外文翻譯--微型計算機的數(shù)字音頻接口processor-based數(shù)據(jù)記錄系統(tǒng)(文件)
【正文】 e circuit board provides ample room for wire wrap integrated circuit sockets which house the additional ponents shown in Fig. 1. Connections from the added ponents to the existing board may be made with short jumpers soldered to the circuit side of the board. The only other modification required is the removal of power supply voltages from pins 12, 14, 16, and 18 of the 37pin connector so that these lines may be used for VCR control. The 5 V, 12 V, and + 12 V lines are not required and are best interrupted by cutting three circuit board traces near their contacts with the puter bus. Removal of + 5 V from pin 18 requires cutting of two wide traces which approach the top and bottom of the 37pin connector on the ponent side of the board and installation of a jumper to reconnect these two + 5 V traces. The play, stop, and rewind functions of our VCR (model SLHF450。 A MICROCOMPUTER INTERFACE FOR A DIGITAL AUDIO PROCESSORBASED DATA RECORDING SYSTEM THOMAS L. CROXTON, STANLEY J. STUMP, AND WILLIAM McD. ARMSTRONG Department ofPhysiology and Biophysics, Indiana University School ofMedicine, Indianapolis, Indiana 46223 ABSTRACT An inexpensive interface is described that performs direct transfer of digitized data from the digital audioprocessor and video cassette recorder based data acquisition system designed by Bezanilla (1985, Biophys. J.,47:437441) to an IBM PC/XT microputer. The FORTRAN callable software that drives this interface is capableof controlling the video cassette recorder and starting data collection immediately after recognition of a segment ofpreviously collected data. This permits piecewise analysis of long intervals of data that would otherwise exceed thememory capability of themicroputer. The high capacity data recording system designed by (1985) is of great value to practitioners ofsinglechannel recording since it allows storage of two channels of very precise data (16 bit resolution), sampled at an acceptably fast rate (44,100 samples/s), for extended periods of time (up to 3 h). We have, however, encountered technical problems which limit the puterized analysis of data recorded in this way. In particular, when the data are played back it is difficult to accurately or reproducibly select a given interval of data for storage in puter memory. This difficulty prompted us to develop an interface between Bezanilla39。 一個高容量的數(shù)據(jù)記錄設備的基于數(shù)字音頻處理器和一個視頻盒式錄音機。我 們相信這次失敗源于誤讀錄像。一個軟件定時器是用來控制的時間 optoisolator 激活與時間之間錄像機的命令。 7442BCDtoDecimal 轉(zhuǎn)換器是用來 demultiplex 這些兩位。我們建議調(diào)用程序確認這些 8 點都是相同的到最后的 8分 42point 標記。如果一個特定數(shù)目的一半比賽發(fā)生在總找到匹配的子程序中流產(chǎn)返回一個錯誤代碼。最重要的每一個采樣點的觀點是旋轉(zhuǎn)成一個 32 位的一對寄存器和對比模板。當所需資料收集停止數(shù)量的段落的數(shù)據(jù)已經(jīng)存儲。單詞是搭成的數(shù)據(jù)端口 A 和 B 時鐘信號通過直接選擇比特 2和 4港口 0 C 點微機樣品港口 C(INTR B)當數(shù)據(jù)來確定詞被抓住了。 軟件驅(qū)動數(shù)據(jù)傳輸正在寫的宏匯編 ,是微軟打算聯(lián)系微軟 FORTRAN 調(diào)用程序。激活的 optoisolators 相當于沉悶相應的開 關(guān) ,錄放影機。修改這個錄像機僅含安裝了一個六角五連接器。 5 V 12 V,和 + 12 V 線路 ,最好是不需要被中斷割下了 3 電路板靠近他們接觸痕跡計算機總線。 Metra
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