NB1-1

Found on...

• Nebulus Ray
• Point Blank (Namco NB1)

Notes

Note from MAME source:
World set using non standard ROM labels (NR is Namco's prefix for Nebulas Ray, but NOT here!!), verified on 2 separate PCBs

Nebulus Ray Equations

Inputs:

2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19

Outputs:

12 (Combinatorial, Output feedback output, Active high)
13 (Combinatorial, Output feedback output, Active high)
14 (Registered, Output feedback registered, Active high)
15 (Registered, Output feedback registered, Active high)
16 (Registered, Output feedback registered, Active high)
17 (Registered, Output feedback registered, Active high)
18 (Registered, Output feedback registered, Active high)
19 (Registered, Output feedback registered, Active high)

Equations:

o12 = !i9 & !o13
o12.oe = vcc

o13 = i8 & i9 & rf14 #
      o13 & rf19 #
      o13 & rf14
o13.oe = vcc

rf14.d = !i8 & !i9 & !o13 & !rf15 #
         rf14 & !rf15
rf14.oe = OE

rf15.d = o13 & rf14
rf15.oe = OE

rf16.d = o13 & rf14 #
         rf15
rf16.oe = OE

rf17.d = o13 & rf14 #
         rf16
rf17.oe = OE

rf18.d = o13 & rf14 #
         rf17
rf18.oe = OE

rf19.d = o13 & rf14 #
         rf18
rf19.oe = OE