Difference between revisions of "NEO-MGA"

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[[File:cd1_neo-mga.jpg|right|thumb|NEO-MGA chip found in a CD1 system.]]
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NEO-MGA is a custom chip apparently noone knows (and wants to know) about, which is found in 3 versions in CD systems and some late MVS boards:
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* NEO-MGA in the CD1 model (front loading).
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* NEO-MGA-T in the CD2 model (top loading) and [[MV1A]] MVS boards. Probably the same but made by Toshiba.
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* NEO-MGA-T2 in the CDZ, probably with a different pinout and maybe stuff related to the [[copy protection]] system.
  
[[File:cd2_mga.jpg|right|thumb|NEO-MGA-T chip found in a CD2 system.]]
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It's used for communication between the main board and the [[CD modules|CD module]], for handling [[DRAM]] access (?), address decoding (?) and for buffering [[CDDA]] data.
  
NEO-MGA is a damn custom chip apparently noone knows about, which is found in 3 versions in the CD systems:
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<gallery>
*NEO-MGA in the CD1 model (front loading)
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cd1_neo-mga.jpg|NEO-MGA chip found in a CD1 system.
*NEO-MGA-T in the CD2 model (top loading)
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cd2_mga.jpg|NEO-MGA-T chip found in a CD2 system.
*NEO-MGA-T2 in the CDZ probably able to handle the faster CD reading speeds and the new [[copy protection]] system.)
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</gallery>
 
 
It's used for communication between the main board and the [[CD modules|CD module]], for handling [[DRAM]] access (?) and for buffering [[CDDA]] data.
 
  
 
=Pinout=
 
=Pinout=

Revision as of 23:40, 20 August 2016

NEO-MGA is a custom chip apparently noone knows (and wants to know) about, which is found in 3 versions in CD systems and some late MVS boards:

  • NEO-MGA in the CD1 model (front loading).
  • NEO-MGA-T in the CD2 model (top loading) and MV1A MVS boards. Probably the same but made by Toshiba.
  • NEO-MGA-T2 in the CDZ, probably with a different pinout and maybe stuff related to the copy protection system.

It's used for communication between the main board and the CD module, for handling DRAM access (?), address decoding (?) and for buffering CDDA data.

Pinout

File:Neo-mga.png

Pinout (NEO-MGA-T)

1,10,15,16,18,30,41,50,59,70,81,90,110,121,130,139,150: Ground.