OP•Ø…
ASUM16
ASUM10
DPR In
DPR
DPR1, DPR2, DPR4, DPR8
DP0 – DP6
DPNE, DPGT, DP>6, DP<8
Q
CQ…
CA…, CB…, CS…
CX…
CY…
S23
X1, X2, X4, X8
X, X1, X2, X4, X8
Y4, Y8,
YP1
Y
DL1, DL2, DL4, DL8
DL1, DL2, DL4
K1, K2, K4, K8
K…
P0, R0+R1
KCLR, KP
P0
DISP
Q-bit
CZ…
Z
Z Register
(56 bits)
X Register
(60 bits)
Arithmetic
Control
14 Nixie Displays
Keyboard
43210987654321.
Y Register
(60 bits)
Decimal Point
Register
(4 bits)
(decoder)
Ø
Øp
ØB
x
bit timing
ØD
x
digit timing
Timing
OP
clock rate
selection
Display Latch
(4 bits)
VC C
logic supply
display supplies
V+26 V+70 V+180
Power Supply
P State Register
(2 bits)
R State Register
(2 bits)
Facit 1123 Calculator
Section: Block Diagram
Page: 3
Rendition: 2014 Mar 6
A flag
(1 bit)
C flag
(1 bit)
N flag
(1 bit)
M/D flag
(1 bit)
A
M
D
C
N
P0
P1
P2
P3
R0
R1
R2
R3
