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exec.S
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exec.S
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; ****************************************************************************
;
; Execute buttons
;
; ****************************************************************************
#include "include.inc"
.text
; bridges
.global _CalcGetMem
_CalcGetMem: jmp CalcGetMem
.global _Calc
_Calc: jmp Calc
.global _CalcSetMemDelX ; set register X
_CalcSetMemDelX:
ldi r24,REG_X
.global _CalcSetMemDel ; set register and delete stack
_CalcSetMemDel:
jmp CalcSetMemDel
.global _DispChar
_DispChar:
jmp DispChar
.global _CalcConst
_CalcConst:
jmp CalcConst
.global _EditStop
_EditStop:
jmp EditStop
.global __Disp
__Disp: jmp Disp
MainProgText:
.asciz "Main Program"
.balign 2
ClearTxt:
.asciz " Clear? (1=YES) "
.balign 2
; ----- compare operations of ExecIf
ExecIfTab:
.byte C_LTEQ ; 0 (8) <=
.byte C_LT ; 1 (9) <
.byte C_EQU ; 2 (A) =
.byte C_LTEQ ; 3 (B) <=
.byte C_GR ; 4 (C) >
.byte C_NEQU ; 5 (D) <> (not equal)
.byte C_GREQ ; 6 (E) >=
.byte C_GR ; 7 (F) >
.balign 2
; ----------------------------------------------------------------------------
; CLR (0x25)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecClr
ExecClr:
; CLR do not clear T register!
call CalcInit ; reset calculator stack
rcall ClearErr ; clear error
rcall FlagClrDispText ; clear text mode
call LCD_SetFontDef ; set default font
std Y+DATA_FLAG2ND,R_ZERO ; clear 2nd flag
; DESTROYS: -
rcall FlagClrEE ; clear EE flag (but not ENG mode)
rcall EditStart ; start edit mode
; DESTROYS: -
rjmp DispFlags ; display flags
; ----------------------------------------------------------------------------
; 2nd (0x21)
; ----------------------------------------------------------------------------
; INPUT: R24 = key code
; R23 = INV flag (1=set) ... in this '2nd' case flag INV is not cleared
; Z = clear if INV flag was set (=brne)
; DESTROYS: R31, R30, R25, R24
; ----------------------------------------------------------------------------
.global Exec2nd
Exec2nd:
; 2nd flag
; #define F_NONE 0 // no 2nd flag
; #define F_2ND 1 // 2nd flag
; #define F_3RD 2 // 3rd flag
ldd r24,Y+DATA_FLAG2ND ; load 2nd flag
inc r24 ; increase 2nd flag
cpi r24,F_3RD+1 ; check overflow
brcs 2f ; ok
ldi r24,F_NONE ; overflow to no 2nd flag
2: std Y+DATA_FLAG2ND,r24 ; set new 2nd flag
; DESTROYS: -
rjmp DispFlags ; display flags
; ----------------------------------------------------------------------------
; INV (0x22, 0x27)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecInv
ExecInv:
tst r23 ; was INV set?
breq 2f ; INV was not set
; DESTROYS: -
rcall FlagClrInv ; clear INV flag
; DESTROYS: -
rjmp DispFlags ; display flags
; DESTROYS: -
2: rcall FlagSetInv ; set INV flag
; DESTROYS: -
rjmp DispFlags ; display flags
; ----------------------------------------------------------------------------
; CP (0x29)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecCp
ExecCp:
rcall _EditStop ; stop edit mode
ldi r24,CONST_0 ; constant 0
; INPUT: R24 = index of the constant in ConstTab
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcConst
ldi r24,REG_T
; INPUT: R24 = index of a number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: -1
rcall _CalcSetMemDel ; clear register T
IF_RUNNING ; running?
ret ; running program
ldd r24,Y+DATA_PROGINX ; current program index
tst r24 ; main program?
brne 9f ; not main program
; diplay prompt to confirm operation
call DispSetRow1 ; set cursor to ROW1
ldi r30,lo8(ClearTxt)
ldi r31,hi8(ClearTxt)
call DispTextRom ; display text
ldi r24,NOKEY
call ReturnKey ; flush old key
call WaitKey ; wait for a key
cpi r24,KEY_1 ; check key '1'
brne 8f
rcall DispC ; display C
ldi r26,lo8(PROG_NUM-1)
ldi r27,hi8(PROG_NUM-1)
ldi r25,CLEARKEY
; INPUT: R27:R26 = destination address
; R25 = data
; OUTPUT: R24 = old byte
1: call EEWrite ; clear byte
sbiw r26,1
brpl 1b
std Y+DATA_ADDR,R_ZERO
std Y+DATA_ADDR+1,R_ZERO
; DESTROYS: R0
8:
rjmp Disp ; display all
9: ret
; ----------------------------------------------------------------------------
; Code (0x2b)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecCode
ExecCode:
; ----- return if running
IF_RUNNING ; if running, no operation
ret
; ----- load 2 hex digits: from program, 2 digits from user, or as a key
; OUTPUT: R24 = byte
; DESTROYS: R25
call Load2Hex
; ----- save key into keyboad buffer
; INPUT: R24 = key HEX code
; DESTROYS: -
jmp ReturnKey
; ----------------------------------------------------------------------------
; x<>t (0x32)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecXt
ExecXt:
rcall _EditStop ; stop edit mode
rcall _Calc
.byte C_GETMEM(REG_X) ; load X into stack
.byte C_GETMEM(REG_T) ; load T into stack
.byte C_SETMEMDEL(REG_X) ; set X back from stack
.byte C_SETMEMDEL(REG_T) ; set T back from stack
.byte C_END
.balign 2
; DESTROYS: R0
rjmp Disp ; display all
; ----------------------------------------------------------------------------
; x<>y (0x3B)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecXy
ExecXy:
rcall _EditStop ; stop edit mode
; exchange last operation
ldd r25,Y+DATA_LEVEL ; current number of arithmetics operations
tst r25 ; already base level?
brne 2f ; not base level
; check oper level
; OUTPUT: R31:R30 = pointer into OperStack
; R24 = current operation
call ExecLevel ; get current level
andi r24,OPER_MASK ; mask current level
brne 2f ; not invalid operation
; exchange X and LAST
rcall _Calc
.byte C_GETMEM(REG_X) ; load X into stack
.byte C_GETMEM(REG_LAST) ; load last into stack
.byte C_SETMEMDEL(REG_X) ; set X back from stack
.byte C_SETMEMDEL(REG_LAST) ; set last back from stack
.byte C_END
.balign 2
; DESTROYS: R0
rjmp Disp ; display all
2: ; exchange X and current operand
ldi r24,REG_X
; INPUT: R24 = index of variable 0..MEM_NUM-1
; OUTPUT: R31:R30 = address of variable
; R1 = 0
; DESTROYS: R0
call CalcAddrMem
ldi r26,NUM_BYTES ; bytes per number
mul r25,r26 ; offset of number
movw r26,r0 ; offset of number
subi r26,lo8(-(CalcStack)) ; address in calculator stack
sbci r27,hi8(-(CalcStack))
clr r1 ; restore R1 (R_ZERO)
call CalcExcXZ ; exchange numbers at X and Z (destroys R25, r24, R23)
; DESTROYS: R0
rjmp Disp ; display all
; ----------------------------------------------------------------------------
; Pgm Ind (0x62)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecPgmInd
ExecPgmInd:
; ----- get program index
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index, with indirect from keyboard
brcs ExecPgm9 ; error
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load number into stack
; OUTPUT: R24 = unsigned integer
; C flag is set = overflow valid range
; Z flag is set = number is positive or 0 (breq), NZ = number is negative (brne)
; DESTROYS: R31, R30, R25, R_M1..R_M10
; CALCULATOR STACK: -1
call CalcUnstackB ; load byte from the stack
brcs ExecPgm9 ; overflow
brne ExecPgm9 ; negative
rjmp ExecPgm2
; ----------------------------------------------------------------------------
; Pgm (0x36)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecPgm
ExecPgm:
; ----- INV - load current program index
breq 1f ; INV not set
rcall _EditStop ; stop edit mode
ldd r24,Y+DATA_PROGINX ; current program index
rcall ExecLoadByte ; load byte into X
IF_RUNNING
ret
rjmp ExdecPgm6
; ----- get program index
; OUTPUT: R24 = typically 0..159 (0 on break), but can be 0..0xFF
; C is set on invalid key from keyboard, break input (in such case R24 = 0)
; R1 = 0
; DESTROYS: R31, R30, R27..R25, R_M1..R_M10, R0
1: call Load2Dig ; load 2 digits (from user with indirect or from program)
brcs ExecPgm9 ; error
; ----- check program index
ExecPgm2:
ldd r25,Y+DATA_PROGNUM ; number of programs in library module
cp r25,r24 ; check program index
brcc 2f ; program index is OK
; OUTPUT: CY = error flag
; DESTROYS: -
jmp CalcError ; error
; ----- if running, open program later
2: IF_RUNNING ; if running
std Y+DATA_PROGNEXT,r24 ; next program index
IF_RUNNING ; if running
ExecPgm9:
ret
; ----- save address in main program
ldd r25,Y+DATA_PROGINX ; current program index
tst r25 ; main program
brne 4f ; not main program
ldd r25,Y+DATA_ADDR
std Y+DATA_SAVEADDR,r25
ldd r25,Y+DATA_ADDR+1
std Y+DATA_SAVEADDR+1,r25
; ----- open program
; INPUT: R24 = program index (0=main)
; DESTROYS: R31, R30, R24, R0
4: rcall OpenProg
; ----- inicialize current address (reset to begin, or restore main address)
ldd r24,Y+DATA_PROGINX ; current program index
tst r24 ; main program?
ldd r24,Y+DATA_SAVEADDR ; saved address
ldd r25,Y+DATA_SAVEADDR+1
breq 5f ; main program, restore old address
ldd r24,Y+DATA_PROGBEG ; program begin
ldd r25,Y+DATA_PROGBEG+1
5: std Y+DATA_ADDR,r24 ; set new current address
std Y+DATA_ADDR+1,r25
; ----- display program
ExdecPgm6:
; DESTROYS: -
call DispSetRow1 ; set cursor to start of ROW1
; ----- main program
ldd r24,Y+DATA_PROGINX ; current program index
tst r24 ; main program?
brne 2f ; not main program
; INPUT: R31:R30 = text in ROM (terminated with 0)
; DESTROYS: R31, R30, R24
ldi r30,lo8(MainProgText)
ldi r31,hi8(MainProgText)
call DispTextRom ; display text from ROM
rjmp 3f
; ----- module program
; INPUT: R24 = program index (1,...)
; OUTPUT: R31:R30 = program address in ROM
; DESTROYS: R0
2: ldd r24,Y+DATA_PROGNUM ; number of programs
inc r24 ; end of programs
rcall GetProgAddr ; get address of program end
; module name
lpm r24,Z+ ; module name
; INPUT: R24 = character or data
; DESTROYS: -
rcall _DispChar
lpm r24,Z
; INPUT: R24 = character or data
; DESTROYS: -
rcall _DispChar
; separator
ldi r24,'-'
; INPUT: R24 = character or data
; DESTROYS: -
rcall _DispChar
; program number
; INPUT: R24 = number
; DESTROYS: -
ldd r24,Y+DATA_PROGINX
rcall Disp2Dig ; display program number
; DESTROYS: -
call DispSpc
; program length
ldi r24,'('
; INPUT: R24 = character or data
; DESTROYS: -
rcall _DispChar
ldd r24,Y+DATA_PROGEND
ldd r25,Y+DATA_PROGEND+1
ldd r30,Y+DATA_PROGBEG
sub r24,r30
ldd r30,Y+DATA_PROGBEG+1
sbc r25,r30
; INPUT: R25:R24 = number
; DESTROYS: -
rcall Disp3Dig
ldi r24,')'
; INPUT: R24 = character or data
; DESTROYS: -
rcall _DispChar
; clear rest of line
; DESTROYS: -
3: call DispSpcClr
; wait some time (0.75 sec)
; DESTROYS: R24
call Wait250ms ; wait 250 ms
; DESTROYS: R24
call Wait250ms ; wait 250 ms
; DESTROYS: R24
call Wait250ms ; wait 250 ms
; restore display
; DESTROYS: -
rjmp DispFlags
; ----------------------------------------------------------------------------
; P->R (0x37)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecPr
ExecPr:
breq ExecPr4 ; not INV
; ----- INV, convert R->P (cartesian -> polar)
; input cartesian: x=Y, t=X
; output polar: x=angle, t=radius
; stop edit mode, validate X and display C if not running
rcall _EditStop ; stop edit mode
rcall _Calc ; calculator
.byte C_GETMEM(REG_T) ; load T (x) ... X
.byte C_GETMEM(REG_X) ; load X (x,y) ... Y
.byte C_RP ; convert to polar (r,a)
.byte C_FROMRAD ; convert from radians (r,a)
.byte C_SETMEMDEL(REG_X) ; save angle (r)
.byte C_SETMEMDEL(REG_T) ; save radius ()
.byte C_END
.balign 2
rjmp Disp ; display
; ----- not INV, convert P->R (polar -> cartesian)
; input polar: x=angle, t=radius
; output cartesian: x=Y, t=X
ExecPr4:
; stop edit mode, validate X and display C if not running
rcall _EditStop
rcall _Calc ; calculator
.byte C_GETMEM(REG_T) ; load radius (r)
.byte C_GETMEM(REG_X) ; load angle (r,a)
.byte C_TORAD ; convert to radians (r,a)
.byte C_PR ; convert to cartesian (x,y)
.byte C_SETMEMDEL(REG_X) ; save Y (x)
.byte C_SETMEMDEL(REG_T) ; save X ()
.byte C_END
.balign 2
rjmp Disp ; display
; ----------------------------------------------------------------------------
; LCD display contrast (0x5A)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecLCD
ExecLCD:
brne 4f ; INV is set
; set LCD contrast
; OUTPUT: R24 = typically digit 0..15 (0 on break), but can be 0..0xFF
; C is set on invalid key from keyboard, break input (in such case R24 = 0)
; R1 = 0
; DESTROYS: R31, R30, R27..R25, R_M1..R_M10, R0
rcall Load1Dig ; load 1 key from program or from user, with indirect
brcs 2f ; key is invalid
cpi r24,10 ; check max. value
brcc 2f ; out of range
std Y+DATA_LCDVO,r24 ; set contrast
; INPUT: R27:R26 = destination address
; R25 = data
; OUTPUT: R24 = old byte
mov r25,r24
ldi r26,lo8(CFG_LCD)
ldi r27,hi8(CFG_LCD)
call EEWrite ; write correction to EEPROM
; DESTROYS: R31, R30, R25..R20
; call LCD_Update ; update display
; ----- Restore LCD display
call LCD_Restore
rcall Disp
2: ret
; get LCD contrast
4: rcall _EditStop ; stop edit mode
ldd r24,Y+DATA_LCDVO ; current contrast
ExecLoadByte:
; INPUT: (R25:)R24 = unsigned integer
; DESTROYS: R31, R30, R25, R24, R_M1..R_M10, R0
; CALCULATOR STACK: +1
call CalcStackB ; stack unsigned byte R24
rcall _CalcSetMemDelX ; set X
SET_XVALID ; set X valid
; DESTROYS: R0
rjmp Disp ; display all
; ----------------------------------------------------------------------------
; Ind (0x40)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecInd
ExecInd:
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index, with indirect from keyboard
brcs 9f ; error
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load number into stack
; OUTPUT: R24 = unsigned integer
; C flag is set = overflow valid range
; Z flag is set = number is positive or 0 (breq), NZ = number is negative (brne)
; DESTROYS: R31, R30, R25, R_M1..R_M10
; CALCULATOR STACK: -1
call CalcUnstackB ; load byte from the stack
brcs 8f ; overflow
brne 8f ; negative
rjmp Exec ; execute key code
; OUTPUT: CY = error flag
; DESTROYS: -
8: call CalcError ; error
9: ret
; ----------------------------------------------------------------------------
; Get memory index, with indirect from keyboard
; ----------------------------------------------------------------------------
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
; ----------------------------------------------------------------------------
.global ExecMemNum
ExecMemNum:
push r23
; DESTROYS: R27, R26, R25, R24, R20
rcall _EditStop ; stop edit mode
; OUTPUT: R24 = typically 0..159 (0 on break), but can be 0..0xFF
; C is set on invalid key from keyboard, break input (in such case R24 = 0)
; R1 = 0
; DESTROYS: R31, R30, R27..R25, R_M1..R_M10, R0
call Load2Dig ; load 2 digits, with indirect from keyboard
brcs 1f ; error
cpi r24,USER_NUM ; max. memory
brcs 2f ; OK
; OUTPUT: CY = error flag
; DESTROYS: -
call CalcError ; error
1: pop r23
ret
2: subi r24,-USER_FIRST
clc
pop r23
ret
; ----------------------------------------------------------------------------
; Get memory index indirected
; ----------------------------------------------------------------------------
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20, R_M1..R_M10
; ----------------------------------------------------------------------------
.global ExecMemNumInd
ExecMemNumInd:
push r23
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index, with indirect from keyboard
brcs 9f ; error
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load number into stack
; OUTPUT: R24 = unsigned integer
; C flag is set = overflow valid range
; Z flag is set = number is positive or 0 (breq), NZ = number is negative (brne)
; DESTROYS: R31, R30, R25, R_M1..R_M10
; CALCULATOR STACK: -1
call CalcUnstackB ; load byte from the stack
brcs 8f ; overflow
brne 8f ; negative
cpi r24,USER_NUM ; max. memory
brcc 8f ; invalid index
subi r24,-USER_FIRST ; real index
pop r23
clc
ret
; OUTPUT: CY = error flag
; DESTROYS: -
8: call CalcError ; error
9: pop r23
ret
; ----------------------------------------------------------------------------
; STO Ind (0x72)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecStoInd
ExecStoInd:
; ---- get memory index indirected
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20, R_M1..R_M10
rcall ExecMemNumInd
brcs ExecSto9 ; error
rjmp ExecSto2
; ----------------------------------------------------------------------------
; STO (0x42)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecSto
ExecSto:
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index
brcs ExecSto9 ; error
ExecSto2:
push r24
ldi r24,REG_X
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load X into stack
pop r24
; INPUT: R24 = index of a number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: -1
rjmp _CalcSetMemDel ; set memory
ExecSto9:
ret
; ----------------------------------------------------------------------------
; RCL Ind (0x73)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecRclInd
ExecRclInd:
; ---- get memory index indirected
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20, R_M1..R_M10
rcall ExecMemNumInd
brcs ExecSto9 ; error
rjmp ExecRcl2
; ----------------------------------------------------------------------------
; RCL (0x43)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecRcl
ExecRcl:
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index
brcs ExecSto9 ; error
ExecRcl2:
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load memory into stack
rcall _CalcSetMemDelX ; set X from stack
; DESTROYS: R0
rjmp Disp ; display all
; ----------------------------------------------------------------------------
; SUM Ind (0x74)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecSumInd
ExecSumInd:
; ---- get memory index indirected
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R23, R20, R_M1..R_M10
rcall ExecMemNumInd
brcs ExecSto9 ; error
rjmp ExecSum2
; ----------------------------------------------------------------------------
; SUM (0x44)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecSum
ExecSum:
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index
brcs ExecSto9 ; error
ExecSum2:
push r24
push r23
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load memory into stack
ldi r24,REG_X
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load X into stack
pop r23
tst r23 ; INV ?
breq 2f ; INV not set
; DESTROYS: R31, R30, R25, R24
call CalcNeg ; negate X
; DESTROYS: all
; CALCULATOR STACK: -1
2: call CalcAdd ; add or subtract
pop r24
; INPUT: R24 = index of a number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: -1
rjmp _CalcSetMemDel ; set memory
; ----------------------------------------------------------------------------
; Inc Ind (0x6B)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecIncInd
ExecIncInd:
; ---- get memory index indirected
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20, R_M1..R_M10
rcall ExecMemNumInd
brcs ExecSto9 ; error
rjmp ExecInc2
; ----------------------------------------------------------------------------
; Inc (0x9c)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecInc
ExecInc:
; OUTPUT: R24 = memory index
; C = set if error
; DESTROYS: R31, R30, R27, R26, R25, R20
rcall ExecMemNum ; get memory index
brcs ExecSto9 ; error
ExecInc2:
push r24
push r23
; INPUT: R24 = index of the number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcGetMem ; load memory into stack
pop r23
tst r23 ; INV ?
breq 2f ; INV not set
; DESTROYS: R31, R30, R25, R24
call CalcDec ; decrement
rjmp 3f
; DESTROYS: all
; CALCULATOR STACK: -1
2: call CalcInc ; increment
3: pop r24
; INPUT: R24 = index of a number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: -1
rjmp _CalcSetMemDel ; set memory
; ----------------------------------------------------------------------------
; CMs (0x47)
; ----------------------------------------------------------------------------
; INPUT: R24 = key HEX code 0x00..0xFF
; R23 = INV flag (1=set)
; Z = clear if INV flag was set (=brne)
; ----------------------------------------------------------------------------
.global ExecCms
ExecCms:
push r23
rcall _EditStop ; stop edit mode
; load constant 0
ldi r24,CONST_0
; INPUT: R24 = index of the constant in ConstTab
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
; CALCULATOR STACK: +1
rcall _CalcConst ; load constant 0
pop r23
tst r23 ; INV ?
breq 4f ; not INV, clear whole memory
rcall _EditStop ; stop edit mode
; clear registers X and T
ldi r24,REG_X
; INPUT: R24 = index of a number
; OUTPUT: R1 = 0
; DESTROYS: R31, R30, R27..R24, R0
call CalcSetMem ; clear register X
ldi r24,REG_T