[rescue] A Blit lives again

Sandwich Maker adh at an.bradford.ma.us
Tue Mar 12 12:37:49 CDT 2013

" From: Jerry Kemp <sun.mail.list47 at oryx.cc>
" Congratulations Steve!


" I was a 3b2 admin many lifetimes ago and had fond memories.

i was also a 3b2 admin.  cow-orkers in another group had 5620s, which
all the rest of us looked upon with envy...  and then i was assigned
to a new project just after the 630 came out - and as our test setups
were quite complicated i managed to convince my boss we needed them,
running layers, as control terminals.  i also had a 630 acting as
simultaneous console for three 3b2s - it could have 3 serial ports.

when the 730 came out, i discovered our 630s could be upgraded with a
prom change, so one evening i borrowed the roms from the one 730 that
had appeared and spent a little quality time with a burner and eproms
from the stockroom...  our test setup also inadvertently uncovered a
minor bug in the 730 terminal code.

there's a paper describing the setup in the bell labs tech library - if
it still exists - with my name on it.  i got the shock of my life on
my next project when i met someone who'd actually read and been
influenced by it!

does your 5620 have 256k?  i vaguely recall the upgrade from 64k was
pretty simple - just jumper changes and drams or something.

" From: Francois Dion <francois.dion at gmail.com>
" >  http://flic.kr/s/aHsjEiZtnx
" Very cool setup. Red mouse, what's up with that? Did they make red Blits?

nope, all the mice were red, idiosyncracy of the supplier i suppose.
as they were hemispherical and sported black switches for the buttons
they were often nicknamed ladybugs; i saw at least one decorated with
black spots.

the 600/700 series had normal mice, as they'd become common by then
and easier to source.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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