Nebulas Ray

PLD's

PLD Information					Credits		Download	Pictures
Dump Method	Target Device	Location	ID	Status	Creator(s)	Tester(s)	Files	View
Recreated	PALCE16V8	8A	NB1-1	Tested	Porchy	Caius	JEDEC
Bruteforced	GAL16V8	8B	NB1-2	Tested	Caius	Caius	JEDEC

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

Equations

NB1-1 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

Credits

• IC pictures from Porchy