Technology: Intel opts for simpler, speedier chips

 作者:麻稚履     |      日期:2019-02-28 01:08:03
By JEFF HECHT in BOSTON Personal computers look likely to be dominated more and more by the technology already adopted by Apple and IBM – reduced instruction set computing, or RISC. Intel, the world’s largest maker of microprocessor chips, and Hewlett-Packard, the second-largest American computer company, have announced that they are joining forces to develop a new generation of computer chips that will exploit some form of RISC technology. They will probably be available in 1998. Older chips, such as the Intel 8088 that powered the original IBM PC, have a large repertoire of complex instructions that they can carry out. But designers found that they could increase overall processing speed by using fewer, simpler instructions and performing them in sequence at high speed to give the effect of a single complex instruction. This year IBM, Apple and Motorola introduced the PowerPC chip family, which uses RISC technology. Intel’s latest microprocessor, the Pentium, uses some RISC technology, but retains other complex instructions so as to be compatible with older Intel processors. Intel and Hewlett-Packard are investigating RISC and two other related designs, called Wide Word and Very Long Instruction Word (VLIW), which advocates believe can increase speed above RISC designs by packing more information into each instruction. The new Intel chips will also use 64-bit addressing, meaning they can directly access up to 16 000 gigabytes of memory. The first generation of IBM PCs could directly address up to 64 kilobytes, while the 32-bit chips now in use – including the Motorola 60380, the Intel 80486 and the PowerPC family – can immediately access a 4-megabyte address space. Intel has nearly finished designing its next family of chips, codenamed the P6. This is an extension of the Pentium, and will be introduced next year. The Hewlett-Packard deal is expected to affect work just starting on its successor, called the P7 series,