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Preliminary VIA Cyrix III emulation

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This adds preliminary emulation of the first-gen Samuel core, used in the VIA Cyrix III CPU, at clock speeds from 66 to 700 MHz. This also moves the 440BX emulation out of the dev-branch.

Things working:
- CPUID
- Windows 98SE
- Timings seem identical between WinChip/W2's integer section and this

Things left to do:
- 3DNow on old dynarec
- Half-speed FPU (currently simulated with WinChip 1 timings instead of WinChip 2)
This commit is contained in:
nerd73
2020-03-01 15:06:35 -07:00
parent 5c4542283d
commit 111d82fa0c
10 changed files with 267 additions and 113 deletions
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3
src/machine/machine.h
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@@ -304,9 +304,10 @@ extern const device_t *at_pb640_get_device(void);
#if defined(DEV_BRANCH) && defined(USE_I686)
extern int machine_at_i440fx_init(const machine_t *);
extern int machine_at_s1668_init(const machine_t *);
#endif
extern int machine_at_6abx3_init(const machine_t *);
#endif
/* m_at_t3100e.c */
extern int machine_at_t3100e_init(const machine_t *);