Answer by Patrick Schlüter for Who set the 640K limit?
Hardware choice of the IBM engineers, when they put the graphic hardware from address A0000 upward. From a software point of view it was possible to overcome the 640KiB limit if there was memory mapped...
View ArticleAnswer by RonJohn for Who set the 640K limit?
Following up on the @StephenKitt answer:CP/M put BIOS and BDOS code at the top of RAM, and IBM decided to copy that idea. Just like with CP/M systems, the plan was to raise the start of reserved memory...
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Answer by Stephen Kitt for Who set the 640K limit?
There was a 640K limit on the original IBM PC, but it was the result of IBM’s design decisions, and nothing to do with Microsoft: it’s the largest contiguous amount of memory which can be provided...
View ArticleWho set the 640K limit?
We all know that "640K should be enough for everyone". But who actually set this limit? The quote is often attributed to Bill Gates, but it doesn't seem like a decision for an Operating System vendor...
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