diff options
Diffstat (limited to 'trunk/src/emu/cpu/mcs51/mcs51ops.c')
-rw-r--r-- | trunk/src/emu/cpu/mcs51/mcs51ops.c | 980 |
1 files changed, 980 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/mcs51/mcs51ops.c b/trunk/src/emu/cpu/mcs51/mcs51ops.c new file mode 100644 index 00000000000..7cbaf78575c --- /dev/null +++ b/trunk/src/emu/cpu/mcs51/mcs51ops.c @@ -0,0 +1,980 @@ +/******************************************************************************************* + NOTE: All registers are accessed directly, instead of using the SFR_R() function for speed + Direct register access is availabe from the R_(register name) macros.. ex: ACC for the ACC + with the exception of the PC +********************************************************************************************/ + +//ACALL code addr /* 1: aaa1 0001 */ +OPHANDLER( acall ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab code address byte + PUSH_PC(); //Save PC to the stack + //Thanks Gerrit for help with this! :) + PC = (PC & 0xf800) | ((r & 0xe0) << 3) | addr; +} + +//ADD A, #data /* 1: 0010 0100 */ +OPHANDLER( add_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 result = ACC + data; //Add data to accumulator + DO_ADD_FLAGS(ACC,data,0); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADD A, data addr /* 1: 0010 0101 */ +OPHANDLER( add_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + UINT8 result = ACC + data; //Add data to accumulator + DO_ADD_FLAGS(ACC,data,0); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADD A, @R0/@R1 /* 1: 0010 011i */ +OPHANDLER( add_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from memory pointed to by R0 or R1 + UINT8 result = ACC + data; //Add data to accumulator + DO_ADD_FLAGS(ACC,data,0); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADD A, R0 to R7 /* 1: 0010 1rrr */ +OPHANDLER( add_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + UINT8 result = ACC + data; //Add data to accumulator + DO_ADD_FLAGS(ACC,data,0); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADDC A, #data /* 1: 0011 0100 */ +OPHANDLER( addc_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 result = ACC + data + GET_CY; //Add data + carry flag to accumulator + DO_ADD_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADDC A, data addr /* 1: 0011 0101 */ +OPHANDLER( addc_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + UINT8 result = ACC + data + GET_CY; //Add data + carry flag to accumulator + DO_ADD_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADDC A, @R0/@R1 /* 1: 0011 011i */ +OPHANDLER( addc_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from memory pointed to by R0 or R1 + UINT8 result = ACC + data + GET_CY; //Add data + carry flag to accumulator + DO_ADD_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//ADDC A, R0 to R7 /* 1: 0011 1rrr */ +OPHANDLER( addc_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + UINT8 result = ACC + data + GET_CY; //Add data + carry flag to accumulator + DO_ADD_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//AJMP code addr /* 1: aaa0 0001 */ +OPHANDLER( ajmp ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab code address byte + //Thanks Gerrit for help with this! :) + PC = (PC & 0xf800) | ((r & 0xe0) << 3) | addr; +} + +//ANL data addr, A /* 1: 0101 0010 */ +OPHANDLER( anl_mem_a ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,data & ACC); //Set data address value to it's value Logical AND with ACC +} + +//ANL data addr, #data /* 1: 0101 0011 */ +OPHANDLER( anl_mem_byte ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 srcdata = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,srcdata & data); //Set data address value to it's value Logical AND with Data +} + +//ANL A, #data /* 1: 0101 0100 */ +OPHANDLER( anl_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + SET_ACC(ACC & data); //Set ACC to value of ACC Logical AND with Data +} + +//ANL A, data addr /* 1: 0101 0101 */ +OPHANDLER( anl_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + SET_ACC(ACC & data); //Set ACC to value of ACC Logical AND with Data +} + +//ANL A, @RO/@R1 /* 1: 0101 011i */ +OPHANDLER( anl_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from address R0 or R1 points to + SET_ACC(ACC & data); //Set ACC to value of ACC Logical AND with Data +} + +//ANL A, RO to R7 /* 1: 0101 1rrr */ +OPHANDLER( anl_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + SET_ACC(ACC & data); //Set ACC to value of ACC Logical AND with Data +} + +//ANL C, bit addr /* 1: 1000 0010 */ +OPHANDLER( anl_c_bitaddr ) +{ + int cy = GET_CY; + UINT8 addr = ROP_ARG(PC++); //Grab bit address + UINT8 bit = BIT_R(addr); //Grab bit data from bit address + SET_CY( (cy & bit) ); //Set Carry flag to Carry Flag Value Logical AND with Bit +} + +//ANL C,/bit addr /* 1: 1011 0000 */ +OPHANDLER( anl_c_nbitaddr ) +{ + int cy = GET_CY; + UINT8 addr = ROP_ARG(PC++); //Grab bit address + UINT8 bit = BIT_R(addr); //Grab bit data from bit address + bit = ((~bit)&1); //Complement bit + SET_CY( (cy & bit) ); //Set Carry flag to Carry Flag Value Logical AND with Complemented Bit +} + +//CJNE A, #data, code addr /* 1: 1011 0100 */ +OPHANDLER( cjne_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + + if(ACC != data) //Jump if values are not equal + { + PC = PC + rel_addr; + } + + //Set carry flag to 1 if 1st compare value is < 2nd compare value + SET_CY( (ACC < data) ); +} + +//CJNE A, data addr, code addr /* 1: 1011 0101 */ +OPHANDLER( cjne_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + UINT8 data = IRAM_R(addr); //Pull value from data address + + if(ACC != data) //Jump if values are not equal + { + PC = PC + rel_addr; + } + + //Set carry flag to 1 if 1st compare value is < 2nd compare value + SET_CY( (ACC < data) ); +} + +//CJNE @R0/@R1, #data, code addr /* 1: 1011 011i */ +OPHANDLER( cjne_ir_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + UINT8 srcdata = IRAM_IR(R_REG(r)); //Grab value pointed to by R0 or R1 + + if(srcdata != data) //Jump if values are not equal + { + PC = PC + rel_addr; + } + + //Set carry flag to 1 if 1st compare value is < 2nd compare value + SET_CY( (srcdata < data) ); +} + +//CJNE R0 to R7, #data, code addr /* 1: 1011 1rrr */ +OPHANDLER( cjne_r_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + UINT8 srcdata = R_REG(r); //Grab value of R0 - R7 + + if(srcdata != data) //Jump if values are not equal + { + PC = PC + rel_addr; + } + + //Set carry flag to 1 if 1st compare value is < 2nd compare value + SET_CY( (srcdata < data) ); +} + +//CLR bit addr /* 1: 1100 0010 */ +OPHANDLER( clr_bitaddr ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + BIT_W(addr,0); //Clear bit at specified bit address +} + +//CLR C /* 1: 1100 0011 */ +OPHANDLER( clr_c ) +{ + SET_CY(0); //Clear Carry Flag +} + +//CLR A /* 1: 1110 0100 */ +OPHANDLER( clr_a ) +{ + SET_ACC(0); //Clear Accumulator +} + +//CPL bit addr /* 1: 1011 0010 */ +OPHANDLER( cpl_bitaddr ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + UINT8 data = (~BIT_R(addr))&1; + BIT_W(addr,data); //Complement bit at specified bit address +} + +//CPL C /* 1: 1011 0011 */ +OPHANDLER( cpl_c ) +{ + UINT8 bit = (~GET_CY)&1; //Complement Carry Flag + SET_CY(bit); +} + +//CPL A /* 1: 1111 0100 */ +OPHANDLER( cpl_a ) +{ + UINT8 data = ((~ACC)&0xff); + SET_ACC(data); //Complement Accumulator +} + +//DA A /* 1: 1101 0100 */ +OPHANDLER( da_a ) +{ +/*From several sources, since none said the same thing: + The decimal adjust instruction is associated with the use of the ADD and ADDC instructions. + The eight-bit value in the accumulator is adjusted to form two BCD digits of four bits each. + If the accumulator contents bits 0-3 are greater than 9, OR the AC flag is set, then six is added to + produce a proper BCD digit. + If the carry is set, OR the four high bits 4-7 exceed nine, six is added to the value of these bits. + The carry flag will be set if the result is > 0x99, but not cleared otherwise */ + + UINT16 new_acc = ACC & 0xff; + if(GET_AC || (new_acc & 0x0f) > 0x09) + new_acc += 0x06; + if(GET_CY || ((new_acc & 0xf0) > 0x90) || (new_acc & ~0xff)) + new_acc += 0x60; + SET_ACC(new_acc&0xff); + if(new_acc & ~0xff) + SET_CY(1); +} + +//DEC A /* 1: 0001 0100 */ +OPHANDLER( dec_a ) +{ + SET_ACC(ACC-1); +} + +//DEC data addr /* 1: 0001 0101 */ +OPHANDLER( dec_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); + IRAM_W(addr,data-1); +} + +//DEC @R0/@R1 /* 1: 0001 011i */ +OPHANDLER( dec_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); + IRAM_W(R_REG(r),data-1); +} + +//DEC R0 to R7 /* 1: 0001 1rrr */ +OPHANDLER( dec_r ) +{ + SET_REG(r, R_REG(r) - 1); +} + +//DIV AB /* 1: 1000 0100 */ +OPHANDLER( div_ab ) +{ + if( B == 0 ) { + //Overflow flag is set! + SET_OV(1); + //Really the values are undefined according to the manual, but we'll just leave them as is.. + //SET_ACC(0xff); + //SFR_W(B,0xff); + } + else { + int a = (int)ACC / B; + int b = (int)ACC % B; + //A gets quotient byte, B gets remainder byte + SET_ACC(a); + B = b; + //Overflow flag is cleared + SET_OV(0); + } + //Carry Flag is always cleared + SET_CY(0); +} + +//DJNZ data addr, code addr /* 1: 1101 0101 */ +OPHANDLER( djnz_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + IRAM_W(addr,IRAM_R(addr) - 1); //Decrement value contained at data address + if(IRAM_R(addr) != 0) //Branch if contents of data address is not 0 + { + PC = PC + rel_addr; + } +} + +//DJNZ R0 to R7,code addr /* 1: 1101 1rrr */ +OPHANDLER( djnz_r ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + SET_REG(r ,R_REG(r) - 1); //Decrement value + if(R_REG(r) != 0) //Branch if contents of R0 - R7 is not 0 + { + PC = PC + rel_addr; + } +} + +//INC A /* 1: 0000 0100 */ +OPHANDLER( inc_a ) +{ + SET_ACC(ACC+1); +} + +//INC data addr /* 1: 0000 0101 */ +OPHANDLER( inc_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); + IRAM_W(addr,data+1); +} + +//INC @R0/@R1 /* 1: 0000 011i */ +OPHANDLER( inc_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); + IRAM_W(R_REG(r),data+1); +} + +//INC R0 to R7 /* 1: 0000 1rrr */ +OPHANDLER( inc_r ) +{ + UINT8 data = R_REG(r); + SET_REG(r, data + 1); +} + +//INC DPTR /* 1: 1010 0011 */ +OPHANDLER( inc_dptr ) +{ + UINT16 dptr = (DPTR)+1; + SET_DPTR(dptr); +} + +//JB bit addr, code addr /* 1: 0010 0000 */ +OPHANDLER( jb ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(BIT_R(addr)) //If bit set at specified bit address, jump + { + PC = PC + rel_addr; + } +} + +//JBC bit addr, code addr /* 1: 0001 0000 */ +OPHANDLER( jbc ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(BIT_R(addr)) { //If bit set at specified bit address, jump + PC = PC + rel_addr; + BIT_W(addr,0); //Clear Bit also + } +} + +//JC code addr /* 1: 0100 0000 */ +OPHANDLER( jc ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(GET_CY) //Jump if Carry Flag Set + { + PC = PC + rel_addr; + } +} + +//JMP @A+DPTR /* 1: 0111 0011 */ +OPHANDLER( jmp_iadptr ) +{ + PC = ACC + DPTR; +} + +//JNB bit addr, code addr /* 1: 0011 0000 */ +OPHANDLER( jnb ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(!BIT_R(addr)) //If bit NOT set at specified bit address, jump + { + PC = PC + rel_addr; + } +} + +//JNC code addr /* 1: 0101 0000 */ +OPHANDLER( jnc ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(!GET_CY) //Jump if Carry Flag not set + { + PC = PC + rel_addr; + } +} + +//JNZ code addr /* 1: 0111 0000 */ +OPHANDLER( jnz ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(ACC != 0) //Branch if ACC is not 0 + { + PC = PC+rel_addr; + } +} + +//JZ code addr /* 1: 0110 0000 */ +OPHANDLER( jz ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + if(ACC == 0) //Branch if ACC is 0 + { + PC = PC+rel_addr; + } +} + +//LCALL code addr /* 1: 0001 0010 */ +OPHANDLER( lcall ) +{ + UINT8 addr_hi, addr_lo; + addr_hi = ROP_ARG(PC++); + addr_lo = ROP_ARG(PC++); + PUSH_PC(); + PC = (UINT16)((addr_hi<<8) | addr_lo); +} + +//LJMP code addr /* 1: 0000 0010 */ +OPHANDLER( ljmp ) +{ + UINT8 addr_hi, addr_lo; + addr_hi = ROP_ARG(PC++); + addr_lo = ROP_ARG(PC++); + PC = (UINT16)((addr_hi<<8) | addr_lo); +} + +//MOV A, #data /* 1: 0111 0100 */ +OPHANDLER( mov_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + SET_ACC(data); //Store data to ACC +} + +//MOV A, data addr /* 1: 1110 0101 */ +OPHANDLER( mov_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + SET_ACC(IRAM_R(addr)); //Store contents of data address to ACC +} + +//MOV A,@RO/@R1 /* 1: 1110 011i */ +OPHANDLER( mov_a_ir ) +{ + SET_ACC(IRAM_IR(R_REG(r))); //Store contents of address pointed by R0 or R1 to ACC +} + +//MOV A,R0 to R7 /* 1: 1110 1rrr */ +OPHANDLER( mov_a_r ) +{ + SET_ACC(R_REG(r)); //Store contents of R0 - R7 to ACC +} + +//MOV data addr, #data /* 1: 0111 0101 */ +OPHANDLER( mov_mem_byte ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = ROP_ARG(PC++); //Grab data + IRAM_W(addr,data); //Store data to data address location +} + +//MOV data addr, data addr /* 1: 1000 0101 */ +OPHANDLER( mov_mem_mem ) +{ + //1st address is src, 2nd is dst, but the mov command works as mov dst,src) + UINT8 src,dst; + src = ROP_ARG(PC++); //Grab source data address + dst = ROP_ARG(PC++); //Grab destination data address + IRAM_W(dst,IRAM_R(src)); //Read source address contents and store to destination address +} + +//MOV @R0/@R1, #data /* 1: 0111 011i */ +OPHANDLER( mov_ir_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + IRAM_IW(R_REG(r),data); //Store data to address pointed by R0 or R1 +} + +//MOV R0 to R7, #data /* 1: 0111 1rrr */ +OPHANDLER( mov_r_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + SET_REG(r, data); //Store to R0 - R7 +} + +//MOV data addr, @R0/@R1 /* 1: 1000 011i */ +OPHANDLER( mov_mem_ir ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + IRAM_W(addr,IRAM_IR(R_REG(r))); //Store contents pointed to by R0 or R1 to data address +} + +//MOV data addr,R0 to R7 /* 1: 1000 1rrr */ +OPHANDLER( mov_mem_r ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + IRAM_W(addr,R_REG(r)); //Store contents of R0 - R7 to data address +} + +//MOV DPTR, #data16 /* 1: 1001 0000 */ +OPHANDLER( mov_dptr_byte ) +{ + UINT8 data_hi, data_lo; + data_hi = ROP_ARG(PC++); //Grab hi byte + data_lo = ROP_ARG(PC++); //Grab lo byte + SET_DPTR((UINT16)((data_hi<<8)|data_lo)); //Store to DPTR +} + +//MOV bit addr, C /* 1: 1001 0010 */ +OPHANDLER( mov_bitaddr_c ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + BIT_W(addr,GET_CY); //Store Carry Flag to Bit Address +} + +//MOV @R0/@R1, data addr /* 1: 1010 011i */ +OPHANDLER( mov_ir_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + IRAM_IW(R_REG(r),IRAM_R(addr)); //Store data from data address to address pointed to by R0 or R1 +} + +//MOV R0 to R7, data addr /* 1: 1010 1rrr */ +OPHANDLER( mov_r_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + SET_REG(r, IRAM_R(addr)); //Store to R0 - R7 +} + +//MOV data addr, A /* 1: 1111 0101 */ +OPHANDLER( mov_mem_a ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + IRAM_W(addr,ACC); //Store A to data address +} + +//MOV @R0/@R1, A /* 1: 1111 011i */ +OPHANDLER( mov_ir_a ) +{ + IRAM_IW(R_REG(r),ACC); //Store A to location pointed to by R0 or R1 +} + +//MOV R0 to R7, A /* 1: 1111 1rrr */ +OPHANDLER( mov_r_a ) +{ + SET_REG(r, ACC); //Store A to R0-R7 +} + +//MOVC A, @A + PC /* 1: 1000 0011 */ +OPHANDLER( movc_a_iapc ) +{ + UINT8 data; + data = CODEMEM_R(ACC+PC); //Move a byte from CODE(Program) Memory and store to ACC + SET_ACC(data); +} + +//MOV C, bit addr /* 1: 1010 0010 */ +OPHANDLER( mov_c_bitaddr ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + SET_CY( (BIT_R(addr)) ); //Store Bit from Bit Address to Carry Flag +} + +//MOVC A, @A + DPTR /* 1: 1001 0011 */ +OPHANDLER( movc_a_iadptr ) +{ + UINT8 data; + data = CODEMEM_R(ACC + DPTR); //Move a byte from CODE(Program) Memory and store to ACC + SET_ACC(data); +} + +//MOVX A,@DPTR /* 1: 1110 0000 */ +//(Move External Ram 16 bit address to A) +OPHANDLER( movx_a_idptr ) +{ +// UINT8 byte = DATAMEM_R(R_DPTR); //Grab 1 byte from External DATA memory pointed to by dptr + UINT32 addr = ERAM_ADDR(DPTR, 0xFFFF); + UINT8 byte = DATAMEM_R(addr); //Grab 1 byte from External DATA memory pointed to by dptr + SET_ACC(byte); //Store to ACC +} + +//MOVX A, @R0/@R1 /* 1: 1110 001i */ +//(Move External Ram 8 bit address to A) +OPHANDLER( movx_a_ir ) +{ + UINT32 addr = ERAM_ADDR(R_REG(r),0xFF); //Grab address by reading location pointed to by R0 or R1 + UINT8 byte = DATAMEM_R(addr); //Grab 1 byte from External DATA memory pointed to by address + SET_ACC(byte); //Store to ACC +} + +//MOVX @DPTR,A /* 1: 1111 0000 */ +//(Move A to External Ram 16 bit address) +OPHANDLER( movx_idptr_a ) +{ +// DATAMEM_W(R_DPTR, ACC); //Store ACC to External DATA memory address pointed to by DPTR + UINT32 addr = ERAM_ADDR(DPTR, 0xFFFF); + DATAMEM_W(addr, ACC); //Store ACC to External DATA memory address pointed to by DPTR +} + +//MOVX @R0/@R1,A /* 1: 1111 001i */ +//(Move A to External Ram 8 bit address) +OPHANDLER( movx_ir_a ) +{ + UINT32 addr = ERAM_ADDR(R_REG(r),0xFF); //Grab address by reading location pointed to by R0 or R1 + DATAMEM_W(addr, ACC); //Store ACC to External DATA memory address +} + +//MUL AB /* 1: 1010 0100 */ +OPHANDLER( mul_ab ) +{ + UINT16 result = ACC * B; + //A gets lo bits, B gets hi bits of result + B = (UINT8) ((result & 0xFF00) >> 8); + SET_ACC((UINT8)(result & 0x00FF)); + //Set flags + SET_OV( ((result & 0x100) >> 8) ); //Set/Clear Overflow Flag if result > 255 + SET_CY(0); //Carry Flag always cleared +} + +//NOP /* 1: 0000 0000 */ +OPHANDLER( nop ) +{ +} + +//ORL data addr, A /* 1: 0100 0010 */ +OPHANDLER( orl_mem_a ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,data | ACC); //Set data address value to it's value Logical OR with ACC +} + +//ORL data addr, #data /* 1: 0100 0011 */ +OPHANDLER( orl_mem_byte ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 srcdata = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,srcdata | data); //Set data address value to it's value Logical OR with Data +} + +//ORL A, #data /* 1: 0100 0100 */ +OPHANDLER( orl_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + SET_ACC(ACC | data); //Set ACC to value of ACC Logical OR with Data +} + +//ORL A, data addr /* 1: 0100 0101 */ +OPHANDLER( orl_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + SET_ACC(ACC | data); //Set ACC to value of ACC Logical OR with Data +} + +//ORL A, @RO/@R1 /* 1: 0100 011i */ +OPHANDLER( orl_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from address R0 or R1 points to + SET_ACC(ACC | data); //Set ACC to value of ACC Logical OR with Data +} + +//ORL A, RO to R7 /* 1: 0100 1rrr */ +OPHANDLER( orl_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + SET_ACC(ACC | data); //Set ACC to value of ACC Logical OR with Data +} + +//ORL C, bit addr /* 1: 0111 0010 */ +OPHANDLER( orl_c_bitaddr ) +{ + int cy = GET_CY; + UINT8 addr = ROP_ARG(PC++); //Grab bit address + UINT8 bit = BIT_R(addr); //Grab bit data from bit address + SET_CY( (cy | bit) ); //Set Carry flag to Carry Flag Value Logical OR with Bit +} + +//ORL C, /bit addr /* 1: 1010 0000 */ +OPHANDLER( orl_c_nbitaddr ) +{ + int cy = GET_CY; + UINT8 addr = ROP_ARG(PC++); //Grab bit address + UINT8 bit = BIT_R(addr); //Grab bit data from bit address + bit = ((~bit)&1); //Complement bit + SET_CY( (cy | bit) ); //Set Carry flag to Carry Flag Value Logical OR with Complemented Bit +} + +//POP data addr /* 1: 1101 0000 */ +OPHANDLER( pop ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + IRAM_W(addr, IRAM_IR(SP)); //Store to contents of data addr, data pointed to by Stack - IRAM_IR needed to access upper 128 bytes of stack + //IRAM_IW(addr, IRAM_IR(R_SP)); //Store to contents of data addr, data pointed to by Stack - doesn't work, sfr's are not restored this way and it's not an indirect access anyway + SP = SP-1; //Decrement SP +} + +//PUSH data addr /* 1: 1100 0000 */ +OPHANDLER( push ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 tmpSP = SP+1; //Grab and Increment Stack Pointer + SP = tmpSP; // "" + IRAM_IW(tmpSP, IRAM_R(addr)); //Store to stack contents of data address - IRAM_IW needed to store to upper 128 bytes of stack, however, can't use IRAM_IR because that won't store the sfrs and it's not an indirect access anyway +} + +//RET /* 1: 0010 0010 */ +OPHANDLER( ret ) +{ + POP_PC(); +} + +//RETI /* 1: 0011 0010 */ +OPHANDLER( reti ) +{ + POP_PC(); + CLEAR_CURRENT_IRQ(); +} + +//RL A /* 1: 0010 0011 */ +OPHANDLER( rl_a ) +{ + //Left Shift A, Bit 7 carries to Bit 0 + int carry = ((ACC & 0x80) >> 7); + int data = (ACC<<1) & 0xfe; + SET_ACC( data | carry); +} + +//RLC A /* 1: 0011 0011 */ +OPHANDLER( rlc_a ) +{ + //Left Shift A, Bit 7 goes to Carry Flag, Original Carry Flag goes to Bit 0 of ACC + int carry = ((ACC & 0x80) >> 7); + int data = ((ACC<<1) & 0xfe) | GET_CY; + SET_ACC( data); + SET_CY(carry); +} + +//RR A /* 1: 0000 0011 */ +OPHANDLER( rr_a ) +{ + //Right Shift A, Bit 0 carries to Bit 7 + int carry = ((ACC & 1) << 7); + int data = (ACC>>1) & 0x7f; + SET_ACC( data | carry); +} + +//RRC A /* 1: 0001 0011 */ +OPHANDLER( rrc_a ) +{ + //Right Shift A, Bit 0 goes to Carry Flag, Bit 7 of ACC gets set to original Carry Flag + int carry = (ACC & 1); + int data = ((ACC>>1) & 0x7f) | (GET_CY<<7); + SET_ACC( data); + SET_CY(carry); +} + +//SETB C /* 1: 1101 0011 */ +OPHANDLER( setb_c ) +{ + SET_CY(1); //Set Carry Flag +} + +//SETB bit addr /* 1: 1101 0010 */ +OPHANDLER( setb_bitaddr ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab bit address + BIT_W(addr,1); //Set Bit at Bit Address +} + +//SJMP code addr /* 1: 1000 0000 */ +OPHANDLER( sjmp ) +{ + INT8 rel_addr = ROP_ARG(PC++); //Grab relative code address + PC = PC + rel_addr; //Update PC +} + +//SUBB A, #data /* 1: 1001 0100 */ +OPHANDLER( subb_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 result = ACC - data - GET_CY; //Subtract data & carry flag from accumulator + DO_SUB_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC + +} + +//SUBB A, data addr /* 1: 1001 0101 */ +OPHANDLER( subb_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + UINT8 result = ACC - data - GET_CY; //Subtract data & carry flag from accumulator + DO_SUB_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//SUBB A, @R0/@R1 /* 1: 1001 011i */ +OPHANDLER( subb_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from memory pointed to by R0 or R1 + UINT8 result = ACC - data - GET_CY; //Subtract data & carry flag from accumulator + DO_SUB_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//SUBB A, R0 to R7 /* 1: 1001 1rrr */ +OPHANDLER( subb_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + UINT8 result = ACC - data - GET_CY; //Subtract data & carry flag from accumulator + DO_SUB_FLAGS(ACC,data,GET_CY); //Set Flags + SET_ACC(result); //Store 8 bit result of addtion in ACC +} + +//SWAP A /* 1: 1100 0100 */ +OPHANDLER( swap_a ) +{ + UINT8 a_nib_lo, a_nib_hi; + a_nib_hi = (ACC & 0x0f) << 4; //Grab lo byte of ACC and move to hi + a_nib_lo = (ACC & 0xf0) >> 4; //Grab hi byte of ACC and move to lo + SET_ACC( a_nib_hi | a_nib_lo); +} + +//XCH A, data addr /* 1: 1100 0101 */ +OPHANDLER( xch_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data + UINT8 oldACC = ACC; //Hold value of ACC + SET_ACC(data); //Sets ACC to data + IRAM_W(addr,oldACC); //Sets data address to old value of ACC +} + +//XCH A, @RO/@R1 /* 1: 1100 011i */ +OPHANDLER( xch_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data pointed to by R0 or R1 + UINT8 oldACC = ACC; //Hold value of ACC + SET_ACC(data); //Sets ACC to data + IRAM_W(R_REG(r),oldACC); //Sets data address to old value of ACC +} + +//XCH A, RO to R7 /* 1: 1100 1rrr */ +OPHANDLER( xch_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0-R7 + UINT8 oldACC = ACC; //Hold value of ACC + SET_ACC(data); //Sets ACC to data + SET_REG(r, oldACC); //Sets data address to old value of ACC +} + +//XCHD A, @R0/@R1 /* 1: 1101 011i */ +OPHANDLER( xchd_a_ir ) +{ + UINT8 acc, ir_data; + ir_data = IRAM_IR(R_REG(r)); //Grab data pointed to by R0 or R1 + acc = ACC; //Grab ACC value + SET_ACC( (acc & 0xf0) | (ir_data & 0x0f) ); //Set ACC to lower nibble of data pointed to by R0 or R1 + IRAM_W(R_REG(r), (ir_data & 0xf0) | (acc & 0x0f) ); //Set data pointed to by R0 or R1 to lower nibble of ACC +} + +//XRL data addr, A /* 1: 0110 0010 */ +OPHANDLER( xrl_mem_a ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,data ^ ACC); //Set data address value to it's value Logical XOR with ACC +} + +//XRL data addr, #data /* 1: 0110 0011 */ +OPHANDLER( xrl_mem_byte ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = ROP_ARG(PC++); //Grab data + UINT8 srcdata = IRAM_R(addr); //Grab data from data address + IRAM_W(addr,srcdata ^ data); //Set data address value to it's value Logical XOR with Data +} + +//XRL A, #data /* 1: 0110 0100 */ +OPHANDLER( xrl_a_byte ) +{ + UINT8 data = ROP_ARG(PC++); //Grab data + SET_ACC(ACC ^ data); //Set ACC to value of ACC Logical XOR with Data +} + +//XRL A, data addr /* 1: 0110 0101 */ +OPHANDLER( xrl_a_mem ) +{ + UINT8 addr = ROP_ARG(PC++); //Grab data address + UINT8 data = IRAM_R(addr); //Grab data from data address + SET_ACC(ACC ^ data); //Set ACC to value of ACC Logical XOR with Data +} + +//XRL A, @R0/@R1 /* 1: 0110 011i */ +OPHANDLER( xrl_a_ir ) +{ + UINT8 data = IRAM_IR(R_REG(r)); //Grab data from address R0 or R1 points to + SET_ACC(ACC ^ data); //Set ACC to value of ACC Logical XOR with Data +} + +//XRL A, R0 to R7 /* 1: 0110 1rrr */ +OPHANDLER( xrl_a_r ) +{ + UINT8 data = R_REG(r); //Grab data from R0 - R7 + SET_ACC(ACC ^ data); //Set ACC to value of ACC Logical XOR with Data +} + +//illegal opcodes +OPHANDLER( illegal ) +{ + LOG(("i8051 '%s': illegal opcode at 0x%03x: %02x\n", mcs51_state->device->tag(), PC-1, r)); +} |