Apple Logic Board Technical Information PDF herunterladen (Seite 25)

D. MISCELLANEOUS ROUTINES, POINTERS, ETC.

Location Function

$BFOO Routine which enables the 16K bank of

Saturn 64K or 128K board which contains DOS

(called prior to entering relocated DOS)

This routine also disables card containing

alternate BASIC.

$BF17 Routine which disables 16K bank of

Saturn 64K or 128K board which contains DOS.

(called upon exit from relocated DOS)

This routine also enables the alternate

BASIC, if required.

$BF72, $BF73 BLOAD/BRUN start address (formerly at

$AA72, $AA73)

$BF6O, $BF6l BLOAD/BRUN length (formerly at $AA6O,

$AA6l)

$BF66 — $BF73 DOS command parameter buffer (formerly

at $AA66 — $AA73)

$BFB8 DOS I/O paramter area (formerly $B5BB)

$BFE8 DOS I/O block for RWTS (formerly $B7E8)

$4C, $4D (INTEGER) HIMEM = $BEOO (formerly $9600)

$73, $74 (APPLESOFT)

$3D0 Routine to re—connect DOS = $BF28

(formerly at $9DBF).

$BEE4 — $BEE8 Routine which effectively wipes out

BASIC in Saturn 64K or 128K board upon

boot of relocated DOS (slot 0 only) by

writing 0 at location $EOOO. Change

to NOP’s to defeat this feature.

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Apple Logic Board Technical Information Seite 25