With ARNITECH_BLADE the screen editor, the keyboard matrix scan, and the VIC-II
set-up are left out, and devices 3 and 0 are the Terminal Card the Arnitech
controller finds by its type, $04. CHROUT writes each byte to its Output, or
to its Literal while quote or insert mode is on, keeping QTSW and INSRT as the
screen editor does. CHRIN marks where input starts, echoes the keys typed, and
on RETURN has the Card take the logical line under the cursor and reads it
back. SCNKEY moves the Card's keys into the keyboard buffer up to XMAX, UDTIM
sets STKEY from its RUN/STOP, SCREEN answers 80x25, PLOT moves and reads its
cursor, and CINT resets it and puts the native-mode vectors in place. With no
Terminal Card, bytes printed go nowhere and no key comes.
cc65's C64 runtime and ip65 call past the jump table: $E5B4 takes the first
key from the keyboard buffer (cgetc), $EA24 points USER at the colour RAM of
PNT's line (cursor positioning), and $ECF0 holds the low bytes of the screen
lines' addresses (ip65's VT100 code), as Mapping the Commodore 64 describes
them. vicii_init's work moves out of $E5A0-$E5C8 to free $E5B4, and on the
standard layout PNT and USER are worked out through the routine at $EA24.
chris