8088 vs. 80c88

[Allison]

>
>Subject: Re: 8088 vs. 80c88
>   From: Chris M <chrism3667 at yahoo.com>
>   Date: Fri, 13 Feb 2009 08:10:34 -0800 (PST)
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>regardless, and be sure I am no expert on semiconductor manufacturing, I'd be surprised to find out that all 8088's were CMOS after a certain date. The 80c88's were used mostly in small laptops, no? 

No they wer eused in many stationary apps wherelow power was desired.

(small being anything smaller then that Zenith big honker, w/the shocking blue display. It used a *real* 8088 IINM). A CMOS version would be slower and more prone to damage from static electricity. And it would require less power. Off the top of my head I can't think of any desktops that used them, but I may have actually ran into 1 or 2 in my travels.

They were not slower, most were as fast or faster.  I have a few here. 10mhz and 12mhz
parts along with 80C188s (12 and 16mhz).


Allison


> But I am glad you managed to answer your own question Jimbo :)
>
>--- On Thu, 2/12/09, Jim Leonard <trixter at oldskool.org> wrote:
>
>From: Jim Leonard <trixter at oldskool.org>
>Subject: Re: 8088 vs. 80c88
>To: General at mail.mobygames.com, "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>Date: Thursday, February 12, 2009, 2:49 PM
>
>Jim Leonard wrote:
>> So a simple routine to try to identify the 8088 vs. the 80c88 would look something like:
>> 
>>   mov     cx,2            ; test if following instruction will be
>>                           ; repeated twice.
>>   db      0F3h,26h,0ACh   ; rep es: lodsb
>>   jcxz    Yes             ; intel non-CMOS chips do not care of rep
>>   jmp     Nope            ; before segment prefix override, NEC and
>>                           ; CMOS-tech ones does.
>
>It turns out my information is bad.  The bug only asserts itself when an interrupt occurs during the REP.  Buggy CPUs don't continue; later ones do.  So to fix my detection code, I will increase the count in cx to something much longer, probably f000.
>-- Jim Leonard (trixter at oldskool.org)            http://www.oldskool.org/
>Help our electronic games project:           http://www.mobygames.com/
>Or check out some trippy MindCandy at     http://www.mindcandydvd.com/
>A child borne of the home computer wars: http://trixter.wordpress.com/
>=0A=0A=0A