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Support temperatures < 0#38

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sergey-cheperis wants to merge 1 commit intoolealgoritme:masterfrom
500farm:master
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Support temperatures < 0#38
sergey-cheperis wants to merge 1 commit intoolealgoritme:masterfrom
500farm:master

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@sergey-cheperis sergey-cheperis commented Jan 4, 2026

The code was modified to to extract 13-bit signed value instead of 12-bit unsigned.

The type cast from int8_t to int32_t allows for proper sign extension.

Verified on RTX 4090:

Device: RTX 4090 GDDR6X (AD102 / 0x2684) pci=7:0:0
Device: RTX 4090 GDDR6X (AD102 / 0x2684) pci=1:0:0
Device: RTX 4090 GDDR6X (AD102 / 0x2684) pci=2:0:0
Device: RTX 4090 GDDR6X (AD102 / 0x2684) pci=3:0:0
VRAM Temps: |   0°C |   4°C |   2°C |  -2°C

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