handleReadLine used DP1 for the frame and the conversion only looked for
DP2, so it kept the whole dance - and the dance had become a no-op that
looked like work: MVQA copied Q into A, A was written over the saved Q, and
RETI restored it, which is where it started. readLine leaves the length in
Q and SRET keeps Q, so the answer simply stands.
No handler in CosmOS knows what an interrupt frame looks like now. The
0d02 and 0d05 offsets still in the file are structures - an SBEX header, an
entry in the instruction table - and not frames.
Anachronaut
f1cc2e56b2