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1.1
date     89.03.15.15.36.26;  author pkern;  state Exp;
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1.1
log
@Initial revision
@
text
@The Cterm keyboard:
-------------------
To exit Cterm press <SHIFT>-BRK/PAUS.  With the PC/AT, use Ctrl-Break.

For DELETE (ascii 127) press <CTRL>-BACKSPACE.
For NO SCROLL (ie. Xon/Xoff toggling) use BRK/PAUS (TI only).

Top-row key clusters:
			VT100 clusters
+---------------+-------+-------+	+-------+-------+-------+-------+
|    SET UP     | BREAK | BACK  |	|   ^   |   |   |  <-   |  ->   |
|               |       | SPACE |	|   |   |   v   |       |       |
+---------------+-------+-------+	+-------+-------+-------+-------+
			TI Pro equivalents
+-------+-------+-------+-------+	+-------+-------+-------+-------+
|   F1  |   F2  |   F3  |   F4	|	|   F9  |  F10  |  F11  |  F12  |
+-------+-------+-------+-------+	+-------+-------+-------+-------+
			IBM PC/AT equivalents
+-------+-------+-------+-------+	+-------+-------+-------+-------+
|   F1  |   F2  |   F3  |   F4	|	|   F7  |   F8  |   F9  |  F10  |
+-------+-------+-------+-------+	+-------+-------+-------+-------+

The normal arrow keys are equivalent to F9-F12 (ie. hitting F9 will send
the same vt100 escape sequence as would be sent when the Up key is pressed).

F3 is the vt100 BREAK key:
--------------------------
	hitting				yields
	-------				------
	BREAK (F3)			ctrl-C
	Shift-BREAK (SHIFT-F3)		drop DTR and RTS for 250 millisecs
	Ctrl-BREAK (CTRL-F3)		send Answerback message to host
	
	(NB: BREAK (ie. F3) should not be confused with the BRK/PAUS
	     key on the TI Pro or with the Break key on the IBM PC/AT)


The Keypad:
	VT100 keypad				TI Pro equivalent

					    (top label = keypad key)
					 (ALT label = keypad emulation)
+-------+-------+-------+-------+	+-------+-------+-------+-------+
|  PF1  |  PF2  |  PF3  |  PF4  |	| =     | +     | SPAC  |  TAB  |
|       |       |       |       |	| alt-F1| alt-F2| alt-F3| alt-F4|
+-------+-------+-------+-------+	+-------+-------+-------+-------+
| 7     | 8     | 9     | -     |	| 7     | 8     | 9     | -     |
|       |       |       |       |	| alt-1 | alt-2 | alt-3 | alt-4 |
+-------+-------+-------+-------+	+-------+-------+-------+-------+
| 4     | 5     | 6     | ,     |	| 4     | 5     | 6     | ,     |
|       |       |       |       |	| alt-Q | alt-W | alt-E | alt-R |
+-------+-------+-------+-------+	+-------+-------+-------+-------+
| 1     | 2     | 3     |       |	| 1     | 2     | 3     | alt-F |
|       |       |       |(PRINT)|	| alt-A | alt-S | alt-D |       |
+-------+-------+-------+       |	+-------+-------+-------+ ENTER |
| 0             | .     | ENTER |	| 0             | .     |       |
|               |       |       |	| alt-Z   alt-X | alt-C | alt-V |
+---------------+-------+-------+	+---------------+-------+-------+

Only the ALT keypad equivalents are currently possible on the PC/AT.

To defeat the ALT keypad emulation and allow the ALT key to be used a
"META" key, select and toggle the 4th bit of block 3 in setup C.

On the TI Pro, to properly emulate the vt100 keypad, the scan codes
for the keypad keys "0" thru "9", "-", "," and "ENTER" have been re-mapped
to F5, F6, F7 or F8 (using either ctrl, alt or shift) depending on their
relative positions on the keypad.
	+-------+-------+-------+-------+
	| 7     | 8     | 9     | -     |
	|  F5   |  F6   |  F7   |  F8   |	aN = alt N
	+-------+-------+-------+-------+	cN = ctrl N
	| 4     | 5     | 6     | ,     |	sN = shift N
	| cF5   | cF6   | cF7   | cF8   |
	+-------+-------+-------+-------+
	| 1     | 2     | 3     | aF8   |
	| aF5   | aF6   | aF7   |       |
	+-------+-------+-------+ ENTER |
	| 0             | .     |       |
	| sF5     sF6   | sF7   | sF8   |
	+---------------+-------+-------+

Ignored TI Pro keys: INS, DEL and PRNT.
@