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65816.js
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added absolute long indexed x addressing for operations that support it

This commit is contained in:
Preston Skupinski 2011-05-22 15:16:44 -04:00
parent 1b1193abbf
commit 382a4b1fc6
1 changed files with 223 additions and 0 deletions
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cpu.js
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@ -51,6 +51,7 @@ function CPU_65816() {
0x58 : CLI, 0xc2 : REP, 0xe2 : SEP, 0xd8 : CLD,
0xf8 : SED, 0xb8 : CLV, 0xeb : XBA, 0xa9 : LDA_const,
0xad : LDA_absolute, 0xaf : LDA_absolute_long,
0xbf : LDA_absolute_long_indexed_x,
0xa5 : LDA_direct_page, 0xbd : LDA_absolute_indexed_x,
0xb9 : LDA_absolute_indexed_y,
0xb2 : LDA_direct_page_indirect,
@ -68,6 +69,7 @@ function CPU_65816() {
0xac : LDY_absolute, 0xa4 : LDY_direct_page, 0xea : NOP,
0x8d : STA_absolute, 0x85 : STA_direct_page,
0x8f : STA_absolute_long,
0x9f : STA_absolute_long_indexed_x,
0x92 : STA_direct_page_indirect,
0x87 : STA_direct_page_indirect_long,
0x97 : STA_direct_page_indirect_long_indexed_y,
@ -96,6 +98,7 @@ function CPU_65816() {
0x50 : BVC, 0x70 : BVS, 0x10 : BPL, 0x30 : BMI,
0x69 : ADC_const, 0x6d : ADC_absolute,
0x6f : ADC_absolute_long,
0x7f : ADC_absolute_long_indexed_x,
0x65 : ADC_direct_page, 0x72 : ADC_direct_page_indirect,
0x67 : ADC_direct_page_indirect_long,
0x77 : ADC_direct_page_indirect_long_indexed_y,
@ -108,6 +111,7 @@ function CPU_65816() {
0xe9 : SBC_const,
0xed : SBC_absolute, 0xe5 : SBC_direct_page,
0xef : SBC_absolute_long,
0xff : SBC_absolute_long_indexed_x,
0xf2 : SBC_direct_page_indirect,
0xe7 : SBC_direct_page_indirect_long,
0xf7 : SBC_direct_page_indirect_long_indexed_y,
@ -120,6 +124,7 @@ function CPU_65816() {
0xc9 : CMP_const, 0xc5 : CMP_direct_page,
0xcd : CMP_absolute, 0xd2 : CMP_direct_page_indirect,
0xcf : CMP_absolute_long,
0xdf : CMP_absolute_long_indexed_x,
0xc7 : CMP_direct_page_indirect_long,
0xd7 : CMP_direct_page_indirect_long_indexed_y,
0xd5 : CMP_direct_page_indexed_x,
@ -134,6 +139,7 @@ function CPU_65816() {
0xc4 : CPY_direct_page, 0x29 : AND_const,
0x2d : AND_absolute, 0x25 : AND_direct_page,
0x2f : AND_absolute_long,
0x3f : AND_absolute_long_indexed_x,
0x32 : AND_direct_page_indirect,
0x27 : AND_direct_page_indirect_long,
0x37 : AND_direct_page_indirect_long_indexed_y,
@ -145,6 +151,7 @@ function CPU_65816() {
0x33 : AND_stack_relative_indirect_indexed_y,
0x09 : ORA_const, 0x0f : ORA_absolute_long,
0x0d : ORA_absolute, 0x05 : ORA_direct_page,
0x1f : ORA_absolute_long_indexed_x,
0x12 : ORA_direct_page_indirect,
0x07 : ORA_direct_page_indirect_long,
0x17 : ORA_direct_page_indirect_long_indexed_y,
@ -156,6 +163,7 @@ function CPU_65816() {
0x13 : ORA_stack_relative_indirect_indexed_y,
0x49 : EOR_const, 0x4d : EOR_absolute,
0x4f : EOR_absolute_long,
0x5f : EOR_absolute_long_indexed_x,
0x45 : EOR_direct_page,
0x52 : EOR_direct_page_indirect,
0x47 : EOR_direct_page_indirect_long,
@ -1330,6 +1338,32 @@ var EOR_absolute_long = {
}
};
var EOR_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
EOR_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
EOR_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var EOR_direct_page = {
bytes_required:function() {
return 2;
@ -1601,6 +1635,32 @@ var ORA_absolute_long = {
}
};
var ORA_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
ORA_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
ORA_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var ORA_direct_page = {
bytes_required:function() {
return 2;
@ -1872,6 +1932,32 @@ var AND_absolute_long = {
}
};
var AND_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
AND_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
AND_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var AND_direct_page = {
bytes_required:function() {
return 2;
@ -2408,6 +2494,32 @@ var CMP_absolute_long = {
}
};
var CMP_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
CMP_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
CMP_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var CMP_absolute_indexed_x = {
bytes_required:function() {
return 3;
@ -2615,6 +2727,32 @@ var SBC_absolute_long = {
}
};
var SBC_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
SBC_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
SBC_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var SBC_direct_page_indirect = {
bytes_required:function() {
return 2;
@ -2921,6 +3059,32 @@ var ADC_absolute_long = {
}
};
var ADC_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
ADC_const.execute(cpu, [cpu.mmu.read_byte_long(location, bytes[2])]);
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
ADC_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var ADC_direct_page = {
bytes_required:function() {
return 2;
@ -4745,6 +4909,32 @@ var STA_absolute_long = {
}
};
var STA_absolute_long_indexed_x = {
bytes_required: function() {
return 4;
},
execute: function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
location &= 0xffff;
bytes[2]++;
}
if(cpu.p.e|cpu.p.m) {
cpu.mmu.store_byte_long(location, bytes[2], cpu.r.a);
} else {
var high_byte = cpu.r.a >> 8;
var low_byte = cpu.r.a & 0x00ff;
cpu.mmu.store_byte_long(location, bytes[2], low_byte);
location++;
if(location & 0x10000) {
location &= 0xffff;
bytes[2]++;
}
cpu.mmu.store_byte_long(location, bytes[2], high_byte);
}
}
};
var STA_absolute = {
bytes_required: function() {
return 3;
@ -4901,6 +5091,39 @@ var LDA_absolute_long = {
}
};
var LDA_absolute_long_indexed_x = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = ((bytes[1]<<8)|bytes[0]) + cpu.r.x;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
if(cpu.p.e|cpu.p.m) {
cpu.r.a = cpu.mmu.read_byte_long(location, bytes[2]);
cpu.p.n = cpu.r.a >> 7;
} else {
var low_byte = cpu.mmu.read_byte_long(location, bytes[2]);
location++;
if(location & 0x10000) {
bytes[2]++;
location &= 0xffff;
}
var high_byte = cpu.mmu.read_byte_long(location, bytes[2]);
cpu.r.a = (high_byte<<8) | low_byte;
cpu.p.n = cpu.r.a >> 15;
}
if(cpu.r.a===0) {
cpu.p.z = 1;
} else {
cpu.p.z = 0;
}
}
};
var LDA_absolute = {
bytes_required: function() {
return 3;