x 36 | (1) 4M x 36 |  (1) 4M x  |
   |      |            |             |             |     36     |
   |------+------------+-------------+-------------+------------|
   | 52MB | (8) 1M x 4 | (1) 4M x 36 | (1) 4M x 36 |  (1) 4M x  |
   |      |            |             |             |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Type        |        PS0         |        PS1        |
   |-------------------+--------------------+-------------------|
   |      80486SX      | pins 2 & 3 closed  | pins 1 & 2 closed |
   |-------------------+--------------------+-------------------|
   |      80487SX      | pins 2 & 3 closed  | pins 2 & 3 closed |
   |-------------------+--------------------+-------------------|
   |      80486DX      | pins 1 & 2 closed  | pins 2 & 3 closed |
   |-------------------+--------------------+-------------------|
   |     80486DX2      | pins 1 & 2 closed  | pins 2 & 3 closed |
   |-------------------+--------------------+-------------------|
   | No PGA installed  | pins 1 & 2 closed  | pins 1 & 2 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |      Speed       |        FS0         |        FS1         |
   |------------------+--------------------+--------------------|
   |      20MHz       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      25MHz       | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      33MHz       | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      40MHz       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      50iMHz      | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      66iMHz      | pins 1 & 2 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+