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

This commit is contained in:
Preston Skupinski 2011-05-22 14:13:16 -04:00
parent e046787510
commit 1b1193abbf
1 changed files with 102 additions and 1 deletions
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103
cpu.js
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@ -95,6 +95,7 @@ function CPU_65816() {
0xf0 : BEQ, 0xd0 : BNE, 0x90 : BCC, 0xb0 : BCS,
0x50 : BVC, 0x70 : BVS, 0x10 : BPL, 0x30 : BMI,
0x69 : ADC_const, 0x6d : ADC_absolute,
0x6f : ADC_absolute_long,
0x65 : ADC_direct_page, 0x72 : ADC_direct_page_indirect,
0x67 : ADC_direct_page_indirect_long,
0x77 : ADC_direct_page_indirect_long_indexed_y,
@ -106,6 +107,7 @@ function CPU_65816() {
0x73 : ADC_stack_relative_indirect_indexed_y,
0xe9 : SBC_const,
0xed : SBC_absolute, 0xe5 : SBC_direct_page,
0xef : SBC_absolute_long,
0xf2 : SBC_direct_page_indirect,
0xe7 : SBC_direct_page_indirect_long,
0xf7 : SBC_direct_page_indirect_long_indexed_y,
@ -117,6 +119,7 @@ function CPU_65816() {
0xf3 : SBC_stack_relative_indirect_indexed_y,
0xc9 : CMP_const, 0xc5 : CMP_direct_page,
0xcd : CMP_absolute, 0xd2 : CMP_direct_page_indirect,
0xcf : CMP_absolute_long,
0xc7 : CMP_direct_page_indirect_long,
0xd7 : CMP_direct_page_indirect_long_indexed_y,
0xd5 : CMP_direct_page_indexed_x,
@ -130,6 +133,7 @@ function CPU_65816() {
0xc0 : CPY_const, 0xcc : CPY_absolute,
0xc4 : CPY_direct_page, 0x29 : AND_const,
0x2d : AND_absolute, 0x25 : AND_direct_page,
0x2f : AND_absolute_long,
0x32 : AND_direct_page_indirect,
0x27 : AND_direct_page_indirect_long,
0x37 : AND_direct_page_indirect_long_indexed_y,
@ -139,7 +143,7 @@ function CPU_65816() {
0x35 : AND_direct_page_indexed_x,
0x23 : AND_stack_relative,
0x33 : AND_stack_relative_indirect_indexed_y,
0x09 : ORA_const,
0x09 : ORA_const, 0x0f : ORA_absolute_long,
0x0d : ORA_absolute, 0x05 : ORA_direct_page,
0x12 : ORA_direct_page_indirect,
0x07 : ORA_direct_page_indirect_long,
@ -151,6 +155,7 @@ function CPU_65816() {
0x03 : ORA_stack_relative,
0x13 : ORA_stack_relative_indirect_indexed_y,
0x49 : EOR_const, 0x4d : EOR_absolute,
0x4f : EOR_absolute_long,
0x45 : EOR_direct_page,
0x52 : EOR_direct_page_indirect,
0x47 : EOR_direct_page_indirect_long,
@ -1309,6 +1314,22 @@ var EOR_absolute = {
}
};
var EOR_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
EOR_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var EOR_direct_page = {
bytes_required:function() {
return 2;
@ -1564,6 +1585,22 @@ var ORA_absolute = {
}
};
var ORA_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
ORA_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var ORA_direct_page = {
bytes_required:function() {
return 2;
@ -1819,6 +1856,22 @@ var AND_absolute = {
}
};
var AND_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
AND_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var AND_direct_page = {
bytes_required:function() {
return 2;
@ -2339,6 +2392,22 @@ var CMP_absolute = {
}
};
var CMP_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
CMP_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var CMP_absolute_indexed_x = {
bytes_required:function() {
return 3;
@ -2530,6 +2599,22 @@ var SBC_absolute = {
}
};
var SBC_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
SBC_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var SBC_direct_page_indirect = {
bytes_required:function() {
return 2;
@ -2820,6 +2905,22 @@ var ADC_absolute = {
}
};
var ADC_absolute_long = {
bytes_required:function() {
return 4;
},
execute:function(cpu, bytes) {
var location = (bytes[1]<<8)|bytes[0];
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]);
var high_byte = cpu.mmu.read_byte_long(location+1, bytes[2]);
ADC_const.execute(cpu, [low_byte, high_byte]);
}
}
};
var ADC_direct_page = {
bytes_required:function() {
return 2;