The way to select memory locations using segmented addressing is to add a 16-bit address to a " base address, " which determines the additional bits needed to produce the full address.
42.
Using the color video buffer space, some third-party utilities could add memory at the top of the 640k conventional memory area, to extend memory up to the base address used by hardware adapters.
43.
On the 1900 all user memory addresses were modified by a " datum " ( base address ) register and checked against a " limit " register, preventing one program interfering with another.
44.
This pass is usually omitted on hardware offering virtual memory : every program is put into its own address space, so there is no conflict even if all programs load at the same base address.
45.
The location of memory read by ANTIC for Player / Missile graphics is controlled by register PMBASE . This value of PMBASE provides the starting page of the base address for Player / Missile graphics.
46.
Proper access to these carved sections of core are made by taking the base address of the area, and adding to it the product of the I-stream relative number times the size of each area.
47.
If the base address of all 32-bit segments is set to 0, and segment registers are not used explicitly, the segmentation can be forgotten and the processor appears as having a simple linear 32-bit address space.
48.
On the other hand, an example of external use would be a company which provides a PAF-based address look-up on their customer facing website for their own customers to use when they order goods or services.
49.
WLM will then look for alias UCBs that are processing work for less important tasks ( service class ), and if appropriate, WLM will re-associate aliases to the base addresses associated with the more important work.
50.
If you have a traceable e-mail address _ rather than one of those free, anonymous Web-based addresses such as provided by Yahoo or Netscape _ you don't even have to give eBay a credit card number to register.
