T6W28 Cover: 4mat - Empty (512 bytes) 

Probably the commodore PET demo "no pets allowed."

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This is like sid with 32 sound channels?

nope, it was used in the Neo Geo Pocket (or Pocket Color i forget exactly which)

@@whydoineedhandles was used in both

Nope, this is the Toshiba T6W28, the PSG used in the Neo Geo Pocket. Sounds more primitive than the IIGS or the SID chip.

@@Metalchip1989 The T6W28 is a slight variant of the SN76489. The 2GS uses the ES5503, a 32-voice sampling chip.