Facsimile and static presentation processing – Static presentation processing – Memory
Patent
1998-02-20
2000-08-22
Evans, Arthur G.
Facsimile and static presentation processing
Static presentation processing
Memory
358 11, G06K 1500
Patent
active
061081000
ABSTRACT:
A printer including a memory configured to store executable code; a processor coupled to the memory and configured to execute executable code; a print mechanism coupled to the processor and configured to print an image in response to execution of executable code; a memory receptacle configured to removably receive a plug-in memory; and a memory controller configured to selectively write executable code onto a plug-in memory received by the memory receptacle. A method of operating an electronic device having a ROM including locations storing executable code, the locations having addresses, the electronic device further having a processor coupled to the memory and configured to execute executable code in locations at provided addresses, and a memory receptacle configured to receive an expansion memory unit including RAM having locations, the locations having addresses, the method comprising providing memory addresses to the processor, the memory addresses being for locations in the ROM; using the processor, executing executable code in locations at the addresses provided by the memory controller; determining if a user desires to use an expansion memory unit for data storage or for storing executable code; and copying executable program code from the ROM onto RAM in an expansion memory and switching from providing address locations in the ROM to address locations in the RAM, while the processor is executing executable code, if it is determined that a user desired to use an expansion memory unit for storing executable code.
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Fahrenkrug Mark A.
McVey John R.
Evans Arthur G.
Hewlett--Packard Company
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