IBM 24, User Manual

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Using Memory Reduction Technology with Page Protection
The printer includes a memory management feature called Memory Reduction
Technology with Page Protection.
Memory Reduction Technology uses the Page Protection function, which you set from
the operator panel as PAGEPROT, to help manage printer memory. The Page
Protection feature provides two values you can select from the operator panel, under
PCL Menu, Page Protect, and PS Menu, Page Protect:
Value Description
Auto Reserves minimum amount of memory for a page. The amount of memory
reserved is approximately one-fourth of the page. Auto is the default value.
ON Reserves enough memory to print entire page. To use this value, you must
have enough memory installed as listed in Table 7 on page 199.
Page protection is used to reserve memory to hold a full page of information. The
memory is reserved until the page is printed. Reserving memory for a page helps
ensure that the page is printed on the printer. This often reduces errors, such as buffer
overrun or memory overflow, which can occur when a large print job is sent to the
printer and the printer tries to print the current page in memory and add a new page to
memory.
An example would be where a large print job with complex graphics is sent to the
printer. When a page that contains a complex graphic is stored in memory, there might
not be enough memory to process that page. Page Protection reserves as much
memory as needed to print the page. No other pages are moved into memory until the
previous page is printed. Without Page Protection, the printer may have printed only
part of the page, or may have run out of memory resulting in a memory overflow error
or buffer full error.
Page Protection can often prevent memory overruns but there are some instances
when Page Protection may not prevent a memory overrun. Here are some examples:
Ÿ Amount of downloaded fonts exceeds available printer memory.
Ÿ
Page size is larger than expected and there is not enough memory available for
that page size for use with Page Protection..
See Table 7 on page 199 for minimum memory requirements when using Page
Protection.
Network Administrator Tip
Using the Memory Reduction Technology feature with Page Protection enables the
printer to handle larger print jobs with less memory. But you may find that large,
complex, print jobs take longer to print and quality of the print jobs may be
degraded. In this case, you will want to add more DRAM memory to your printer.
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User's Guide