Summary

Implement the VLSI SuperCore and Wildcat (VL82c59x) chipsets and several machines:

• [Socket 4/5] DEC Celebris 5xx (PhoenixBIOS 4.04)
• [Socket 5] AST Bravo MS P/90 (AST BIOS)
• [Socket 5] DFI G586VPM Rev C (AwardBIOS 4.50PG)
• [Socket 5] Micronics M54Si (PhoenixBIOS 4.04)
• [Socket 5] Packard Bell PB600 (PhoenixBIOS 4.04)
• [Socket 5] AT&T Globalyst 620/630 (NCR 3248/3348) (PhoenixBIOS 4.04)
• [Socket 7] Zeos Pantera Wildcat (PhoenixBIOS 4.05)

Checklist

• Closes #xxx
• I have tested my changes locally and validated that the functionality works as intended
• I have discussed this with core contributors already
• This pull request requires changes to the ROM set
  • I have opened a roms pull request - Add ROMs for the VLSI SuperCore/Wildcat machines roms#390

References

Provide links to datasheets or other documentation that helped you implement this pull request.

• 5ch.net thread discussing shadow and L2 cacheability registers: https://itest.5ch.net/mevius/test/read.cgi/win/1531491400/92-n
• Compaq Pentium-based Presario 700/900 Technical Reference Guide and Prolinea E Series Technical Reference Guide (Compaq QuickFind): https://archive.org/details/20240422-121733
• DEC Celebris 5xx board pictures: https://theretroweb.com/motherboards/s/dec-celebris-560
• AST Bravo MS board pictures: https://theretroweb.com/motherboards/s/ast-bravo-ms,-ms-t,-ms-l-pentium-rattler-20
• DFI G586VPM Rev C board pictures and manual: https://theretroweb.com/motherboards/s/dfi-g586vpm-rev.-c
• Micronics M54Si Jumper Settings document: https://theretroweb.com/motherboards/s/micronics-m54si-09-00211-xx#docs
• Packard Bell PB600 board pictures: https://theretroweb.com/motherboards/s/packard-bell-pb600
• AT&T PSK-2000 board pictures: https://theretroweb.com/motherboards/s/at-t-psk-2000
• Zeos Boa 2 user manual: https://theretroweb.com/motherboards/s/zeos-boa-2#docs