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[Qemu-devel] [Bug 995758] Re: Possibly inaccurate statement in PC Platfo
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [Bug 995758] Re: Possibly inaccurate statement in PC Platform Docs |
Date: |
Mon, 24 Oct 2016 21:17:58 -0000 |
OK, I just read the text again, and the sentences before the one with
the 0xfffff indeed sounded like the the start address was at the last
byte. I've reworded the text now a little bit so that it should be more
accurate.
** Changed in: qemu
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/995758
Title:
Possibly inaccurate statement in PC Platform Docs
Status in QEMU:
Fix Released
Bug description:
The documentation at:
http://wiki.qemu.org/Documentation/Platforms/PC
Contains the statement that the processor, after reset, executes code
starting from address 0xFFFFF, corresponding to the last byte of the
single megabyte of memory in the old 8086 address range.
From my recollection of working in the microcomputer industry in the
late 1980's, execution actually starts in real mode at the start of
the last 16 bytes of addressable memory, at 0xFFFF0. Think about it -
if it's the last byte there's no room for an address operand to
accompany a 1-byte opcode.
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