NEO-F0

From NeoGeo Development Wiki
Revision as of 07:02, 13 April 2012 by SMKDAN (talk | contribs)
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
NEO-F0 chip found on a MV1S MVS board.

MVS specific chip.

Handles the UPD4990 calendar access, dipswitches, cab switches (test, service...), coin counters, LED marquee outputs and slot selection signals for multi-slot boards.

Pinout

File:Neo-f0 pinout.png

OpenOffice Draw file: File:Neo-f0.odg

  • A4~A7: 68k address bus
  • D0~D7: 68k data bus
  • 4990: uPD4990 RTC interface
  • DATA0~DATA7: LED marquee latch data
  • SLOT*: /CS for multislot boards ?
  • DIP00~DIP07: Dipswitch inputs
  • IN3: Output IN300~IN302 to D0~D2 and CALDIF/CALDOUT to D6/D7 (read $320001)
  • DIPRD: Output to D0~D7 depending on state of A7 (from
    • A7 is low: output DIP00~DIP07 (read $300001)
    • A7 is high: output IN01 on D7 (test switch) and TYPE? on D6 (read $300081)
  • BITW0: writes to $3800x1 region...(fill in)
  • SLOTA~SLOTC: slot selection?
  • SLOT0~SLOT5: decoded slot selection? (SLOT0 mislabelled as SLOTD in pic)

MV1F:

  • IN00: Ground
  • IN01: Test switch
  • IN300: P1 Coin switch
  • IN301: P2 Coin switch
  • IN302: Service switch
  • IN303/IN304: VCC