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| author | Kartik Agaram <vc@akkartik.com> | 2021-02-03 09:49:40 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-02-03 09:49:40 -0800 |
| commit | 022ecb94f055a3f221092ee9ac2b5f842a83a912 (patch) | |
| tree | 2484033ba59c88734f162194d0ab35143a7f7016 /baremetal/boot.bochsrc | |
| parent | 7212178bc6cd2cf4bf8ab90eea5d43a89e2eec60 (diff) | |
| download | mu-022ecb94f055a3f221092ee9ac2b5f842a83a912.tar.gz | |
7684 - baremetal will have no mouse
I spent a week on trying to support it, and I am now past the five stages of grief. -- Important things I read https://web.archive.org/web/20040604041507/http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.html https://web.archive.org/web/20040604043149/http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/mouse/mouse.html https://wiki.osdev.org/index.php?title=Mouse_Input&oldid=23086#Waiting_to_Send_Bytes_to_Port_0x60_and_0x64 says command 0xa8 is optional SaniK: https://forum.osdev.org/viewtopic.php?t=10247 recommends command 0xa8 before setting Compaq Status byte Setting Compaq status byte before 0xa8: https://forum.osdev.org/viewtopic.php?f=1&t=19873 This thread also suggests that keeping reads from keyboard vs mouse straight is non-trivial. -- Where I got stuck Following SaniK's recipe doesn't seem to work. It seems like not sending the 0xa8 command gets us a little closer. I saw the mouse handler trigger, but it seems to not actually happen in response to mouse events (vector 0x74 in the interrupt descriptor table). -- Other options that may be worth considering USB mouse Serial mouse Implementing a PS/2 handler in SubX would require somehow referring to SubX labels in this file It seems clear that a mouse driver is complex enough to need a higher-level language than just hex bytes. But it's _not_ clear how to _explain_ a mouse driver. There's just a lot of random rules, historical anecdotes, just-so stories and sheer black magic here. I'm going to try to do without it all. Mu will be a keyboard-only computer for the foreseeable future.
Diffstat (limited to 'baremetal/boot.bochsrc')
| -rw-r--r-- | baremetal/boot.bochsrc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/baremetal/boot.bochsrc b/baremetal/boot.bochsrc index 4ddd2ca1..7745d972 100644 --- a/baremetal/boot.bochsrc +++ b/baremetal/boot.bochsrc @@ -1,7 +1,7 @@ -# Configuration for the Bochs x86 CPU emulator to run the output of baremetal/boot.hex +# Configuration for the Bochs x86 CPU emulator to run baremetal Mu programs # See baremetal/boot.hex for more details. ata0-master: type=disk, path="disk.img", mode=flat, cylinders=20, heads=16, spt=63 # 10MB, 512 bytes per sector boot: disk -mouse: enabled=1, toggle=ctrl+f10 +# PS/2 mouse requires black magic that I don't know how to explain. log: - |