Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
1 A method of retrieving picture elements from a character generating memory for display of a symbol, comprising the steps of providing a first plurality of bits of a display character code as part of an address to an address input of the character generator memory, comparing another bit of the display character code with a compare bit, and substituting a plurality of bits for the another bit of the display character code as another part of the address to the address input of the memory, in accordance with whether or not the another bit compares with compare bit, in order to select a symbol which is special to a particular language.
Claim 2
Dependent Claim
112 words
1 A method of retrieving picture elements from a character generating memory for display of a symbol, comprising the steps of providing a first plurality of bits of a display character code as part of an address to an address input of the character generator memory, comparing another bit of the display character code with a compare bit, and substituting a plurality of bits for the another bit of the display character code as another part of the address to the address input of the memory, in accordance with whether or not the another bit compares with compare bit, in order to select a symbol which is special to a particular language.
Claim 3
Dependent Claim
28 words
2 A method according to claim 1, in which two bits of the display character code are compared with compare bits and substituted by three bits, if appropriate.
Claim 4
Dependent Claim
42 words
3 A method according to claim 1 or 2, including storing, responsive to at least one bit of display character code, a plurality of bits of the display character code as compare bit and substitute bits for another display character code (Fig.4).
Claim 5
Dependent Claim
94 words
4 A character generator including a memory for storing the picture elements of a set of characters for display, characterised by a register (111) for storing at least n+1 bits, compare means (113,115,117) for comparing the n high order bits of a character code as part of an address to an address input of the character generator (23) memory with the n bits stored in the register, and logic means (121, 123, 127, 129, 131) responsive to the output of the compare means for gating n+1 bits to the address input of the memory.
Claim 6
Dependent Claim
94 words
4 A character generator including a memory for storing the picture elements of a set of characters for display, characterised by a register (111) for storing at least n+1 bits, compare means (113,115,117) for comparing the n high order bits of a character code as part of an address to an address input of the character generator (23) memory with the n bits stored in the register, and logic means (121, 123, 127, 129, 131) responsive to the output of the compare means for gating n+1 bits to the address input of the memory.
Claim 7
Dependent Claim
65 words
5 A generator according to claim 4, in which the memory has a common symbol area, a default special symbol area, and at least one selectable special symbol area, n bits of the register designate the default special symbol area, and the logic means includes substitution means responsive to the compare means for providing n+l address bits designating one of the selectable special symbol areas.
Claim 8
Dependent Claim
30 words
6 A generator according to claim 4 or 5, in which the register comprises a compare field for storing n bits and a substitution field for storing n+1 substitution bits.
Claim 9
Dependent Claim
32 words
7 A generator according to claim 4, 5 or 6, comprising control logic for storing in the register a plurality of bits of a display character code which is a display order.