How to remake games - search for routines that work with tape.

* HOW TO REDO GAMES *

                         PART TWO


     2. SEARCH FOR SUBROUTINES FOR WORKING WITH TAPE.

   In principle, there are no difficulties here - in any self-respecting
The debugger monitor (and even more so in STS) has a search function
the required bytes. However, please note that the call address
ROM routines may vary - for example, instead of CALL #0562
may be CALL #0561. You might encounter something like this:
CALL #0802, and at address #0802 there is JP #04C2 and RET. You can
try looking for the commands SCF, LD A, #FF , XOR A, etc. - early
or later the required subroutine will be found. Actually, if you're nearby
there are commands LD IX,..., LD DE,..., LD A,.. and CALL nnnn, then
most likely this CALL points to the recording program or
downloads.