IBM 5110 APL ROS

From: Hans B PUFAL <hansp_at_citem.org>
Date: Wed Jul 7 14:42:17 2004

Christian Corti wrote:

> But if you are just curious I can send you ROS images of the language ROS.
> Making an image from the Executable ROS is not trivial because the
> processor can't access this ROS during instruction execution phase,
> only during instructions fetches. This is the reason why loading word
> constants into registers in ROS code can only be done with LBI,MLH,LBI and
> not LWI (i.e. PC relative with postincrement).
> For example, to load the constant $A62F into R2 you have to write
> LBI R2, #$A6
> MLH R2, R2
> LBI R2, #$2F
>
> instead of
>
> LWI R2, #$A62F
> which means
> MOVE R2, (R0)+
> DW $A62F <- this is a data word that can't be read from ROS

I'm curious ;-) Is this technical information available on-line anywhere?

It would be fun to do a 5110 simulator.....

   -- HansP
Received on Wed Jul 07 2004 - 14:42:17 BST