CDZ: Difference between revisions

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Yes, it has a 2x CD drive, which is used at 2x speed. [[Loading time]]s aren't exactly cut by 2 when comparing to older models due to fixed delays caused by CPU data copy.
Yes, it has a 2x CD drive, which is used at 2x speed. [[Loading time]]s aren't exactly cut by 2 when comparing to older models due to fixed delays caused by CPU data copy.


[[File:Cdz_ov.jpg]]
It is obvious that SNK anticipated the possibility of integrating the CD drive's electronics directly onto the motherboard. This apparently has never been done.


[[File:Cdz_ovtop.jpg]]
Board layout really looks like the NeoGeo Pocket.


{{Chipname|NEO-GRC2-F}}
[[File:Cdz_ov.jpg]]
 
[[File:Cdz_dsp.jpg|400px]]
 
See [[optical pickups]]
 
[[File:Cdz_opickup.jpg]]
 
Sanyo {{Chipname|LC89513}} CD host chip, able to do 4x speed by the way:
 
[[File:Cdz_lc89513.jpg]]
 
[[File:Cdz_driveassy.jpg]]
 
[[File:Cdz_cdmotordrv.jpg]]
 
[[File:Cdz_9295.jpg]]
 
{{Chipname|Z80}}, its RAM and 1MiB [[PCM]] [[DRAM]]:
 
[[File:Cdz_z80ss.jpg]]
 
Same weird voltage limiting power supply circuit:
 
[[File:Cdz_psu.jpg]]
 
[[File:Cdz_ga3.jpg|400px]]
 
[[File:Cdz_jumpers.jpg]]
 
System ROM: TOP-SPD.
[[File:Cdz_bios.jpg]]
 
Unpopulated fotprint for CD drive chips:
 
[[File:Cdz_cdmotordrvfp.jpg|400px]]
 
[[File:Cdz_mcufp.jpg]]


[[File:Cdz_dspfp.jpg]]
<gallery>
File:Cdz_ovtop.jpg|Main board using {{Chipname|NEO-GRC2-F}}
File:Cdz_dsp.jpg|CD DSP
File:Cdz_opickup.jpg|See [[optical pickups]]
File:Cdz_lc89513.jpg|Sanyo {{Chipname|LC89513}} CD host chip (able to do 4x speed by the way)
File:Cdz_driveassy.jpg|CD drive
File:Cdz_cdmotordrv.jpg|Motor driver
File:Cdz_9295.jpg|CD driver mcu
File:Cdz_z80ss.jpg|{{Chipname|Z80}}, its RAM and 1MiB [[PCM]] [[DRAM]]
File:Cdz_psu.jpg|Same weird voltage limiting power supply circuit
File:Cdz_ga3.jpg|Standard-branded Fujitsu CG24 series gate array !
File:Cdz_jumpers.jpg|Configuration jumpers
File:Cdz_bios.jpg|[[System ROM]]: TOP-SPD
File:Cdz_cdmotordrvfp.jpg|Unpopulated...
File:Cdz_mcufp.jpg|...footprints...
File:Cdz_dspfp.jpg|for CD drive chips.
</gallery>


[[Category:CD systems]]
[[Category:CD systems]]

Latest revision as of 03:17, 16 August 2016

Yes, it has a 2x CD drive, which is used at 2x speed. Loading times aren't exactly cut by 2 when comparing to older models due to fixed delays caused by CPU data copy.

It is obvious that SNK anticipated the possibility of integrating the CD drive's electronics directly onto the motherboard. This apparently has never been done.

Board layout really looks like the NeoGeo Pocket.

  • Main board using NEO-GRC2-F

    Main board using NEO-GRC2-F

  • CD DSP

    CD DSP

  • See optical pickups

    See optical pickups

  • Sanyo LC89513 CD host chip (able to do 4x speed by the way)

    Sanyo LC89513 CD host chip (able to do 4x speed by the way)

  • CD drive

    CD drive

  • Motor driver

    Motor driver

  • CD driver mcu

    CD driver mcu

  • Z80, its RAM and 1MiB PCM DRAM

    Z80, its RAM and 1MiB PCM DRAM

  • Same weird voltage limiting power supply circuit

    Same weird voltage limiting power supply circuit

  • Standard-branded Fujitsu CG24 series gate array !

    Standard-branded Fujitsu CG24 series gate array !

  • Configuration jumpers

    Configuration jumpers

  • System ROM: TOP-SPD

    System ROM: TOP-SPD

  • Unpopulated...

    Unpopulated...

  • ...footprints...

    ...footprints...

  • for CD drive chips.

    for CD drive chips.

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