img0047.txt

                                                                       ©
FILE:  -3an2:€0S_TF        HEWLETT-PACKARD:   A_uOSOO   (c) Coleco  {-_-s Jnfidential                 Sat.  8 Sep  1984, 2238       t       43

LOCATION OBJECT CODE  LINE      SOURCE  LINE

                      1631
                      1632  .  Name::            GET_VRAM
                      1633
                      1634     Function:         Gets a block of data  from VRAM and  stores it  intoa user buffer.
                      1635                       The following table  codes are used  to  itdentifwhich VRAM table
                      1636                       is being referenced:
                      1637
                      1638                         O - SPRITE ATTRIBUTE  TABLE  (SAT).
                      1639                         1 - SPRITE GENERATOR  TABLE  (SGT)
                      1640                         2 - PATTERN NAME TABLE       (PNT)
                      1641                         3 - PATTERN GENERATOR  TABLE (PGT)
                      1642                         4 - PATTERN COLOR  TABEL     (PCT)
                      1643
                      1644     Entry:            A - table code (see  above)
                      1645                       DE - starting index  into the table
                      1646                       HL - address of user  buffer
                      1647                       IY - block size (or byte  count)
                      1648
                      1649     Exit:             None.
                      1650
                      1651     Registers  used:  AF, DE, HL, IY
                      1652
                      1653     Routines  used:   SETCOUNT
                      1654
                      1655     Size:             ROM - O bytes
                      1656                       RAM - O bytes
                      1657
                      1658     Comments:         This version of GET VRAM  is provided  for stand alone operation.
                      1659
                      1660     Comparision:      left out pascal entry  point
                      1661                       code compacted
                      1662                       edited for documentation
                      1663
    EOCF              1664  _GET_VRAM:
    EOCF CDEODS       1665                   CALL    SETCOUNT                 ;setup  the actual byte count and the  absolute VRAM  address
                      1666                   CALL    READ_VRAM                ;user buffer  = VRAM data
                      1667                   RET
    EOD2 C3FDO1D      1668                   JP      READ_VRAM

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