tools.nes/lib/xixanta/src/opcodes.rs, branch main

Fix the opcode for the 'sed' instruction

2026-08-17T21:07:03Z

Signed-off-by: Miquel Sabaté Solà

Add the runrom crate and the vnf library

2026-08-17T21:06:23Z

The vnf library supports the runrom crate and they both combined enable users to "run" a ROM file. This is basically an emulator, but with two key differences: 1. It is to be run programatically. That is, you are not expected to play games with this, but to run code by steps, start at a given address, run a function, etc. 2. It is headless: there are no graphics displayed on screen, nor sound being delivered. Thus, the target for both these things are developers, not players. This way developers can validate code paths without needing a full blown emulator. You can write tests with this and be able to run some checks as part of your testing infrastructure. Signed-off-by: Miquel Sabaté Solà

readrom: implement the -d/--disassemble option

2026-07-15T20:11:50Z

This option can also be coupled with -n/--nasm-directory, and you can then get a human-readable disassembling of any proc or label you might be thinking on. Signed-off-by: Miquel Sabaté Solà

Add the .min and the .max control expressions

2026-04-24T21:12:51Z

Signed-off-by: Miquel Sabaté Solà

Add a big endian control statement

2026-04-24T20:29:47Z

By default everything is little endian, and that should always be the case. That being said, if a literal is better expressed in big endian format for whatever reason, you can now use the .be or the .bigendian control statements. The terribly named .dbyt control statement can also be used for this purpose, but that's just to be compatible with the implementation from ca65. Signed-off-by: Miquel Sabaté Solà

Add the .version pseudo-variable

2026-04-24T14:26:08Z

Signed-off-by: Miquel Sabaté Solà

Change .fallthrough to fallthrough

2026-02-02T22:22:47Z

Implementing it as a control statement has the bad thing that it's impossible to be compatible with other assemblers such as ca65, as you cannot create dummy control statements or something like that in there. Instead of that, we define it with the special underscores which are still valid for identifiers, and give a "compiler-specific thingie" flair to it. This also has the benefit that the parser can be a bit more strict. Signed-off-by: Miquel Sabaté Solà

Add the .fallthrough control statement

2026-02-02T21:38:16Z

This is exclusive to 'nasm' and it allows the developer to explicitly tell the assembler than a "fall through" condition is actually desired: it's not a mistake. This comes in two flavors. The first, without arguments, just makes this explicit without much enforcement. The second allows you to pass an argument which is the name of the function or label you are expecting to fall through. The assembler will error out if the fall through address is not the expected one, hence telling the programmer whenever the fall through condition they thought in the past is no longer true (e.g. the function has moved somewhere else in the code). Signed-off-by: Miquel Sabaté Solà

Drop lazy_static dependency

2025-01-22T21:38:33Z

Apparently the standard library had LazyLock which is enough for what I wanted to achieve with lazy_static. Signed-off-by: Miquel Sabaté Solà

Implement echo control statements

2025-01-22T21:22:46Z

Signed-off-by: Miquel Sabaté Solà

tools.nes/lib/xixanta/src/opcodes.rs, branch main

Fix the opcode for the 'sed' instruction

Add the runrom crate and the vnf library

readrom: implement the -d/--disassemble option

Add the .min and the .max control expressions

Add a big endian control statement

Add the .version pseudo-variable

Change .fallthrough to __fallthrough__

Add the .fallthrough control statement

Drop lazy_static dependency

Implement echo control statements

Change .fallthrough to fallthrough