STREQU/STRVBL/STRHOR/STRLONG

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)

Overview

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.

Hardware

page revision: 0, last edited: 05 Feb 2011 10:52

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Amiga Development

Reverse engineering for the Commodore Amiga

Overview