Service manual

Service Manual
Internal register memory map
Address
Read
Write
3200000H
Control
Control
3200004H
Serial Rx Data
Serial Tx Data
3200008H
-
-
320000CH
-
-
3200010H
IRQ status A
-
3200014H
IRQ request A
IRQ clear
3200018H
IRQ mask A
IRQ mask A
320001CH
-
-
3200020H
IRO status B
-
3200024H
IRQ request B
-
3200028H
IRQ mask B
IRQ mask B
320002CH
-
-
3200030H
FIQ status
-
3200034H
FIQ request
-
3200038H
FIQ mask
FIQ mask
320003CH
-
-
3200040H
T0 count Low
T0 latch Low
3200044H
T0 count High
T0 latch High
3200048H
-
T0 go command
320004CH
-
T0 latch command
3200050H
T1 count Low
T1 latch Low
3200054H
T1 count High
T1 latch High
3200058H
-
T1 go command
320005CH
-
T1 latch command
3200060H
T2 count Low
T2 latch Low
3200064H
T2 count High
T2 latch High
3200068H
-
T2 go command
320006CH
-
T2 latch command
3200070H
T3 count Low
T3 latch Low
3200074H
T3 count High
T3 latch High
3200078H
-
T3 go command
320007CH
-
T3 latch command
Peripheral address
Cycle
type
Bk
Base
address
IC
Use
Fast
1
&3310000
1772
Floppy disc controller
Sync
2
&33A0000
6854
Econet controller'
Sync
3
&33B0000
6551
Serial line controller
Slow
4
&3240000
Podule 0
Expansion slot
Med
4
&32C0000
Podule 0
Expansion slot
Fast
4
&3340000
Podule 0
Expansion slot
Sync
4
&33C0000
Podule 0
Expansion slot
Slow
4
&3244000
Podule 1
Expansion slot
Med
4
&32C4000
Podule 1
Expansion slot
Fast
4
&3344000
Podule 1
Expansion slot
Sync
4
&33C4000
Podule 1
Expansion slot
Slow
4
&3248000
Podule 2
Expansion slot
Med
4
&32C8000
Podule 2
Expansion slot
Fast
4
&3348000
Podule 2
Expansion slot
Sync
4
&33C8000
Podule 2
Expansion slot
Slow
4
&324C000
Podule 3
Expansion slot
Med
4
&32CC000
Podule 3
Expansion slot
Fast
4
&334C000
Podule 3
Expansion slot
Sync
4
&33CC000
Podule 3
Expansion slot
Fast
5
&335000
LS374
Printer Data
Fast
5
&3350018
HC574
Latch B (See next
page for details)
Fast
5
&3350040
HC574
Latch A (See next
page for details)
Fast
5
&3350048
HC175
Latch C (See next
page for details)
Fast
6
&3360000
16L8
Podule interrupt
request register
Fast
6
&3360004
16L8
Podule interrupt
mask register
Slow
7
&3270000
Extended external
podule space
*if fitted
Part 1 - System description Issue 2, June 1991 1-5