4 Oct
2007
4 Oct
'07
12:36 a.m.
On 3 Oct 2007 at 15:26, Allison wrote:
There was a late version of 9900 that was done in I
think bipolar or
some strange combo process that was many times faster than the
earlier machine be they NMOS or TTL.
I2L = TI Integrated Injection Logic. circa 1979-1980. SBP9900
initially, followed by the SBP9989. I never could wrangle a sample
from the TI sales guy. The stuff tended to go into
military
applications.
IIRC, it was faster than the MOS version, but not tremendously so.
Clock max was something like 3 or 4 MHz. I/O was TTL-compatible.
Cheers,
Chuck