{{tag>collection_mcmaster vendor_yamaha type_unknown year_unknown foundry_unknown tech_unknown}}

"9224 EACG is the 'new style' post 1990 yamaha datecode: 9224 = 1992 week 24, EACG = lotcode EAC, revision G"

====== Package ======

{{:digshadow:yamaha:ym2151:pack_top.jpg?300|}}
{{:digshadow:yamaha:ym2151:pack_bot.jpg?300|}}

Top:
<code>
YAMAHA JAPAN
YM2151
9224 EACG
</code>


====== Die ======

Label:
<code>
2151
</code>  

Not cleanly decapped (needed more time due to unusually large die), resulted in minor damage and dirty image


====== Map ======

[[http://siliconpr0n.org/map/yamaha/ym2151/mcmaster_mz_mit20x/|Map @ Mit20x]]
  * Original pr0nscope w/ MU800

[[https://siliconpr0n.org/map/yamaha/ym2151/mcmaster_mz_mit20x2-2/|mz_mit20x2-2]]

  * [[https://siliconpr0n.org/map/yamaha/ym2151/single/yamaha_ym2151_mcmaster_mz_mit20x2-2.jpg|Single]] (12151x9724, 40.369MiB)
  * New pr0nscope w/ USB3
  * Seeing upper right of image is missing (some aperture is occluding view?)
    * Very slight. W/ stitching its hard to see in final images since it is in overlap area between adjacent images
  * It doesn't show up too badly in pictures, but looked really bad last night
  * I was unable to significantly change it (better or worse) despite adjusting many things
  * Using ergo head

mz_mit20x2-3
  * IP
  * Switch back to trinoc head
  * Occlusion appears to be gone
  * Re-calibrate color, turn down brightness
{{https://siliconpr0n.org/map/yamaha/ym2151/single/yamaha_ym2151_mcmaster_mz_mit20x_4-exp.thumb.jpg}}

[[https://siliconpr0n.org/map/yamaha/ym2151/mcmaster_mz_mit20x_4-exp/|mz_mit20x_4-exp]]

  * [[https://siliconpr0n.org/map/yamaha/ym2151/single/yamaha_ym2151_mcmaster_mz_mit20x_4-exp.jpg|Single]] (31602x25300, 200.391MiB)
{{https://siliconpr0n.org/map/yamaha/ym2151/single/yamaha_ym2151_mcmaster_mz_mit20x_4-exp.thumb.jpg}}

[[https://siliconpr0n.org/map/yamaha/ym2151/mcmaster_mz_mit20x_4-exp/|mz_mit20x_4-exp]]

  * [[https://siliconpr0n.org/map/yamaha/ym2151/single/yamaha_ym2151_mcmaster_mz_mit20x_4-exp.jpg|Single]] (31602x25300, 210.213MiB)