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Questions tagged [386]

For questions about Intel's 386 processor, alternatively known as the i386 or 80386.

11
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2answers
745 views

Examples of operating systems using hardware task switching of x86 CPUs

Intel IA-32 architecture a.k.a. x86 offers hardware task switching capabilities since 80386. It includes TR (task register), memory segmentation features such as Task State Segment, task gates, call ...
24
votes
3answers
5k views

386SX, NES and how much did data lines really cost anyway?

In 1988, Intel introduced the 80386SX, most often referred to as the 386SX, a cut-down version of the 80386 with a 16-bit data bus mainly intended for lower-cost PCs aimed at the home, educational, ...
2
votes
2answers
315 views

USB ports for a 486 laptop (pccard 16bits)

I have an old laptop 486 with PhoenixBIOS which supports PC card 16bits( PCMCIA II/III). I am thinking about the possibility of adding a pccard 16bits with USB ports, mainly to read usbsticks or ...
3
votes
1answer
187 views

Operating systems (on support or recent) to install on a i486 processor computer [duplicate]

What operating systems would you recommend for this type of hardware? Though I keep the question text generic because answers can work for many others, but my specific case is a Laptop Siemens ...
1
vote
1answer
272 views

What make and model is this 386 mainboard?

I have received a 386 mainboard with OPTI chipset. Possibly an early model, since it does not support cache. The chipset is labeled "82C381P" and "Chipset2".
16
votes
2answers
2k views

The start of x86: Intel 8080 vs Intel 8086?

Why is it said that all modern Intel processors of the x86 family are said to descent from the Intel 8086 and not the Intel 8080? From the Wikipedia article on the Intel 8086, The 8086 gave rise to ...
5
votes
1answer
328 views

What was the fastest third party FPU?

For both the x86 and SPARC based machines, it was possible to get not only FPUs installed as a separate, discrete IC, but also third party FPUs. In particular, I've read about Weitek on Wikipedia. ...
7
votes
4answers
591 views

When did the tower form factor appear and when did it become popular?

Essentially, my question is there in the title. Tower cases are commonplace these days, and probably are the "default" form factor for personal computers (or at least were, before they were surpassed ...
3
votes
2answers
185 views

IBM PS/2 Model 53 Not Powering On

I bought a PS/2 with the intent of robbing it's case for a restomod project, but since that is on the backburner right now I decided to see if it would work. When I flip the power switch, the PSU ...
6
votes
1answer
301 views

What exactly were those 808X computers that would switch to 80386 upon Ctrl-Alt-Del?

A while ago I've been told that some generic-brand PC, (yet packed on an IBM5150 case) had the ability to become a 80386 upon pressing Ctrl-Alt-Del (warm reboot) ? I guess there might have been (for ...
8
votes
2answers
186 views

Pair Am386 with i387

I've got a motherboard with a Am386/DX processor. I've also got an Intel 387 coprocessor. Is it possible to use the Intel 387 that I've got together with the Am386 or do I need a coprocessor from AMD?...