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