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153 bytes added ,  14:40, 29 December 2020
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The printer also supports PhotoGrade printing. This is a technology that enables the LaserWriter 12/640 PS printer to print photographs with as many as 97 shades of gray. PhotoGrade can designate more than one level of gray for each pixel by controlling the size of the dots. Photographs printed using PhotoGrade technology retain a higher level of detail than that achieved by other 600-dpi laser printers. You need a minimum of 12 MB of DRAM, implemented by the 8 MB DRAM update, to support this feature.
 
The printer also supports PhotoGrade printing. This is a technology that enables the LaserWriter 12/640 PS printer to print photographs with as many as 97 shades of gray. PhotoGrade can designate more than one level of gray for each pixel by controlling the size of the dots. Photographs printed using PhotoGrade technology retain a higher level of detail than that achieved by other 600-dpi laser printers. You need a minimum of 12 MB of DRAM, implemented by the 8 MB DRAM update, to support this feature.
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The LaserWriter 12/640 PS printer comes with 4 MB of DRAM installed in one of its two SIMM slots. You can expand DRAM capacity up to 64 MB by using higher capacity SIMMs and populating both slots. The LaserWriter 12/640 PS has separate controller systems for imaging and I/O processing. The imaging system uses an AMD AM29040 processor, and the I/O processing system uses an 80C186 embedded processor. The imaging and I/O systems share messages and data through a shared SRAM (static RAM).  
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The LaserWriter 12/640 PS printer comes with 4 MB of DRAM installed in one of its two SIMM slots. You can expand DRAM capacity up to 64 MB by using higher capacity SIMMs and populating both slots. The LaserWriter 12/640 PS has separate controller systems for imaging and I/O processing. The imaging system uses an AMD AM29040 processor, and the I/O processing system uses an 80C186 embedded processor. The imaging and I/O systems share messages and data through a shared SRAM (static RAM).
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=LaserWriter 16/600 PS=
 
=LaserWriter 16/600 PS=

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