10
20
30 :
40 DIM A%(4096):CLEAR:DIM mem% &3FFF:file$="DFS224"
50 OSCLI "Load "+file$+" "+STR$~mem%
60 ver%=mem%!13:sel=0
70 IF ver%=&34322E32:sel=&8C8F:
80 IF ver%=&39322E32:sel=&8CAB:
90 IF sel=0:PRINT"Unrecognised version":END
100 patch=&4000:REPEAT:patch=patch-1:UNTILmem%?patch<>mem%?&3FFF:patch=patch+&8001
110 table=mem%!(sel-&7FFF) AND &FFFF
120 :
130 FOR P=0 TO 1
140 P%=sel:O%=P%-&8000+mem%
150 [OPT P*3+4:JSR DenSelect:]
160 P%=spare%:O%=P%-&8000+mem%
170 [OPT P*3+4
180 .DenSelect
190 ASL A:ASL A:\ Move b3 from drive number to b5 for DrvCtrl register
200 EOR table,X:\ Mask into drive select byte
210 RTS
220 ]
230 NEXT
240 PRINT "*SAVE ";file$+"+ ";~mem%;"+4000"