Retro Games THEC64 User Manual page 69

Some virtual disk files (e.g. d64, g64) need the slower 'accurate disk' mode (AD)
enabled before they load successfully. Some virtual disk files need to be set to 'read-
only' (RO) so nothing saves back to the file. Some require both settings.
Multi-disk sets
Continuation disks (CD flag) are relevant to multi-disk programs. They are a handy
way of having all saved states assign to the first disk used in the set. The first disk
does NOT use a CD flag, to set it apart from any subsequent disk files in the set.
For example, we have a C64 program that uses two virtual disk files for side 1 and
side 2 of the original program disk:
program-s1_M6ADRO.d64
program-s2_M6ADROCD.d64
Load and run program-s1_M6ADRO from Media access. At some point during the
program, you use the Save/load state option from the MENU and save to the first
slot. Later on, the program requests side 2 of the disk so you go to Media access and
insert program-s2_M6ADROCD then return to the program and follow the on-screen
instructions to tell it you have now swapped or flipped disks.
The program now continues. At some later point, you choose to save the state again.
When you do so, the first save slot is in use from when you had the first disk inserted,
and you choose to save to the second slot this time.
Later – maybe on a different day – you are in C64 BASIC and insert program-s1_
M6ADRO in Classic mode. You press and choose save/load state without needing
to load the program first. Choose to load either saved state found there and THEC64
will automatically insert the correct disk and continue running the program from
where it was saved.
The CD flags keeps all the saved state files associated with the first disk, and as long
as the other disk files are stored in the same location as when the saved states were
created, restoring them is simply a matter of inserting the first disk and loading the
saved state from there.
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