Posted By
Csabo
on 2004-04-24
08:57:57
|  Re: Another Plus/4 question...
You do NOT have to tinker with ACIA or DMA port or anything to use a charset from $F800. You just have to leave the other half of the font (above $FC00) alone.
You said that it would work on a C16 because the rest goes to never-never-land. This is incorrect! I can see that you are assuming that still the WHOLE set would be copied. However, on the C16, $4000 is mapped to $0000, etc, so it would not go to never-land, but rather to $0000 and therefore lock up the machine.
Bottom line, if you are using half a font + reverse, it is enough to copy the ROM font from $D000-$D3FF. |
