Rephrase how the decoder's progress during data interpretation gets
tracked. Extend the set of .wait() conditions in the main loop, and
determine START/STOP conditions and BIT validity there already, which
reduces redundancy with called handlers.
Increase the decoder's coverage of the memory card's feature set and
constraints. Handle the optional CLK during RST, to tell interrupted
memory access from card reset. Interpret known command codes, to present
their meaning and arguments to users, and to tell "outgoing data" (the
card's memory content) from "internal processing" (providing clock until
the card signals completion of a write access). Get initial statistics
on internal processing (clock count, and terminal I/O level, no duration
in units of wall clock time yet).
Unfortunately there is no reliable condition to detect the end of a
memory read when it executes to the end of the memory card's capacity.
That's why START detection is more greedy than specified, to reliably
re-sync to subsequent commands and their byte sequences.
Arrange for an improved set of annotation rows with symbols (bit level),
fields (data bytes), and operations details (summary of memory access
including protection).
Rename the binary output. It carries "any bytes" which were seen, the
command bytes as well as response data bytes.