22 Apr
2006
22 Apr
'06
3:02 p.m.
I have both boxes attached to systems, I can try to test this.
I've looked at the HP1351 manual on hpmuseum.net, alas I didn't have my
1350 manual with me at the time...
The mechanical layont is identical, but as far as I can see the only PCB
that's the same is the backplane. But the general blocks of electronics
are much the same in the 2 devices. The RAMs, are of course differnt (the
1351 seems to use normal 4116-like 16K bit DRAMs, the 1350 uses those
TMS4096-like 22pin 4K bit DRAMs).
I have a few test patterns that were written for the
1350 that do not
display correctly on the 1351 however (odd!). So am I sure that
there is a real difference in how they react when you plot past
the limits, whatever they are.
It's quite likely there's extra logic in the 1351 to prevent plotting to
a corodinate that would be interpretted as a text character.
-tony