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| * | example demonstrating disk access | Kartik K. Agaram | 2021-03-23 | 1 | -0/+51 | |
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| * | bochs support for disk drives | Kartik K. Agaram | 2021-03-23 | 2 | -0/+24 | |
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| * | . | Kartik K. Agaram | 2021-03-23 | 1 | -125/+132 | |
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| * | reorg boot.subx | Kartik K. Agaram | 2021-03-23 | 1 | -10/+9 | |
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| * | mouse support that requires polling | Kartik K. Agaram | 2021-03-23 | 5 | -15/+271 | |
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| * | get rid of unnecessary padding | Kartik K. Agaram | 2021-03-23 | 1 | -115/+2 | |
| | | | | | Now we only specify addresses where it matters. | |||||
| * | . | Kartik K. Agaram | 2021-03-23 | 1 | -3/+5 | |
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| * | . | Kartik Agaram | 2021-03-23 | 1 | -4/+3 | |
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| * | . | Kartik Agaram | 2021-03-23 | 1 | -2/+2 | |
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| * | . | Kartik Agaram | 2021-03-23 | 276 | -83028/+85954 | |
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| * | writes to disk now working | Kartik K. Agaram | 2021-03-23 | 3 | -0/+93 | |
| | | | | | | | Tested by inserting a call into the shell, but we can't leave it in because every test ends up clobbering the disk. So it's now time to think about a testable interface for the disk. | |||||
| * | transfer only 16 bits at a time | Kartik K. Agaram | 2021-03-22 | 1 | -8/+3 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 1 | -3/+20 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 1 | -4/+5 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 3 | -14/+12 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 1 | -1/+0 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 1 | -1/+1 | |
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| * | . | Kartik K. Agaram | 2021-03-22 | 1 | -1/+1 | |
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| * | shell: gracefully handle missing data disk | Kartik K. Agaram | 2021-03-22 | 2 | -13/+73 | |
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| * | shell: read initial expression from secondary disk | Kartik K. Agaram | 2021-03-21 | 6 | -11/+62 | |
| | | | | | See shell/README.md for (extremely klunky) instructions. | |||||
| * | . | Kartik K. Agaram | 2021-03-21 | 1 | -3/+3 | |
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| * | snapshot: reading secondary drive also works | Kartik K. Agaram | 2021-03-21 | 1 | -3/+1 | |
| | | | | | | | | | | | | | dd if=/dev/zero of=data.img count=20160 echo '(+ 1 1)' |dd of=data.img conv=notrunc ./translate ex2.mu && qemu-system-i386 -hda disk.img -hdb data.img Compare output with `xxd data.img |head`. This works because primary and secondary drives on the primary bus share the same ports. All we have to do is select the right drive by flipping a bit. | |||||
| * | snapshot: reading from disk without BIOS!! | Kartik K. Agaram | 2021-03-21 | 3 | -0/+216 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both LBA and CHS coordinates are now working for the primary disk on the primary bus. Failure modes I ran into: - ATA ports are 16-bit values. Using instructions with 8-bit immediates will yield strange results. (I had to debug this twice because I missed poll-ata-primary-bus-primary-drive-regular-status-word the first time around.) Mu's toolchain has been found out here. bootstrap has good errors but doesn't support the instructions I need in boot.subx. The self-hosted phases support the instructions but provide no error-checking. Might be worth starting to add error-checking as I encounter the need. In this case, a vote for validating metadata sizes even if we don't validate that instructions pass in the right metadata sizes. - Can't poll readiness first thing. Maybe we need to always select the drive first. - Reading 8-bit values from a 16-bit port (data port 0x1f0) returns garbage. Reading 32-bit values however works totally fine; go figure. (Maybe it won't work on real hardware?) https://forum.osdev.org/viewtopic.php?t=36415 - Passing in a 0 segment will never return data. | |||||
| * | . | Kartik K. Agaram | 2021-03-21 | 1 | -15/+15 | |
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| * | . | Kartik K. Agaram | 2021-03-21 | 1 | -3/+3 | |
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| * | typo; thanks waterhouse | Kartik K. Agaram | 2021-03-21 | 1 | -1/+1 | |
| | | | | | https://news.ycombinator.com/item?id=26525349#26529192 | |||||
| * | . | Kartik K. Agaram | 2021-03-18 | 1 | -2/+2 | |
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| * | . | Kartik Agaram | 2021-03-17 | 1 | -25/+25 | |
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| * | . | Kartik K. Agaram | 2021-03-16 | 1 | -1/+1 | |
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| * | . | Kartik K. Agaram | 2021-03-16 | 1 | -1/+4 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -1/+1 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 11 | -15/+21 | |
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| * | undo previous commit | Kartik K. Agaram | 2021-03-15 | 2 | -15/+0 | |
| | | | | | It was just an experiment. | |||||
| * | snapshot: write to disk using BIOS | Kartik K. Agaram | 2021-03-15 | 2 | -0/+15 | |
| | | | | | | | | | | | Requires the following commands: dd if=/dev/zero of=data.img count=20160 ./translate life.mu qemu-system-i386 -hda disk.img -hdb data.img Before running Qemu, data.img will contain all 0s. After quitting Qemu, data.img will contain the first 512 bytes of disk.img. | |||||
| * | fix a failing test in pack.subx | Kartik K. Agaram | 2021-03-15 | 2 | -5/+68 | |
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| * | boot.subx is now clean SubX | Kartik K. Agaram | 2021-03-15 | 3 | -14/+30 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -18/+18 | |
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| * | reintroduce Entry label | Kartik K. Agaram | 2021-03-15 | 4 | -10/+6 | |
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| * | clean up padding | Kartik K. Agaram | 2021-03-15 | 1 | -26/+0 | |
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| * | clean up magic constants | Kartik K. Agaram | 2021-03-15 | 5 | -70/+30 | |
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| * | first pass translating all of boot.subx | Kartik K. Agaram | 2021-03-15 | 1 | -16/+14 | |
| | | | | | | | | There's still a few places to clean up surrounded in: == data ... == code | |||||
| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -27/+27 | |
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| * | get shell/ working | Kartik K. Agaram | 2021-03-15 | 1 | -5/+5 | |
| | | | | | This mutates the expected binary. | |||||
| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -84/+63 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -8/+11 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 1 | -11/+9 | |
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| * | manual labels remaining in boot.subx: keyboard + 1 | Kartik K. Agaram | 2021-03-15 | 1 | -3/+2 | |
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| * | . | Kartik K. Agaram | 2021-03-15 | 3 | -25/+71 | |
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| * | clean up padding | Kartik K. Agaram | 2021-03-15 | 1 | -139/+12 | |
| | | | | | | I'm going to explicitly show all reserved data even if I don't use it. Segment headers are only for padding. | |||||
| * | first pass translating boot sector | Kartik K. Agaram | 2021-03-15 | 1 | -19/+5 | |
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