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191 Commits

Author SHA1 Message Date
Matthias Endler 467b3ff436
Code Cleanup (#97) 
This adds some new directives for clippy and fixes all warnings.
Also updated the dependencies to their latest versions.
 2024-04-27 19:51:39 +01:00
Sam M W 4847744518 correction to comment 2024-04-24 14:51:08 +01:00
Matthias Endler 11d9540729 fix typo 2024-04-24 15:41:25 +02:00
Sam M W bf06ad8924 better commenting inside of AddressingMode enum 2024-04-24 15:41:25 +02:00
Sam M W 54dd0cd536 rename IndirectWithFix to Indirect 2024-04-24 15:41:25 +02:00
Sam M W 2444ef52d1 fix typo in comment 2024-04-24 15:41:25 +02:00
Sam M W ad622bc930 formatting 2024-04-24 15:41:25 +02:00
Sam M W 97d6b3fd89 split the Indirect addressing mode into BuggyIndirect and IndirectWithFix 2024-04-24 15:41:25 +02:00
Sam M W da30c8c67d change arr_to_addr to address_from_bytes 2024-04-24 15:41:25 +02:00
omarandlorraine 11499b6bc8
Starting on implementing different variants (#88) 
* 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

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Co-authored-by: Sam M W <you@example.com>
 2023-10-31 16:45:15 +01:00
omarandlorraine b52e47bbb5
Fix the PHP opcode (#92) 
* unit test for php

* get test passing

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Co-authored-by: Sam M W <you@example.com>
 2023-10-30 02:22:37 +01:00
omarandlorraine 6ce85db45c
boring crate related maintenance (#95) 
* remove Cargo.lock

* remove num

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Co-authored-by: Sam M W <you@example.com>
 2023-10-30 02:20:46 +01:00
omarandlorraine 4d2621d603
use cargo test now instead of skeptic to run tests (#93) 
* use cargo test now instead of skeptic to run tests

* formatting

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Co-authored-by: Sam M W <you@example.com>
 2023-10-29 15:06:41 +00:00
omarandlorraine aa1a47a76f
Fix addition and subtraction (#72) 
* extract decimal logic into separate function

* squash me

* I think we should be doing unsigned arithmetic here

* squash me

* remove unused function

* update the sign checks

* cargo fmt

* get tests to compile again

* get tests passing again

* squash me

* remove pointless conversion from u8 to u8

* cargo fmt

* accumulator is now u8

* add adc test from solid65

* pass the new test

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Co-authored-by: Sam M W <you@example.com>
 2023-06-29 12:13:49 +02:00
omarandlorraine 849f891e24
Merge pull request #67 from mre/rts 
Implementation of RTS
 2023-04-16 07:08:25 +01:00
Sam M W bd1ab13dc1 point INY instruction at the correct register 2023-04-15 21:47:17 +01:00
Sam M W f0fc9829db PLA opcode should update the flags 2023-04-15 21:44:05 +01:00
Sam M W 26a2f51bc6 don't overshoot the stack pointer! (pla and plp) 2023-04-15 21:37:47 +01:00
Sam M W 62424070a1 disable interrupts after BRK instruction 2023-04-15 21:34:07 +01:00
Sam M W a8d53f926d implement BRK 2023-04-15 21:17:28 +01:00
Sam M W 1c31a73a2b correct endianness for program counter push 2023-04-15 21:01:08 +01:00
Sam M W 239992ea6c first stab at implementing the JSR instruction 2023-04-15 20:58:31 +01:00
Sam M W 70e85a2eaf bugfix for the bit opcode 2023-04-15 16:42:05 +01:00
Sam M W 8e797b70fa implement BNE 2023-04-15 16:17:51 +01:00
Sam M W 18164c7abf implement RTI as well 2023-04-15 15:36:53 +01:00
Sam M W 1b90243738 implementation of RTS 2023-04-15 15:36:43 +01:00
Sam M W 9f75d1a6b5 the get_byte method needs to take mutable reference to self 
the reson for this is it's possible for external hardware to have some
side effect on a read.
 2023-04-03 22:46:46 +01:00
Sam M W 26926a9feb set_byte method does not need to return old_value 2023-04-03 22:44:02 +01:00
Sam M W d2043dc6fb less verbosity, more expliciteness 2023-04-03 21:07:06 +01:00
Sam M W 7222388c5e get rid of silly xextend function; just use the .into() 2023-04-03 21:00:17 +01:00
Sam M W 3accd8ce40 as clippy suggests, convert from bool to u8/i8 2023-04-03 07:39:30 +01:00
Sam M W 672defd817 remove now dead code 2023-04-03 07:39:30 +01:00
Sam M W 0708a1084c fix the tests back up 2023-04-03 07:39:18 +01:00
Sam M W 12c901e8aa generic argument for CPU represents memory 2023-04-03 07:02:32 +01:00
Sam M W a8dac6e805 extract memory functionality into a trait 2023-04-03 06:59:40 +01:00
Sam M W f3f15de8cc remove memory.get_slice 
real hardware won't have the ability to dive in and grab a slice from
memory
 2023-04-03 05:50:13 +01:00
Sam M W 4254c02f55 Remove unit test test_memory_set_bytes 
This is the right thing to do because its pass depends on
zero-initilization. Real memory will not behave this way
 2023-04-03 05:50:13 +01:00
Sam M W 131b0f312d remove get_byte_mut_ref method from Memory 
This is the right thing to do, because the actual hardware will perform
a read and then perform a write. This could have observable side effects
on a real system
 2023-04-03 05:50:06 +01:00
Sam M W 766143d52f remove is_stack_address; it's never used 2023-04-02 21:21:46 +01:00
omarandlorraine 61b8dfe1f2
add single_step function (#62) 
Co-authored-by: Sam M W <you@example.com>
 2023-03-27 00:27:44 +02:00
dependabot[bot] fdf71425d3
Bump bitflags from 1.3.2 to 2.0.2 (#60) 
* Bump bitflags from 1.3.2 to 2.0.2

Bumps [bitflags](https://github.com/bitflags/bitflags) from 1.3.2 to 2.0.2.
- [Release notes](https://github.com/bitflags/bitflags/releases)
- [Changelog](https://github.com/bitflags/bitflags/blob/main/CHANGELOG.md)
- [Commits](https://github.com/bitflags/bitflags/compare/1.3.2...2.0.2)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Derive `Copy` and other traits for `Status`

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias <matthias-endler@gmx.net>
 2023-03-20 14:58:45 +01:00
Matthias Endler c3438c14e7
Make code more idiomatic (#61) 2023-03-20 14:11:44 +01:00
Sam M W c2e77b5f52 also test subtractions 2022-10-23 07:05:08 +01:00
Sam M W 2bcbfa63b5 fix panic 2022-10-23 07:05:04 +01:00
Sam M W bf543e2fbe add failing test 2022-10-23 07:04:52 +01:00
Sam M W 11e48c1691 add missing CLI instruction 2022-10-22 12:26:03 +01:00
omarandlorraine 32f925feb2
Merge branch 'master' into incdec 2022-10-21 09:10:18 +01:00
Sam M W f821dce70f do increments in the same way 2022-10-21 06:45:40 +01:00
Sam M W e4aebb9dfe cargo fmt 2022-10-21 06:42:27 +01:00
Sam M W 4e057a2a94 remove unused function `decrement_memory` 2022-10-21 06:40:56 +01:00