search

hanshuebner / AppleII-VGA

∀2 Analog VGA card for the Apple II computer line
MIT License
26 stars 0 forks source link

HGR2 Bug. #8

Open TedThompson opened 1 year ago

TedThompson commented 1 year ago

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.

hanshuebner commented 1 year ago

I'll see if I can reproduce the issue in two weeks, when I'm back at my IIe.

TedThompson commented 1 year ago

Thanks, look forward to hearing.

BTW, when I moved it to slot 5, the issue went away and all behaved as expected.