Commodore Plus 4 - RS-232 Interface; Opening The RS-232 Channel

SECTION 9
HI
■ ■■■■■
^S iiii
PLUS/4
Memory
Register
Map
REG
0
■
2
3
4
5
6
7
6
9
■
11
12
*
14
15
16
17
18
19
20
21
-
23
24
25
26
27
.:■
29
■
31
62
■
SFFOO
SFF01
SFF02
$FFQ3
SFFO.:
SFF05
SFF06
SFF07
$FF08
SFF09
SFFOA
SFFOB
SFFOC
IFFOD
IFFOE
JFFOF
$FF10
SFF11
SFF12
SFF13
SFF14
SFF15
SFF16
SFF17
.., ■..
SFF19
SFF1A
$FF1B
SFF1C
5FF1D
SFF1E
SFFlF
$FF3E
$FF3F
3KGD0
BKGD1
BKGD2
BKGD3
BKDG4
037
TEST
DB6
ECM
RVS OFF PAL'
IBQ
NC
RC7
NC
CUR7
sndv;
i t:«
EI-T3
RCf
NC
CUR6
'. i ■■
SND2-7 SND2-6
NC NC
SND-FiEL NOISE
NC
C35
VhM
NC
NC
NC
NC
NC
NC
BRE7
NC
VL7
■■-.
NC
NC
CB-:
.*.'■
LUM2
LUMZ
LUM2
LUM2
LUM2
NC
BRE6
NC
VL6
H7
BL3
!:■-:
TIMER #
TIMER *
DB3 DSi
1 RELOAD VALUE. BITS O-T(LOW)
1 RELOADVALUE.BITS815(HIGHI
ril/Efi * 2 RELOAD VALUE BITSO T.lOWi
TIMER*
2 RELOAD VALUE. BITS 8-15 (HIGH)
TIMER* 3 RELOAD VALUE. BITS 0-7 (L0W1
TIMER
* 3 RELOAD VALUE BUS 8-15 (HIGH)
■■■■.■■/
FREEZE
NC
■■.:
■.;
CUR5
SNDT-5
SND2-5
N
.. L_
■■■.■■■
2% ■
■:■
LLJM1
LUMl
Ml
Ml
NC
BRE5
NC
VL5
...
BL2
BLANK
MCM
#ROWS
#COLS
KEYBOARD LATCI-
I-T2
E1-T2
PC-
\c
CURJ
SND1-J
SND2-1
NC
Vi-SEL
BMB1
:b;
.■■
LUMO
.".■
LUMO
■■'."
BRE4
NC
H5
BLl
P0\
I-Ti
El-Tl
= "
■J
CUR3
SND1-3
SND2-3
NC
V0L3
BVBO
CB1
VMO
COLOR
■_ . i'
Ci L0=-
color;
color;
NC
BRE3
NC
VL.l
H-l
-
1 -El EC!
RAW SELECT
Y2
X2
I-LP
EI-LP
RC2
NC
CUR2
SND1 2
SND3-2
VC
. _
RBANK
CBO
NC
C0L0R2
C0L0R2
C0L0R2
COLOR2
C0L0R2
NC
BRE2
f.(
.
H3
VSUB2
XI
I-RAS
L ■■ ■ ■
C9
CURi
SN01-1
■■,.■■
SND2-S
V0L1
S1-9
":_: :-
NC
COLOGl
COLO"I
COL0R1
COLO-1
COLO=1
BRE9
BRE1
■,
VL1
-_
V3UB1
OBO
YO
xo
NC
= :.
CURB
CURO
SNDIO
SND2 0
SND3-8
VOLO
S"-B
S'A^US
NC
COLOOO
1 1
COLOR!)
COLORO
COLORO
BRE8
BREG
VLB
VLO
-
_
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