Questions tagged [80486]

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Where to find a Toshiba t1910,1950,1960 laptop fdd drive cable, non standard 26 pin ffc

I was trying to take apart a Toshiba T1950ct laptop to replace slim floppy drive:s belt. Unfortunately, I broke the delicate flat flex cable, which is non standard 26 pin floppy cable. Motherboard has ...
45
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2answers
10k views

Why does the 80486 take longer to execute simple instructions than complex ones?

The 80486 processor can execute many instructions in a single cycle, such as a register-to-register add instruction (ADD EAX, EBX, for example), which one would generally assume is fairly complex, ...
20
votes
2answers
6k views

Why did Socket 3 have more pins than needed for the 486?

Intel's Socket 3, used for 486 processors, was a 19×19 pin grid array socket. However, all compatible processors, to my knowledge, used 17×17 PGA packages. What was the point of the extra pins around ...
4
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3answers
294 views

Bad floppy drive in T1910CS 486 laptop

I've recently picked up a Toshiba T1910CS 486 laptop. It's in OK shape, with a 500MB hard drive and DOS installed. I also ordered a USB floppy disk drive and some floppy disks so that I could install ...
15
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1answer
852 views

Were there 486SX revisions without an FPU on the die?

I know that the 486SX had its FPU disabled, maybe by binning 486 CPUs into those with and without functioning FPUs. But did Intel eventually make a 486SX revision without an FPU on the die?