This patent was asserted by Microsoft Corp. against TomTom
#111Commercial product March 1991 CDTV
Applies to Claims 1,10,13,3,6,8
Last updated: about 1 year ago
Summary / Description
Summary / DescriptionCommercial product March 1991 CDTV had built in PCMCIA like card slot and was treated as an extension to the file system
 
Basic Information
Type of Prior ArtOnline Publication
 
URLhttp://www.cdtv.org.uk/index.ht...
 
Author/CreatorOliver Hannaford-Day
 
TitleCDTV Information
 
Publication DateJune 26, 2004
 
Publishernet
 
Directions to Document Locationhttp://www.cdtv.org.uk/index.html
 
Additional InformationMany of the key development and management teams are still in contact with each other... don@comcam.net
 
Notes / To Do
NotesThe Commodore Amiga and CDTV community will be happy to supply links, stories about this device we had fun developing.
 
Excerpt
CDTV Memory Map circa 91-95ish CDTV Memory Map 000000-0FFFFF Chip memory 100000-1FFFFF Space for extra chip memory (Megachip) 200000-9FFFFF Space for AutoConfig memory A00000-BFFFFF CIA chips C00000-C7FFFF Space for slow-fast memory C80000-DBFFFF Space DC0000-DC7FFF Power backed-up real time clock DC8000-DC87FF Non-volatile RAM DC8800-DCFFFF Space in non-volatile RAM decoded area DD0000-DEFFFF Space DF0000-DFFFFF Custom chips E00000-E7FFFF Memory card address space for front panel memory card E80000-E8FFFF AutoConfig configuration space E90000-E9FFFF First AutoConfig device, used by DMAC EA0000-EFFFFF Space for other AutoConfig devices F00000-F3FFFF CDTV ROM F40000-F7FFFF Space in CDTV ROM decoded area F80000-FBFFFF Space in Kickstart ROM decoded area (used by Kickstart 2) FC0000-FFFFFF Kickstart ROM
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Claims
Storing and identifying data regions

A method of addressing a data region in a computer memory device, the memory divided into blocks, each block having a physical block number, the method comprising the steps of: storing an allocation table in each block, the allocation table having entries that indicate an offset of a data region within the block and that have an entry index; storing a logical block number in each block; identifying a data region by logical block number and allocation table entry index; and generating an address to the identified data region based on the logical block number and the allocation table entry index.
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Memory manager with file allocation table

A method of managing memory in a block-erasable, programmable, read-only memory, the memory being divided into blocks of memory locations, each block have a table and a data region divided into data areas, each table having entries corresponding to the data areas, the method comprising the steps of: selecting a block in which to store data; selecting a data area within the data region for the selected block in which to store data; selecting a table entry to correspond to the selected data area; setting the selected table entry to correspond to the selected data area and to indicate that the data area contains data; and storing data in the selected data area.
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Initialization routine

The manager for a computer memory of Claim 1 further comprising: an initialization routine, each block having header information, the initialization routine for gathering information from the headers and from the allocation tables and storing the gathered information in a memory cache.
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Memory manager with file allocation table

A method of managing memory in a block-erasable, programmable, read-only memory, the memory being divided into blocks of memory locations, each block having an allocation table and a data region divided into data areas, each allocation table having entries corresponding to region data areas, the method comprising the steps of: selecting a block in which to store data; selecting a data area within the data region for the selected block in which to store data; selecting an allocation table entry to correspond to the selected data area; setting the selected allocation table entry to correspond to the selected data area and to an allocated state; and storing data in the selected data area.
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Memory manager with file allocation table

A manager for a computer memory comprising: a block allocation routine, the memory divided into blocks of memory locations, each block having an allocation table and a data region divided into data areas, each allocation table having entries corresponding to region data areas, the block allocation routine for selecting a block in which to store data; a data area allocation routine for selecting a data area within the data region for the selected block in which to store data, for selecting an allocation table entry to correspond to the selected data area, and for setting the selected allocation table entry to correspond to the selected data area and to an allocated state; and a storage routine for storing data in the selected data area.
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Block-erasable, programmable ROM

The method of Claim 6 or 7 wherein the computer memory device is a block-erasable, programmable, read-only memory.
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