Topic       : The ATARI Compendium
Author      : Scott Sanders / JAY Software
Version     : 1.25 (20/6/2003)
Subject     : Documentation
Nodes       : 1117
Index Size  : 32614
HCP-Version : 6
Compiled on : Atari
@charset    : UTF-8
@lang       : en
@default    : 
@help       : %About
@options    : +g -i -t4 +y +z
@width      : 100
View Ref-FileLogbase()
Physbase()                                                            XBIOS

Syntax

VOIDP Physbase( VOID )

Function      Physbase() returns the address of the physical base of
              screen memory.

Opcode        2 (0x02)

Availability  All TOS versions.

Binding       move.w   #$02,-(sp)
              trap     #14
              addq.l   #2,sp

Return Value  Physbase() returns the physical base address of the screen.

Comments      The physical base address is the memory area where the video
              shifter reads its data. The logical address is the memory
              area where the VDI draws. These are normally the same but
              are addressed individually to enable screen flipping.

See Also      Logbase()