Rampage!                                            AST Part Number 202073-001

The Rampage is a memory enhancement board designed for use with the IBM PC,
XT, and 100% compatibles running at a speed of 4.77MHz.  The Rampage can be
populated from 256K to 2048K using industry standard 256K DRAM chips of at
least 150ns speed.  The memory standards supported by the Rampage include
conventional (640K base), LIM 3.2, EEMS, and LIM 4.0.  Extended memory can be
emulated by using the REX.SYS device driver.  In order to access any
non-coventional memory, the REMM.SYS device driver must be used.


SWITCH SETTINGS

    BASE I/O ADDRESS

               208  218  258  268  2A8  2B8  2E8
               ---  ---  ---  ---  ---  ---  ---
        SW1     ON   ON   ON   ON  OFF  OFF  OFF
        SW2     ON   ON  OFF  OFF   ON   ON  OFF
        SW3     ON   ON   ON  OFF  OFF  OFF  OFF
        SW4     ON  OFF  OFF   ON   ON  OFF   ON

    STARTING ADDRESS

                0K   256K  512K  640K
               ----  ----  ----  ----
        SW5    OFF    ON   OFF    ON
        SW6    OFF   OFF    ON    ON


    BANKS AVAILABLE AS BASE (640K) MEMORY

        BANK   0        1        2        3

                        UP TO    UP TO    UP TO
                0K      256K     512K     768K *
               -----    -----    -----    -----
        SW7     ON       OFF       ON      OFF
        SW8     ON        ON      OFF      OFF

        NOTE: The maximum amount of conventional memory in an IBM PC/XT is
              640K.  SW7 & SW8 define the amount of conventional memory
              available to the PC from the Rampage board.  In some cases, the
              total of existing PC memory and Rampage conventional memory may
              add up to more than 640K.  In this situation, conventional memory
              stops at 640K and the balance becomes available as expanded
              memory.


JUMPER SETTINGS

    The only user-configurable jumpers on the Rampage are the three pin jumper
    labeled "E1-E2-E3" and the two pin jumper at "E8-E9".  By attaching E1-E2,
    Dual Page Mode is disabled, allowing only one set of mapping registers for
    expanded memory.  Attaching E2-E3 enables Dual Page Mode, allowing two
    mapping registers.  AST recommends two mapping registers, as they are
    useful for multitasking purposes.

    Attaching E8-E9 enables parity checking.  It is strongly recommended that
    parity checking is always enabled.








SWITCH BANK AND JUMPER LOCATIONS

    ͻ
                                           +-------+                
                                           |       |          * E8 Ķ
                                           +-------+          * E9  
                                           SW1                      
                                                       ***          
                                                       EEE          
                                                       123          
                                                                    
                                                                    
                                                                   Ķ
    ͻ            ͼ 
                                                  ͼ      
                                                                      
