KR920004977A - Memory Expansion Units in Personal Computers - Google Patents

Memory Expansion Units in Personal Computers Download PDF

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Publication number
KR920004977A
KR920004977A KR1019900013661A KR900013661A KR920004977A KR 920004977 A KR920004977 A KR 920004977A KR 1019900013661 A KR1019900013661 A KR 1019900013661A KR 900013661 A KR900013661 A KR 900013661A KR 920004977 A KR920004977 A KR 920004977A
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KR
South Korea
Prior art keywords
address
inverter
time clock
real
clock device
Prior art date
Application number
KR1019900013661A
Other languages
Korean (ko)
Inventor
박상복
Original Assignee
한태희
주식회사 금성사
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 한태희, 주식회사 금성사 filed Critical 한태희
Priority to KR1019900013661A priority Critical patent/KR920004977A/en
Publication of KR920004977A publication Critical patent/KR920004977A/en

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Abstract

내용 없음No content

Description

퍼스날 컴퓨터에서의 메모리 확장 장치Memory Expansion Units in Personal Computers

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 상세 회로도.1 is a detailed circuit diagram of the present invention.

제2도는 본 발명 및 종래의 장치의 동작을 설명하기 위한 타임챠트.2 is a time chart for explaining the operation of the present invention and the conventional device.

Claims (1)

실시간 클럭장치(1)의 일정한 어드레스를 래치하도록 하는 어드레스 래치 인에이블 신호(RTCALE)를 반전시켜 래치회로(10)의 클럭단자(CLK)에 인가시키는 인버터(13)와, 사이 인버터(13)를 통해 반전된 어드레스 래치 인에이블 신호(RTCALE)를 인가받아 기존의 실시간 클럭장치(1)에 인가되는 색인 어드레스 만을 래치하는 래치회로(10)와, 상기 래치회로(10)에 의해 래치된 색인 어드레스의 값에 따라 확장 메모리 S램(12)의 번지를 액세스 할 것인가를 결정하도록 인버터(11a)와 오어게이트(OR1)로 된 제1로직부(11)와, 상기 제1로직부(11)의 출력값과 실시간 클럭장치(1)의 스트로부 단자(RD*: DS)와 판독/기록단자(R/W*)에 인가되는 상기 로직부(2)의 출력값에 따라 확장 메모리 S램(12)의 데이타(D0-D7)를 출력 또는 차단시키도록 오어게이트(OR2,OR3)로 제어하는 제2로직부(14)와, 상기 실시간 클럭장치(1)내 메모리의 색인 어드레스가 지정되어 있는 번지 이상일때 추가된 데이타를 저장시키는 증설 메모리용 S램(12)을 구비하여 이루어지는 것을 특징으로 하는 퍼스날 컴퓨터에서의 메모리 확장 장치.An inverter 13 for inverting the address latch enable signal RTCALE for latching a constant address of the real time clock device 1 and applying it to the clock terminal CLK of the latch circuit 10, and an inverter 13 between the inverter 13 A latch circuit 10 for latching only an index address applied to the existing real-time clock device 1 by receiving the address latch enable signal RTCALE inverted through the second latch enable signal RTCALE, and the index address latched by the latch circuit 10. The first logic part 11 of the inverter 11a and the OR gate OR 1 , and the first logic part 11 of the first logic part 11 to determine whether to access the address of the expansion memory S RAM 12 according to the value. According to the output value and the output value of the logic unit 2 applied to the straw portion terminal RD * : DS and the read / write terminal R / W * of the real-time clock device 1, Second logic to control by or gates (OR 2 , OR 3 ) to output or block data (D 0 -D 7 ) In the personal computer characterized in that it comprises an expansion memory SRAM 12 for storing added data when the index address of the memory in the real-time clock device 1 is greater than or equal to a designated address. Memory expansion unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900013661A 1990-08-31 1990-08-31 Memory Expansion Units in Personal Computers KR920004977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900013661A KR920004977A (en) 1990-08-31 1990-08-31 Memory Expansion Units in Personal Computers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900013661A KR920004977A (en) 1990-08-31 1990-08-31 Memory Expansion Units in Personal Computers

Publications (1)

Publication Number Publication Date
KR920004977A true KR920004977A (en) 1992-03-28

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ID=67542516

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900013661A KR920004977A (en) 1990-08-31 1990-08-31 Memory Expansion Units in Personal Computers

Country Status (1)

Country Link
KR (1) KR920004977A (en)

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