11 Feb
2015
11 Feb
'15
9:01 p.m.
Those would have been the IBM 2260 terminals, but they were beyond
dumb - they were retarded. Each 2260 was more or less just a video
monitor and a keyboard encoder. The brains were all in the 2848
control unit, which had mercury delay lines to service a number of
2260s (maybe up to 16 I think?).
The bad news is that if you ever find a 2260, it will just be another
chrome doughnut in your collection, being useless without a 2848,
which likely just do not exist anymore.
--
Will
On Wed, Feb 11, 2015 at 11:50 PM, Chuck Guzis <cclist at sydex.com> wrote:
On 02/11/2015 05:47 PM, Jon Elson wrote:
On 02/11/2015 01:22 PM, Chuck Guzis wrote:
Hmm, not familiar with that terminal. Was it like the IBM terminals (2250
IIRC?) that used delay lines for video memory (i.e. the delay line didn't
drive a ROM character generator, but rather held the generated characters)?
--Chuck
That was the Super Bee, right? 8008 CPU, but I thought the memory was
MOS shift-register, not bucket-brigade (which I mostly associate with
analog applications, such as reverb effects).
No, this predated the super bee. No CPU at all, just about 75 TTL ICs,
the clock
drivers and the bucket brigade chips. And, yes, some versions of them
were
capable of analog signals, and used to make reverbs.