80286: 16 MB Of Memory, But Still 16 Bits
07:20 - Monday 4 August 2008 by Bestofmedia Team
Source: Tom's Hardware – Keywords: intel, cpu, history
Source: Tom's Hardware – Keywords: intel, cpu, history
Table of content:
80286: 16 MB Of Memory, But Still 16 Bits
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Released in 1982, the 80286 was 3.6 times faster than the 8086 at the same frequency. It could manage up to 16 MB of memory, but the 286 was still a 16-bit processor. It was the first x86 equipped with a memory management unit (MMU), allowing it to manage virtual memory. Like the 8086, it did not have a floating-point unit (FPU), but could use a x87 co-processor chip (80287). Intel offered these processors at a maximum frequency of 12.5 MHz, whereas their competitors reached 25 MHz.
| Code name | N/A |
| Date released | 1982 |
| Architecture | 16 bits |
| Data bus | 16 bits |
| Address bus | 24 bits |
| Maximum memory | 16 MB |
| L1 cache | No |
| L2 cache | No |
| Clock frequency | 6–12 MHz |
| FSB | same as clock frequency |
| FPU | 80287 |
| SIMD | No |
| Fabrication process | 1,500 nm |
| Number of transistors | 134,000 |
| Power consumption | N/A |
| Voltage | 5 V |
| Die surface area | 49 mm² |
| Connector | 68-pin |
- Previous page 8086: The First PC processor
- Next page 386: 32-Bit and Cache Memory
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Wasn’t one of the key features of the Pentium Pro line of processors the increase in IRQs to 256 rather than the 16 of the previous generations?
In the days of virtual IRQs assigned by windows it's easy to forget the headache of trying to install multiple interface cards without running out of resources.
am I mistaken? or the Maximum memory figures are wrong? 4096MB or is it KB on 386, 486 and Pentium MMX class CPU's. and 64MB on P-II and so on.
Modern Intel CPU: P1-> P3 -> P4M -> C2D -> C2Q
Modern AMD CPU: P1(Intel) -> P3(Intel) -> K8 -> K10
Next gen CPU: Modified P1
The Pentium 1 & 3 are possibly the most widely base processor in modern computing. Even AMD's chips are based on them.
Hmm....
Interesting...AMD chips based on P3... EHEHEHEHHEHEHE
I think you need a...khhmmm...LIFE
cheers
Nice article that made me a little bit misty-eyed and nostalgic (being of the original 8086 generation)
Did a bit of a clear-out of my parts boxes not so long ago and found a couple of PPro's, a 486DX2/66, a 386SX and a 386DX. Threw them out but perhaps should have built a little shrine? ;p
Cheers.
There are some errors in the article, Pentium M Dothan had a 2.26GHz model which is not mentioned there, they had a VCore of 1.356V and a TDP of 27W, not 36W like stated here, also it's die size is 88mm2, not 87mm2, it also came as a socket 478 which was incompatible with the Pentium 4 socket 478 due to it's electrical differences.