mirror of
https://github.com/mre/mos6502.git
synced 2024-09-25 05:54:52 +00:00
11499b6bc8
* start on separating 6502 variants from cpu itself
* add a single variant: the NMOS one
* get examples & tests running again
* Add the Revision A variant, one that has no ROR
* disable failing lint in build-time dependencies
* Variant with no decimal mode
* Revert "disable failing lint in build-time dependencies"
This reverts commit c87975e937.
* some doc comments
* specify the variant in unit test now the API has changed
---------
Co-authored-by: Sam M W <you@example.com>
49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
extern crate mos6502;
|
|
|
|
use mos6502::cpu;
|
|
use mos6502::instruction::Nmos6502;
|
|
use mos6502::memory::Bus;
|
|
use mos6502::memory::Memory;
|
|
|
|
fn main() {
|
|
println!("Enter two numbers (< 128) separated by a space to know their GCD.");
|
|
let mut input = String::new();
|
|
std::io::stdin().read_line(&mut input).unwrap();
|
|
|
|
let zero_page_data = input
|
|
.split_whitespace()
|
|
.map(|s| s.parse::<u8>().unwrap())
|
|
.collect::<Vec<u8>>();
|
|
|
|
let program = [
|
|
// (F)irst | (S)econd
|
|
// .algo
|
|
0xa5, 0x00, // Load from F to A
|
|
// .algo_
|
|
0x38, // Set carry flag
|
|
0xe5, 0x01, // Substract S from number in A (from F)
|
|
0xf0, 0x07, // Jump to .end if diff is zero
|
|
0x30, 0x08, // Jump to .swap if diff is negative
|
|
0x85, 0x00, // Load A to F
|
|
0x4c, 0x12, 0x00, // Jump to .algo_
|
|
// .end
|
|
0xa5, 0x00, // Load from S to A
|
|
0xff, // .swap
|
|
0xa6, 0x00, // load F to X
|
|
0xa4, 0x01, // load S to Y
|
|
0x86, 0x01, // Store X to F
|
|
0x84, 0x00, // Store Y to S
|
|
0x4c, 0x10, 0x00, // Jump to .algo
|
|
];
|
|
|
|
let mut cpu = cpu::CPU::new(Memory::new(), Nmos6502);
|
|
|
|
cpu.memory.set_bytes(0x00, &zero_page_data);
|
|
cpu.memory.set_bytes(0x10, &program);
|
|
cpu.registers.program_counter = 0x10;
|
|
|
|
cpu.run();
|
|
|
|
println!("GCD is {}", cpu.registers.accumulator);
|
|
}
|