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Author SHA1 Message Date
Matthias
2c65fe7e1b Fix SBC implementation and improve overflow detection 
- Correct decimal mode subtraction in SBC operation
- Implement accurate overflow detection for non-decimal mode
- Fix carry flag calculation as inverse of borrow
- Add comments explaining complex bit manipulation for overflow detection
- Update tests to verify correct behavior in both decimal and non-decimal modes

This commit addresses issues with the Subtract with Carry (SBC) operation,
ensuring correct behavior in both decimal and non-decimal modes, and
improves code readability with added comments.
 2024-10-18 21:01:06 +02:00
Sam M W
6b7c8a8aab bump version 2024-09-26 09:04:18 +02:00
Sam M W
0c8616acb0 impl Default for CPU 2024-09-26 09:04:18 +02:00
Sam M W
874422b394 impl Default for the Variant types 2024-09-26 09:04:18 +02:00
Sam M W
40710248ff #[allow(clippy::needless_doctest_main)] 2024-07-29 13:13:07 +02:00
Sam M W
dbbb4a5ccf remove lint for pointer_structural_match, this is now a hard error 2024-07-29 13:13:07 +02:00
Sam M W
b052f9150f version bump 2024-07-29 13:13:07 +02:00
omarandlorraine
265ef6941e
Cmos support (#99) 2024-06-07 15:29:40 +01:00
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

---------

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

---------

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

---------

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

---------

Co-authored-by: Sam M W <you@example.com>
 2023-10-29 15:06:41 +00:00
Sam M W
a07df31c26 Cargo update 2023-10-29 13:47:51 +00:00
omarandlorraine
0d65eb0d8d
Merge pull request #87 from omarandlorraine/update 
cargo update
 2023-08-18 09:07:20 +01:00
Sam M W
9752a1b8f7 cargo update 2023-08-18 09:02:16 +01:00
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

---------

Co-authored-by: Sam M W <you@example.com>
 2023-06-29 12:13:49 +02:00
dependabot[bot]
65817524a2
Bump bitflags from 2.3.2 to 2.3.3 (#82) 
Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.3.2 to 2.3.3.
- [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/2.3.2...2.3.3)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-patch
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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-06-29 10:52:01 +02:00
Matthias Endler
e88c971625
Add assembly example code (#80) 
* Add assembly example code

This should make it easier for beginners to understand
how to test this emulator.

* cleanup

* fix typo
 2023-06-20 10:32:28 +02:00
dependabot[bot]
62d4b73cd5
Bump log from 0.4.17 to 0.4.19 (#78) 
Bumps [log](https://github.com/rust-lang/log) from 0.4.17 to 0.4.19.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/compare/0.4.17...0.4.19)

---
updated-dependencies:
- dependency-name: log
  dependency-type: direct:production
  update-type: version-update:semver-patch
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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-06-19 12:45:50 +02:00
dependabot[bot]
4266599bb2
Bump bitflags from 2.2.1 to 2.3.2 (#79) 
Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.2.1 to 2.3.2.
- [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/2.2.1...2.3.2)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-minor
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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-06-19 11:56:09 +02:00
omarandlorraine
42eb1f8689
Update README.md (#74) 2023-04-26 18:41:44 +02:00
dependabot[bot]
36a9dd19f6
Bump bitflags from 2.1.0 to 2.2.1 (#73) 
Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.1.0 to 2.2.1.
- [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/2.1.0...2.2.1)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-minor
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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-04-25 10:45:54 +02:00
Matthias Endler
2effe45a08
Add CI pipeline (#71) 2023-04-20 17:42:18 +02:00
Matthias
56001dc63b Add missing updated lockfile 2023-04-20 14:22:03 +02:00
Matthias
1a3d07861b Bump devel version to 0.5.0 2023-04-20 13:22:13 +02:00
dependabot[bot]
c08e8ac595
Bump bitflags from 2.1.0 to 2.2.0 (#69) 
Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.1.0 to 2.2.0.
- [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/2.1.0...2.2.0)

---
updated-dependencies:
- dependency-name: bitflags
  dependency-type: direct:production
  update-type: version-update:semver-minor
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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-04-20 10:49:59 +02:00
omarandlorraine
849f891e24
Merge pull request #67 from mre/rts 
Implementation of RTS
 2023-04-16 07:08:25 +01:00
omarandlorraine
6232b3bdbd
Merge pull request #68 from mre/bit 
bugfix for the bit opcode
 2023-04-15 22:05:54 +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
dependabot[bot]
7df9160e32
Bump bitflags from 2.0.2 to 2.1.0 (#65) 
Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.0.2 to 2.1.0.
- [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/2.0.2...2.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
 2023-04-13 10:58:07 +02:00
omarandlorraine
99ae3d55e0
Merge pull request #63 from mre/memory_trait 
Tease memory handling apart from the CPU
 2023-04-05 05:23:25 +01:00