16 Dec
2019
16 Dec
'19
2:45 a.m.
I’m looking for source code of the original Blit as described here:
http://doc.cat-v.org/bell_labs/blit/blit.pdf
<http://doc.cat-v.org/bell_labs/blit/blit.pdf>
It does not seem to be on the v8 tape. I found the following on the web:
http://www.brouhaha.com/~eric/retrocomputing/att/5620/software/
<http://www.brouhaha.com/~eric/retrocomputing/att/5620/software/>
but that seems to be from much later and for the 5620.
Then there is this, which seems to be the Blit's graphics routines or a derivtive
thereof:
https://stuff.mit.edu/afs/athena/astaff/project/Sdev/S/src/fun/blit/
<https://stuff.mit.edu/afs/athena/astaff/project/Sdev/S/src/fun/blit/>
(although it seems larger than the 8KB mentioned in the paper).
I’m aware of this emulator:
https://github.com/aap/blit <https://github.com/aap/blit>
which uses a rom dump; it appears a good base for h/w documentation.
Did the sources of these rom contents survive?