credit to ice guy, not me!!
this is ice guy's notes im using!

organixed on smwiki
http://www.smwiki.net/wiki/65c816_instructions

LDA -> Load Data to Accumulator. Load a value into the game. E.g. LDA #$2C or LDA $7E
STA -> Store whatever data was loaded into the Accumulator. E.g. STA $13CC
CMP -> CoMPare. Compare a value with A. E.g. LDA $14AF CMP $01
BEQ -> Branch if value in Accumulator is equal. Use a symbol right after it.
BNE -> Branch if value in Accumulator is not equal. Use a symbol right after it.
BCC -> Branch if value in Accumulator is less than or equal to what is compared. Use a symbol right after it.
BCS -> Branch if value in Accumulator is more than equal to what is compared. Use a symbol right after it.
BMI -> Branches if A is negative (80-FF).
BPL -> Branches if A is positive (00-7F).
BRA -> Always will branch, no matter what the values are. No CMP needed before it.
SEC -> Command used to subtract. Use SBC right after it.
SBC -> Right a value (in # or #$) to subtract it from the value in Accumulator.
CLC -> Command used to add. Use ADC right after it.
ADC -> Adds a certain amount to A (remember to use STA to store the new value).
INC -> Increase a value by one only.
DEC -> Decrease a value by one only.
STZ -> Set whatever address into it to zero. E.g. STZ $0DBF
TAX -> Put A into X
TAY -> Put A into Y
TXA -> Put X into A
TYA -> Put Y into A
TXY -> Put X into Y
TYX -> Put Y into X
JSL -> Jumps to a routine then follows whatever code is after it after the routine ends. RTL must be used here.
JSR -> Same as above, but RTS is used.
CPX -> Compare in the X register
CPY -> Compare in the Y register
RTL -> Used to end a code (after a JSL).
RTS -> Used to end a code (after a JSR).
REP -> Go into 16-bit mode.
SEP -> Go back into 8-bit mode.
INX -> Increment X by 1
INY -> Increment Y by 1
DEX -> Decrement X by 1
DEY -> Decrement Y by 1.
BRK -> Useless, crashes the ROM.
STP -> Freezes the game.
PLX -> Pull X
PLA -> Pull A
PLY -> Pull Y
PHX -> Push/Preserve X
PHY -> Push/Preserve Y
PHA -> Push/Preserve A
LDX -> Load into X
LDY -> Load into Y
STX -> Store into X
STY -> Store into Y
JSR -> Same as JSL, but RTS is used to end the code
JMP -> Jump to a label in the code (JMP label).
JML -> Same as JMP, but can branch if the address is in a different bank.
XBA -> Flips the value in A. (e.g if a = $1815 XBA makes it 1518).
ORA -> Used to set bits (e.g ORA #$80 sets the last bit) Also check if mutliple RAM Address are the same value (e.g. LDA $75 ORA $85 BEQ BothZero)
TSB - Much easier way of setting bits. LDA #$80 ;set bit 7 TSB $85 ; to RAM Address $85
TRB - Basically, the opposite of TSB. It will clear a bit. LDA #$80 TRB $1F2C will clear bit 8 of $1F2C.