Posted By
Exin
on 2007-08-03
08:02:08
|  Exchanging Plus/4 roms
Is there any way to exchange the 3 plus 1 roms with something useful?
|
|
Posted By
TLC
on 2007-08-03
09:23:42
| Re: Exchanging Plus/4 roms
Two standard 27128 roms will fit right away (I'm not sure of flashes and eeproms, but you may be lucky here also). As all roms in the Plus/4, they map to $8000 and $c000 (respectively). If you need autoinit, that's also possible (it's sort of similar to the C64 Kernal's autoinit feature for expansion roms).
|
|
Posted By
Exin
on 2007-08-03
20:50:39
| Re: Exchanging Plus/4 roms
Mmmm...that would be 16K. I wish there would be a graphics editor for that size. Multibotticelli seems to be too big 
Any other suggestions? How would an autoinit look like? I would like to map the program where it's supposed to be (Mostly $1000-$5000 range)
|
|
Posted By
Rachy
on 2007-08-04
03:51:44
| Re: Exchanging Plus/4 roms
I guess it would be easier to copy/decompress the program to that address. It is not 16k, but ~32k: $8000-$BFFF and $C000-$FFFF (without the area of $FD00-$FF3F).
Autoinit is nothing fancy, you need to add a special mark around the beginning of the ROM (characters: "CBM" and some number, as I remember) and your code will be called from the start address of the ROM. You can do whatever you want to there. Check out how it looks the ROM from $8000. You can even try out your ROM in Yape before burning it into the chips.
|
|
