Macintosh-Tools/moa
1
0
Fork 0
mirror of https://github.com/transistorfet/moa.git synced 2024-12-21 20:29:22 +00:00
Code Issues Projects Releases Wiki Activity

Updated links to point to past commits

Browse Source
This commit is contained in:
transistor 2024-02-19 11:20:18 -08:00
parent 6a6ab426a6
commit 3965a95c8c
3 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
docs/posts/2021-11-making_an_emulator.md
View File

@ -396,7 +396,7 @@ than having a match arm for each of the 65536 combinations. There is a really h
GoldenCrystal](http://goldencrystal.free.fr/M68kOpcodes-v2.3.pdf) which shows the full breakdown of
opcodes for the 68000. We can look at the first 4 bits of the instruction word to separate it into
16 broad categories of instruction, and then further break it down from there. The full code can be
seen [here](https://github.com/transistorfet/moa/blob/main/src/cpus/m68k/decode.rs)
seen [here](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/src/cpus/m68k/decode.rs)
We can extend our `Instruction` type to contain more instructions, including the addressing modes
that the 68000 supports. A `MOVE` instruction for example can move data to or from a data or
@ -474,7 +474,7 @@ pub enum Instruction {
}
```
This is just an example of the instruction type definitions. The full code can be found
[here](https://github.com/transistorfet/moa/blob/main/src/cpus/m68k/instructions.rs). Note: it's
[here](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/src/cpus/m68k/instructions.rs). Note: it's
possible to express more combinations with these instruction types than there are legal instruction
combinations. Some combinations are illegal on the 68000 but allowed on the 68020 and up, which the
emulator supports using an enum to represent the different 68000 model numbers. Most of the error
@ -533,7 +533,7 @@ before writing data because the real MC68681 can't transmit fast enough to avoid
so as long as we return a value with those bits set, the software will write characters to the
`REG_TBA_WR` register. This example also shows the `REG_RBA_RD` register for reading serial data
in, but setting the `port_a_input` field is not shown for simplicity. The full code has be viewed
[here](https://github.com/transistorfet/moa/blob/main/src/peripherals/mc68681.rs)
[here](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/src/peripherals/mc68681.rs)
```rust
// Register Addresses (relative to mapped address)
@ -624,7 +624,7 @@ I originally implemented this using non-blocking input to check for a new charac
machine-end of the pseudoterm, and then storing it in a single byte in the MC68681 object, but I
later changed this to use a separate thread for polling, and `mpsc` channels to communicate with the
simulation thread. It's a bit too much code to include here but you can see the full tty
implementation [here](https://github.com/transistorfet/moa/blob/main/src/host/tty.rs)
implementation [here](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/src/host/traits.rs)
Box It Up

4
docs/posts/2022-01-emulating_the_sega_genesis_part2.md
View File

@ -243,9 +243,9 @@ There's not much to it. Only one window can be created at the moment, and input
supported. The threaded option is also not shown here. Before long, the code grew more
complicated, and now includes parsing of command line arguments with the `clap` crate. To see the
latest version, check out the [Genesis machine-specific
binary](https://github.com/transistorfet/moa/blob/main/frontends/moa-minifb/src/bin/moa-genesis.rs)
binary](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/frontends/moa-minifb/src/bin/moa-genesis.rs)
and the [MiniFB host impl and main
loop](https://github.com/transistorfet/moa/blob/main/frontends/moa-minifb/src/lib.rs)
loop](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/frontends/moa-minifb/src/lib.rs)
Updating Windows

2
docs/posts/2022-01-emulating_the_sega_genesis_part3.md
View File

@ -762,7 +762,7 @@ not pressed and 0 means it is). I also needed to reset the counter when the con
written to, for the count to be in sync with what the ROM was expecting. Not all ROMs progressed
through the entire count, if they only needed to read a few buttons. Eventually I got it sorted out
and buttons were working but it took a while to get them right. The latest code for the controllers
is [here](https://github.com/transistorfet/moa/blob/main/src/peripherals/genesis/controllers.rs)
is [here](https://github.com/transistorfet/moa/blob/c3951999771bbb56f45e1a8c5cd0b61758aed778/src/peripherals/genesis/controllers.rs)
Fixing Sprites