L61 计算机的设计和质量评价 标准查询与下载

SJ/T 9527-1993 微型数字电子计算机质量分等标准

本标准适用于微型机、学习机及板级产品，是考核微型机、学习机及板级产品质量等级的依据。 本标准必须与GB 9813或企业标准一起使用。

Digital micro-computer--Quality grading standard

ITU-T G.722 ANNEX A-1993 使用64 kbit/s内的7kHz音频编解码器的系统方面

The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecommunication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to

7 kHz Audio-Coding within 64 kbit/s Annex A: Testing Signal-to-Total Distortion Ratio for 7 kHz Audio-Codecs at 64 kbit/s Recommendation G.722 Connected Back-to-Back Study Group XV; 5 pp

IEEE 896.3-1993 IEEE标准的未来总线的推荐规范

IEEE recommended practice for Futurebus+

IEEE 1003.1B-1993 信息技术.便携式操作系统接口(POSIX).第一部分:系统应用程序接口(API).修订1.实时扩展语言

Information technology - Portable operating system interface (POSIX) - Part 1: System application program interface (API); Amendment 1: Realtime extension C language

IEEE 1175-1992 计算系统工具互连的试用标准参考模型

Trial-use standard reference model for computing system tool interconnections

IEEE 1194-1991 底板的电性能

Backplane electrical performance

JIS X 6051:1990 小型计算机系统接口(SCSI)

Small Computer System Interface (SCSI)

IEEE 1118-1990 微机控制系统的串行控制总线

Microcontroller system serial control bus

IEEE 1003.1-1990 信息技术.便携式操作系统接口(POSIX).第一部分:系统应用程序接口(API).C语言

Information technology; portable operating system interface (POSIX); part 1: system application program interface (API) C language

IEEE 1096-1988 高性能多路总线结构.VSB

Multiplexed high-performance bus structure; VSB

IEEE 1014-1987 通用底板总线.VME总线

specifies a high-performance backplane bus for use in microcomputer systems that employ single or multiple microprocessors. It is based on the VMEbus specification, released by the VME Manufacturers' Group in August of 1982. The bus includes four subbuses: data transfer bus, priority interrupt bus, arbitration bus, and utility bus. The data transfer bus supports 8-, 16-, and 32-bit transfers over a nonmultiplexed 32-bit data and address highway. The transfer protocols are asynchronous and fully handshaken. The priority interrupt bus provides real-time interrupt services to the system. The allocation of bus mastership is performed by the arbitration bus, which allows to implement round robin and prioritized arbitration algorithms. The utility bus provides the system with power-up and power-down synchronization. The mechanical specifications of boards, backplanes, subracks, and enclosures are based on IEC 297 specification also known as the Euroboard form factor

Standard for a Versatile Backplane Bus: VMEbus IEEE Computer Society Document

IEEE 961-1987 8-bit微机总线系统;STD总线

8-bit microcomputer bus-system; STD bus

IEEE 754-1985 二进制浮点运算

specifies four formats for representing floating-point values: single-precision (32-bit), double-precision (64-bit), single-extended precision (≥ 43-bit, not commonly used) and double-extended precision (≥ 79-bit, usually implemented with 80 bits). Only 32-bit values are required by the standard; the others are optional. Many languages specify that IEEE formats and arithmetic be implemented, although sometimes it is optional. For example, the C programming language, which pre-dated IEEE 754, now allows but does not require IEEE arithmetic (the C float typically is used for IEEE single-precision and double uses IEEE double-precision).

Binary floating-point arithmetic

HB/Z 148-1989 计算机辅助夹具空间角度计算

本标准规定了计算机辅助夹具空间角度计算各类算法的模型、符号、编码、数据结构、数据文件编排规则和方法。 　　本标准适用于夹具空间角度计算软件设计与编程。其它专业的空间角度计算软件设计与编程亦应参照使用。

Calculation of space angle for computer-aided clamps