68HC16 REGISTER SET The following is a list of the 68HC16 registers used by AS6816: a,b - 8-bit accumulators d - 16-bit accumulator <a:b> e - 16-bit accumulator x,y,z - index registers k - address extension register s - stack pointer ccr - condition code 68HC16 INSTRUCTION SET The following tables list all 68HC16 mnemonics recognized by the AS6816 assembler. The designation [] refers to a required addressing mode argument. The following list specifies the format for each addressing mode supported by AS6816: #data immediate data byte or word data #xo,#yo local immediate data (mac / rmac) label branch label r register ccr,a,b,d,e,x,y,z,s ,x zero offset register indexed addressing ,x8 ,x16 offset,x register indexed addressing 0 <= offset <= 255 --- 8-bit -32768 <= offset <= -1 --- 16-bit 256 <= offset <= 32767 --- 16-bit (external definition of offset uses 16-bit mode) offset,x8 unsigned 8-bit offset indexed addressing offset,x16 signed 16-bit offset indexed addressing e,x accumulator offset indexed addressing ext extended addressing bank 64K bank number (jmp / jsr) The terms data, label, offset, bank, and ext may all be expres- sions. Note that not all addressing modes are valid with every in- struction, refer to the 6816 technical data for valid modes. Inherent Instructions aba abx aby abz ace aced ade adx ady adz aex aey aez bgnd cba daa ediv edivs emul emuls fdiv fmuls idiv ldhi lpstop mul nop psha pshb pshmac pula pulb pulmac rtr rts sba sde sted swi sxt tab tap tba tbek tbsk tbxk tbyk tbzk tde tdmsk tdp ted tedm tekb tem tmer tmet tmxed tpa tpd tskb tsx tsy tsz txkb txs txy txz tykb tys tyx tyz tzkb tzs tzx tzy wai xgab xgde xgdx xgdy xgdz xgex xgey xgez Push/Pull Multiple Register Instructions pshm r,... pulm r,... Short Branch Instructions bcc label bcs label beq label bge label bgt label bhi label bhis label bhs label ble label blo label blos label bls label blt label bmi label bne label bpl label bra label brn label bvc label bvs label bsr label Long Branch Instructions lbcc label lbcs label lbeq label lbge label lbgt label lbhi label lbhis label lbhs label lble label lblo label lblos label lbls label lblt label lbmi label lbne label lbpl label lbra label lbrn label lbvc label lbvs label lbsr label Bit Manipulation Instructions bclr [],#data bset [],#data brclr [],#data,label brset [],#data,label Single Operand Instructions asla aslb asld asle aslm asl [] aslw [] asra asrb asrd asre asrm asr [] asrw [] clra clrb clrd clre clrm clr [] clrw [] coma comb comd come com [] comw [] deca decb dec [] decw [] inca incb inc [] incw [] lsla lslb lsld lsle lslm lsl [] lslw [] lsra lsrb lsrd lsre lsr [] lsrw [] nega negb negd nege neg [] negw [] rola rolb rold role rol [] rolw [] rora rorb rord rore ror [] rorw [] tsta tstb tsta tste tst [] tstw [] Double Operand Instructions adca [] adcb [] adcd [] adce [] adda [] addb [] addd [] adde [] anda [] andb [] andd [] ande [] bita [] bitb [] cmpa [] cmpb [] cpd [] cpe [] eora [] eorb [] eord [] eore [] ldaa [] ldab [] ldd [] lde [] oraa [] orab [] ord [] ore [] sbca [] sbcb [] sbcd [] sbce [] staa [] stab [] std [] ste [] suba [] subb [] subd [] sube [] Index/Stack Register Instructions cps [] cpx [] cpy [] cpz [] lds [] ldx [] ldy [] ldz [] sts [] stx [] sty [] stz [] Jump and Jump to Subroutine Instructions jmp bank,[] jsr bank,[] Condition Code Register Instructions andp #data orp #data Multiply and Accumulate Instructions mac #data rmac #data mac #xo,#yo rmac #xo,#yo