Patent EP0456410A2 successfully refreshed from Google Patents.
EP0456410A2
Expired / Lapsed
EP
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Adapter card
Assignee: International Business Machines Corp
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Filing: 1991-05-01
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Granted: —
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Expires: 2011-05-01
Abstract
Abstract An adapter card is provided capable of functioning either as a mainframe interactive circuit unit or as a display adapter for a personal computer, comprising a microprocessor; a display control device; a communication control device connectable to a host processor through a communication line; a system bus inter connecting said microprocessor; said display control device and said communication control device; a connector connectable to an input/output connecting slot of a data processing apparatus; and an interface circuit connected between said system bus and said connector. <IMAGE>
Inventors
- 👤 Mutsami Aramaki
- 👤 Yasukazu Isobe
- 👤 Tetsune Toyokawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:30
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F13/00; G06F13/38; G06F13/382; G06F13/385; G09; G09G; G09G5/00; G09G5/003; G09G5/006
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
An adapter and comprising: a microprocessor, a display control device, a communication control device connectable to a host processor through a communication line; a system bus interconnecting said microprocessor, said display control device and said communication control device; a connector connectable to an input/output connecting slot of a data processing apparatus; and an interface circuit connected between said system bus and said connector.
Claim 2
Dependent Claim
59 words
An adapter card as claimed in Claim 1, wherein said connector includes an input connector element connected to said microprocessor, said microprocessor, at power on, determining whether an inhibit signal is supplied to said input connector element, or not, and on its detecting said inhibit signal terminating its operation after performing a diagnostic test of said control circuit unit.
Claim 3
Dependent Claim
30 words
An adapter card as claimed in Claim 2, wherein said inhibit signal is received from said data processing apparatus through said input/output connecting slot to which said connector is connected.
Claim 4
Dependent Claim
64 words
An adapter card as claimed in any preceding claim wherein said connector includes a video signal connector element, the adapter card including a switching means having first input connected to said display control device, second input connected to said video signal connector element, and an output connectable to a display device; and wherein said display control device controls the operation of the switching means.
Claim 5
Dependent Claim
56 words
An adapter card as claimed in Claim 4, wherein on detecting non-existence of the inhibit signal at said input connector element said microprocessor supplies to said display control device a control signal for connecting said first input to said output of said switching means controls operation of said display control device and said communication control device.
Claim 6
Dependent Claim
25 words
A data processing system comprising an adapter card as claimed in any preceding claim, a keyboard connected to the adapter card and a display device.
Claim 7
Dependent Claim
127 words
Data processing apparatus comprising: a control unit including first microprocessor, first display control device, an input/output connecting slot, and first system bus connecting said first microprocessor, said first display control device and said input/output connecting slot; and a circuit board including a communication control device, second microprocessor, second display control device, second system bus connecting said communication control device, said second microprocessor and said second display control device, a connector connected to said input/output connecting slot of said control unit, and an interface circuit connected between said connector and said second system bus; said second microprocessor responding an inhibit signal sent from said control unit to terminate its operation, and said first microprocessor controlling the operation of said circuit board through said connector and said interface circuit.
Claim 8
Dependent Claim
67 words
Data processing apparatus as claimed in Claim 7, wherein said circuit board includes a switching means having first input connected to said second display control device, second input connected to a video signal connector element of said connector, and an output connected to a display device, and said second display control device responds to a control signal sent from said first microprocessor to control said switching means.
Claim 9
Dependent Claim
63 words
Data processing apparatus as claimed in Claim 8, wherein said connector includes an input connector element connected to said second microprocessor, and said second microprocessor, at powered on, determines as to whether said inhibit signal is supplied to said input connector element, or not, and terminates, on detection of said inhibit signal, its operation after performing a diagnostic test of said circuit board.
Claim 10
Dependent Claim
71 words
Data processing apparatus as claimed in Claim 9, wherein a high resolution display device is connected to said output of said switching means, said first microprocessor, in a text mode, supplies a control signal to said second display control device for connecting said first input to said output of said switching means to supply high resolution video signals generated by said second display control device to said high resolution display device.
Claim 11
Dependent Claim
26 words
Data processing apparatus as claimed in claim 10, wherein said first microprocessor supplies character codes to a character code buffer of said second display control device.
Claim 12
Dependent Claim
60 words
Data processing apparatus as claimed in claim 11, wherein said first microprocessor, in an all point addressable graphic mode, supplies a control signal to said second display control device for connecting said second input to said output of said switching means to supply low resolution video signals generated by said first display control device to said high resolution display device.
Claim 13
Dependent Claim
27 words
Data processing apparatus as claimed in claim 12, wherein said first microprocessor supplies image data to an all point addressable buffer in said first display control device.
References Cited (Backward Citations)
No citation records indexed.
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