Consider this program:
10 HGR2 : HCOLOR= 5
20 FOR I = 1 TO 199 STEP 3
30 HPLOT 100,100 TO I,10
40 NEXT
When run without the card installed, it works as expected and remains in memory.
When run with the card installed, the HGR (not HGR2) screen is shown and nothing happens.
Blindly typing TEXT and then LIST reveals the program is gone, as if one had typed NEW.
Apple IIe, enhanced, with 64k 80 col card.
VGA card in slot 3, happens with 80 col firm ware on or off.
Consider this program:
When run without the card installed, it works as expected and remains in memory.
When run with the card installed, the HGR (not HGR2) screen is shown and nothing happens.
Blindly typing TEXT and then LIST reveals the program is gone, as if one had typed NEW.
Apple IIe, enhanced, with 64k 80 col card.
VGA card in slot 3, happens with 80 col firm ware on or off.