More scrolling issues. In fact, EERILY similar to the
Keen 4 & 6 issues. But now we have source code!
Suffers from the same scrolling problem as Commander
Keen 4 & 6. Strange rendering issue in top 5-or-so
horizontal pixel rows at top of screen. Often happens
at the bottom, too. Seems to be mixing up where to
draw pixels. Check it out.
Execute mario.EXE 0 689285
Special file open command 40 file C:\SUPERM~1
Writing 00 to undefined port 03D6 1722535