Portfolio-Parallel-Interface
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Port-adress $8078: Port A of 8255, normally set for OUTPUT 
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Data Bits 0 to 7    Pin 2 to 9

Port-adress $8079: Port B of 8255, normally set for OUTPUT 
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Bit 0  Strobe       Pin 1
Bit 1  Auto Feed    Pin 14
Bit 2  init         Pin 16
Bit 3  select in    Pin 17
Bit 4 to 7 not connected

Port-adress $807A: Port C of 8255, normally set for INPUT
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Bit 0  Paper out    Pin 12
Bit 1  Select       Pin 13
Bit 2  NC
Bit 3  Error        Pin 15
Bit 4  Busy         Pin 11
Bit 5  Ackn         Pin 10
Bit 6 to 7  NC