What is claimed is:
1. A data processing apparatus comprising:
an instruction memory in which an instruction is stored;
a data memory in which data is stored;
an instruction decoder decoding a fetched instruction,
a memory operation unit connected to said instruction memory, said data memory and said instruction decoder, fetching an instruction stored in said instruction memory, and accessing said data memory according to a decode result of said instruction decoder; and
an integer operation unit carrying out an integer operation according to a decode result of said instruction decoder,
said instruction memory including a plurality of instruction memory banks, said memory operation unit generating a pipeline stage corresponding to selection of an instruction memory bank and a pipeline stage corresponding to instruction readout to carry out pipeline processing when a plurality of instructions are fetched from a plurality of said instruction memory banks.
2. The data processing apparatus according to claim 1, wherein said instruction memory further includes a first bank select circuit decoding an address including a low order address to generate chip select signals of said plurality of instruction memory banks so that a different instruction memory bank of said plurality of instruction memory banks is accessed when instructions at continuous addresses are accessed.
3. The data processing apparatus according to claim 1, wherein said instruction memory further includes a high speed instruction memory,
wherein said memory operation unit generates a pipeline stage corresponding to instruction readout to carry out a pipeline process without generating a pipeline stage corresponding to selection of an instruction memory bank when fetching an instruction from said high speed instruction memory.
4. The data processing apparatus according to claim 1, wherein said data memory includes a plurality of data memory banks,
wherein said memory operation unit generates a pipeline stage corresponding to selection of a data memory bank and a pipeline stage corresponding to data access to carry out a pipeline process when accessing said plurality of data memory banks.
5. The data processing apparatus according to claim 4, wherein said data memory further includes a second bank select circuit decoding an address including a high order address to generate chip select signals of said plurality of data memory banks in order to divide said plurality of data memory banks into two different regions.
6. The data processing apparatus according to claim 5, wherein said second bank select circuit decodes an address including a low order address to generate chip select signals of said plurality of data memory banks so that a different data memory bank in said plurality of data memory banks is accessed when data at continuous addresses in said two different regions are accessed.
7. The data processing apparatus according to claim 4, wherein said data memory further includes a high speed data memory,
wherein said memory operation unit generates a pipeline stage corresponding to data access to carry out a pipeline process without generating a pipeline stage corresponding to selection of a data memory bank when accessing said high speed data memory.
8. The data processing apparatus according to claim 1, wherein said memory operation unit fetches an instruction from said instruction memory via an instruction bus and accesses said data memory via a data bus differing from said instruction bus.
9. The data processing apparatus according to claim 1, wherein said memory operation unit reads out data from said data memory via a data input bus, and writes data into said data memory via a data output bus differing from said data input bus.
10. A data processing apparatus comprising:
an instruction memory in which an instruction is stored;
a data memory in which data is stored;
an instruction decoder decoding a fetched instruction;
a register file;
a memory operation unit connected to an instruction memory, said data memory and said instruction decoder, fetching an instruction stored in said instruction memory, and accessing said data memory according to a decoded result of said instruction decoder; and
an integer operation unit carrying out an integer operation according to a decoded result of said instruction decoder,
said memory operation unit retaining an instruction in a loop of instructions corresponding to a repeat instruction, when said repeat instruction is executed, in a register in said register file, and executing the loop of instructions while fetching an instruction retained in said dedicated register.
11. The data processing apparatus according to claim 10, wherein said register file comprises a processor status word,
wherein said memory operation unit sets a flag in said processor status word at a first execution cycle of said loop, and retains, in the register of said register file, the instruction in the loop of instructions fetched from said instruction memory when said repeat instruction is executed, and
resets said flag in said processor status word at a second execution cycle of said loop, and executes said loop while fetching the instruction retained in said dedicated register.
12. The data processing apparatus according to claim 10, wherein said memory operation unit retains a plurality of instructions in the loop of instructions, when said repeat instruction, in a plurality of registers in said register file, and executes said loop while fetching said plurality of instructions retained in said plurality of dedicated registers.
13. The data processing apparatus according to claim 12, wherein said register file includes a processor status word,
wherein said memory operation unit sets a flag in said processor status word at a first execution cycle of said loop, and retains the plurality of instructions in the loop of fetched from said instruction memory in said plurality of registers, and resets said flag in said processor status word at a second execution cycle of said loop, and executes said loop while fetching said plurality of instructions retained in said plurality of dedicated registers.
14. The data processing apparatus according to claim 10, wherein said instruction memory includes a plurality of instruction memory banks,
wherein said memory operation unit generates a pipeline stage corresponding to selection of an instruction memory bank and a pipeline stage corresponding to instruction readout to carry out a pipeline process when fetching an instruction from said plurality of instruction memory banks.
15. The data processing apparatus according to claim 14, wherein said instruction memory further comprises a first bank select circuit decoding an address including a low order address to generate chip select signals of said plurality of instruction memory banks so that a different instruction memory bank of said plurality of instruction memory banks is accessed when instructions at continuous addresses are accessed.
16. The data processing apparatus according to claim 10, wherein said data memory includes a plurality of data memory banks,
wherein said memory operation unit generates a pipeline stage corresponding to selection of a data memory bank and a pipeline stage corresponding to data access to carry out a pipeline process when said plurality of data memory banks are accessed.
17. The data processing apparatus according to claim 16, wherein said data memory further comprises a second bank select circuit decoding an address including a high order address to generate chip select signals of said plurality of data memory banks in order to divide said plurality of data memory banks into two different regions.
18. The data processing apparatus according to claim 17, wherein said second bank select circuit decodes an address including a low order address to generate a chip select signal of said plurality of data memory banks so that a different data memory bank in said plurality of data memory banks is accessed when data at continuous addresses in said two different regions are accessed.
19. The data processing apparatus according to claim 10, wherein said memory operation unit saves a plurality of registers including said dedicated register and switches a task in a task switch operation.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A wear assembly for attachment to an excavator having a lip with an inner face, an outer face and a front edge face, the wear assembly comprising:
a boss adapted to be fixed to the lip, the boss including a front part having a first face extending generally along the front edge face of the lip, a body extending rearwardly of the front part along one of the inner and outer faces of the lip and a passage that opens to a side by the inner face and to a side by the outer face, the passage including a first bearing surface facing in a generally rearward direction, the front part and the body defining a gap for receipt of the lip with the gap being laterally open at opposite ends of the first face to accommodate a lateral extension of the lip;
a wear member received over the boss and including an aperture generally aligned with the passage, and a second bearing surface associated with the aperture and facing in a generally forward direction; and
a lock received in the aperture and the passage to be in opposition to the first and second bearing surfaces to hold the wear member to the boss.
2. A wear assembly in accordance with claim 1 wherein the front part wraps around the lip and extends partially along at least one of the inner and outer faces opposite the body.
3. A wear assembly in accordance with claim 1 in which the wear member includes a leg that overlies the body, wherein the leg and the body define a cooperative tongue and groove construction whereby the leg is held to the lip.
4. A wear assembly in accordance with claim 3 in which the body defines the tongue and the leg defines the groove.
5. A wear assembly in accordance with claim 3 wherein the body includes at least one holding surface spaced from and facing the lip and the leg includes a retaining member between the holding surface and the lip to hold the wear member to the lip.
6. A wear assembly in accordance with claim 3 wherein the body defines the groove and the leg defines the tongue received in the groove.
7. A wear assembly in accordance with claim 1 wherein the body includes sides extending generally away from the front edge face of the lip, each side including a rail, and each rail including a holding surface spaced from and facing the lip to hold the wear member to the lip.
8. A wear assembly in accordance with claim 7 wherein the body with the rails defines a T-shaped configuration.
9. A wear assembly in accordance with claim 7 wherein the rails have a dovetail configuration.
10. A wear assembly in accordance with claim 7 in which the boss further includes a brace rearward of the body that extends laterally outward of at least a portion of the body and is fixed to the rails.
11. A wear assembly in accordance with claim 10 wherein the brace includes a forwardly facing abutting surface and the leg includes a rear wall that is adapted to abut the abutting surface.
12. A wear assembly in accordance with claim 10 in which the brace extends outward away from the lip farther than the body.
13. A wear assembly in accordance with claim 12 in which the brace includes a generally rearward facing deflector surface that is inclined forward and away from the lip.
14. A wear assembly in accordance with claim 1 in which the wear member includes a third bearing surface to oppose the lock, wherein the second and third bearing surfaces are spaced apart in a direction generally transverse to the lip.
15. A wear assembly in accordance with claim 14 in which the wear member includes a rib to define the third bearing surface and the front part of the boss includes a groove extending therethrough to communicate with the passage, wherein the rib passes through the groove when the wear member is installed on the lip.
16. A wear assembly in accordance with claim 15 wherein the boss further includes a pocket aligned with the groove on an opposite side of the passage to receive the rib when the wear member is installed on the lip.
17. A wear assembly in accordance with claim 1 wherein the wear member includes one of a tongue and groove on each side thereof to mate with an adjacent other one of the wear members attached to the lip.
18. A wear assembly In accordance with claim 1 which the wear member is bifurcated to define spaced apart legs, wherein a first of the legs includes the aperture and a second of the legs includes a rib extending toward the aperture, and wherein the rib includes a third bearing surface to oppose the lock and hold the wear member to the lip.
19. A wear assembly in accordance with claim 1 wherein the lock has front and rear surfaces that are tapered toward a leading end, and wherein the passage and the aperture are each tapered in the same direction to receive the lock.
20. A wear assembly in accordance with claim 19 wherein the lock has a movable latch that engages a keeper in the passage to secure the lock in the assembly.
21. A wear assembly for attachment to an excavator having a lip with an inner face, an outer face and a front edge face, the lip defining a central plane extending medially between the inner and outer faces, the wear assembly comprising:
a boss adapted to be fixed to the lip and including a first bearing surface facing generally in a rearward direction;
a wear member received over the boss and including an aperture, a second bearing surface and a third bearing surface, the second bearing surface being on an inner side of the central plane, and the third bearing surfaces being on an outer side of the central plane, each of the second and third bearing surfaces facing in a generally forward direction; and
a lock received in the aperture to be in opposition to the bearing surfaces to hold the wear member to the boss.
22. A wear assembly in accordance with claim 21 wherein the boss includes a front part that wraps around the lip and extends partially along at least one of the inner and outer faces and a body that extends along the other of the inner and outer sides of the lip.
23. A wear assembly in accordance with claim 22 in which the wear member includes a leg that overlies the body, wherein the leg and the body define a cooperative tongue and groove construction whereby the leg is held to the lip.
24. A wear assembly in accordance with claim 23 in which the body defines the tongue and the leg defines the groove.
25. A wear assembly in accordance with claim 23 in which the body defines the groove and the leg defines the tongue.
26. A wear assembly in accordance with claim 23 wherein the body includes sides extending generally away from the front edge face of the lip, each side including a rail, and each rail including a holding surface spaced from and facing the lip to hold the wear member to the lip.
27. A wear assembly in accordance with claim 26 wherein the body with the rails defines a T-shaped configuration.
28. A wear assembly in accordance with claim 26 wherein the rails have a dovetail configuration.
29. A wear assembly in accordance with claim 26 in which the boss further includes a brace rearward of the body that extends laterally outward of at least a portion of the body and is fixed to the rails.
30. A wear assembly in accordance with claim 29 in which the brace extends outward away from the lip farther than the body.
31. A wear assembly in accordance with claim 21 wherein the boss includes a brace having a forwardly facing abutting surface, and wherein the wear member includes a rear wall that is adapted to abut the abutting surface.
32. A wear assembly in accordance with claim 21 in which the wear member includes a rib to define the third bearing surface.
33. A wear assembly in accordance with claim 32 wherein the boss includes a front surface and a groove that opens in the front surface and extends rearward through a portion of the boss, wherein the rib passes through the groove and into the assembly when the wear member is installed on the lip.
34. A wear assembly in accordance with claim 21 wherein the lock has front and rear surfaces that are tapered toward a leading end, and wherein the aperture is tapered in the same direction to receive the lock.
35. A wear assembly in accordance with claim 34 wherein the lock has a movable latch that engages a keeper in the aperture to secure the lock in the assembly.
36. A wear member for attaching to a lip of an excavator wherein a boss is fixed to the lip, the wear member comprising:
a front working portion; and
a rear mounting portion adapted to overlie the boss when installed on the lip, the rear mounting portion including a pair of legs, a first of the legs including an aperture for receiving a lock therein, and a second of the legs including a rib generally opposed to the aperture and extending toward the aperture, the aperture and the rib each including a face to engage the lock and hold the wear member to the lip.
37. A wear member in accordance with claim 36 further including retaining members with holding surfaces spaced from and facing one of the legs to cooperate with complementary holding surfaces of the boss to hold the leg to the lip.
38. A wear member in accordance with claim 37 wherein the retaining members define a slot into which a portion of the boss is received.
39. A wear member in accordance with claim 38 wherein the retaining members are shaped as dogleg flanges extending outward from one of the legs.
40. A wear member in accordance with claim 39 wherein the retaining members define a tongue to be received in a slot in the boss.
41. A wear member in accordance with claim 36 wherein one of the legs includes at a rear end thereof a deflector face inclined outward and forward from the lip to deflect earthen material away from the wear member when the excavator is moved in a reverse direction.
42. A wear member in accordance with claim 36 wherein the wear member includes one of a tongue and groove on each side thereof to mate with an adjacent another one of the wear members attached to the lip.
43. A wear member in accordance with claim 36 wherein the aperture includes a front wall and a rear wall that taper toward each other.
44. A boss for attachment of a wear member to a lip of an excavator, the lip having an inner face, an outer face and a front edge face interconnecting the inner and outer faces, the boss comprising:
a front part extending along a front edge face of the lip and having a forwardly facing front surface;
a body extending rearwardly of the front part and along one of the inner and outer faces of the lip;
an opening for receiving a lock securing the wear member to the boss; and
a groove in the front part that opens in the front surface and in the opening for the passage of a part of a wear member to the opening to cooperate with the lock.
45. A boss in accordance with claim 44 wherein the front part extends partially along one of the inner and outer faces opposite the body.
46. A boss in accordance with claim 45 in which the front part and the body each includes a hole, wherein the holes are aligned to define the opening in the body.
47. A boss in accordance with claim 46 wherein each of the holes in the front part and the body includes a generally rearward facing bearing surface adapted to abut a lock holding the wear member to the lip.
48. A boss in accordance with claim 44 wherein the body includes sides extending generally away from the front edge face of the lip, each side including a rail, and each rail including a holding surface spaced from and facing the lip to hold a wear member to the lip.
49. A boss in accordance with claim 48 wherein the body with the rails defines a T-shaped configuration.
50. A boss in accordance with claim 48 wherein the rails have a dovetail configuration.
51. A boss in accordance with claim 48 which the boss further includes a brace rearward of the body that extends beyond at least a portion of the body in a transverse direction and is fixed to the rails.
52. A boss in accordance with claim 51 in which the brace extends outward away from the lip farther than the body.
53. A boss in accordance with claim 52 in which the brace includes a generally rearward facing deflector surface that is inclined forward and away from the lip.
54. A boss for attachment of a wear member to a lip of an excavator, the lip having an inner face, an outer face and a front edge face interconnecting the inner and outer faces, the boss comprising:
a body including an inner surface adapted to be fixed to one of the inner and outer faces of the lip, and a pair of spaced rails, each rail including a holding surface spaced outward of the inner surface and facing generally in the same direction as the inner surface to hold a wear member to the lip; and
a brace rearward of the body and having an inner face adapted to be fixed to the lip, and a front face fixed to the rails to provide support therefor.
55. A boss in accordance with claim 54 further including a front part that wraps around the lip and extends partially along at least one of the inner and outer faces opposite the body.
56. A boss in accordance with claim 55 further including an opening for receiving a lock.
57. A boss in accordance with claim 54 wherein the body with the rails defines a T-shaped configuration.
58. A boss in accordance with claim 54 wherein the rails have a dovetail configuration.
59. A boss in accordance with claim 54 further including a front surface and a groove that opens in the front surface and extends rearward into the boss to receive a part of the wear member.
60. A boss for attachment of a wear member to a lip of an excavator, the lip having an inner face, an outer face and a front edge face interconnecting the inner and outer faces, the boss comprising:
a body including an inner surface adapted to be fixed to one of the inner and outer faces of the lip, the body being adapted to be received in a corresponding groove formed in the wear member; and
a brace rearward of the body and having an inner face adapted to be fixed to the lip, and a front face that extends beyond the body in a transverse direction to form an abutment against which a rear wall of the wear member abuts so as to resist rearward deflection of the wear member.
61. A boss in accordance with claim 60 wherein the boss includes rails extending away from the front edge face, each rail defining a rear end, and wherein the brace is fixed to the rear ends of the rails on each said side of the body.
62. A boss in accordance with claim 61 in which the brace extends outward away from the lip farther than the body.
63. A boss in accordance with claim 60 in which the brace extends outward away from the lip farther than the body.
64. A boss in accordance with claim 60 in which the brace includes a generally rearward facing deflector surface that is inclined forward and away from the lip.
65. A wear assembly in accordance with claim 1 in which the boss further includes a brace rearward of the body and extending laterally outward of at least a portion of the body.
66. A wear assembly in accordance with claim 65 wherein the brace includes a forwardly facing abutting surface that abuts the wear member to resist rearwardly directed forces thereon.
67. A wear assembly in accordance with claim 1 wherein the lock has a movable latch to releasably secure the lock in the assembly.
68. A wear assembly in accordance with claim 1 wherein the boss is a one-piece member.
69. A wear assembly in accordance with claim 1 wherein the boss is composed of a plurality of members.
70. A wear assembly in accordance with claim 21 in which the boss further includes a brace rearward of the body and extending laterally outward of at least a portion of the body.
71. A wear assembly in accordance with claim 21 wherein the brace includes a forwardly facing abutting surface that abuts the wear member to resist rearwardly directed forces thereon.
72. A wear assembly in accordance with claim 21 wherein the lock has a movable latch to releasably secure the lock in the assembly.
73. A wear assembly in accordance with claim 21 wherein the boss is a one-piece member.
74. A wear assembly in accordance with claim 21 wherein the boss is composed of a plurality of members.
75. A boss in accordance with claim 44 further including a brace rearward of the body and extending extends laterally outward of at least a portion of the body, the brace having a forwardly facing abutting surface that abuts the wear member to resist rearwardly directed forces thereon.
76. A boss in accordance with claim 44 formed as a one-piece member.
77. A boss in accordance with claim 44 which is composed of a plurality of members.
78. A boss in accordance with claim 54 wherein the brace includes a forwardly facing abutting surface that abuts the wear member to resist rearwardly directed forces thereon.
79. A boss in accordance with claim 54 formed as a one-piece member.
80. A boss in accordance with claim 54 which is composed of a plurality of members.
81. A boss in accordance with claim 60 formed as a one-piece member.
82. A boss in accordance with claim 60 which is composed of a plurality of members.
83. A boss in accordance with claim 60 further comprising a pair of rails, each rail including a holding surface spaced outward of the inner surface and facing generally in the same direction as the inner surface to hold a wear member to the lip.
84. A boss for attachment of a wear member to a lip of an excavator, the lip having an inner face, an outer face and a front edge face interconnecting the inner and outer faces, the boss comprising:
a front part extending along the front edge face of the lip and at least partially extending transversely outward of one of the inner and outer faces of the lip, the front part including a rearward facing end wall transversely outward of one of the inner and outer faces to abut a lock to hold the wear member in place;
a body extending rearward of the front part and along one of the inner or outer faces of the lip, the body being on a side of the lip opposite the end wall of the front part, the body having an inner surface to be fixed to the lip and opposite sidewalls, each sidewall including a rail projecting therefrom and spaced from the inner surface so as to be spaced from the lip when the boss is attached thereto; and
an opening for receiving a lock securing the wear member to the boss.
85. A boss in accordance with claim 84 formed as a one-piece member.
86. A boss in accordance with claim 85 which is composed of a plurality of members.
87. A wear assembly for attachment to an excavator having a lip with an inner face, an outer face and a front edge face, the wear assembly comprising:
a boss adapted to be fixed the lip, the boss including a body extending generally away from the front edge face along one of the inner and outer faces, and a brace rearward of the body and extending transverse to the body, the brace including a forwardly facing abutting surface;
a wear member including a groove to receive the body of the boss, and a rear wall to abut the forwardly facing abutting surface and resist rearward directed forces on the wear member; and
a lock to hold the wear member to the lip.
88. A wear assembly in accordance with claim 87 wherein the body includes rails and the wear member includes grooves for receiving the rails.
89. A wear assembly in accordance with claim 88 wherein the rails are fixed to the brace.
90. A wear assembly in accordance with claim 87 wherein the boss is a one-piece member.
91. A wear assembly in accordance with claim 87 wherein the boss is composed of a plurality of members.
92. A wear assembly in accordance with claim 87 wherein the boss includes a rearward facing bearing surface, and the wear member includes an aperture provided with a bearing surface facing in a generally forward direction, the bearing surfaces of the boss and wear member abut opposite sides of the lock to hold the wear member to the lip.