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* 7474Kartik Agaram2020-12-291-1/+1
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* 7473Kartik Agaram2020-12-294-1/+240
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* 7472Kartik Agaram2020-12-292-0/+102
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* 7471Kartik Agaram2020-12-292-2/+9
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* 7470Kartik Agaram2020-12-291-7/+7
| | | | | | | The ol' 8-byte-register-names issue strikes again. There's no way to access the lower 8 bits of ESI. There's still a bug in baremetal/ex2.mu; it's printing transposed somehow.
* 7469 - first working baremetal Mu programKartik Agaram2020-12-295-0/+104
| | | | | It doesn't _quite_ do what it should, so this is more precisely the first _buggy_ baremetal Mu program. But the tooling works, at least.
* 7468Kartik Agaram2020-12-294-55/+59
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* 7467Kartik Agaram2020-12-292-1/+7
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* 7466Kartik Agaram2020-12-292-2/+2
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* 7465Kartik Agaram2020-12-291-4/+3
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* 7464Kartik Agaram2020-12-293-0/+178
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* 7463Kartik Agaram2020-12-291-3/+2
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* 7462 - SubX version of baremetal/ex2.subxKartik Agaram2020-12-293-1/+36
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* 7461Kartik Agaram2020-12-297-13/+14
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* 7460 - baremetal backend for SubXKartik Agaram2020-12-294-2178/+263
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* 7459Kartik Agaram2020-12-292-102/+199
| | | | Bring baremetal variant up to date with recent changes.
* 7458Kartik Agaram2020-12-292-90/+184
| | | | Switch survey_elf to the new approach.
* 7457Kartik Agaram2020-12-282-10/+14
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* 7456Kartik Agaram2020-12-281-2/+1
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* 7455Kartik Agaram2020-12-281-2/+15
| | | | | | | | | | New approach to disambiguating /disp32 arguments: based on opcodes rather than metadata. I interpret /disp32 as PC-relative in a short list of instructions. Otherwise it's absolute if it gets a label. There should be no reason to pass labels into /disp8 or /disp16.
* 7454Kartik Agaram2020-12-285-341/+119
| | | | Go back to commit 7448.
* 7453Kartik Agaram2020-12-281-74/+23
| | | | | Snapshot: this approach of disambiguating /disp32 based on metadata doesn't work. The `survey` phase runs after `pack`, which gets rid of most metadata.
* 7452Kartik Agaram2020-12-284-24/+286
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* 7451Kartik Agaram2020-12-284-20/+28
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* 7450Kartik Agaram2020-12-282-2/+2
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* 7449Kartik Agaram2020-12-281-0/+3
| | | | | | | | | | | | | | | | | | | | There's an ambiguity in how x86 interprets disp32 fields: - For jumps and calls they're displacements from the starting address of the next instruction. So far so good. - However, when the ModR/M requires them they can also be absolute addresses. Ideally I'd take the presence of the ModR/M byte into account in interpreting them. However, it's easier to assume relative addressing only for labels in the code segment. This commit raises an error if we ever refer to labels in the code segment in instructions with a ModR/M byte. (I'm assuming that no instruction with a ModR/M byte will ever use a displacement without the ModR/M byte requiring it.)
* 7448Kartik Agaram2020-12-282-0/+18
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* 7447Kartik Agaram2020-12-282-2/+2
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* 7446Kartik Agaram2020-12-282-185/+0
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* 7445Kartik Agaram2020-12-282-185/+0
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* 7444Kartik Agaram2020-12-281-1/+1
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* 7443Kartik Agaram2020-12-284-0/+4802
| | | | | A new phase for baremetal compilations. Doesn't work yet, but it passes all its tests, so we can add it to CI.
* 7442Kartik Agaram2020-12-283-0/+10
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* 7441Kartik Agaram2020-12-2816-16/+16
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* 7440Kartik Agaram2020-12-282-18/+18
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* 7439 - start translating Mu programs to baremetalKartik Agaram2020-12-2810-19/+19
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* 7438Kartik Agaram2020-12-283-244/+600
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* 7437 - baremetal: draw pixel on keyboard eventKartik Agaram2020-12-282-7/+68
| | | | | It's now clear that our keyboard handler doesn't trigger after the first event.
* 7436Kartik Agaram2020-12-272-22/+22
| | | | Start highlighting lines that may need to be recomputed when offsets change.
* 7435 - baremetal: buffer for keyboard eventsKartik Agaram2020-12-271-20/+49
| | | | | | | | | I'm trying to read the status register, but I'm still not seeing the breakpoint being hit a second time. (And I again ran into the Bochs bug that breakpoints at the first instruction of an interrupt handler don't work.) Maybe this is just a debugger issue. Let's keep going, and try to start using the keyboard events.
* 7434Kartik Agaram2020-12-271-1/+1
| | | | Fix a stale displacement.
* 7433 - some major layout changesKartik Agaram2020-12-272-55/+51
| | | | | | I'd missed that VBE call 0x4f01 (get video mode) can write up to 256 bytes. Unexpected areas were getting clobbered because I wasn't reserving enough space.
* 7432Kartik Agaram2020-12-271-5/+5
| | | | | Bugfix: 32-bit code in 16-bit mode. Seems like it was benign, maybe.
* 7431Kartik Agaram2020-12-271-1/+1
| | | | Typo.
* 7430Kartik Agaram2020-12-271-1/+1
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* 7429Kartik Agaram2020-12-272-0/+7
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* 7428Kartik Agaram2020-12-278-555/+0
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* 7427Kartik Agaram2020-12-274-4/+4
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* 7426Kartik Agaram2020-12-273-57/+154
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* 7425 - baremetal: render the paletteKartik Agaram2020-12-271-6/+5
| | | | | It's now very obvious that we don't actually have 256 unique colors by default in 256-color graphics modes.
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