From cec2dc2b9f2598cdf341627fe2ab91c37d637eac Mon Sep 17 00:00:00 2001 From: WlodekM Date: Wed, 2 Apr 2025 21:12:13 +0300 Subject: yea --- instructions/BRK.ts | 3 +++ instructions/JSR.ts | 3 ++- instructions/ROL.ts | 21 +++++++++++++++++++++ instructions/ROR.ts | 21 +++++++++++++++++++++ instructions/RTI.ts | 6 ++++++ instructions/RTS.ts | 5 +++++ instructions/SBC.ts | 11 +++++++++++ instructions/SEC.ts | 6 ++++++ 8 files changed, 75 insertions(+), 1 deletion(-) create mode 100644 instructions/ROL.ts create mode 100644 instructions/ROR.ts create mode 100644 instructions/RTI.ts create mode 100644 instructions/RTS.ts create mode 100644 instructions/SBC.ts create mode 100644 instructions/SEC.ts (limited to 'instructions') diff --git a/instructions/BRK.ts b/instructions/BRK.ts index 99e4072..419eeef 100644 --- a/instructions/BRK.ts +++ b/instructions/BRK.ts @@ -5,6 +5,9 @@ export default function (this: The65c02, mode: string) { case 'implied': this.io.interruptRequest.HI() //TODO: push shit onto stack + this.push(this.programCounter.num() & 0x00FF) + this.push(this.programCounter.num() & 0xFF00) + this.push(this.status.num()) this.io.data.set(this.programCounter.num() & 0x00FF) this.io.address.set(0xFFFF) this.write() diff --git a/instructions/JSR.ts b/instructions/JSR.ts index 59d95d8..5614d9b 100644 --- a/instructions/JSR.ts +++ b/instructions/JSR.ts @@ -2,6 +2,7 @@ import type The65c02 from "../65c02.ts"; export default function (this: The65c02, mode: string) { const location = this.getAddr(mode, ['absolute']); - this.push(this.programCounter.num()) + this.push(this.programCounter.num() & 0x00FF) + this.push(this.programCounter.num() & 0xFF00) this.programCounter.set(location) } \ No newline at end of file diff --git a/instructions/ROL.ts b/instructions/ROL.ts new file mode 100644 index 0000000..c76ef8b --- /dev/null +++ b/instructions/ROL.ts @@ -0,0 +1,21 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02, mode: string) { + if (mode == 'implicit') { + const mem = this.regA.num(); + const result = (mem << 1) | +this.carry; + this.negative = (result & 256) != 0 + this.carry = (mem & 256) != 0 + this.regA.set(result & 0xFF); + } else { + const addr = this.getAddr(mode) + this.io.address.set(addr); + this.read() + const mem = this.io.data.num(); + const result = (mem << 1) | +this.carry; + this.negative = (result & 256) != 0 + this.carry = (mem & 256) != 0 + this.io.data.set(result & 0xFF); + this.write() + } +} \ No newline at end of file diff --git a/instructions/ROR.ts b/instructions/ROR.ts new file mode 100644 index 0000000..7226604 --- /dev/null +++ b/instructions/ROR.ts @@ -0,0 +1,21 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02, mode: string) { + if (mode == 'implicit') { + const mem = this.regA.num(); + const result = (mem >> 1) | (this.carry ? 128 : 0); + this.negative = (result & 256) != 0 + this.carry = (mem & 256) != 0 + this.regA.set(result & 0xFF); + } else { + const addr = this.getAddr(mode) + this.io.address.set(addr); + this.read() + const mem = this.io.data.num(); + const result = (mem >> 1) | (this.carry ? 128 : 0); + this.negative = (result & 256) != 0 + this.carry = (mem & 256) != 0 + this.io.data.set(result & 0xFF); + this.write() + } +} \ No newline at end of file diff --git a/instructions/RTI.ts b/instructions/RTI.ts new file mode 100644 index 0000000..ab000b7 --- /dev/null +++ b/instructions/RTI.ts @@ -0,0 +1,6 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02) { + this.status.set(this.pop()) + this.programCounter.set(this.pop() | (this.pop() << 8)) +} \ No newline at end of file diff --git a/instructions/RTS.ts b/instructions/RTS.ts new file mode 100644 index 0000000..483a441 --- /dev/null +++ b/instructions/RTS.ts @@ -0,0 +1,5 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02) { + this.programCounter.set(this.pop() | (this.pop() << 8)) +} \ No newline at end of file diff --git a/instructions/SBC.ts b/instructions/SBC.ts new file mode 100644 index 0000000..b6840fb --- /dev/null +++ b/instructions/SBC.ts @@ -0,0 +1,11 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02, mode: string) { + const addr = this.getAddr(mode) + this.io.address.set(addr); + this.read() + const mem = this.io.data.num(); + const result = this.regA.num() - mem - (1-+this.carry) + this.flagZCN(result); + this.regA.set(result & 0xFF); +} \ No newline at end of file diff --git a/instructions/SEC.ts b/instructions/SEC.ts new file mode 100644 index 0000000..7572500 --- /dev/null +++ b/instructions/SEC.ts @@ -0,0 +1,6 @@ +import type The65c02 from "../65c02.ts"; + +export default function (this: The65c02) { + this.carry = true; + this.programCounter.increment(); +} \ No newline at end of file -- cgit 1.4.1-2-gfad0