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Update README.md
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Add APIC timer interval for i7-9750H
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w-woloszyn authored Apr 2, 2024
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Expand Up @@ -306,17 +306,18 @@ version of the processor when recent [transient-execution attack](https://transi
in place to flush microarchitectural buffers on enclave entry/exit.
Some different microcode versions are provided for reference in the table below.

| Model name | CPU | Base frequency | ucode (date) | APIC timer interval |
| ------------- | ------------------------------------------------------------------------------------------------------------------------------------ | -------------- | ----------------- | ------------------- |
| Skylake | [i7-6700](https://ark.intel.com/products/88196) | 3.4 GHz | ? | 19 |
| Skylake | [i7-6500U](https://ark.intel.com/products/88194) | 2.5 GHz | ? | 25 |
| Skylake | [i5-6200U](https://ark.intel.com/products/88193) | 2.3 GHz | ? | 28 |
| Kaby Lake R | [i7-8650U](https://ark.intel.com/products/124968) | 1.9 GHz | ? | 34 |
| Kaby Lake R | [i7-8650U](https://ark.intel.com/products/124968) | 1.9 GHz | 0xca (2019-10-03) | 54 |
| Coffee Lake R | [i7-9700](https://ark.intel.com/content/www/us/en/ark/products/191792/intel-core-i79700-processor-12m-cache-up-to-4-70-ghz.html) | 3 GHz | 0xf4 (2022-07-31) | 26 |
| Coffee Lake R | [i9-9900K](https://ark.intel.com/products/186605) | 3.6 GHz | ? | 21 |
| Ice Lake | [i5-1035G1](https://ark.intel.com/content/www/us/en/ark/products/196603/intel-core-i5-1035g1-processor-6m-cache-up-to-3-60-ghz.html) | 1.00 GHz | 0x32 (2019-07-05) | 135 |
| Ice Lake | [i5-1035G1](https://ark.intel.com/content/www/us/en/ark/products/196603/intel-core-i5-1035g1-processor-6m-cache-up-to-3-60-ghz.html) | 1.00 GHz | 0xb0 (2022-03-09) | 255 |
| Model name | CPU | Base frequency | ucode (date) | APIC timer interval |
| ------------- | ------------------------------------------------------------------------------------------------------------------------------------ | -------------- | ----------------- | ------------------- |
| Skylake | [i7-6700](https://ark.intel.com/products/88196) | 3.4 GHz | ? | 19 |
| Skylake | [i7-6500U](https://ark.intel.com/products/88194) | 2.5 GHz | ? | 25 |
| Skylake | [i5-6200U](https://ark.intel.com/products/88193) | 2.3 GHz | ? | 28 |
| Kaby Lake R | [i7-8650U](https://ark.intel.com/products/124968) | 1.9 GHz | ? | 34 |
| Kaby Lake R | [i7-8650U](https://ark.intel.com/products/124968) | 1.9 GHz | 0xca (2019-10-03) | 54 |
| Coffee Lake R | [i7-9700](https://ark.intel.com/content/www/us/en/ark/products/191792/intel-core-i79700-processor-12m-cache-up-to-4-70-ghz.html) | 3 GHz | 0xf4 (2022-07-31) | 26 |
| Coffee Lake R | [i9-9900K](https://ark.intel.com/products/186605) | 3.6 GHz | ? | 21 |
| Coffee Lake HR | [i7-9750H](https://ark.intel.com/content/www/us/en/ark/products/191045/intel-core-i7-9750h-processor-12m-cache-up-to-4-50-ghz.html) | 2.6 GHz | 0xf4 (2023-02-23) | 37 |
| Ice Lake | [i5-1035G1](https://ark.intel.com/content/www/us/en/ark/products/196603/intel-core-i5-1035g1-processor-6m-cache-up-to-3-60-ghz.html) | 1.00 GHz | 0x32 (2019-07-05) | 135 |
| Ice Lake | [i5-1035G1](https://ark.intel.com/content/www/us/en/ark/products/196603/intel-core-i5-1035g1-processor-6m-cache-up-to-3-60-ghz.html) | 1.00 GHz | 0xb0 (2022-03-09) | 255 |

**Note (calibration).**
Currently, the easiest way to configure a reliable timer interval is to
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