img0055.txt

                                                                         ’
FILE: «2 5a8S:E0S_TF         HEWLETT-PACKARD:    A_uOS OO   {(c)Coleco   tour Confidential                     Sat,  8  Sep  1984,  23  38       AGE       51

LOCATION  OBJECT   CODE  LINE       SOURCE  LINE

                          1919 ;
                          1920 ;    Switch_mem:  memory bank  switching  routine
                         1921  ;
                         1922  ;    Inputs:
                         1923 :;                 A = Appropriate   tnput from  SWITCH TABLE
                         1924
                         1925                    Example:
                         1926       Switch Table  Offset    Memory  configuration
                         {927      “eweaeeweweeeewveaeewreeweereerwrtenreweenwweenwrnawxenenWuewewweeaewvnweeeeenwweexe
                         1928
                         1929                -          Boot  ROM and  Alpha  Roms
                         1930                -          Intrinsic   RAM (OOOOH  thru  7FFFH)
                         1931                           Expansion   memory (OOOOH   thru 7FFFH)
                         1932                -          OS_7  and  Intrinsic  RAM (2000H   thru 7FFFH)
                         1933
                         1934
                         1935
                         1936
                         1937
                         1938
                         1939  ;   *¢+¢Note: The values in  the table  are subject   to change  in future
                         1940  ;             releases of ADAM  hardware.
                         1941  ;
                         1942  ;   For an example  of the use  of SWITCH MEM   see PORT COLLECTION    below.
                         1943  ;
                         1944  ;
                         1945  ;    Outputs:
                         1946                    CUR_BANK,  a defined  memory  location  will  contain
                         1947                    the updated  input  parameter  for  applications  and
                         1948                    EOS routines  which  need to  determine  which
                         1949                    memory space  is currently   active.
                         1950
    E165                 1951   SWITCH  MEM
    E185  47             1952            LO      B A                                 ;SAVE THE  PORT DATA   TO WRITE
    E186  3AFC27         1953            LD      A (MEMSWITCH  PORT]                 ;GET THE  PORT NUMBER
    E189  4F             1954            LD      CcA
    E18A  ED41           1955            OUT     (CJ»B                               ;SWITCH  MEMORY BANKS
    E18C  78             1956            LD      AB
    E18D  32FD6E         1957            LD      {CUR_BANK],A                        >REMEMBER  WHAT WAS   SWITCHED  TO.
    E190  C9             1956            RET

                                                               @e@#@e@eeeaeH=a1@e@eee eeee@0@ea