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Has a built-in 8-bit input/output port and 256 bytes of internal static RAM. MOS 6509: Can address up to 1 MB of RAM as 16 banks of 64 KB and was used in the Commodore CBM-II series. MOS 6510: Has a built-in 6-bit programmable input/output port and was used in the Commodore 64. The 8500 is effectively an HMOS version of the 6510, and replaced ...
The earliest form of a jackhammer, a "percussion drill" was invented in 1848 and patented in 1849 by Jonathan J. Couch of Philadelphia, Pennsylvania. In this drill, the drill bit passed through the piston of a steam engine. The piston snagged the drill bit and hurled it against the rock face. It was an experimental model. [107] 1849 Safety pin