~ A simplistic Tile Map Demo for the ZX Spectrum Next
    ~ Updated 15th Feb 2023

    ~ tidied and simplified code after working on another project and returned to this
    ~ less unused ports set and less explanation - see ZX Next Wiki for more detailed information
    ~ purpose is to provide code to see the tile map system loading defintions into a tile map 

    Compile:

    ~ Z80 Compiler - SJASMPLUS https://github.com/z00m128/sjasmplus
    ~ sjasmplus --zxnext=cspect [path to to file]
    ~ .nex file has been tested to run on CSPECT emulator: https://dailly.blogspot.com/
    ~ install MONO framework to run on MacOS
    
    ;----------------------------------------------------------------------------
    ; MEMORY MAP
    ;----------------------------------------------------------------------------
    ; $6000 ~ TILE MAP (1280 BYTES SIZE)
    ; $6720 ~ EOF TILE DEFINITIONS (TILE MAP DEFINITIONS + (17 TILES * 32)
    ; $8000 ~ PROGRAM CODE START
    ;----------------------------------------------------------------------------