please dont rip this siteSX KEY Mnenomics List ... To Assembly Language info page. ... To Prof. Wade's information page - rev. 11/24/01-dw

CONTENTS: (linked to locations in list)

LABELS
OPERATORS
  Uniary
  Binary
  Conditional
DIRECTIVES
INSTRUCTIONS
  byte-oriented
  bit-oriented
  inc/dec-conditional branches
  compare-conditional branches
  bit-conditional branches
  unconditional branches
  i/o and control operations
SYMBOLS
  DEVICE_directives
  Dynamic Equates
  Register/Bit EquatesLABELS
Label Description
labelname global label
:labelname local label
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OPERATORS
Unaries

Expression Operato Description
\ Macro argument
|| Absolute
+ (no effect)
- Negate
~ NOT
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Binaries
Expression Operato Description
& AND
| OR
^ XOR
+ Add
- Subtract
* Multiply
/ Divide
// Mod
<< Shift left
>> Shift right (arithmetic)
>< Reverse bits
. Bit Address
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Conditionals
Expression Operato Description
=< Below or equal
=> Above or equal
= Equal
<> Not Equal
< Below
> Above
( Begin sub expression
) End sub expression
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DIRECTIVES

   Directive Description
   DEVICE setting, setting Establish device settings (should precede other directives/instructions)
   ID   '8string' Establish device ID
   RESET   address Assemble 'JMP address' at last location for reset
label   =   value Assign value to variable label - variable labels can be reassigned with '='
label   EQU   value Assign value to constant label - constant labels cannot be reassigned
   
   ORG   address Set origin to address
   DS   locations    Define space: origin=origin+locations
   DW   data,data,...  Define word(s)
   IFDEF   label Begin conditional block if label defined
   IFNDEF   label Begin conditional block if label undefined
   IF   condition  Begin conditional block if true
   ELSE Alternate condition
   ENDIF End conditional block
   REPT   count Begin repeat block
   ENDR End repeat block
label   MACRO   {argcount}  Begin macro definition
   EXITM Exit macro, useful within IF blocks within macro definitions
   ENDM End macro definition
   EXPAND Expand macros (default)
   NOEXPAND Don't expand macros
   CASE Enable case-sensitivity
   NOCASE Disable case-sensitivity
   ERROR   'message' Force error message. Useful within IF blocks. If within MACRO, shows caller
   
   END End source code; stop assembly
   BREAK Set breakpoint in code - only 1 allowed
   WATCH   bitaddress,bits/chrs,style Set variable to watch (style: UDEC/SDEC/UHEX/SHEX/UBIN/SBIN/FSTR/ZSTR)
   FREQ   hertz Set clock frequency from 400,000 to 110,000,000 (default is 50,000,000)

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INSTRUCTIONS

******byte-oriented operations

Instruction Words Flags W used Description Microchip PIC16C5x Equiv
MOV W,#lit 1 - - Move literal into W MOVLW lit
MOV W,fr 1 Z - Move fr into W MOVF fr,0
MOV fr,W 1 - - Move W into fr MOVWF fr
MOV fr,#lit 2 - W Move literal into fr MOVLW lit; MOVWF fr
MOV fr1,fr2 2 Z W Move fr2 into fr1 MOVF fr2,0; MOVWF fr1
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ADD W,fr 1 C,DC,Z - Add fr into W ADDWF fr,0
ADD fr,W 1 C,DC,Z - Add W into fr ADDWF fr,1
ADD fr,#lit 2 C,DC,Z W Add literal into fr MOVLW lit; ADDWF fr,1
ADD fr1,fr2 2 C,DC,Z W Add fr2 into fr1 MOVF fr2,0; ADDWF fr1,1
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MOV W,fr-W 1 C,DC,Z - Move fr-W into W SUBWF fr,0
SUB fr,W 1 C,DC,Z - Subtract W from fr SUBWF fr,1
SUB fr,#lit 2 C,DC,Z W Subtract literal from fr MOVLW lit; SUBWF fr,1
SUB fr1,fr2 2 C,DC,Z W Subtract fr2 from fr1 MOVF fr2,0; SUBWF fr1,1
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AND W,#lit 1 Z - AND literal into W ANDLW lit
AND W,fr 1 Z - AND fr into W ANDWF fr,0
AND fr,W 1 Z - AND W into fr ANDWF fr,1
AND fr,#lit 2 Z W AND literal into fr MOVLW lit; ANDWF fr,1
AND fr1,fr2 2 Z W AND fr2 into fr1 MOVF fr2,0; ANDWF fr,1
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OR W,#lit 1 Z - OR literal into W IORLW lit
OR W,fr 1 Z - OR fr into W IORWF fr,0
OR fr,W 1 Z - OR W into fr IORWF fr,1
OR fr,#lit 2 Z W OR literal into fr MOVLW lit; IORWF fr,1
OR fr1,fr2 2 Z W OR fr2 into fr1 MOVF fr2,0; IORWF fr1,1
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XOR W,#lit 1 Z - XOR literal into W XORLW lit
XOR W,fr 1 Z - XOR fr into W XORWF fr,0
XOR fr,W 1 Z - XOR W into fr XORWF fr,1
XOR fr,#lit 2 Z W XOR literal into fr MOVLW lit; XORWF fr,1
XOR fr1,fr2 2 Z W XOR fr2 into fr1 MOVF fr2,0; XORWF fr1,1
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CLR W 1 Z - Clear W CLRW
CLR fr 1 Z - Clear fr CLRF fr
           
MOV W,++fr 1 Z - Move fr+1 into W INCF fr,0
INC fr 1 Z - Increment fr INCF fr,1
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MOV W,--fr 1 Z - Move fr-1 into W DECF fr,0
DEC fr 1 Z - Decrement fr DECF fr,1
           
MOV W,<<fr 1 C - Move left-rotated fr into W RLF fr,0
RL fr 1 C - Rotate left fr RLF fr,1
           
MOV W,>>fr 1 C - Move right-rotated fr into W RRF fr,0
RR fr 1 C - Rotate right fr RRF fr,1
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MOV W,<>fr 1 - - Move nibble-swapped fr into W SWAPF fr,0
SWAP fr 1 - - Swap nibbles in fr SWAPF fr,1
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NOT W 1 Z - Perform not on W XORLW 0FFh
MOV W,/fr 1 Z - Move not'd fr into W COMF fr,0
NOT fr 1 Z - Perform not on fr COMF fr,1
           
TEST W 1 Z - Test W for zero IORLW 0
TEST fr 1 Z - Test fr for zero MOVF fr,1
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*****bit-oriented operations
Instruction Words Flags W used Description Microchip PIC16C5x Equiv
CLRB bit 1 - - Clear bit BCF bit
CLC 1 C - Clear carry BCF 3,0
CLZ 1 Z - Clear zero BCF 3,2
SETB bit 1 - - Set bit BSF bit
STC 1 C - Set carry BSF 3,0
STZ 1 Z - Set zero BSF 3,2
           
ADDB fr,bit 2 Z - Add bit into fr BTFSC bit; INCF fr,1
ADDB fr,/bit 2 Z - Add not bit into fr BTFSS bit; INCF fr,1
SUBB fr,bit 2 Z - Subtract bit from fr BTFSC bit; DECF fr,1
SUBB fr,/bit 2 Z - Subtract not bit from fr BTFSS bit; DECF fr,1
           
MOVB bit1,bit2 4 - - Move bit2 into bit1 BTFSS bit2; BCF bit1; BTFSC bit2; BSF bit1
MOVB bit1,/bit2 4 - - Move not bit2 into bit1 BTFSC bit2; BCF bit1; BTFSS bit2; BSF bit1
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*****inc/dec-conditional branches
Instruction Words Flags W used Description Microchip PIC16C5x Equiv
MOVSZ W,++fr 1 - - Move fr+1 into W, skip if zero INCFSZ fr,0
INCSZ fr 1 - - Increment fr, skip if zero INCFSZ fr,1
IJNZ fr,addr 2 * - - Increment fr, jump if not zero INCFSZ fr,1; GOTO addr
           
MOVSZ W,--fr 1 - - Move fr-1 into W, skip if zero DECFSZ fr,0
DECSZ fr 1 - - Decrement fr, skip if zero DECFSZ fr,1
DJNZ fr,addr 2 * - - Decrement fr, jump if not zero DECFSZ fr,1; GOTO addr

******compare-conditional branches

Instruction Words Flags W used Description Microchip PIC16C5x Equiv
CSE fr,#lit 3 C,DC,Z W Compare, skip if equal MOVLW lit; SUBWF fr,0; BTFSS 3,2
CSE fr1,fr2 3 C,DC,Z W Compare, skip if equal MOVF fr2,0; SUBWF fr1,0; BTFSS 3,2
CSNE fr,#lit 3 C,DC,Z W Compare, skip if not equal MOVLW lit; SUBWF fr,0; BTFSC 3,2
CSNE fr1,fr2 3 C,DC,Z W Compare, skip if not equal MOVF fr2,0; SUBWF fr1,0; BTFSC 3,2
CSA fr,#lit 3 C,DC,Z W Compare, skip if above MOVLW /lit; ADDWF fr,0; BTFSS 3,0
CSA fr1,fr2 3 C,DC,Z W Compare, skip if above MOVF fr1,0; SUBWF fr2,0; BTFSC 3,0
CSAE fr,#lit 3 C,DC,Z W Compare, skip if above or equal MOVLW lit; SUBWF fr,0; BTFSS 3,0
CSAE fr1,fr2 3 C,DC,Z W Compare, skip if above or equal MOVF fr2,0; SUBWF fr1,0; BTFSS 3,0
CSB fr,#lit 3 C,DC,Z W Compare, skip if below MOVLW lit; SUBWF fr,0; BTFSC 3,0
CSB fr1,fr2 3 C,DC,Z W Compare, skip if below MOVF fr2,0; SUBWF fr1,0; BTFSC 3,0
CSBE fr,#lit 3 C,DC,Z W Compare, skip if below or equal MOVLW /lit; ADDWF fr,0; BTFSC 3,0
CSBE fr1,fr2 3 C,DC,Z W Compare, skip if below or equal MOVF fr1,0; SUBWF fr2,0; BTFSS 3,0
           
CJE fr,#lit, addr 4 * C,DC,Z W Compare, jump if equal MOVLW lit; SUBWF fr,0; BTFSC 3,2; GOTO addr
CJE fr1,fr2, addr 4 * C,DC,Z W Compare, jump if equal MOVF fr2,0; SUBWF fr1,0; BTFSC 3,2; GOTO addr
CJNE fr,#lit, addr 4 * C,DC,Z W Compare, jump if not equal MOVLW lit; SUBWF fr,0; BTFSS 3,2; GOTO addr
CJNE fr1,fr2, addr 4 * C,DC,Z W Compare, jump if not equal MOVF fr2,0; SUBWF fr1,0; BTFSS 3,2; GOTO addr
CJA fr,#lit, addr 4 * C,DC,Z W Compare, jump if above MOVLW /lit; ADDWF fr,0; BTFSC 3,0; GOTO addr
CJA fr1,fr2, addr 4 * C,DC,Z W Compare, jump if above MOVF fr1,0; SUBWF fr2,0; BTFSS 3,0; GOTO addr
CJAE fr,#lit, addr 4 * C,DC,Z W Compare, jump if above or equal MOVLW lit; SUBWF fr,0; BTFSC 3,0; GOTO addr
CJAE fr1,fr2, addr 4 * C,DC,Z W Compare, jump if above or equal MOVF fr2,0; SUBWF fr1,0; BTFSC 3,0; GOTO addr
CJB fr,#lit, addr 4 * C,DC,Z W Compare, jump if below MOVLW lit; SUBWF fr,0; BTFSS 3,0; GOTO addr
CJB fr1,fr2, addr 4 * C,DC,Z W Compare, jump if below MOVF fr2,0; SUBWF fr1,0; BTFSS 3,0; GOTO addr
CJBE fr,#lit, addr 4 * C,DC,Z W Compare, jump if below or equal MOVLW /lit; ADDWF fr,0; BTFSS 3,0; GOTO addr
CJBE fr1,fr2, addr 4 * C,DC,Z W Compare, jump if below or equal MOVF fr1,0; SUBWF fr2,0; BTFSC 3,0; GOTO addr
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******bit-conditional branches
Instruction Words Flags W used Description Microchip PIC16C5x Equiv
SB bit 1 - - Skip if bit BTFSS bit
SC   1 - - Skip if carry BTFSS 3,0
SZ   1 - - Skip if zero BTFSS 3,2
SNB bit 1 - - Skip if not bit BTFSC bit
SNC   1 - - Skip if not carry BTFSC 3,0
SNZ   1 - - Skip if not zero BTFSC 3,2
JB bit,addr 2 * - - Jump to address if bit BTFSC bit; GOTO addr
JC addr 2 * - - Jump to address if carry r BTFSC 3,0; GOTO add
JZ addr 2 * - - Jump to address if zero BTFSC 3,2; GOTO addr
JNB bit,addr 2 * - - Jump to address if not bit  BTFSS bit; GOTO addr
JNC addr 2 * - - Jump to address if not carry BTFSS 3,0; GOTO addr
JNZ addr 2 * - - Jump to address if not zero  BTFSS 3,2; GOTO addr
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****unconditional branches
Instruction Words Flags W used Description Microchip PIC16C5x Equiv
SKIP   1 - - Skip next instruction word BTFSC/BTFSS 2,0
JMP addr 1 * - - Jump to address GOTO addr
JMP PC+W 1 C,DC,Z - Add W into PC ADDWF 2,1
JMP W 1 - - Move W into PC MOVWF 2
CALL addr 1 * - - Call to address CALL addr
RETW lit,lit... 1 - - Return from call, literal in W RETLW lit
RET   1 - - Return from call <none>
RETP   1 - - Return from call, load PA2:PA0 <none>
RETI   1 - - Return from interrupt <none>
RETIW   1 - - Return from interrupt, fix RTCC <none>

Note: Skips should be followed only by single-word instructions, except in the case of PAGE's
* Increase by 1 word if @addr used to insert PAGE instruction.
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****i/o and control operations

Instruction Words Flags W used Description Microchip PIC16C5x Equiv
PAGE addr 1 - - Load PA0:PA2, skip continues <none>
BANK fr 1 - - Load FSR.5:FSR.7 <none>
MODE lit 1 - - Load M (same as MOV M,#lit) <none>
             
MOV M,#lit 1 - - Move literal into M <none>
MOV M,W 1 - - Move W into M <none>
MOV M,fr 2 Z W Move fr into M <none>
MOV W,M 1 - - Move M into W <none>
MOV fr,M 2 - W Move M into fr <none>
             
MOV !port,W 1 - - Move W into port's TRIS TRIS port (port=5 to 7)
MOV !port,#lit 2 - W Move literal into port's TRIS MOVLW lit; TRIS port (port=5 to 7)
MOV !port,fr 2 Z W Move fr into port's TRIS MOVF fr,0; TRIS port (port=5 to 7)
             
MOV !OPTION,W 1 - - Move W into OPTION OPTION
MOV !OPTION,#lit 2 - W Move literal into OPTION MOVLW lit; OPTION
MOV !OPTION,fr 2 Z W Move fr into OPTION MOVF fr,0; OPTION
             
CLR !WDT 1 TO,PD - Clear WDT and prescaler CLRWDT
SLEEP   1 TO,PD - Clear WDT and enter sleep mode SLEEP
IREAD   1 - - Read MODE:W into MODE:W <none>
NOP   1 - - No operation NOP

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SYMBOLS - Pre-Defined Symbols

******** DEVICE Directive Symbols
- used to establish device parameters
- multiple DEVICE statements allowed to accommodate parameters

Example:
DEVICE SX28L, OSCIN, BOR42
DEVICE TURBO, STACKX_OPTIONX, CARRYX, PROTECT

SX18L SX18L native mode (default: SX18L)
SX28L SX28L native mode

OSCHS3 = External crystal/resonator - high-speed level 3 (default: OSCHS3)
OSCHS2 = External crystal/resonator - high-speed level 2
OSCHS1 = External crystal/resonator - high-speed level 1
OSCXT2 = External crystal/resonator - standard level 2
OSCXT1 = External crystal/resonator - standard level 1
OSCLP2 = External crystal/resonator - low-power level 2
OSCLP1 = External crystal/resonator - low-power level 1
OSCIN = External clock input
OSCRC = External RC network
OSC4MHZ = Internal 4MHz oscillator
OSC1MHZ = Internal 1MHz oscillator
OSC128KHZ = Internal 128KHz oscillator
OSC32KHZ = Internal 32KHz oscillator
BOR42 = Brownout reset at VDD < 4.2V (default: Brownout off)
BOR26 = Brownout reset at VDD < 2.6V
BOR22 = Brownout reset at VDD < 2.2V

TURBO = Turbo mode enabled (1:1 execution) (default: 1:4 execution)
STACKX_OPTIONX = Stack is 8 levels, OPTION is 8 bits (default: Stack is 2 levels, OPTION is 6 bits)
CARRYX = ADD/SUB uses Carry flag (default: ADD/SUB ignores Carry flag)
SYNC = Input Syncing enabled - 2-clock delay on inputs (default: Input Syncing disabled)
WATCHDOG = Watchdog Timer enabled (default: Watchdog Timer disabled)
PROTECT = Code Protect enabled (default: Code Protect disabled)
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******** Dynamic Equates (always reflect current values)
% = Current REPT index (=0 if outside of a REPT block)
$ = Current origin

******** Register/Bit Equates

IND = $00   Indirect addressing register
RTCC = $01   RTCC register
WREG = $01   W register
PC = $02   Program counter low-byte register
STATUS = $03   Status register
C = STATUS.0 Carry bit  
DC = STATUS.1 Digit carry bit  
Z = STATUS.2 Zero bit  
PD = STATUS.3 Power-down bit  
TO = STATUS.4 Time-out bit  
PA0 = STATUS.5 Page preselect bit 0  
PA1 = STATUS.6 Page preselect bit 1  
PA2 = STATUS.7 Page preselect bit 2  
FSR = $04   File select register
RA = $05   RA i/o register
RB = $06   RB i/o register
RC = $07   RC i/o register

Hex Format:Low-byte/high-byte (8-bit) format used - byte counts and addresses are doubled.

$0000-$0FFF = CODE words
$1000-$100F = ID words (nibble-per-word used to make 8 characters)
$1010 = FUSE word
$1011 = FUSEX word

CONTENTS: to top of page

LABELS
OPERATORS
  Uniary
  Binary
  Conditional
DIRECTIVES
INSTRUCTIONS
  byte-oriented
  bit-oriented
  inc/dec-conditional branches
  compare-conditional branches
  bit-conditional branches
  unconditional branches
  i/o and control operations
SYMBOLS
  DEVICE_directives
  Dynamic Equates
  Register/Bit Equates To Assembly Language info page. ... To Prof. Wade's information page
file: /Techref/scenix/Assm_Mnem.htm, 139KB, , updated: 2002/1/10 15:17, local time: 2024/12/27 23:14,
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Quick, Easy and CHEAP! RCL-1 RS232 Level Converter in a DB9 backshell
Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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