Pinball construction set (Electronic Arts, 1983)

[toinet]

Power. Pure, sheer and unadulterated. A nearly telepathic link between you and the machine. Here is the promise made good. Here is the reason why you bought a computer in the first place. It's been called the best program ever written for an 8-bit machine. Boot the disk and find out why.


DISK STRUCTURE
A standard 16-sector disk with the famous track-arcing protection on track 6.


BOOT TRACE
- 9600<C600.C6FFM
- 96FB: AD E8 C0 60
- 9600G
We get a standard boot0 code at $801 with an indirect jump to $B700.
- 96FB: A9 4C 8D 4A 08 A9 59 8D 4B 08 A9 FF 8D 4C 08 4C 01 08
- 9600G
We now have a standard RWTS from $B700 to $BFFF

The game loads parts of it from different tables:
$B762: 20 18 01 0D -> number of pages to load
$B766: 22 03 03 01 -> track
$B76A: 0F 07 08 0C -> sector
$B76E: 3F 1F 40 B5 -> high address in memory
Once parts are loaded, a JMP $1E00 is performed.

Call $B700 with X=$60 and change the JMP $1E00 to a JMP $FF59 (it is at address $B7E2)

At $1E00, we find a call to $1E36 where we find other tables to load data with X containing the index in the tables, then a JSR $1E7D is performed. From there, we have the following code: