120 Chapter 2: TI-83 Plus Specific Information
TI-83 Plus Developer Guide Third Release May 28, 2002
Put Away Code
This code should not be used when the application terminates on its own. An application
should follow the Stand-alone example to exit without the monitor initiating the
termination.
AppPutAway:
;
;
; Application gets itself ready for terminating by cleaning any system flags
; or saving any information it needs to.
;
RES plotLoc, (IY+plotFlags) ; draw to display & buffer
RES textWrite, (IY+sGrFlags) ; small font written to
; display
; This next call resets the monitor control vectors back to the App Loader
;
B_CALL ReloadAppEntryVecs ; App Loader in control of
; monitor
;
LD (IY+textFlags),0 ; reset text flags
;
; This next call is done only if application used the Graph Backup Buffer
;
B_CALL SetTblGraphDraw
;
; Need to check if turning off or not, the following flag is set when
; turning off:
;
BIT MonAbandon,(IY+monFlags) ; turning off ?
JR NZ, TurningOff ; jump if yes
;
; if not turning off then force control back to the home screen
;
; note: this will terminate the link activity that caused the application
; to be terminated.
;
LD A, iall ; all interrupts on
OUT (intrptEnPort), A
B_CALL LCD_DRIVERON ; turn on LCD
SET onRunning, (IY+onFlags) ; on interrupt running
EI ; enable interrupts
B_JUMP JForceCmdNoChar ; force to home screen
;
TurningOff:
B_JUMP Putaway ; force App loader to do its
; put away
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