Apple 12/640PS manual RAM upgrade specifications, Simm dimensions

You can optionally install the Windows PPD files for these Apple LaserWriter printers:

mLaserWriter Select 360

mLaserWriter Pro 600

mLaserWriter Pro 630

mLaserWriter Color 12/600 PS

mLaserWriter 16/600 PS

mLaserWriter 12/640 PS

RAM upgrade specifications

To increase the printer’s RAM, purchase SIMMs with the following specifications:

SIMM dimensions

mLength: 107.95 mm +/- 0.20 mm (4.25 in. +/- .008)

mHeight: 25.53 mm (1.005 in.) maximum

SIMM sizes and speeds

Size	Configuration		Speed	Connector type
4 MB SIMM	1	M X 32 bit (one 4 MB bank)	70 ns or less	72-pin
8 MB SIMM	2	M X 32 bit (two 4 MB banks)	70 ns or less	72-pin
16 MB SIMM*	4	M X 32 bit (one 16 MB bank)	70 ns or less	72-pin
32 MB SIMM*	8	M X 32 bit (two 16 MB banks)	70 ns or less	72-pin

*Must have a 2 KB row (11 bit x 11 bit) refresh configuration. 16 MB SIMMs with a 4 KB row (10 bit X 12 bit) refresh configuration are not compatible with the printer.

Technical Information 353