Method and apparatus for transferring coordinate data between a host computer and display device

Claim 3

The method of claim 1 wherein the communication channel includes operating limitations, the method comprising the additional step of: determining a number of data words required to communicate the set of data to the remote device along the communication channel in accordance with a first logical combination which multiplies the magnitudes (AMag, BMag, . . . nMag) of the ranges with each other to produce a multiplied range magnitude, and which successively divides a number of times the multiplied range magnitude by a number (R) of available different values that can be transferred in a data word along the communication channel to yield zero quotient, said number of times constituting the number of data words required to communicate said set of data.

Claim 4

The method according to claim 2 comprising the additional steps of: communicating the number (R) of available different values to the remote device along the communication channel; and determining the values of the data words to send to said remote device in accordance with a second logical combination which successively divides the value (V) by the number (R) to yield remainder quantities for transfer to the remote device along the communication channel.

Claim 5

The method according to claim 3 for transferring the values of the data words along a communication channel operable on a set of ASCII codes, the method comprising the additional steps: modifying the values of the data words in accordance with a third logical combination which adds 32 to the value of each data word to produce an altered value of data word, and which adds 33 to any altered value of data word greater than 126; and supplying the modified data words to the remote device.

Claim 6

The method according to claim 3 comprising the additional steps of: accumulating in the remote device a plurality of remainder quantities in sequence; retrieving the accumulated remainder quantities in reverse sequence for reproducing the value (V) in accordance with the inverse of said second logical combination; forming the set of translated data (A, B, . . . , n) from the reproduced value of (V) in accordance with the inverse of said equation; and restoring each member (A', B', . . . n') of the set of data by adding to each member of the set of translated data (A, B, . . . , n) a corresponding offset value (AOffs, BOffs, . . . , nOffs).

Claim 7

Apparatus for transferring a set of data whose members (A', B' . . . n') have selected independent ranges of values between a host computer and a remote device, comprising: means for determining, for each member (A', B', . . . n') of the set of data, a range of values the member may take on, each range having a magnitude (AMag, Bmag, . . . , nMag) indicating the size of the range; means for selecting, for each member (A', B' . . . n') of the set of data, an offset value (AOffs, BOffs, . . . nOffs) associated with said member; a communication channel connected for transferring to the remote device information regarding the magnitudes (AMag, BMag, . . . , nMag) of the ranges and the offsets (AOffs, BOffs, . . . , nOffs) associated with the members of the set of data; deriving means for deriving a set of translated data (A, B, . . . n) by subtracting from each member (A', B', . . . n') of the set of data the offset (AOffs, BOffs, . . . , nOffs) value associated with said member; and means for converting the set of translated data (A, B, . . . n) to a single number (V) in accordance with the equation: ##EQU5##

Claim 8

Apparatus for transferring a set of data whose members (A', B' . . . n') have selected independent ranges of values between a host computer and a remote device, comprising: means for determining, for each member (A', B', . . . n') of the set of data, a range of values the member may take on, each range having a magnitude (AMag, Bmag, . . . , nMag) indicating the size of the range; means for selecting, for each member (A', B' . . . n') of the set of data, an offset value (AOffs, BOffs, . . . nOffs) associated with said member; a communication channel connected for transferring to the remote device information regarding the magnitudes (AMag, BMag, . . . , nMag) of the ranges and the offsets (AOffs, BOffs, . . . , nOffs) associated with the members of the set of data; deriving means for deriving a set of translated data (A, B, . . . n) by subtracting from each member (A', B', . . . n') of the set of data the offset (AOffs, BOffs, . . . , nOffs) value associated with said member; and means for converting the set of translated data (A, B, . . . n) to a single number (V) in accordance with the equation: ##EQU5##

Claim 9

Apparatus according to claim 6 wherein the communication channel includes operating limitations, further comprising: means for determining a number of data words required to communicate the set of data to the remote device along the communication channel in accordance with a first logical combination which multiplies the magnitudes (AMag, BMag, . . . nMag) of the ranges with each other to produce a multiplied range magnitude, and which successively divides a number of times the multiplied range magnitude by a number (R) of available different values that can be transferred in a data word along the communication channel to yield zero quotient, wherein said number of times constituting the number of data words required to communicate said set of data.

Claim 10

Apparatus according to claim 7 further comprising: means for communicating the number (R) of available different values to the remote device along the communication channel; and means for determining the values of the data words to send to said remote device in accordance with a second logical combination which successively divides the value (V) by the number (R) to yield remainder quantities for transfer to the remote device along the communication channel.

Claim 11

Apparatus according to claim 8 for transferring the values of the data words along a communication channel operable on a set of ASCII codes, the apparatus further comprising: means for modifying the values of the data words in accordance with a third logical combination which adds 32 to the value of each data word to produce an altered value of data word, and which adds 33 to any altered value of data word greater than 126.

Claim 12

Apparatus according to claim 8 further comprising: means in the remote device for accumulating a plurality of remainder quantities in sequence; means for retrieving the accumulated remainder quantities in reverse sequence for reproducing the value (V) in accordance with the inverse of said second logical combination; means for forming the set of translated data (A, B, . . . , n) from the reproduced value of (V) in accordance with the inverse of said equation; and means for restoring each member of the set of data (A', B', . . . , n') by adding to each member of the set of translated data (A, B, . . . , n) a corresponding offset value (AOffs, BOffs, . . . , nOffs).