Agnus; Features/Pin Configurations - Commodore AMIGA Technical Manual

AMIGA 1000 COMPONENT LEVEL REPAIR
CUSTOM ANIMATION CHIP
— Agnus —
FEATURES:
• Bit Blitter — Uses Hardware to Move Display Data — Allows High Speed Animation —
Frees the CPU for other Concurrent Tasks
• Display Synchronized Coprocessor
• Controls 25 DMA Channels — Allows the Disk and Sound to Operate with Minimal CPU
intervention
D 8 - 1 4 8 - D 9
D7 — 2 4 7 — D 1 0
D6 — 3
4 6 — D 11
D5 — 4
4 5 — D 12
D 4 - 5
4 4 — D 13
D3 — 6 4 3 — D 1 4
D2 — 7
4 2 - D 1 5
D I ­ 8 41 - V S S
DO-
9 4 0 - H S Y
V C C - 10 3 9 — CSY
R E S - 11
3 8 - V S Y
I N T 3 - 12
8361
%
-F IR ©
D M A L — 13
- D R A 8
B L S - 14
3 5 - D R A 7
D B R - 15
3 4 - D R A 6
A R W - 16
3 3 - D R A 5
R G A 8 - 17 3 2 - D R A 4
R G A 7 - 18
31 - D R A 3
R G A 6 - 19 3 0 - D R A 2
R G A 5 - 2 0 2 9 -D R A 1
R G A 4 - 21 2 8 - D R A 0
R G A 3 - 2 2 2 7 - V S S
R G A 2 - 2 3
2 6 — CCKQ
R G A 1 - 2 4
2 5 — CCK
PIN DESIG NA TIO N
FUNCTION TYPE
1-9
DO-D8 Data Bus Lines 0-8 I/O
10 Vcc + 5VDC
I
11 / RES
System Reset I
12 /INT3 Interrupt Level 3
0
13 DMAL
DMA Request Line I
14 /BLS
Blitter Slowdown I
15 /DBR
Data Bus Request 0
16
/ARW Agnus Ram Write 0
17-24 RGA1-8 Register Address 1-8 I/O
25 CCK Color Clock I
26
CCKQ Color Clock Delay
I
27 Vss Ground
I
28-36 DRAO-8
Dynamic Ram Address 0-8 0
37 /LP
Light Pen Input I
38
/VSY Vertical Sync I/O
39
/CSY Composite Sync 0
40
/HSY Horizontal Sync I/O
41 Vss Ground
I
42-48 D9-D15 Data Bus Lines 9-15
I/O
1-6