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8 For experts: Technical details
8.6.2.2 Additional registers in OSS mode
$D500. . . $D50F: OSS Bank Select (r/w)
7
6
5
4
3
2
1
0
These registers implement the bank select and cart disable as in OSS modules of type“M091”.
A read or write access to the respective address activates the following configuration.
$D500
Module enabled, $A000. . . $AFFF bank 1, $B000. . . $BFFF bank 0
$D501
Module enabled, $A000. . . $AFFF bank 3, $B000. . . $BFFF bank 0
$D508
Module disabled
$D509
Module enabled, $A000. . . $AFFF bank 2, $B000. . . $BFFF bank 0
8.6.2.3 Additional registers in AtariMax mode
$D500. . . $D57F: Bank Select (r/w)
7
6
5
4
3
2
1
0
A read or write access to this area activates the module and selects the bank. An access
to address $D500 selects bank 0, $D501 selects bank 1, . . . , $D57F selects bank 127.
$D580: Cart Disable (r/w)
7
6
5
4
3
2
1
0
A read or write access to this register disables the module.
Caution: In the original AtariMax module the addresses $D581. . . $D5FF can also be
used to disable the module. The cartridge emulation only offers this single address for this.
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