Animate screen transition like Golvelious does.

[plattysoft]

SCREEN SCROLL custom instruction shows promise, but we need to load the new data in the screen somehow (reading from resource address does not work)
We could copy the current and the next room to RAM and that way we could copy from RAM to VRAM.
Not sure how to find out unused RAM from basic, or maybe create an array and just use it using POKE?

[plattysoft]

Screencast.from.01-23-2024.09.21.01.PM.webm

This code does it, screen scroll uses the joystick direction, then we add the new line.

FOR I=0 TO 20
  SCREEN SCROLL 1
  CMD RAMTOVRAM AR+&H20*I, &H1800, &H20
NEXT I

We should delete the last row first to not scroll into the item area, or do some other trick (it will break on side scroll as well)
We might need to write it by hand

[plattysoft]

This other option is massively slower

12310 FOR I=0 TO 20
12320  FOR J=19 TO 0 STEP -1
12330   FOR K=0 TO 3
12340    T=VPEEK(&H1800+J*32+K):VPOKE &H1800+(J+1)*32+K, T
12350    CMD RAMTOVRAM AR+&H20*I, &H1800, &H20
12360   NEXT K
12370  NEXT J
12380 NEXT I