US4010449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mos computer employing a plurality of separate chips
Assignee: Intel Corp
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Filing: 1974-12-31
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Granted: 1977-03-01
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Expires: 1994-12-31
Abstract
Abstract A metal-oxide-semiconductor (MOS) computer wherein the bidirectional data bus lines which communicate with the central processing unit (CPU) are also utilized to convey CPU status information to a status latch, thereby eliminating pin connections otherwise required to convey status information from the CPU. A special jump instruction of all zeroes or ones is used eliminating components associated with the prior art application of such instructions to the CPU.
Inventors
- 👤 Federico Faggin
- 👤 Masatoshi Shima
- 👤 Stanley Mazor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:42
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/76; G06F15/78; G06F15/7839; G06F15/7864
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
In an MOS computer employing a plurality of separate chips including a separate central processing unit chip (CPU chip) and a plurality of bidirectional data bus lines coupled to said CPU chip and one or more of said plurality of separate chips, the improvement comprising: a CPU status storage means for storing signals representative of the status of said CPU chip; and a plurality of lines coupled to said CPU status storage means and said bidirectional data bus lines for interconnecting said bidirectional data bus lines with said CPU status storage means: whereby said signals representative of the status of said CPU chip are communicated to said CPU status storage means through said bidirectional data bus lines.
Claim 2
Dependent Claim
117 words
In an MOS computer employing a plurality of separate chips including a separate central processing unit chip (CPU chip) and a plurality of bidirectional data bus lines coupled to said CPU chip and one or more of said plurality of separate chips, the improvement comprising: a CPU status storage means for storing signals representative of the status of said CPU chip; and a plurality of lines coupled to said CPU status storage means and said bidirectional data bus lines for interconnecting said bidirectional data bus lines with said CPU status storage means: whereby said signals representative of the status of said CPU chip are communicated to said CPU status storage means through said bidirectional data bus lines.
Claim 3
Dependent Claim
20 words
The improvement defined by claim 1 including a strobe signal line interconnecting said CPU with said CPU status storage means.
Claim 4
Dependent Claim
75 words
An MOS computer comprising: A central processing unit (CPU) disposed on a first chip, said CPU including a decoder for recognizing a jump instruction, said jump instruction comprising bits of only the same logic state; at least one memory disposed on a second chip; a plurality of bidirectional data bus lines interconnecting said CPU with said memory; and circuit means coupled to said bidirectional data bus lines for applying to said lines said jump instruction.
Claim 5
Dependent Claim
75 words
An MOS computer comprising: A central processing unit (CPU) disposed on a first chip, said CPU including a decoder for recognizing a jump instruction, said jump instruction comprising bits of only the same logic state; at least one memory disposed on a second chip; a plurality of bidirectional data bus lines interconnecting said CPU with said memory; and circuit means coupled to said bidirectional data bus lines for applying to said lines said jump instruction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |