     KERNAL Versions:

       Revision 1 (prototype, not mentioned in AAY64)
       Revision 2 ("old", used until 1983(?))
       Revision 3 ("new", used from 1983(?) on)
       SX64       (like Rev. 3, but adapted for the SX64)

       AAY64 contains a disassembly of the new version, but differences
       are also stated. They are at:

      +-------------------------------------------------------------------------
      |   Rev. 2 <> Rev. 3
      +-------------+-----------------------------------------------------------
      | $E4AC       | Version Indicator(?)
      | $E4D3-$E4D9 | Patch for RS232-Routines
      |             |   Old Kernal didn't set Input Parity at $AB
      | $E4DA-$E4DC | Reset Character Color
      |             |   Old Kernal gets Color from $D021 instead of $0286.
      | $E57C-$E599 | Set Screen Pointers
      |             |   Old Kernal lacks some error-checks
      | $E622+$E623 | Input From Keyboard
      |             |   Old Kernal doesn't check if cursor line = 0
      | $EA07-$EA12 | Clear Screen Line
      |             |   Just a differnce in order of code
      | $EF94-$EF96 | Process RS-232 Byte
      |             |   Apply patch at $E4D3 in newer version
      | $FF80       | Version number
      +-------------+-----------------------------------------------------------

      +-------------------------------------------------------------------------
      |   SX64 <> Rev. 3
      +-------------+-----------------------------------------------------------
      | $E479-$E4AC | Power-Up Message
      |             |   Adapted for SX64
      | $E4AC       | Version Indicator(?)
      | $E535       | Initialize I/O
      |             |   Text-Color is Blue instead of Light Blue
      | $E5EF       | Input From Keyboard
      |/$E5F4+$E5F5 |   Other parameters for RUN/STOP-String
      | $ECD9+$ECDA | Video Chip Setup Table
      |             |   Cyan Border and White Background
      | $F0D8-$F0E6 | Table of Kernal I/O Messages
      |             |   New RUN/STOP-String (loads from disk as SX64 has no tape)
      | $F387       | Open File
      |             |   Tape access will cause error
      | $F4B7       | Load RAM
      |             |   Tape access will cause error
      | $F5F9       | Save RAM
      |             |   Tape access will cause error
      | $FF80       | Version number
      +-------------+-----------------------------------------------------------