NEO-G0: Difference between revisions

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=Internal logic=
=Internal logic=
Schematic is wrong: A and B sides are flipped !


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=AES pinout=
=Pinouts=
 
==AES==


Palette RAM and memory card access. Palette RAM /WE and P1 ROM /OE generation.
Palette RAM and memory card access. Palette RAM /WE and P1 ROM /OE generation.
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=MV2B @ J4 pinout=
==MV2B==
 
68k data bus access for both slots.
 
{|
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[[File:Neo-g0_J4_pinout.png|512px]]
 
OpenOffice Draw file: [[File:neo-g0_mv2b_J4.odg]]
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*D0~D15: [[68k]] data bus
*1D0~1D15: Slot 1 68k data bus
*2D0~2D15: Slot 2 68k data bus
 
*DS0,DS1: Slot 68k data enables from [[NEO-I0]]
*R/W: R/W from 68k
|}
 
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=MV2B @ J12 pinout=
 
ADPCM buses access for both slots.
 
{|
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[[File:Neo-g0_J12_pinout.png|512px]]
 
OpenOffice Draw file: [[File:neo-g0_mv2b_J12.odg]]
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*SDRAD0~SDRAD7: ADPCM-A data bus from [[YM2610]]
*1SDRAD0~1SDRAD7: ADPCM-A data bus for slot 1
*2SDRAD0~2SDRAD7: ADPCM-A data bus for slot 2
 
*SDPAD0~SDPAD7: ADPCM-B data bus from YM2610
*1SDPAD0~1SDPAD7: ADPCM-B data bus for slot 1
*2SDPAD0~2SDPAD7: ADPCM-B data bus for slot 2
 
*10 AS04: negated /ROE from YM2610
*12 AS04: negated /POE from YM2610
*SLOT0, SLOT1: enables from [[NEO-F0]]
 
|}
 
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=MV2B @ B7 pinout=
 
Palette RAM and memory card access. Palette RAM /WE and System ROM /OE generation.
 
{|
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[[File:Neo-g0_C7_pinout.png|512px]]


OpenOffice Draw file: [[File:neo-g0_mv2b_C7.odg]]
<gallery>
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File:Neo-g0_J4_pinout.png|J4: 68k data bus access for both slots. DS0,DS1: Slot 68k data enables from [[NEO-I0]]. OpenOffice Draw file: [[File:neo-g0_mv2b_J4.odg]]
Very similar connections with the one used in the AES.
File:Neo-g0_J12_pinout.png|J12: ADPCM buses access for both slots. 10 AS04: negated /ROE from YM2610, 12 AS04: negated /POE from YM2610. SLOT0, SLOT1: enables from [[NEO-F0]]. OpenOffice Draw file: [[File:neo-g0_mv2b_J12.odg]]
*D0~D15: [[68k]] data bus
File:Neo-g0_C7_pinout.png|B7: Palette RAM and memory card access. Palette RAM /WE and System ROM /OE generation. 28 C0 (PAL ?):Palette RAM address decode from [[PRO-C0]]. OpenOffice Draw file: [[File:neo-g0_mv2b_C7.odg]]
*PALD0~PALD7: Lower [[palette RAM]] data bus
</gallery>
*PAUD0~PAUD7: Upper palette RAM data bus
*MCD0~MCD15: [[Memory card]] data bus
 
*28 C0 (PAL ?):Palette RAM address decode from [[PRO-C0]]
*R/W: R/W from 68k
*PALWE: Palette RAM /WE, output made from PAL OR R/W
 
*SROMOEL, SROMOEU: from PRO-C0, System ROM byte /OE
*SROMOE: [[System ROM]] ROM /OE, output made from SROMOEU AND SROMOEL
 
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[[Category:Chips]]
[[Category:Chips]]

Latest revision as of 19:35, 2 May 2020

Package QFP64R
Manufacturer
First use 1992 ?
Used on MV2B ...

Quadruple 245 with additional OR and AND gates. Predecessor of NEO-BUF.

Internal logic

Schematic is wrong: A and B sides are flipped !

  • Pin 51 is enable for MCD0~MCD15
  • Pin 39 is enable for PALD0~PALD15
  • Pin 40 is direction select for D0~D7
  • Pin 52 is direction select for D8~D15

Pinouts

AES

Palette RAM and memory card access. Palette RAM /WE and P1 ROM /OE generation.


Edit this pinout

  • D0~D15: 68k data bus
  • PALD0~PALD7: Lower palette RAM data bus
  • PAUD0~PAUD7: Upper palette RAM data bus
  • MCD0~MCD15: Memory card data bus
  • PAL: Palette RAM address decode from NEO-C1
  • R/W: R/W from 68k
  • PALWE: Palette RAM /WE, output made from PAL OR R/W
  • ROMOEL, ROMOEU: from PRO-C0
  • ROMOE: Cartridge P ROM /OE, output made from ROMOEU AND ROMOEL

MV2B

  • J4: 68k data bus access for both slots. DS0,DS1: Slot 68k data enables from NEO-I0. OpenOffice Draw file: File:Neo-g0 mv2b J4.odg

    J4: 68k data bus access for both slots. DS0,DS1: Slot 68k data enables from NEO-I0. OpenOffice Draw file: File:Neo-g0 mv2b J4.odg

  • J12: ADPCM buses access for both slots. 10 AS04: negated /ROE from YM2610, 12 AS04: negated /POE from YM2610. SLOT0, SLOT1: enables from NEO-F0. OpenOffice Draw file: File:Neo-g0 mv2b J12.odg

    J12: ADPCM buses access for both slots. 10 AS04: negated /ROE from YM2610, 12 AS04: negated /POE from YM2610. SLOT0, SLOT1: enables from NEO-F0. OpenOffice Draw file: File:Neo-g0 mv2b J12.odg

  • B7: Palette RAM and memory card access. Palette RAM /WE and System ROM /OE generation. 28 C0 (PAL ?):Palette RAM address decode from PRO-C0. OpenOffice Draw file: File:Neo-g0 mv2b C7.odg

    B7: Palette RAM and memory card access. Palette RAM /WE and System ROM /OE generation. 28 C0 (PAL ?):Palette RAM address decode from PRO-C0. OpenOffice Draw file: File:Neo-g0 mv2b C7.odg

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