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The following was contributed by Constantin Olbrich quite a while ago.Thanks Constantin!

(I did the conversion to HTML - please don't blame him!)

The NAS-SYS Toolkit comes in two 2708 and is adressed at B000..B7FF. It is designed for NAS-SYS 1, Naspen and the 8K Microsoft Basic. I found the original Toolkit and Naspen EPROMS in my EPROM box, and now, these EPROMS are still working and heating on the RAM A Board.

The suggested memory map was:
B000-B7FF NAS-SYS Toolkit 2*2708
B800-BFFF Naspen 2*2708
C000-C3FF NAS-SYS Debug 3.1 1*2708
C400-CFFF NAS-DIS Disassembler 3*2708
D000-DFFF ZEAP 2.1 (with the ":" command) 4*2708
- - --------
- - 12 Eproms: 8 on N2, 4 on RAM A
- - -
E000-FFFF NASCOM ROM Basic 8K ROM

The Toolkit has the following functions:
Keyboard: Automatic keyboard repeat feature
(incompatible with NAS-SYS 3)
Printer: A Printer Routine with handshake
don't know, if it was a parallel or serial printer.
Serial handshake is possible with a small hardware modification.
Main Menue: (displayed at startup EB000 )
BC Basic Cold
B Basic Warm
N NAS-SYS
P Naspen
Kx Keyboard Options
Px Printer Options
Basic Interpreter: Some new keywords (incompatible with NAS-SYS 3)
The new keywords are active, when BASIC is started from the Toolkit.
  • RENUMBER renumber the program lines of loaded basic program
  • STEP single step
  • FIND find a string in loaded basic program
  • HELP find source line/statement after a runtime error
  • HEX convert hex to decimal (max 10 arguments) usefull for generating DATA statements
  • INKEY & RINK Keyboard wait and scan These routines were called via USR()
  • MON back to NAS-SYS
  • APPEND Append a basic program to an existing program
  • AUTO Auto line number for easy typing
  • DELETE Delete programe lines from xx in range zz
  • DUMP Dump numeric and string Variables, but no arrays

As the ZEAP 2.x Package, the NAS-SYS Tookit checks, if it is run out of an EPROM or out of RAM, which was a "copyright violence".
To run the NAS-SYS Toolkit in RAM change:

There are also some patches for the Toolkit to work with NAS-SYS 3. But these patches are, not as the others, not 100% ok, e.g. RENUMBER don't work.


If you feel like typing this lot in, then Constantin also provided a hex dump of the EPROMs. I have made this available as a text file.