Nascom News­let­ter

2. News Of Existing Products

NAS-SYS 3A

We are now using NAS-SYS 3A instead of NAS-SYS 3 in the Nascom 3. The only difference from NAS-SYS 3 is that the OB2 80 is performed automatically to switch in the normal display rather than the AVC in machines fitted with the AVC. If you have NAS-SYS 3, an AVC and the means to blow your own EPROM you can change your existing NAS-SYS 3 to 3A by making the following changes:

Location 04072

3E 80 D3 B2 EF 20 4E 41
53 2D 53 59 53 20 33

CP/M And NAS-DOS

A number of users have asked for information about using both NAS-DOS and CP/M on the same machine. The difficulty arises of course from the need to change the memory map – formally achieved by re-wiring the header plug LKS1. We described in an Application Note (AN-0011) how this can be achieved using a multi (8 !!) way switch. A neater solution is now provided by Business and Leisure, who are selling a small PCB which mounts onte the board in place of LKS1 and the MD PROM. This incorporates a number of relays, and it only needs a two-pole switch to activate this board to switch from NAS-DOS to CP/M. We have used this ourselves, and it is an Approved Product. You can contact B & L on ____ ______.

Manuals

After I wrote the section on manuals in the last newsletter describing the new documentation some (person?) decided to change the volume numbers! The corrected list now reads as follows:

ALL these volumes and the individual manuals within them, are available separately as are the binders. Your usual supplier can give you further information and prices.