硬件收藏论坛

    注册 |登录

    硬件收藏论坛硬件收藏论坛CPU › 查看主题

    8884

    查看

    2

    回复
    返回列表

    Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8

    楼主
    发表于 2005-10-8 08:09 | 显示全部帖子
    以下是引用中国聚U在2005-10-7 15:00:26的发言:

    After introduction of the 386 into the market the first CPUs had been provided with a bug in the 32 bit MUL instruction ("MUL bug") which prevented running the chip in protected mode. Those chips were marked "only s/w 16 bits" or with a single sigma and were only sold to OEP. The tested and passed chips carry a double sigma on the package. Nevertheless the 16-bit 80386 was much faster than previous chips and none of the applications required protected mode so Intel didn't feel obliged to pronounce the bug. Unlike the first Pentium 60 with its fdiv bug Intel did not offer an exchange for enhanced versions.

    可以肯定的是,凡有“Only S/W 16 Bits”或单sigma 标记的386,都是错版的386。我认为更早期的比如16Mhz的出Bug的可能性更大,但我也不敢完全确楼主这个就是没有Bug的,反正没有标记Sigma以及IV标记的确也不多见。好好藏着吧

    [em07]

    与我的理解有点出入:

    表有IV标志的是INTER发现386BUG后生产出来的386,没有BUG;EE最初是为了区别经过检测没有BUG的386,而打上的;而检测出来有BUG的386则弄了个Only S/W 16 Bits出来。同时存在没有来得及检测的386,是什么都没有的,INTER曾告知用户:没有经过检测。也存在既有IV又有EE的386,这个的原因就不知道了。

    可以肯定的是:只要有IV和EE就没有BUG。

    愚见。指教。

    [em04]

    TOP

    Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8

    沙发
    发表于 2005-10-8 10:13 | 显示全部帖子
    以下是引用bccwchan在2005-10-8 10:03:05的发言:

    想问一下楼主的意思是它是错体版, 还是计算错误版? 因为SPEC CODE SX218应是一只 386DX 25Mhz, 但楼主的却是33Mhz, 所以我以为楼主是指它是一个错体版, 是不是这个意思呢?

    难道是打磨的?反正那个年代已经有打磨的了......

    至于错体版,总觉得不大可能,理应没有这种类型的错体......

    [此贴子已经被作者于2005-10-8 11:39:10编辑过]

    TOP

    Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8Rank: 8

    板凳
    发表于 2005-10-11 14:00 | 显示全部帖子

    佩服的五体投地! 学习!学习!

    TOP

    硬件风云 |联系我们

    GMT+8, 2024-5-1 20:06, Processed in 0.044746 second(s), 10 queries.

    Powered by Discuz! X1

    © 2001-2010 Comsenz Inc.