CA2232826A1 - Protected programmable memory cartridge and computer system using same - Google Patents
Protected programmable memory cartridge and computer system using sameInfo
- Publication number
- CA2232826A1 CA2232826A1 CA2232826A CA2232826A CA2232826A1 CA 2232826 A1 CA2232826 A1 CA 2232826A1 CA 2232826 A CA2232826 A CA 2232826A CA 2232826 A CA2232826 A CA 2232826A CA 2232826 A1 CA2232826 A1 CA 2232826A1
- Authority
- CA
- Canada
- Prior art keywords
- control circuit
- memory
- bus
- lock control
- coprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A computer system for high-performance video and audio manipulations comprising a locked memory cartridge and an audio/video/compact disk (CD) drive controller/coprocessor. The computer system has a central processing unit (CPU) with at least one bus associated therewith, with the bus having at least one bus line. The cartridge comprises a readable memory, a memory control circuit, a lock control circuit, and a connector all in circuit communication with each other. The connector allows the memory, the memory control circuit, and the lock control circuit to be pluggably connected in circuit communication with the CPU. The memory control circuit scrambles some of the bus lines, thereby scrambling the data in the memory on reset, and unscrambles the bus lines responsive to inputs from the lock control circuit. The lock control circuit monitors the bus, waiting for a proper combination of bus values to be asserted onto the bus, at which time the lock control circuit causes the memory control circuit to unscramble the bus lines.
The audio/video/CD drive controller/coprocessor comprises a CPU interface, a CPU cache, a memory controller, a memory bus arbitrator, a DRAM refresher, a video controller, a CD
drive controller, a digital signal processor (DSP) sound coprocessor, and a "blitter"
graphics coprocessor in an integrated package.
The audio/video/CD drive controller/coprocessor comprises a CPU interface, a CPU cache, a memory controller, a memory bus arbitrator, a DRAM refresher, a video controller, a CD
drive controller, a digital signal processor (DSP) sound coprocessor, and a "blitter"
graphics coprocessor in an integrated package.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/168,675 US5666516A (en) | 1993-12-16 | 1993-12-16 | Protected programmable memory cartridge having selective access circuitry |
US08/168,675 | 1993-12-16 | ||
CA002130979A CA2130979C (en) | 1993-12-16 | 1994-08-26 | Protected programmable memory cartridge and computer system using same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002130979A Division CA2130979C (en) | 1993-12-16 | 1994-08-26 | Protected programmable memory cartridge and computer system using same |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2232826A1 true CA2232826A1 (en) | 1995-06-17 |
CA2232826C CA2232826C (en) | 2000-12-12 |
Family
ID=25677455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002232826A Expired - Fee Related CA2232826C (en) | 1993-12-16 | 1994-08-26 | Protected programmable memory cartridge and computer system using same |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2232826C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11914756B2 (en) | 2018-08-03 | 2024-02-27 | Micron Technology, Inc. | Data protection in computer processors |
-
1994
- 1994-08-26 CA CA002232826A patent/CA2232826C/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11914756B2 (en) | 2018-08-03 | 2024-02-27 | Micron Technology, Inc. | Data protection in computer processors |
Also Published As
Publication number | Publication date |
---|---|
CA2232826C (en) | 2000-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |