[TUHS] PDP-7 Unix Paper
imp at bsdimp.com
Wed Feb 14 15:06:06 AEST 2018
On Tue, Feb 13, 2018 at 4:30 PM, Dave Horsfall <dave at horsfall.org> wrote:
> On Wed, 14 Feb 2018, Warren Toomey wrote:
> All, my journal paper on PDP-7 Unix has just been licensed under CC-BY-SA,
>> so here's a link to the PDF version:
> I'm still astonished at the constraints those guys had to suffer:
> PDP-7 Unix provided a multitasking environment by dividing the 8K
> words of memory into two halves. The lower half of memory was
> reserved for the kernel. The upper half of memory was set aside for
> the currently running process.
> But you try and tell the young people today that... and they won't believe
Today's FreeBSD boot loader is 450k. Of course, it can read half a dozen
different file systems, supports crypto and has a Lua interpreter. Lua is
~140k of that.
FreeBSD's boot2 program is 16k in size, but can barely read a kernel into
memory from a UFS file system and jump to it....
4k words (4608 bytes) for all of unix is impressive...
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the TUHS