Offset: $004 Access: read Chipset: OCS/ECS/AGA
Reads the vertical beam high bit, field flags, and Agnus identification.
Bitfields¶
Bit 15: LOF, long-field flag.
Bits 14-8: Chipset identification.
Bit 7: LOL, long-line flag.
Bit 0: Vertical position bit 8; VHPOSR supplies bits 7-0.