Commodore Amiga A500 Technical Reference Manual page 216

DMA
Time Slot Allocation/Horizontal Line
NOTES
1 )
These operations only take slots if the associated operation is be-
ing performed
Note: Copper Data Move instructions require
4
slots.
Copper Wait instructions require
6
slots.
2)
This cycle
0
appears to exclude one of the memory refresh cycles.
This is not the case.
Actual system hardware demands certain specific values for data
fetch start and display start. Therefore this timing chart has been
"adjusted" to ,match those requirements.
U e m o r ~
R e I r e , h O l ¶ k O M *
l 2 B y t e r / c r a n n e l l
A u d l o D Y A