Commodore Amiga A500 Technical Reference Manual page 31
Hide thumbs
Also See for Amiga A500:
- Technical reference manual (283 pages) ,
- Hardware reference manual (380 pages) ,
- User manual (29 pages)
Table of Contents
Advertisement
(40/42)
7 6 5 4
(44/46)
7 6 5 4
(48/4A)
7 6 5 4
(4C/4E)
X
X
(50/52)
7
6
(54/56)
7
6
(58/5A)
7
6
(5C/5E)
7
6
(60/62)
7
6
(64/66)
7
6
(68/6A)
7
6
(6C/6E)
7
6
(70/72)
7
6
(74/76)
7
6
(78/7A)
7
6
(7C/7E)
7
6
Note: The actual reserved values will be FF rather than 00, because the system will invert them. See
the section on reading I/O locations for more information.
3 2
1
3 2
1 0
3 2
1 0
X
X
X
X
X
X
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
Optional control status register
0
Write
Interrupt enable
User definable
Local reset
User definable
User definable
User definable
User definable
User definable
Reserved
Write
Not defined
Base address register, write only
These bits are compared with A23 through A16
(or fewer) to determine the base address of this
board.
Optional "shut up" address, a write to this ad-
dress will cause the board to pass its config out
and then never again respond to any address.
RESET will re-enable the board. The actual ad-
dress that has this effect is 4C. A write to 4E is
ignored. This is write only.
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
0
Reserved, must be 00
28
Read
Interrupt enable
don't care
must be 0
don't care
INT2 pending
INT6 pending
INT7 pending
I am pulling INT
Read
must be 00
Hide quick links:
Advertisement
Table of Contents
