Address
Data
LCD
RAM
8K SRAM
Output Demux
74HC138
Keypad Input
74HC244
Inverters
74HC04
OR Gates
74HC32
PC Bits 1-0
74HC193
EEPROM
32K EEPROM
Reg Bits 15-12
74HC670
Reg Bits 11-8
74HC670
Reg Bits 7-4
74HC670
Reg Bits 3-0
74HC670
Reg Selector
74HC574
Input Demux
74HC138
Instruction
74HC574
Buffer
74HC574
D3-D0
DB7-DB4
Q3-Q0
AB15-AB12
D3-D0
DB3-DB0
Q3-Q0
AB11-AB8
D3-D0
DB7-DB4
Q3-Q0
AB7-AB4
D3-D0
DB3-DB0
Q3-Q0
AB3-AB0
IO7-IO0
DB7-DB0
Q1-Q0
RA1-RA0
Q3-Q2
RA1-RA0
Q5-Q4
RA1-RA0
RA1-RA7
D7-D0
DB7-DB0
Q7-Q6
W1-W0
W1-W0
W1-W0
W1-W0
D7-D0
DB7-DB0
Q2-Q0
A2-A0
Q4-Q3
A1-A0
Q5
OE
Y0
WE
WE
Y1
WE
WE
Y2
CLOCK
Y3
CLOCK
Y4
CLOCK
Y5
WE
D7-D0
DB7-DB0
Q7-Q0
IO7-IO0
DB7-DB0
A12-A0
AD12-AD0
Q2-Q1
A14-A13
Q0
1A
Q1
1B
Q0
2A
Q1
1A
A12-A0
AB12-AB0
IO7-IO0
DB7-DB0
Y0
OE
Y1
OE
Y2
OE
Y3
2A
Q7-Q0
DB7-DB0
1Y
2B
3Y
3A
2Y
3B
1Y
3A
1Y
CLOCK
2Y
CS2
3Y
OE