Thread View: net.micro.atari
2 messages
2 total messages
Started by cel
Wed, 15 Jan 1986 19:33
ACTION! and DOS XL
Author: cel
Date: Wed, 15 Jan 1986 19:33
Date: Wed, 15 Jan 1986 19:33
5 lines
760 bytes
760 bytes
On the subject of bank switching in the supercartridges, does anyone know the software proceedure for getting the cartridge to swap? Perhaps writing to a particular address in the cartridge address space?
Re: ACTION! and DOS XL
Author: Harald Striepe
Date: Thu, 16 Jan 1986 23:09
Date: Thu, 16 Jan 1986 23:09
38 lines
1545 bytes
1545 bytes
> > On the subject of bank switching in the supercartridges, does anyone > know the software proceedure for getting the cartridge to swap? > Perhaps writing to a particular address in the cartridge address > space? The "SuperCartridges" make use of the CARTSEL (?) line at $D500. Typically, the lower 4K of cart space are switched ($A000-$AFFF). Location $AFFF contains the current bank number (I think....). To switch, simply load the bank number in X, and store the accumulator at $D500 X indexed. Bank 8 switches out the complete cart to make RAM available (all 8K). Selecting any valid bank restores the cart. e.g.: select bank 0 LDX #0 STA $D500,X select RAM LDX #8 STA $D500,X Dont't forget to worry about the display location and OS database when making the cart appear and disappear.... -- Harald Striepe DEC APB-WEST decwrl!muscat!striepe decwrl!dec-rhea!dec-winery!striepe WINERY::STRIEPE
Thread Navigation
This is a paginated view of messages in the thread with full content displayed inline.
Messages are displayed in chronological order, with the original post highlighted in green.
Use pagination controls to navigate through all messages in large threads.
Back to All Threads