(34S) Full Key Scan Map w/ A-Z to 1-26 conversion [highly compressed; <37 steps!]

[Nick]

This key scan / menu converts letters A-Z to 1-26 with the exception of Y which is firmware reserved (substitute any key/chord of your choice for Y/25). The design uses exclusion and accumulating offsets for compression.

If you desire values other than 1-26, insert your additional offset after line 25 (ex. to convert to ASCII).

If you can compress it further, I'd love to see it and learn some new tricks.

The demo returns 1-26 for A-Z and negative values for the remaining scan codes. Insert your code everywhere you like!

Enjoy,
Nick

Code:

01 LBL 'KEY'
02 LBL 00
03 VIEW X
04 PSE 99
05 KEY? X
06 GTO 00
07 LBL?->X
08 GTO->X
09 ENTER
10 SDR 001
11 IP
12 GTO->X
13 LBL 01
14 DEC Y
15 DEC Y
16 LBL 03
17 LBL 04
18 DEC Y
19 LBL 02
20 LBL 05
21 LBL 06
22 LBL 07
23 # 007
24 *
25 -
26 GTO 00
27 LBL 24
28 LBL 25
29 LBL 26
30 LBL 31
31 LBL 35
32 LBL 41
33 LBL 51
34 LBL 61
35 LBL 62
36 LBL 72
37 +/-
38 GTO 00
39 RTN

Comments:

All labels shown (except KEY and 00) are required due to the alpha conversion formula's use of exclusion. If you're not using them, they still need to be in place and you can simply route them to no-action/loop as a group.

Insert your code to respond to A-Z between 25 and 26 including any further offset(s) (ex. ASCII). Step 26 loops to repeat the demo.

Insert your code for other keys after labels at steps 27 through 36, adjusting branching as desired. Step 37 denotes scan codes for the demo and can be removed. Step 38 loops to repeat the demo.

Edit: Updated Subject from 39 to 37 steps!

[Nick]

In response to a mini-challenge, Didier Lachieze posted the following improvement at a reduction of two steps! Great job:

(08-26-2016 03:49 PM)Didier Lachieze Wrote:  Nice job! It's pretty well compressed already.
But ... as it is a challenge, here is a 37 steps version:

Code:

01 LBL 'KEY'
02 LBL 00
03 VIEW X
04 PSE 99
05 KEY? X
06 GTO 00
07 LBL?->X
08 GTO->X
09 ENTER
10 SDR 001
11 IP
12 LBL?->X
13 GTO->X
14 SKIP 006
15 LBL 01
16 DEC Y
17 DEC Y
18 LBL 03
19 LBL 04
20 DEC Y
21 # 007
22 *
23 -
24 GTO 00
25 LBL 24
26 LBL 25
27 LBL 26
28 LBL 31
29 LBL 35
30 LBL 41
31 LBL 51
32 LBL 61
33 LBL 62
34 LBL 72
35 +/-
36 GTO 00
37 RTN

Comments:

Due to Didier's use of additional exclusion (an improvement), this makes labels {2, 5, 6, 7} still reserved -- they cannot appear in the routine if it is to perform as specified (you'd get unintended branching -- unless that were your intention).

And now that I think of it, the scan codes of A - Z are also reserved, but this could be of benefit as it allows you to override the behavior of any letter by adding a label that contains its original scan code. How about that...