Commodore 64 Handbook page 55

CIA 1 (IRQ) (6526)
$DC01
SDC02
$DC03
JDC04
SDC05
JDC06
$DC07
SDCOD
$DC0E
$DCOF
Paddle Sel |
A B __|
I n j u r e
Keyboard Row .Select (inverted)
Joystick (t
Right. Pelt__ Down__Up____
Joystick 1
Ftrc_ Right L e f t __Down Up
Keyboard Column Read
$FF - All Output
$00 - All Input
Timer A
Timer B
Tape
Input
Timer li
B
iterrupt
A
Timer
A Start
One
Shot
Out
Mode
Time
PB6 Out
One
Shot
Out
Mode
Time
PB7 Out
Timer
B Start
PRB
DORA
DDRB
TAL
TAH
TBL
TBH
ICR
CRA
CRB
CIA 2 (NMI) (6526)
SDDOO
$DD01
SDD02
$DD03
$DD04
SDD05
SDD06
$DD07
$DD0D
JDDOE
$DD0F
Serial
Clock Serial
Clock
ATN
RS-232 VIC II
VIC II
IN
IN
OUT OUT OUT OUT
addr 15 addr 14
DSR
CTS
DCD* HI* DTR RTS
RS-232
IN IN
IN IN OUT OUT IN
$3F - Serial
$00 - P U P. All Input
or
$06 - RS-232
— Timer A —
— Timer B —
'V 'V
RS-232
IN
Timer li
B
iterrupt
A
Timer
A Start
Timer
B Start
PRA
PRB
DDRA
DDRB
TAL
TAH
TBL
TBH
ICR
CRA
CRB
* Connected but not used by O S.
56320
56321
56322
56323
56324
56325
56326
56327
56333
56334
56335
56576
56577
56578
56579
56580
56581
56582
56583
56589
56590
56591
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