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6ce85db45c
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67 Commits

Author SHA1 Message Date
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
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
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
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
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
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
omarandlorraine
61b8dfe1f2
add single_step function (#62) 
Co-authored-by: Sam M W <you@example.com>
 2023-03-27 00:27:44 +02:00
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
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
Sam M W
1d0fd6aad0 remove unused function dec_x 2022-10-21 06:37:41 +01:00
Sam M W
7500e8816e cargo clippy --fix 2022-10-21 06:34:42 +01:00
Sam M W
95731752ba using the associated function decrement 2022-10-21 06:33:51 +01:00
Sam M W
665ee4193d x and y are now unsigned and there's less casting all over 2022-10-20 09:42:17 +01:00
Sam M W
41b9b19be2 decrement_y_test passes 2022-10-20 09:32:51 +01:00
Sam M W
c406965560 decrement_x_test passes 2022-10-20 09:23:58 +01:00
Sam M W
1972a42adc some failing tests 2022-10-20 09:04:44 +01:00
Sam M W
894e4304ea test branch_across_end_of_address_space 2022-10-18 14:55:22 +01:00
Sam M W
3de8f9158d move tests and README away from Address 2022-10-18 10:01:55 +01:00
Sam M W
a3c4a7689f the program counter should wrap as well 2022-10-18 09:42:51 +01:00
Sam M W
7328eb416a misc clippy fixes. 2022-10-18 09:38:05 +01:00
Sam M W
4b26e83529 remove Address and AddressDiff from equation 2022-10-18 06:57:59 +01:00
omarandlorraine
f3d3bf470f
add option to statically disable decimal mode (#47) 
* add the decimal mode feature to `Cargo.toml`
* add tests for disabled decimal mode to github workflows
* don't run decimal mode tests if decimal mode disabled

Co-authored-by: Sam M W <you@example.com>
 2022-08-11 15:42:34 +02:00
Matthias
d1b1c93fd4 Fix clippy warnings 2022-06-07 19:52:00 +02:00
Matthias
363dc47755 Format code 2022-06-07 19:30:29 +02:00
omarandlorraine
ef9a49ac8b
set carry flag if carry_in && value == "$ff" (#44) 2022-06-07 11:03:51 +02:00
Matthias Endler
24973d7fbd Upgrade to Rust 2018 edition 2021-04-07 13:55:41 +02:00
Sam M W
34bbe55712 Add tests for stack over- and underflow 2021-01-30 15:10:41 +00:00