Front panel switches - what did they do?

Chuck Guzis cclist at
Tue May 24 23:47:08 CDT 2016

On 05/24/2016 08:48 PM, Jon Elson wrote:

> For sure!  The 360/30 was an 8 BIT machine, 8-bit memory, 8-bit data
> paths, etc.  Really hobbled the performance, and restricted the
> peripherals that could be attached.  The models /22 and /25 had 16-bit
> memory and data paths.

Do you mean the 360/20?  On the topic, were the 20 and 40 the only
members of System 360 to use TROS?

I remember picking up the programming manual for a Model 20 and
realizing that I'd essentially have to re-learn programming.  16 bit
registers, stripped-down instruction set, no I/O channels, "substitute"
instructions for regular 360 fare.

A really strange thing was that the 1130 came out *after* the 360/20.


More information about the cctalk mailing list