5 May
2008
5 May
'08
6:26 a.m.
On Sunday 04 May 2008 23:54, dwight elvey wrote:
How does that bootstrap work, then, with no ROM?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
From:
ethan.dicks at usap.gov
I am a little unclear, though, about how traditional CP/M systems
were set up for ROM and RAM. Was it common to use a "shadow ROM"
in low mem at reset, then have the BIOS live at the top of memory?
Hi
Most ROM based machines do some kind of shadow method to boot,
unless one has a front panel to select the boot address.
Other than that, there is no particular reason to shadow the high
memory ROM.
My CP/M system is completely RAM. The disk is DMA and has
a built in boot strap boot from disk. No ROM at all in my machine.
Dwight