Commodore Amiga A500 Technical Reference Manual page 233

/ROME = /AS*A23*A22*A21*A20*A19*OVR*PRW
+ /AS*A23*A22*A21*/A20*/A19*OVR*PRW
+ /AS*/A23*/A22*/A21*/A20*/A19*OVR*OVL*PRW
+ /AS*/A23*/A22*/A21*A20*A19*OVL*OVR*PRW
/CLKE = /AS*A23*A22*/A21*A20*A19*/A18*OVR
DESCRIPTION
THE CLOCK IS NOW TILED THROUGHOUT THE SPACE $D80000-DBFFFF. IF
MORE PRECISE SELECTION TO $D80000 $D8FFFF IS REALLY WEEDED, THEN
THIS MUST BE DONE EXTERNALLY USING THE /CS INPUT ON THE CLOCK CHIP.
DTACK FOR THE CLOCK IS HANDLED IN THE MYRAME EQUATION BECAUSE THE DTACK
EQUATION ALREADY HAS 7 OR TERMS! THIS MEANS THAT CLOCK ACESSES WILL BE
SYNCHRONIZED TO VIDEO CYCLES, BUT THIS SHOULD CREATE NO MAJOR PROBLEMS.
THE IMPLEMENTATION OF ROME/MYRAME MATCHES THE A1O00 - IT MIGHT BE
DESIRABLE TO HAVE THE ADDRESS RANGE IN MYRAME MATCH THE ROM SELECT
ADDRESS RANGE...
MYRAME OUTPUT IS NOT USED EXTERNALLY - ONLY INTERNAL USAGE!!!
; $FB0000-FFFFFF
; $E00000-E7FFFF
; $000000-07FFFF
; $180000-1FFFFF
; $D80000-DBFFFF
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