Signal pin No.	Signal Name	Signal	Beschreibung
1	GND	-	Signal Ground
2	TXD	Out	Transmitted data
3	RXD	In	Received data
4	RTS	Out	Request to send
5	CTS	In	Clear to send
6	DSR	In	Data set ready
7	DTR	Out	Data terminal ready
8	CD	In	Carrier detect
E	FG	-	Protective Ground

 Serial Interface (Floppydisk Port)

 

Signal pin No.	Signal Name	Signal	Beschreibung
1	GND	-	Signal Ground
2	PTX	Out	Transmitted data
3	PRX	In	Received data
4	POUT	In	Transmit mode
5	PIN	Out	Receive mode
E	FG	-	Protective ground

System-Bus

 

Pin	Symb	Bedeutung
1	VB	Stromversorgung von Batterie 1,0A unreg.
2	-NMI	Active LOW
3	V	(geschaltet) 50mA
4	+5V	(geschaltet)
5	DB7	Data Bit 7
6	DB6	"
7	DB5	"
8	DB4	"
9	DB3	"
10	DB2	"
11	DB1	"
12	DB0	Data Bit 0
13	-IOCS	Adresse 0000-007F I/O Chip select
14	VC	Power for RAM 40mA
15	AB0	Adress Bus
16	AB1	"
"	"	"
30	AB15	"
31	-Reset	CPU Reset , active low
32	-R/W	Memory read (low) write (high)
33	-Reset	RAM Protect bei Power off
34	E	von CPU Clock
35	ROM EN	low, disable ROM
36	-EXT INT	External interupt
37	GND	Ground
38	GND	Ground
39	CG	Case Ground
40	CG	Case Ground

Anschlussübersicht 

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