APPENDIX NINETEEN _________________________________________________________



XL/XE Programs
BASIC Software Toggle
This is a version of the BASIC switcher routine used in a public do-
main program called "RamMaster," available on the Gateway BBS,
St. Louis, Missouri, used here with permission by its author, Matt
Ratcliff. The program creates an AUTORUN.SYS file which prompts
you to turn BASIC on and off; there's no need to hold down the OP-
TION key when booting a disk. When you turn it off from DOS, you
gain the 8K RAM it occupies; DOS takes advantage of this memory
space for copy and disk duplication routines. Refer back to the
XL/XE memory map for more information.

800XL BASIC Switcher

10 GRAPHICS 0:DIM A$(10):? "800XL BASIC SWI
   TCHER"
15 PRINT "By Matthew Ratcliff  3/25/85"
20 PRINT :PRINT "GET DOS DISK READY AND PRE
   SS RTN;"
25 INPUT A$
30 TRAP 200:OPEN #1,8,0,"D:AUTORUN.SYS"
40 RESTORE
50 READ A:IF A<0 THEN 100
60 PUT #1,A:GOTO 50
100 CLOSE #1:PRINT "BASIC SWITCHER READY."
105 PRINT "PUT THIS FILE ON ALL YOUR 'BASIC
    '"
110 PRINT "PROGRAMMING DISKS.":PRINT
115 PRINT "SAVE THIS LOADER AS A BACKUP!"
120 END
200 PRINT "UNEXPECTED ERROR ";PEEK(195)
210 PRINT "AT LINE ";PEEK(186)+256*PEEK(187
    ):END
1000 DATA 255,255,0,52,236,53,173,250,3,240
     ,1
1005 DATA 96,32,160,53,76,34,52,184,176
1010 DATA 176,216,204,160,194,193,211,201,1
     95
1015 DATA 160,211,247,233,244,227,232,229,2
     42,155,4
1020 DATA 162,12,160,52,32,120,53,76,56,52,
     194
1025 DATA 249,160,205,225,244,170,210,225,2
     44
1030 DATA 155,4,162,44,160,52,32,120,53,76,
     88
1035 DATA 52,80,114,101,115,115,32,35,32
1040 DATA 97,110,100,32,210,212,206,32,107,
     101
1045 DATA 121,58,155,4,162,66,160,52,32,120
1050 DATA 53,76,115,52,91,49,93,32,66,65,83
1055 DATA 73,67,32,160,207,206,160,160,155