NEC V20 series, x87 FPUs

[Torinde]

Is it possible to extend support for:

• [ ] NEC V20 series
  • [ ] NEC x86 instructions
  • [ ] 286 real mode instructions
  • [ ] 8080 mode
    • [ ] Z80 x86/8085 and x86/Z80 machines (single-chip or two-chip)
    • [ ] 8085 x86/8085 and x86/Z80 machines (single-chip or two-chip) - undocumented instructions are implemented here.
  • [ ] PC/XT I/O and peripherals
  • [ ] additional I/O and peripherals
    • [ ] V25
    • [ ] V53A
    • [ ] V55SC
    • [ ] RX116 RTOS
    • [ ] 8251
    • [ ] 8253/8254 remaining modes
    • [ ] 8255 parallel port
    • [ ] RTC
  • [ ] additional features
    • [ ] interrupt vector numbers compatible with Intel x86
    • [ ] 16MB addressing V33 type
    • [ ] 16MB addressing V55 type
    • [ ] separate address and data buses
      • [ ] Weitek 1067 FPU
      • [ ] 80287
    • [ ] PC/AT I/O and peripherals
  • [ ] NEC FPUs
    • [ ] x87 μPD72091 FPU
    • [ ] x87 μPD72191, D9008D FPU - FPOWER X^y = e^(y*logeX)
    • [ ] non-x87 FPU NEC 72291
• [ ] 8087
• [ ] 80187
• [ ] Am9511/Intel 8231 APU (works with 8080/8086) - z88dk-ticks has an implementation here.
• [ ] Am9512/Intel 8232 FPU (works with 8080/8086)