mirror of https://github.com/mre/mos6502.git
Get some basic definitions and module structure going. Not sure whether Cargo.lock should be in .gitignore
This commit is contained in:
Johannes Muenzel
parent
9a81a48502
commit
b22b36bc2a
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Cargo.lock
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*.a
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*.aux
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*.bc
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# Copyright (C) 2014 The 6502-rs Developers
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the names of the copyright holders nor the names of any
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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[package]
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name = "6502-rs"
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version = "0.0.1"
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authors = ["The 6502-rs Developers"]
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[[bin]]
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name = "6502-rs"
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path = "src/exe/main.rs"
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[dependencies.defs6502]
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path="src/defs6502"
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# Copyright (C) 2014 The 6502-rs Developers
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the names of the copyright holders nor the names of any
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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[package]
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name = "defs6502"
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version = "0.0.1"
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authors = [ "The 6502-rs Developers" ]
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[lib]
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name = "defs6502"
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path = "lib.rs"
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// Copyright (C) 2014 The 6502-rs Developers
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the names of the copyright holders nor the names of any
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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pub use machine::ProcessorStatus;
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pub use machine::Machine;
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pub use machine::StackPointer;
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pub use machine::STACK_POINTER_IN_MEMORY_LO;
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pub use machine::STACK_POINTER_IN_MEMORY_HI;
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pub use machine::MemoryAddr;
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pub use machine::stack_pointer_to_addr;
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pub use machine::Instruction;
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pub use machine::AddressingMode;
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mod machine;
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// Copyright (C) 2014 The 6502-rs Developers
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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||||
// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the names of the copyright holders nor the names of any
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// Abbreviations
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//
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// Registers
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//
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// A accumulator
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// X general purpose register
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// Y general purpose register
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// SP stack pointer
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// NV-BDIZC processor status flags -- see ProcessorStatus bitflags
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// PC program counter
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//
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// M stands for `Memory location`
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pub bitflags! {
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flags ProcessorStatus: u8 {
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static N = 0b10000000, // Negative
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static V = 0b01000000, // oVerflow
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static B = 0b00010000, // Brk
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static D = 0b00001000, // Decimal mode active?
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static I = 0b00000100, // Irq disabled?
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static Z = 0b00000010, // Zero
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static C = 0b00000001, // Carry
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}
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}
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pub struct Machine {
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A : u8,
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X : u8,
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Y : u8,
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SP : u8,
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P : ProcessorStatus,
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PC : u16,
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}
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impl Machine {
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pub fn new() -> Machine {
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Machine { A: 0, X: 0, Y: 0, SP: 0, P: ProcessorStatus::empty(), PC: 0 }
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}
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}
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pub struct StackPointer(u8);
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pub static STACK_POINTER_IN_MEMORY_LO : u16 = 0x0100;
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pub static STACK_POINTER_IN_MEMORY_HI : u16 = 0x01FF;
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pub struct MemoryAddr(u16);
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pub fn stack_pointer_to_addr(StackPointer(x) : StackPointer) -> MemoryAddr
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{
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MemoryAddr(x as u16 + STACK_POINTER_IN_MEMORY_HI)
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}
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#[deriving(Show)]
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pub enum Instruction
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// out in
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{ ADC // ADd with Carry................ A,Z,C,N = A + M + C
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, AND // logical AND................... A,Z,N = A && M
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, ASL // Arithmetic Shift Left......... A,Z,C,N = M << 1
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, BCC // Branch if Carry Clear......... _ <-
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, BCS // Branch if Carry Set...........
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, BEQ // Branch if Equal...............
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, BIT // BIT test...................... a &
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, BMI // Branch if Minus...............
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, BNE // Branch if Not Equal...........
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, BPL // Branch if Positive............
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, BRK // BReaK.........................
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, BVC // Branch if oVerflow Clear......
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, BVS // Branch if oVerflow Set........
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, CLC // CLear Carry flag..............
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, CLD // Clear Decimal Mode............
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, CLI // Clear Interrupt Disable.......
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, CLV // Clear oVerflow flag...........
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, CMP // Compare.......................
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, CPX // Compare X register............
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, CPY // Compare Y register............
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, DEC // DECrement memory..............
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, DEX // DEcrement X register..........
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, DEY // DEcrement Y register..........
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, EOR // Exclusive OR..................
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, INC // INCrement memory..............
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, INX // INcrement X register..........
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, INY // INcrement Y register..........
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, JMP // JuMP..........................
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, JSR // Jump to SubRoutine............
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, LDA // LoaD Accumulator..............
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, LDX // LoaD X register...............
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, LDY // LoaD Y register...............
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, LSR // Logical Shift Right...........
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, NOP // No OPeration..................
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, ORA // inclusive OR..................
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, PHA // PusH Accumulator..............
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, PHP // PusH Processor status.........
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, PLA // PuLl Accumulator..............
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, PLP // PuLl Processor status.........
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, ROL // ROtate Left...................
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, ROR // ROtate Right..................
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, RTI // ReTurn from Interrupt.........
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, RTS // ReTurn from Subroutine........
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, SBC // SuBtract with Carry...........
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, SEC // SEt Carry flag................
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, SED // SEt Decimal flag..............
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, SEI // SEt Interrupt disable.........
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, STA // STore Accumulator.............
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, STX // STore X register..............
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, STY // STore Y register..............
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, TAX // Transfer Accumulator to X.....
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, TAY // Transfer Accumulator to Y.....
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, TSX // Transfer Stack pointer to X...
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, TXA // Transfer X to Accumulator.....
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, TXS // Transfer X to Stack pointer...
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, TYA // Transfer Y to Accumulator.....
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}
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pub enum AddressingMode {
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Immediate,
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Absolute,
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ZeroPage,
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Implied,
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IndirectAbsolute,
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AbsoluteIndexedX,
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AbsoluteIndexedY,
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ZeroPageIndexedX,
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ZeroageIndexedY,
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IndexedIndirect,
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IndirectIndexed,
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Relative,
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Accumulator,
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}
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@ -0,0 +1,37 @@
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// Copyright (C) 2014 The 6502-rs Developers
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the names of the copyright holders nor the names of any
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// contributors may be used to endorse or promote products derived from this
|
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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extern crate defs6502;
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use defs6502::Machine;
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fn main() {
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let _q = Machine::new();
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println!("Hello, 6502?");
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}
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