Kenn Garroch's utility for the BBC micro displays your disk catalogue in a neat four column array. You can then choose a file and execute it.
To begin with the file at the top left of the display is highlighted in red and you can move this highlight around like a cursor using the cursor keys. When you have positioned the cursor on the file you want to work with, press RETURN to execute it. If it is a text file, it will try and load the ROM word processor (Wordwise to be exact), if you have one, if not then a syntax error will be generated.
If it is a Basic file, it is automatically CHAINed, i.e. LOADed and RUN.
Machine code files are loaded to their specified load addresses and then run from their execute addresses.
The program contains a number of useful utilities that may be extracted and used elsewhere; in fact, they were written with this in mind as the procedures and functions nearly all use Local variables.
Once the program is typed in and running, it can be made to auto boot with the following:
*BUILD !BOOT
1 CHAIN"MENU"
2 <ESCAPE>
*OPT 4,3
Pressing SHIFT and BREAK will now automatically run the Menu program.
Program Notes
10
Screen mode 7 for serial attributes
20-30
DIM two arrays to hold the catalogue information
40-50
Set aside a block memory
60
Read catalogue from disk
70
Format the catalogue information
80
Print catalogue on the screen
90
Execute selected file
100
Repeat
110
Start definition of PROCKAT
120
Set up local variables
130
Read disk, track 0, sector 0
140-180
Read filenames into array
190
Read disk, track 0, sector 1
200-220
Read file information into Kat array
240-400
Standard track sector read write routine using OSWORD &7F
410
Define procedure to print catalogue
440-445
List title in double lines
450
Move cursor
460-480
Prints formatted filenames on the screen
490
Print last three files
510
Define a function to select a file
520
Define editing keys as ordinary keys
530
Set up pointers
540
Highlight first filename in read (could change first attribute to flash etc)
550
Gets a key
560
Turn off highlight
570-600
Test for cursor keys and updates H and V accordingly
610
Check for carriage return
630-650
Makes the cursor wrap around
660
Renew highlight
680
Repeat
690
Return keys to editing mode
700
The result of the function is the file number
710-770
Format Kat$ with directory name
780
Get file number
810
If a text file then executes word processor
820
If Basic file then CHAIN it. N.B. If 1982 BASIC then 8023 should be 801F
830-840
Set x and y registers to point to Para
850
POKE filename into Para
860
Execute OSCLI on machine code file
880-1050
Execute word processor. NB. This is set up for Wordwide and will need modification for others
16th June 1984