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DTR Data terminal ready
Notes
The Cambridge Z88 RS232 port is wired as Data Terminal Equipment
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CTS on the Cambridge Z88 must be high for the Cambridge Z88 to transmit, and DCD must be high for the Cambridge Z88 to receive. For simple RS232 use, connect pins 5 and 8 to pin 9, and connect pins 2 (TxD), 3 (RxD), and 7 (GND) to the other computer.
Import/Export protocol for Send & Batch Send/Receive functions
The Import/Export protocol is given here for programmers who want to interface the Cambridge Z88 to a computer by writing their own interface software.
Control sequences
| Sequence | Function |
|---|---|
| ESC N | Start of file name |
| ESC F | Start of file/end of file name |
| ESC E | End of file |
| ESC Z | End of file or end of list of files |
| ESC B x x | Where x x is two ASCII digits representing a hex byte. For example, the byte &A9 is transmitted with ESC B A 9. |
Note that all the characters after the ESC code must be in upper-case ASCII.
Transfer protocol
First file, and subsequent files:
ESC N filename ESC F data ESC E
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