Display system

Claim 2

In a continuous display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line locations of said memory, means for altering the display location of said data by a line comprising; means for establishing the address of the last line location at which it is desired to terminate the alteration operation, address means for establishing a character address in memory from which readout of said character is to occur, means for incrementing the address of said address means to sequence through the addresses of successive characters and successive lines of characters, means for successively reading data character by character from one line of memory whose address is provided by said address means and for writing it back into memory at another line, detecting means for recognizing coincidence between the address established by said means for establishing and the address reached by said address means and producing a coincidence signal responsive thereto, means responsive to said coincidence signal for writing zeros into the last line location of memory from which readout occurs, and means responsive to said coincidence signal and the completion of the writing of zeros in the last line for terminating operation of said previously recited means whereby said data upon subsequent readout is displayed, displaced by a line.

Claim 3

In a continuous display system as recited in claim 1 wherein said address means includes: a first counter means for indicating the line address of a character and a second counter means for indicating the address of the character along a line, said means for successively reading data includes means for generating alternate read strobe and write strobe signals, memory control means responsive to a read strobe signal and the address indicated by said first and second counters to read a character out of said memory from said address and responsive to a write strobe signal and the address indicated by said first and second counters to write the character read out of said memory back into memory at the address indicated by said first and second counters, first address change means responsive to said read strobe signal to alter the count of said first counter means before the occurrence of the succeeding write strobe signal, and second address change means responsive to said write strobe signal to alter the count of said second counter means before the occurrence of the succeeding read strobe signal.

Claim 4

In a continuous display system as recited in claim 2 wherein said first address change means includes means for increasing the count of said first counter means, and said second address change means includes means for decreasing the count of said second counter means.

Claim 5

In a continuous display system as recited in claim 2 wherein said first address change means includes means for decreasing the count of said first counter means, and said second address change means includes means for increasing the count of said second counter means.

Claim 6

In a display system wherein characters of data are stored in a memory at address locations, each of which corresponds to an address location on the face of a display tube upon which the data will be displayed, each character of said data having an address location in the form of a horizontal position along a line designated by Xa where ''''a'''' is a number indicating the position along a line and a vertical position designated by ''''Yb'''' where ''''b'''' is a number indicating the vertical position of said line, there being a cursor address means for providing addresses for write into memory, a display address means for providing addresses for readout of memory for display, and a memory address means for addressing said memory for write in responsive to said cursor address means or read out responsive to said display address means, means for altering the address of said data in said memory by a line and for enabling data display at said new line address comprising; means for applying only said cursor address means output to said memory address means for readout as well as write in, means for alternately ordering a readout of a character from memory and a write back of said character in memory, means responsive to said means for alternately ordering for changing said cursor address means in sequence after a read out from Xa, Yb to Xa, Yb-1; and then after a write in to Xa+1, Yb, then after a readout to Xa+1, Yb-1, then after a write in to Xa+2, Yb, . . . until the address Xa+n, Yb-n has been reached, where Xa,+nis the X address of the last character in memory and Yb-n is the Y address of the last character in memory, means for sensing when the address of a last line of characters in said memory is reached, means responsive to the output of the means for sensing for erasing said last line of characters after it has been read, and means responsive to the erasure of said last line of characters for terminating the operation of all of said aforesaid means.

Claim 7

In a display system wherein characters of data are stored in a memory at address locations, each of which corresponds to an address location on the face of a display tube upon which the data will be displayed, each character of said data having an address location in the form of a horizontal position along a line designated by Xa where ''''a'''' is a number indicating the position along a line and a vertical position designated by ''''Yb'''' where ''''b'''' is a number indicating the vertical position of said line, there being a cursor address means for providing addresses for write into memory, a display address means for providing addresses for readout of memory for display, and a memory address means for addressing said memory for write in responsive to said cursor address means or read out responsive to said display address means, means for altering the address of said data in said memory by a line and for enabling data display at said new line address comprising; means for applying only said cursor address means output to said memory address means for readout as well as write in, means for alternately ordering a readout of a character from memory and a write back of said character in memory, means responsive to said means for alternately ordering for changing said cursor address means in sequence after a read out from Xa, Yb to Xa, Yb-1; and then after a write in to Xa+1, Yb, then after a readout to Xa+1, Yb-1, then after a write in to Xa+2, Yb, . . . until the address Xa+n, Yb-n has been reached, where Xa,+nis the X address of the last character in memory and Yb-n is the Y address of the last character in memory, means for sensing when the address of a last line of characters in said memory is reached, means responsive to the output of the means for sensing for erasing said last line of characters after it has been read, and means responsive to the erasure of said last line of characters for terminating the operation of all of said aforesaid means.

Claim 8

In a display system wherein characters of data are stored in a memory at address locations, each of which corresponds to an address location on the face of a display tube upon which the data will be displayed, each character of said data having an address location in the form of a horizontal position along a line designated by Xa where ''''a'''' is a number indicating the position along a line and a vertical position designated by Yb where ''''b'''' is a number indicating the vertical position of said line, there being a cursor address means for providing addresses for write into memory, a display address means for providing addresses for readout of memory for display, and a memory address means for addressing said memory for write in responsive to said cursor address means or read out responsive to said display address means, means for altering the address of said data in said memory by a line and for enabling data display at said new line address comprising; means for applying only said cursor address means output to said memory address means for read out as well as write in, means for alternately ordering a read out of a character from memory and a write back of said character in memory, means responsive to said means for alternately ordering for changing the address of said cursor address means in sequence after readout from Xa, Yb to Xa, Yb+1, then after a write in to Xa+1, Yb then after a readout to Xa+1, Yb+1, then after a write in to Xa+2,Yb, . . . until the address Xa+n, Yb+n, has been reached where Xa+n, Yb30 n is the X, Y address of the character in memory at which it is desired to terminate the operation, means for sensing when the address of a last line of characters in said memory is reached, means responsive to the output of the means for sensing for erasing said last line of characters after it has been read, and means responsive to the erasure of the last line of characters for terminating the operation of all of said aforesaid means.

Claim 9

In a display system wherein characters of data are stored in a memory at address locations, each of which corresponds to an address location on the face of a display tube upon which the data will be displayed, each character of said data having an address location in the form of a horizontal position along a line designated by Xa where ''''a'''' is a number indicating the position along a line and a vertical position designated by Yb where ''''b'''' is a number indicating the vertical position of said line, there being a cursor address means for providing addresses for write into memory, a display address means for providing addresses for readout of memory for display, and a memory address means for addressing said memory for write in responsive to said cursor address means or read out responsive to said display address means, means for altering the address of said data in said memory by a line and for enabling data display at said new line address comprising; means for applying only said cursor address means output to said memory address means for read out as well as write in, means for alternately ordering a read out of a character from memory and a write back of said character in memory, means responsive to said means for alternately ordering for changing the address of said cursor address means in sequence after readout from Xa, Yb to Xa, Yb+1, then after a write in to Xa+1, Yb then after a readout to Xa+1, Yb+1, then after a write in to Xa+2,Yb, . . . until the address Xa+n, Yb+n, has been reached where Xa+n, Yb30 n is the X, Y address of the character in memory at which it is desired to terminate the operation, means for sensing when the address of a last line of characters in said memory is reached, means responsive to the output of the means for sensing for erasing said last line of characters after it has been read, and means responsive to the erasure of the last line of characters for terminating the operation of all of said aforesaid means.

Claim 10

In a continuous display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line location addresses in said memory, means for shifting said data downward by a line comprising: means for establishing an address corresponding to a location on said display tube at which it is desired to terminate a downshift operation, means for reading data from said memory commencing with the address of data stored in the next to the last line in memory, reading each line of data above the next to the last line out of said memory and writing each line of data back into the line location immediately below the line from which readout has occurred, coincidence detecting means for detecting when the address of the line which is read from memory is the same as the address which was established and producing a signal, means for erasing the line of data which is stored at the address for terminating said downshift operation responsive to said coincidence detecting means signal, and means rendered operative when said line of data has been erased for terminating further operation of all of the aforesaid means to terminate said downshift operation.

Claim 11

In a continuous display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line location addresses in said memory, means for shifting said data downward by a line comprising: means for establishing an address corresponding to a location on said display tube at which it is desired to terminate a downshift operation, means for reading data from said memory commencing with the address of data stored in the next to the last line in memory, reading each line of data above the next to the last line out of said memory and writing each line of data back into the line location immediately below the line from which readout has occurred, coincidence detecting means for detecting when the address of the line which is read from memory is the same as the address which was established and producing a signal, means for erasing the line of data which is stored at the address for terminating said downshift operation responsive to said coincidence detecting means signal, and means rendered operative when said line of data has been erased for terminating further operation of all of the aforesaid means to terminate said downshift operation.

Claim 12

In a continuous display system for successively reading data out of memory and displaying it, wherein a memory stores data in the form of characters in predetermined lines of characters and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line location addresses in memory, means for shifting said data upward by a line comprising: means for storing an address corresponding to the location of the last line of data displayed on said display tube, means for reading data from said memory commencing with a desired line address and successively reading each line of data below said desired line address and writing each line of data back in said memory at a line address above the location address from which a line of data is read out, coincidence detecting means for detecting when the address of the line which is read from memory is the same as the address which is stored, means for erasing the line of data which is stored at the address of the last line of data in said memory responsive to said coincidence detecting means signal, and means for terminating further operation of all of the foregoing means after said line of data is erased to terminate said upshift operation.

Claim 13

In a continuous display system for successively reading data out of memory and displaying it, wherein a memory stores data in the form of characters in predetermined lines of characters and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line location addresses in memory, means for shifting said data upward by a line comprising: means for storing an address corresponding to the location of the last line of data displayed on said display tube, means for reading data from said memory commencing with a desired line address and successively reading each line of data below said desired line address and writing each line of data back in said memory at a line address above the location address from which a line of data is read out, coincidence detecting means for detecting when the address of the line which is read from memory is the same as the address which is stored, means for erasing the line of data which is stored at the address of the last line of data in said memory responsive to said coincidence detecting means signal, and means for terminating further operation of all of the foregoing means after said line of data is erased to terminate said upshift operation.

Claim 14

In a continuous display system for successively reading data out of memory and displaying it wherein a memory stores data in the form of characters at addresses established by line and position along a line, said memory being addressed for write in and read out by a line counter means and a character counter means, and data read out of said memory is displayed on the face of a display tube at line locations and locations along a line corresponding to the line location addresses in said memory, means for shifting said data display and storage downward by a line comprising: means for establishing the address at which it is desired to terminate, means for causing said line counter means to increase its count until it indicates the address of the next to the last line in said memory, means for reading out of memory a character at the address indicated by said line and character counter means, means for increasing The count of said line counter means by one count, means for writing said readout character back in memory at the new address established by said line and character counter means, means for decreasing the count of said line counter by one count and for increasing the count of said character counter means by one count, means for detecting when the address of the data being read out of said memory corresponds to said established address and producing a coincidence signal output, means responsive to said coincidence signal for erasing the line of data from memory at said established address, and means responsive to a termination of said coincidence signal to terminate the operation of all of said foregoing means to terminate said downshift operation.

Claim 15

In a continuous display system for successively reading data out of memory and displaying it wherein a memory stores data in the form of characters at addresses established by line and position along a line, said memory being addressed for write in and read out by a line counter means and a character counter means, and data read out of said memory is displayed on the face of a display tube at line locations and locations along a line corresponding to the line location addresses in said memory, means for shifting said data display and storage downward by a line comprising: means for establishing the address at which it is desired to terminate, means for causing said line counter means to increase its count until it indicates the address of the next to the last line in said memory, means for reading out of memory a character at the address indicated by said line and character counter means, means for increasing The count of said line counter means by one count, means for writing said readout character back in memory at the new address established by said line and character counter means, means for decreasing the count of said line counter by one count and for increasing the count of said character counter means by one count, means for detecting when the address of the data being read out of said memory corresponds to said established address and producing a coincidence signal output, means responsive to said coincidence signal for erasing the line of data from memory at said established address, and means responsive to a termination of said coincidence signal to terminate the operation of all of said foregoing means to terminate said downshift operation.

Claim 16

In a continuous display system for successively reading data out of memory and displaying it wherein a memory stores data in the form of characters at addresses established by line and position along a line, said memory being addressed for write in and read out by a line counter means and a character counter means, and data read out of said memory is displayed on the face of a display tube at line locations and locations along a line corresponding to the line location addresses in said memory, means for shifting said data display and storage upward by a line comprising: means for reading out of memory a character at the address indicated by said line and character at the address indicated by said line and character counter means, to be displayed on said display tube, means for decreasing the count of said line counter means by one count, means for writing said displayed character back in memory at the new address established by said line and character counter means, means for increasing the count of said line counter and of said character counter by one count, means for detecting when the address of data being read out of said memory has reached the last line in said memory and producing a coincidence output signal, means responsive to said coincidence signal for erasing the last line of data from said memory, and means responsive to a termination of said coincidence signal to terminate the operation of all of the aforesaid means to terminate said downshift operation.

Claim 17

In a continuous display system for successively reading data out of memory and displaying it wherein a memory stores data in the form of characters at addresses established by line and position along a line, said memory being addressed for write in and read out by a line counter means and a character counter means, and data read out of said memory is displayed on the face of a display tube at line locations and locations along a line corresponding to the line location addresses in said memory, means for shifting said data display and storage upward by a line comprising: means for reading out of memory a character at the address indicated by said line and character at the address indicated by said line and character counter means, to be displayed on said display tube, means for decreasing the count of said line counter means by one count, means for writing said displayed character back in memory at the new address established by said line and character counter means, means for increasing the count of said line counter and of said character counter by one count, means for detecting when the address of data being read out of said memory has reached the last line in said memory and producing a coincidence output signal, means responsive to said coincidence signal for erasing the last line of data from said memory, and means responsive to a termination of said coincidence signal to terminate the operation of all of the aforesaid means to terminate said downshift operation.

Claim 18

In a continuous display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line locations in said memory, the steps of downshifting said data downward by a line comprising: storing the address of a location on said display tube at which it is desired to terminate a downshift operation, reading character by character from memory commencing with the next to the last line in memory and successively for each line of data above the next to the last line, reading a line of data out of said memory, writing each character read from memory back into memory on the line below the line from which data has been read out, detecting when the address of the line which is displayed is the same as the address which was stored and producing a coincidence signal, erasing the line of data which is stored at the address for terminating said downshift operation responsive to said coincidence signal, and terminating further downshift operation at the termination of said coincidence signal.

Claim 19

In a continuous display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line locations in said memory, the steps of downshifting said data downward by a line comprising: storing the address of a location on said display tube at which it is desired to terminate a downshift operation, reading character by character from memory commencing with the next to the last line in memory and successively for each line of data above the next to the last line, reading a line of data out of said memory, writing each character read from memory back into memory on the line below the line from which data has been read out, detecting when the address of the line which is displayed is the same as the address which was stored and producing a coincidence signal, erasing the line of data which is stored at the address for terminating said downshift operation responsive to said coincidence signal, and terminating further downshift operation at the termination of said coincidence signal.

Claim 20

In a display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line locations in said memory, means for shifting said data downward by a line comprising: means for storing the address of a location at which it is desired to terminate a downshift operation, means, commencing with the next to the last line in Memory, and successively for each line of data above the next to the last line, reading a line of data out of said memory and writing it back into the line location immediately below the line from which readout has occurred, coincidence detecting means for detecting when the address of the line which is being written is the same as the address which was stored, means for erasing the line of data which is stored at that address responsive to said coincidence detecting means signal, and means for terminating further downshift operation when said line of data has been erased.

Claim 21

In a display system of the type wherein a memory stores data in the form of characters in predetermined lines of characters, and said data is read out of said memory to be displayed on the face of a display tube at line locations corresponding to the line locations in said memory, means for shifting said data downward by a line comprising: means for storing the address of a location at which it is desired to terminate a downshift operation, means, commencing with the next to the last line in Memory, and successively for each line of data above the next to the last line, reading a line of data out of said memory and writing it back into the line location immediately below the line from which readout has occurred, coincidence detecting means for detecting when the address of the line which is being written is the same as the address which was stored, means for erasing the line of data which is stored at that address responsive to said coincidence detecting means signal, and means for terminating further downshift operation when said line of data has been erased.