If Bochs is compiled with cpu level 5 or higher the CPUID opcode is supported and it can return some information about the cpu model and its features. When using a pre-defined CPU model in Bochs the features reported by CPUID are set up according to the model's specification. The following table shows all available CPU models with a short description. The amount of choices depends on the CPU features enabled at compile time (3rd column).
Table 5-3. Bochs CPU models
| Value | Description | Required Features |
|---|---|---|
| bx_generic | Default Bochs CPU configured with CPUID option | cpu level 5 |
| pentium | Intel Pentium (P54C) | cpu level 5 |
| pentium_mmx | Intel Pentium MMX | cpu level 5 |
| amd_k6_2_chomper | AMD-K6(tm) 3D processor (Chomper) | cpu level 5 |
| p2_klamath | Intel Pentium II (Klamath) | cpu level 6 |
| p3_katmai | Intel Pentium III (Katmai) | cpu level 6 |
| p4_willamette | Intel(R) Pentium(R) 4 (Willamette) | cpu level 6 |
| core_duo_t2400_yonah | Intel(R) Core(TM) Duo CPU T2400 (Yonah) | cpu level 6 |
| atom_n270 | Intel(R) Atom(TM) CPU N270 | cpu level 6 |
| p4_prescott_celeron_336 | Intel(R) Celeron(R) 336 (Prescott) | cpu level 6, x86-64 |
| athlon64_clawhammer | AMD Athlon(tm) 64 Processor 2800+ (Clawhammer) | cpu level 6, x86-64 |
| athlon64_venice | AMD Athlon(tm) 64 Processor 3000+ (Venice) | cpu level 6, x86-64 |
| turion64_tyler | AMD Turion(tm) 64 X2 Mobile TL-60 (Tyler) | cpu level 6, x86-64 |
| phenom_8650_toliman | AMD Phenom X3 8650 (Toliman) | cpu level 6, x86-64 |
| core2_penryn_t9600 | Intel Mobile Core 2 Duo T9600 (Penryn) | cpu level 6, x86-64 |
| corei5_lynnfield_750 | Intel(R) Core(TM) i5 750 (Lynnfield) | cpu level 6, x86-64 |
| corei5_arrandale_m520 | Intel(R) Core(TM) i5 M 520 (Arrandale) | cpu level 6, x86-64 |
| corei7_sandy_bridge_2600k | Intel(R) Core(TM) i7-2600K (Sandy Bridge) | cpu level 6, x86-64, avx |
| zambezi | AMD FX(tm)-4100 Quad-Core Processor (Zambezi) | cpu level 6, x86-64, avx |
| trinity_apu | AMD A8-5600K APU (Trinity) | cpu level 6, x86-64, avx |
| ryzen | AMD Ryzen 7 1700 | cpu level 6, x86-64, avx |
| corei7_ivy_bridge_3770k | Intel(R) Core(TM) i7-3770K CPU (Ivy Bridge) | cpu level 6, x86-64, avx |
| corei7_haswell_4770 | Intel(R) Core(TM) i7-4770 CPU (Haswell) | cpu level 6, x86-64, avx |
| broadwell_ult | Intel(R) Processor 5Y70 CPU (Broadwell) | cpu level 6, x86-64, avx |
| corei7_skylake_x | Intel(R) Core(TM) i7-7800X CPU (Skylake) | cpu level 6, x86-64, avx |
| corei3_cnl | Intel(R) Core(TM) i3-8121U CPU (Cannonlake) | cpu level 6, x86-64, avx |
| corei7_icelake_u | QuadCore Intel Core i7-1065G7 (IceLake) | cpu level 6, x86-64, avx |
| tigerlake | 11th Gen Intel(R) Core(TM) i5-1135G7 (TigerLake) | cpu level 6, x86-64, avx |