Revision as of 06:25, 16 January 2017

MVS specific chip that does a bunch of unrelated things.

S ROM 16bit address latch for the SFIX ROM, same as S ROM portion of NEO-273
SM1 /CS output when Z80 is reading from ROM and onboard ROMs are enabled
ROMOE output for cartridge(s) PROG board
Video sync inversion (or not) to JAMMA connector
Coin counter and coin lockout outputs

Pinout

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

@@ Line 10: / Line 10: @@
 MVS specific chip that does a bunch of unrelated things.
-* [[S ROM]] 16bit address latch for [[SFIX]], same as S ROM portion of {{Chipname|NEO-273}}
+* [[S ROM]] 16bit address latch for the [[SFIX ROM]], same as S ROM portion of {{Chipname|NEO-273}}
 * [[SM1]] /CS output when {{Chipname|Z80}} is reading from ROM and onboard ROMs are enabled
 * {{Sig|ROMOE|ROMOE}} output for cartridge(s) [[PROG board]]