Physbase() returns the base address in memory of the PhysicalScreen buffer.

2 (0x02)

Physbase() is available in all TOS versions.

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

Physbase() returns the base address of the PhysicalScreen.

The physical base address is the memory area where the video chip 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.

PhysicalScreen, Logbase(), LogicalScreen