Software concept

The hardware allows different software concepts

Keep all in the PC

The micro-controller acts just as an parallel to serial converter. The parallel signals of the MC14500 are converted into serial data. The serial data is exchanged with the PC. All the periphery memory, in and outputs are simulated in the PC. Since the MC14500 has just 14 signals, single bytes containing all necessary information can be exchanged.

Table 8.1. Write

D7 Reserved (write 0)
D6 X2
D5 RST
D4 Data In
D3 I3
D2 I2
D1 I1
D0 I0


Table 8.2. Read

D7 RR
D6 X1
D5 Write
D4 Data Out
D3 Flag 0
D2 Flag F
D1 RTN
D0 JMP



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