Section Eight - The Terminal

The Terminal application provides communicating to another device over the RS232 serial line using the Digital VT52 standard protocol.

The Terminal can be entered from the Index APPLICATIONS menu, or by typing V.

The keys typed on the keyboard are sent to the serial port. Some control keys, accessible from the  allow to control output on the remote computer. On the other side, characters received on the serial port are displayed on the Z88 screen and control function allow control of the Z88 screen like layout.

Serial port settings

The serial port parameters have to match on both computers. They can be configured from the panel which is entered with S; see Panel options.

Menu

Pressing the  key displays all the commands as listed below:-

Control keys

The equivalent Cambridge Z88 commands and keys for the implementation of the VT52 control keys are shown in the following table, together with a list of the codes transmitted: 

Command	Symbol	Effect	Codes sent
	DEL	Rubout	127
	BS	Backspace	8
G	BEL	Ring terminal bell	7
H	BS	Backspace	8
I	HT	Horizontal tabulation	9
J	LF	Line feed	10
L	FF	Form feed, clear screen and home cursor	12
M	CR	Carriage return	13
N	SO	Shift out	14
O	SI	Shift in	15
Q	DC1 (XON)	Resume transmitting	17
S	DC3 (XOFF)	Stop transmitting	19
X	CAN	Cancel or abort escape sequence	24
Z	SUB	Same effect as CAN	26
	ESC	Escape sequence	27
		Cursor up	ESC A
		Cursor down	ESC B
		Cursor right	ESC C
		Cursor left	ESC D
	PF1	Function 1	ESC ? P
	PF2	Function 2	ESC ? Q
	PF3	Function 3	ESC ? R
	PF3	Function 4	ESC ? S
Additional Command
		Clear Z88 screen to start a new session

Exit

Press  to exit the terminal and return to the Index. From the Index, move the cursor over the Terminal Suspended Activity and use the KILL command. This is the preferred option.

VT52 Control Function Summary

If the following commands are sent to the Serial Port,

their effects are as follows :

Spooling files

Material received by the Terminal application can be spooled to a file :RAM.– /S.sgn automatically by typing +S before commencing the transfer. The file will be created in temporary RAM, and should be deleted after use.

Spooling can be disabled by typing -S.

Transmitting files

A convenient way of sending a file to a remote machine is to copy the file to the :COM device.

Enter the Terminal and establish contact with the remote machine in the usual way, and then type F to go into the Filer.

Select the file you wish to transmit and then choose Copy from the Filer menu (see Section Seven - Filer Reference, for details of how to select and copy files). A dialogue box will appear. Type in :COM as the destination and press . The file will then be transmitted.

Once the transmission is over the dialogue box will disappear leaving the Filer display on the screen. You may then press to return to the Terminal.