Address Name Description
DFF038 STREQU Strobe for horiz sync with VB (vert blank) and EQU
DFF03A STRVBL Strobe for horiz sync with VB
DFF03C STRHOR Strobe for horiz sync
DFF03E STRLONG Strobe for identification of long horiz line (228CC)


One of the first 3 strobe addresses above, it is placed on the RGA
bus during the first refresh time slot of every other line, to
identify lines with long counts (228- NTSC, HTOTAL+2- VARBEAMEN=1
hires chips only).There are 4 refresh time slots and any not used
for strobes will leave a null (1FE) address on the RGA bus.

This material is most likely derived from the official Amiga documentation and where applicable copyright remains with the original author.