Agnus/ Read/ Denise/ Register Address Write Paula Function -------- ------- ----- ------- -------- STREQU 038 S D Strobe for horizontal sync with VB and EQU STRHOR 03C S D P Strobe for horizontal sync STRLONG 03E S D( E ) Strobe for identification of long horizontal line One of the first three strobe addresses above is placed on the destination address bus during the first refresh time slot. The fourth strobe shown above is used during the second refresh time slot of every other line to identify lines with long counts (228). There are four refresh time slots, and any not used for strobes will leave a null (FF) address on the destination address bus. STRVBL 03A S D Strobe for horizontal sync with VB (vertical blank)
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