RE: [midatlanticretro] Re: OT: Too quiet
- Joshbensadon wrote:
> --- In firstname.lastname@example.org, "B. Degnan" <billdeg@...>CUTTER is the Processor Technology ROM monitor. It supports/requires the
> > I have been repairing Commodore 64's for the PC shop, and wrapping up
> > Visual 1050 project. I have been trying to get CUTTER working again
> on my
> > IMSAI. THis weekend I am going to resume the PDP 11/40 project, and
> > the 11/05 workspace ready.
> > bd
> What is "CUTTER"?
PT VDM display card and the 3P+S parallel/serial card (an ASCII keyboard is
required to be attached to the primary parallel port). It also supports
cassette tape storage via the CUTS cassette I/O card but does not require
The whole thing together results in a "Subsystem B". Essentially a Sol in
an S-100 chassis. The manual is here:
>Yes, In my opinion you are correct.
> Here's a transistor with 430 on it. Would that make it 1964, week 30?
> Transistor part number is 2N1218. Or does the 430 refer to the factory the
> transistor was made? or other?
> Photo of transistor posted in the photos/Josh Bensadon folder of this group.
> I've seen some IC's with only a 3 digit code on them (not part of this analog
> computer). Case in point is the following:
> RCA H 650
> Is that to mean 1976 week 50?
> H being the factory where it was made?
In the early years of semiconductors most parts have three digit date codes.
You have to know the approximate decade the part was first produced to get the
Sometimes you have trouble telling the part number apart from the date code.
In the 1970s a lot of the 7400 series ic's had date codes like 7414 and a part
number like 7404.
I was always having trouble with those.
A good history of early transitor marking can be found here.