Quote:
Originally Posted by rkauer
IDE is controlled by Gary in any Amiga with an on-board IDE...
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Actually in any Amiga 4000 the IDE controller is implemented using two PAL's. In Amiga 4000D they are U901 (decoder) and U902 (FSM).
Gary only decodes IDE controller memory range.
Long time ago I made a replacement for U902 with faster transfer mode (PIO2 or PIO3, I can't remember exactly). But the speed gain wasn't spectacular (a few of 100KB/s increase).