dongle-related checksumming problem.)
      
      21) Now that all the dongle-check routines in these files have been
          removed, we need to re-save the two files to our backup:
          < S"@0:L",08,081D,3FFF > < S"@0:S",08,6E00,9FFF >
      
      22) There are two other dongle-routines that need to be changed on
          the Tenth Frame disk. The only problem is that they reside in
          a file called "P", which loads underneath the KERNAL ROM. There
          is no way to use our monitors to view, change and re-save this
          file. Instead, load the Disk Doctor utility by typing
          < LOAD "DISK D*",8 > and then < RUN >.
      
      23) Insert your backup copy of Tenth Frame and press . Use
          the < B > command to read Track 20, Sector 1. Use the cursor
          keys to move to position 63. Using the < @ > command, change
          the byte value (48) to 32. Re-write the sector with the < r >
          command. Then use < + > key to read Track 20, Sector 2. Move
          cursor to position 150. Change byte value (15) to 7. Re-write
          the sector with the < r > command.
      
      24) Let's investigate why we made the changes in the "P" file. From
          the $C000 (49152) monitor, load the "P" file from your backup
          copy by typing <> L "P",08 <>.
      
      25) Since the "P" file resides in memory from $E000-$FEBF, it is
          now residing in the RAM that is "hidden" beneath the KERNAL
          ROM's ($E000-SFFFF). Our monitor won't let us view the RAM, so
          we need to write a short ML program to transfer $E000-$FFFF
          down to lower memory from $4000-$5FFF so we can look at the "P"
          code.
      
          Type in the following routine starting at $0334:
      
          A 0334 SEI
            0335 LDA #$35
            0337 STA $01
            0339 LDX #$00
            033B LDA $E000,X
            033E STA $4000,X
            0341 INX
            0342 BNE $033B
            0344 INC $0340
            0347 INC $033D
            034A BNE $033B
            034C LDA #$37
            034E STA $01
            0350 BRK
      
      25) Type < G 0334 > to execute the routine.
      
            K.J. REVEALED TRILOGY    PAGE [86]     (C)1990 K.J.P.B.