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Old 23 March 2015, 22:16   #1
mark_k
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Join Date: Aug 2004
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Posts: 3,175
A4000 IDE registers

How are the A4000 IDE controller registers mapped? NetBSD gayle.h mentions
#define GAYLE_IDE_BASE_A4000 0xDD2020
#define GAYLE_IDE_INTREQ_A4000 0x1000 /* with stride of 1 */

and the code I'm disassembling seems to read or write at $DD2020 plus
0, 8, 12, $1C, $1006, $100A, $100E.

So I guess the IDE registers are mapped as bytes every 4 bytes in Amiga address space. But what are the $1000+ offset registers for?
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