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Phaser 740 and 750 Color Printers
Phaser 740 printer RAM and printer capabilities
The Phaser 740 printer features two DIMM connectors which accept both 16-, 32-, 64-,
and 128-Mbytes RAM DIMMs. The printer can use off-the-shelf RAM meeting these
specifications:
■
168-pin DIMM
■
Synchronous DRAM
■
3.3 volt
■
9 nsec speed
■
Valid on-board Serial Presence Detect ROM.
The Configuration Page lists the amount of installed RAM and the details; such as
type, parity, size, and manufacturer, about the DIMM installed in each slot.
Upon power-up, the image processor interrogates the 256 byte Serial Presence Detect
ROM which describes the DIMM with details such as data width, clock delay, number
of address columns and row, refresh rate and more. If the DIMM does not meets the
required specifications it will be ignored; no error message will be reported.
With more memory the printer gains the capabilities of printing at higher resolutions,
printing without having to use image compression (which trades off less installed
RAM for longer image processing time) and dual frame buffers for printing one image
while processing a second image (which gives greater printing throughput). With
additional RAM memory the printer’s capabilities increase as detailed in the
following table:
Installed RAM and printer capabilities
Feature 16 Mbytes 32 Mbytes 64 MBytes 80 Mbyte
600 x 600 dpi Color/mono Color/mono Color/mono Color/mono
1200 x 1200 dpi Black and white
only
Black and white
only
Color and black
and white
Color and black
and white
Pipelining Yes, if SCSI
board installed
Yes, if SCSI
board installed
Frame buffer 1 Letter size
image with
compression
1 Letter size
image with no
compression
2 Letter-size
images with
compression
2 Letter-sized
frame buffers
with no image
compression
Check print Yes, if SCSI
board installed
Yes, if SCSI
board installed
Collation
(requires hard
drive)
Yes, if SCSI
board installed
Yes, if SCSI
board installed
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General