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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:24:58 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:27:06 +0000 |
| commit | 33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch) | |
| tree | 406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1891829 | |
| parent | adedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff) | |
| download | emulator-bug-study-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz emulator-bug-study-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip | |
add launchpad bug reports without comments
Diffstat (limited to 'results/scraper/launchpad-without-comments/1891829')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1891829 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1891829 b/results/scraper/launchpad-without-comments/1891829 new file mode 100644 index 00000000..6d84b6dc --- /dev/null +++ b/results/scraper/launchpad-without-comments/1891829 @@ -0,0 +1,11 @@ +High bit(s) sometimes set high on rcvd serial bytes when char size < 8 bits + +I *believe* (not confirmed) that the old standard PC serial ports, when configured with a character size of 7 bits or less, should set non-data bits to 0 when the CPU reads received chars from the read register. qemu doesn't do this. + +Windows 1.01 will not make use of a serial mouse when bit 7 is 1. The ID byte that the mouse sends on reset is ignored. I added a temporary hack to set bit 7 to 0 on all incoming bytes, and this convinced windows 1.01 to use the mouse. + +note 1: This was using a real serial mouse through a passed-through serial port. The emulated msmouse doesn't work for other reasons. + +note 2: The USB serial port I am passing through to the guest sets non-data bits to 1. Not sure if this is the USB hardware or linux. + +note 3: I also needed to add an -icount line to slow down the guest CPU, so that certain cpu-sensitive timing code in the guest didn't give up too quickly. \ No newline at end of file |