Paxination hat geschrieben: I am really needing/wanting the atari assembler editor rom on my pc

CARTRIDGE A (LEFT CARTRIDGE)

OK, all Atari computers have a left cartridge slot. Since it may be the only slot, it makes more sense to refer to it as cartridge A.

Cartridge A takes up memory locations 40960 through 49151 ($A000 through $BFFF). This will only affect you if you have 48K of RAM, since these locations are the last 8K.

The last six bytes in a cartridge provide the information that the OS needs in order to run the cartridge. Thus:

49146,49147 ($BFFA, $BFFB) holds the starting (run) address of the cartridge.

49148 ($BFFC) equals zero if a cartridge is plugged in, and doesn't if one isn't.

49149 ($BFFD) tells the OS how to get the cartridge going. If bit zero is set, then the OS boots the disk before it runs the cartridge. If bit two is set, then the cartridge is initialized but not run (if it's not set then it gets run).

49150,49151 ($BFFE,$BFFF) holds the initialization address of the cartridge.

Note that these addresses are all for cartridge A. For cartridge B, just subtract 8192 from each address.

If cartridge A is present, TSTDAT at location seven gets set to one during powerup.

If you're using BASIC, then the BASIC cartridge is cartridge A. Because this book is designed to teach you about your Atari, and not about the languages that can be used with it, I'm not going to give you a detailed listing of all the locations in the BASIC cartridge. Don't feel as though you're missing out on something great, however; there's very little in there that would be useful to you. The OS listing does mention four routines, however, so I will mention those.