NEO-I0: Difference between revisions

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[[File:neo-i0.jpg|right|thumb|NEO-I0 chip found on a [[MV2B]] MVS board.]]
{{ChipInfo
|picture=neo-i0.jpg
|pkg=QFP64R
|manu=fujitsu
|date=1990 ?
|gates=
|used_on={{PCB|MV2B}} ...
}}


MVS specific chip that does a bunch of unrelated things.
MVS specific chip that does a bunch of unrelated things.


*[[S ROM]] 16bit address latch for [[SFIX]], same as S ROM portion of [[NEO-273]]
* [[S ROM]] 16bit address latch for [[SFIX]], same as S ROM portion of {{Chipname|NEO-273}}
*[[SM1]] /CS output when Z80 is reading from ROM and onboard ROMs are enabled
* [[SM1]] /CS output when {{Chipname|Z80}} is reading from ROM and onboard ROMs are enabled
*/ROMOE output for cartridge(s) [[PROG board]]
* {{Sig|ROMOE|ROMOE}} output for cartridge(s) [[PROG board]]
*Video sync inversion (or not) to JAMMA edge
* Video sync inversion (or not) to [[JAMMA_connector_pinout|JAMMA connector]]
*Coin counter and coin lockout output
* [[Coin counter]] and [[coin lockout]] outputs
 
Why is A3 needed ?


=Pinout=
=Pinout=
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|
|
*A0~A3,A7: [[68k]] address bus
*A0~A3,A7: {{Chipname|68k}} address bus
*P0~P15: [[GPU]] multiplexed bus
*P0~P15: [[GPU]] multiplexed bus
*Q01~Q18: [[SFIX]] ROM address lines
*Q01~Q18: [[SFIX]] ROM address lines
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*Q21, Q22: METER1, METER2
*Q21, Q22: METER1, METER2
*Q23, Q24: LOCK1, LOCK2
*Q23, Q24: LOCK1, LOCK2
*DS0, DS1: Data select for 2-slot systems made from SLOT0, SLOT1, PORTADRS and ROMOE, goes to a [[NEO-G0]]
*DS0, DS1: Data select for 2-slot systems made from SLOT0, SLOT1, PORTADRS and ROMOE, goes to a {{Chipname|NEO-G0}}
*CUNTOUT: Address decode from [[NEO-F0]]
*CUNTOUT: Address decode from {{Chipname|NEO-F0}}
|}
|}


[[Category:Chips]]
[[Category:Chips]]

Revision as of 01:28, 12 October 2016

Package QFP64R
Manufacturer
First use 1990 ?
Used on MV2B ...

MVS specific chip that does a bunch of unrelated things.

Pinout

File:Neo-i0 pinout.png

OpenOffice Draw file: File:Neo-i0.odg

  • A0~A3,A7: 68k address bus
  • P0~P15: GPU multiplexed bus
  • Q01~Q18: SFIX ROM address lines
  • SM1CS(ORO0): SM1 ROM chip select, made from SYSTEM(ORI0) OR SDROM(ORI1)
  • SYNCOUT = SYNCIN XOR SYNCREV (SYNCREV always tied to ground ?)
  • Q21, Q22: METER1, METER2
  • Q23, Q24: LOCK1, LOCK2
  • DS0, DS1: Data select for 2-slot systems made from SLOT0, SLOT1, PORTADRS and ROMOE, goes to a NEO-G0
  • CUNTOUT: Address decode from NEO-F0