Have better error messages on missing bios and firmware files

[liberodark]

Have build your project on linux.

But not running game is pokemon diamond

./nds-emulator test.nds 
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/main.rs:134:34
stack backtrace:
   0: rust_begin_unwind
             at /build/rust/src/rustc-1.52.1-src/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /build/rust/src/rustc-1.52.1-src/library/core/src/panicking.rs:92:14
   2: core::option::expect_none_failed
             at /build/rust/src/rustc-1.52.1-src/library/core/src/option.rs:1329:5
   3: core::result::Result<T,E>::unwrap
             at /build/rust/src/rustc-1.52.1-src/library/core/src/result.rs:1037:23
   4: nds_emulator::main::load_rom
             at /home/pc/Bureau/NDS-Emulator-master/src/main.rs:134:13
   5: nds_emulator::main
             at /home/pc/Bureau/NDS-Emulator-master/src/main.rs:76:19
   6: core::ops::function::FnOnce::call_once
             at /build/rust/src/rustc-1.52.1-src/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Ace314159]

You need to need to have the bios and firmware files named bios7.bin, bios9.bin, and firmware.bin.

I'll still keep this issue up since the error message should be nicer.

[liberodark]

Have test with bios in same folder :

./nds-emulator ./test.nds 
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/main.rs:136:34
stack backtrace:
   0: rust_begin_unwind
             at /build/rust/src/rustc-1.52.1-src/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /build/rust/src/rustc-1.52.1-src/library/core/src/panicking.rs:92:14
   2: core::option::expect_none_failed
             at /build/rust/src/rustc-1.52.1-src/library/core/src/option.rs:1329:5
   3: core::result::Result<T,E>::unwrap
             at /build/rust/src/rustc-1.52.1-src/library/core/src/result.rs:1037:23
   4: nds_emulator::main::load_rom
             at /home/pc/Bureau/NDS-Emulator-master/src/main.rs:136:13
   5: nds_emulator::main
             at /home/pc/Bureau/NDS-Emulator-master/src/main.rs:73:19
   6: core::ops::function::FnOnce::call_once
             at /build/rust/src/rustc-1.52.1-src/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Ace314159]

Currently, by default it expects those 3 files inside a ROMs subfolder.

[SpeckyYT]

I also had this problem, I fixed it by doing cargo build --release

r/lateresponses tho 💀