| Commit message (Collapse) | Author | Age | Files | Lines |
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This was tedious for three reasons beyond the usual one of having to
track and update offsets several time while I debug:
- The Bochs troubles of the previous commit kept polluting my brain
even though they were irrelevant.
- I had to keep some changes locally to allow myself to use Bochs,
which polluted my working directory.
- I had to travel the long way to the realization that I'm not
actually initializing the stack anywhere. BIOS was starting my stack
off at 0x10000, which was promptly clobbered by my second read from
disk.
The good news: while I'm here I grow the interrupt descriptor table. So
I don't have to go through this exercise when I get back to supporting
the mouse.
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https://en.wikipedia.org/wiki/GNU_Unifont#The_.hex_font_format
http://unifoundry.com/unifont/index.html
Since GNU Unifont is covered under the GPL v2, so I believe is this repo.
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If it's large enough that I have doubts whether my top-of-the-line Mac
is showing the bottom of the screen inside an emulator, it's too large.
This way I also feel more confident that most modern hardware will support
this graphics mode, and that these programs will work for others.
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We need a few pages of data for the keyboard mappings.
If I moved them to some later address I'd be able to keep the nice round
starting address unchanged. But that seems like a superficial aesthetic
concern. There's really no value in having an array of hex bytes represented
in SubX rather than just raw hex. And it's better to colocate data near
the handler code which uses it (and which runs instructions SubX doesn't
support).
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Design choice: all programs will use a graphics mode (1280x1024) with 256
colors. That should be fairly widely available. (It turns out text modes
larger than 80x25 are not widely available even among modern emulators.
Mu will need fonts sooner rather than later.)
Mu will never try to be smart and do things like autodetect your hardware.
We _will_ help you modify Mu for your hardware.
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