Ice Demons single file version now posted

[Hot Rod <hotrod.apple2@gmail.com>]

Well, I ended up taking a closer look at the Ice Demons full disk image I had uploaded yesterday, since it was in multiple files.  To my dismay, I found that it still has raw disk access in it, for retrieving an odd indirection through the keyboard buffer, but also for reading/writing high scores.  That wouldn't be so bad, except that it directly writes to track $11, sectors $0D-$0F, so it could end up frying a catalog if someone just copied the files another disk (this disk had been modified to have the catalog start at sector $0B).

I also noted that the title screen doesn't reappear when it loops back through the game restart.  And the original publisher name was gone.

So... after having spent time to figure that out, I opted to create a single file, single load version that would be safe to move around to other disks.  It sacrifices the saving of the high scores though.

I also uploaded my notes, but here they are too. So that was my retro project for the day.

Regards. 

]HR

----------------

obj0 - A$800, L$17FE
obj1 - A$4000,L$4FFE
titlepic.pic - A$4000,L$18C3
unpack - A$300,L$82
tonegen - A$300,L$C7

start is $8620

idpic.pak - A$4000,L$1447
p.packer now used to re-pack the title and unpak

$7FD: jump to $8600
$800-$1FFE: obj0
$2000-$6FFE: obj1
$7000-$8447:packed picture
$8480-$84FF:unpack routine
$8500-$85C7:tonegen
$8600: set up stuff


move tonegen to $300
move setup(self) to $BA00
jump to $BA1D to continue
move packed picture+unpack to $A500 (tromps DOS) [slid up to make room for scores]
move obj1 to $4000
unpack title
clean up the high score buffers; use the $89FB routine and just copy around
jump to $8620