JPS62151282U

JPS62151282U -

Info

Publication number: JPS62151282U
Application number: JP3618486U
Authority: JP
Priority date: 1986-03-14
Filing date: 1986-03-14
Publication date: 1987-09-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る映像メモリボ
ードの概略構成図、第２図は同映像メモリボード
のブロツク図、第３図はメモリバンクの説明図で
ある。１……入力信号変換部、２……映像メモリ部、
３……出力信号変換部、４……パソコンのＣＰＵ
、５……カラーテレビ、１１……アナログＲ・Ｇ
・Ｂ変換器、１２ａ・１２ｂ・１２ｃ……ＡＤ変
換器、２１ａ，２１ｂ・２１ｃ……マルチポート
ＲＡＭ、２２……シリアル入力ポート、２３……
パラレル入出力ポート、２４……シリアル出力ポ
ート、２５……メモリバンク選択回路、３１ａ・
３１ｂ・３１ｃ……ＤＡ変換器、３２……ＮＴＳ
Ｃ変換器。 FIG. 1 is a schematic configuration diagram of a video memory board according to an embodiment of the present invention, FIG. 2 is a block diagram of the video memory board, and FIG. 3 is an explanatory diagram of a memory bank. 1...Input signal conversion section, 2...Video memory section,
3...Output signal converter, 4...PC CPU
, 5...Color TV, 11...Analog R/G
・B converter, 12a, 12b, 12c...AD converter, 21a, 21b, 21c...multiport RAM, 22...serial input port, 23...
Parallel input/output port, 24... Serial output port, 25... Memory bank selection circuit, 31a.
31b/31c...DA converter, 32...NTS
C converter.

Claims

[Scope of Claim for Utility Model Registration] (1) A one-board type video memory board inserted into an expansion board slot of a personal computer, which inputs a color video composite signal and converts it into analog R, G, and B signals. Analog R・G・B converter and the above analog R・G・B
an input signal converter comprising an AD converter that AD converts a signal into a digital video signal having a required level of gradation for each of R, G, and B; and storing the digital video signal for at least one screen by serial input. A video memory section; and an output signal conversion section having a DA converter that performs DA conversion on a digital video signal read out from the video memory section by serial output and converts it into an analog R, G, B signal; The memory section includes a serial input port that can serially input digital video signals from the input signal converter, a parallel input/output port that can input and output signals from the CPU of the personal computer in parallel, and a memory section that transmits stored contents to the output signal converter. A video memory board comprising a multi-port RAM having a serial output port capable of serial output. (2) A video memory board as set forth in claim (1) of the utility model registration claim, in which the video memory section is connected to a CPU.
A device having a memory bank selection circuit that selects a memory bank command that enables the video memory section from among memory bank commands from the memory bank command.