Carry Buffer
74HC574
ALU Latch
74HC574
ALU
32K EEPROM
Regs HI
74HC670
Regs LO
74HC670
Reg Selector
74HC574
RAM Pointer
74HC574
Data RAM
8K SRAM
X Reg
74HC193
LCD
Data Bus
PC Bits 7-4
74HC193
PC Bits 3-0
74HC193
Program ROM
32K EEPROM
PC Bits 14-12
74HC193
PC Bits 11-8
74HC193
ROM Latch
74HC574
Instruction
74HC574
Output Demux
74HC138
Keyboard Input
74HC244
Resistors
10K/100K
Input Demux
74HC138
Microcode Latch
74HC574
Microcode ROM
8K EEPROM
Microcode Count
74HC193
Q7
A8
D7-D0
DB7-DB0
Q3-Q0
A3-A0
D3-D0
DB3-DB0
D3-D0
Q3-Q0
A7-A4
D3-D0
DB7-DB4
D3-D0
IO7-IO0
D7-D0
Q7-Q0
DB7-DB0
Q3-Q2
RB-RA
Q1-Q0
RB-RA
D3-D0
DB3-DB0
D7-D0
DB7-DB0
Q7-Q0
A11-A4
Q7-Q0
D7-D0
IO7-IO0
DB7-DB0
Q3-Q0
A3-A0
A3-A0
DB3-DB0
Q3-Q0
A3-A0
Q3-Q0
A7-A4
Q3-Q0
A11-A8
Q2-Q0
A14-A12
D3-D0
DB7-DB4
D3-D0
DB3-DB0
IO7-IO0
D7-D0
D7-D0
Q7-Q0
DB7-DB0
Q2-Q0
A2-A0
Q7,Q6
Q1,Q0,
Q5-Q0
A14-A9
Q5-Q3
A2-A0
Q7-Q0
A11-A4
Y0
OE
Y1
OE
Y2
OE
Y3
OE
Q7-Q0
DB7-DB0
DB7-DB4
DB3-DB0
Y0
CLOCK
Y1
LOAD
Y2
LOAD
LOAD
LOAD
LOAD
Y3
LOAD
Y4
LOAD
Y5
LOAD
Y6
LOAD
Q0
CLOCK
CLOCK
CLOCK
CLOCK
Q1
OE
OE
OE
OE
Q2
LOAD
Q3
LOAD
Q4
E
Q5
LOAD
Q6
LOAD
Q7
LOAD
IO7-IO0
D7-D0
Q3-Q0
A3-A0