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"save area" is used to save modified system variables and ports. It's

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shared between the second and main chunk.
This commit is contained in:
Christian Groessler
2013-05-30 02:31:25 +02:00
parent 06f441e90f
commit 2f6e7874c6
2 changed files with 31 additions and 0 deletions
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6
libsrc/atari/save_area.inc Normal file
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.import SAVMSC_save
.import MEMTOP_save
.import APPMHI_save
.import RAMTOP_save
.import PORTB_save

25
libsrc/atari/save_area.s Normal file
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;
; Atari XL, shared data between 2nd load chunk and main chunk
;
; Contains old values of modified system variables and ports.
;
; Christian Groessler, chris@groessler.org, 2013
;
.if .defined(__ATARIXL__)
.export SAVMSC_save
.export MEMTOP_save
.export APPMHI_save
.export RAMTOP_save
.export PORTB_save
.segment "SAVEAREA"
SAVMSC_save: .res 2
MEMTOP_save: .res 2
APPMHI_save: .res 2
RAMTOP_save: .res 1
PORTB_save: .res 1
.endif