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)