1. MOUSE Computer
Module L6.10

2. Microcomputer of Oakland University’s School of Engineering
MOUSE Computer
Microcomputer of Oakland University’s School of Engineering

3. MOUSE Designed and built in 1979 Based on 6802 microprocessor
Hex keypad
Six 7-segment displays

4. 6800 Microprocessor Accumulator A Accumulator B Index Register X
Stack Pointer, SP
Program Counter, PC
Condition Code

5. MOUSE Commands 0. Examine Accumulator A 1. Examine Accumulator B
2. Examine Index Register, X
3. Examine Stack Pointer, SP
4. Examine Program Counter, PC
5. Examine Condition Code Register
6. Offset Calculation
7. Set Breakpoint

6. MOUSE Commands (cont.) 8. Continue program 9. Single step program
A. Automatic data entry
B. Back up one byte in memory
C. Change byte in memory
D. Do - execute program
E. Examine memory
F. Forward one byte in memory

7. MOUSE Keypad Decoding 4-to-16 Decoder PA0 PA1 PA2 PA3 CA2 CA1 7 4 1 56 9 8 A B C D
PA0 + V K W
PA1
PA2
PA3
CA1
CA2
4-to-16 Decoder

8. 7-Segment Display

9. 8 8 8 8 8 8 MOUSE 7-Segment Displays a b c d e f
PB0
PB1
PB2
PB3
PB4
PB5
PB6 8 8 8 8 8 8
7442 BCD/Decimal Decoder
PA[4..7]

10. 8 8 5 8 8 8 MOUSE 7-Segment Displays a b c d e f
PB0
PB1
PB2
PB3
PB4
PB5
PB6 1 1 1 1 1 8 8 5 8 8 8 1 1 1 1 1 1 2 3 4 5
PA[4..7]
7442 BCD/Decimal Decoder
0010

11. CSE171 a b c d e f g C
D S E
009A
009B
009C

12. Print Message 0030 CE 0097 LDX #$0097 0033 BD B84C JSR MOVMES
0036 BD B824 JSR SIXDS
FB BRA -5

13. MOUSE Layout Address Bus (16 lines) To outside world
PROM
2716
RAM
6810
MPU
6802
PIA
6821
To outside
world
Data Bus (8 lines)

14. MOUSE Memory Map Hex Address Device RAM1 (internal) 0000-007F
RAM FF
PROM B800-BFFF
PIA