QSIC update - v6 Unix boots and runs

Paul Koning paulkoning at comcast.net
Mon Jan 29 15:30:08 CST 2018

> On Jan 29, 2018, at 4:06 PM, David Bridgham via cctalk <cctalk at classiccmp.org> wrote:
> For those of you who are following along with our QSIC project, today we
> booted v6 Unix successfully for the first time.  We'd first tried this a
> week or two back but discovered that Unix does use partial block reads
> and writes after all and I hadn't implemented those yet. 

FWIW, so does RT11, and in the case of writes, it requires the rest of the block to be zero-filled.  Not everything depends on this, but some parts do; I think Fortran is one.

I remember this because I had to handle it in the driver for the RC11, since it has a 64 byte blocksize.


More information about the cctalk mailing list