Now it is possible to generate code for ZX 81 or ZX Spectrum by commenting/uncommenting a directive.

#define ZXMODEL ZX81
//#define ZXMODEL ZXSPECTRUM

Other models can be implemented as long by creating a pair of files:

• A map of keyboard matrix

  /* Mapa dos bits da matriz de teclado do ZX81
     bit  7   6   5   4   3   2   1   0
          SH  -   c2  c1  c0  l2  l1  l0  
     c0..c2:  column [0..4] 
     l0..l2:  line   [0..7] 
     SH:      flag for SHIFT in composed keys (directionals)
  */
  // Keyboard matrix map
  //       Key      column   line       
  #define _KEY_1	  (0<<3) + 0 
  #define _KEY_2	  (1<<3) + 0 
  #define _KEY_3	  (2<<3) + 0 
  #define _KEY_4	  (3<<3) + 0 
  #define _KEY_5	  (4<<3) + 0 
  #define _KEY_6	  (4<<3) + 3 
  #define _KEY_7	  (3<<3) + 3 
  #define _KEY_8	  (2<<3) + 3 
  #define _KEY_9	  (1<<3) + 3 
  #define _KEY_0	  (0<<3) + 3 
  ...

• A table to associate a PS/2 scancode to a bit (or more) to be activated in the matrix

const PROGMEM unsigned char PS2Keymap_KEY_ABNT[] = { 
_KEY_NONE,         // 0x00   
_SHIFT + _KEY_9,   // 0x01  F9   (GRAPHICS)
_KEY_NONE,         // 0x02  
_KEY_NONE,         // 0x03  F5
_KEY_NONE,         // 0x04  F3
_SHIFT + _KEY_1,   // 0x05  F1   (EDIT)
_KEY_NONE,         // 0x06  F2
_KEY_NONE,         // 0x07  F12           
_KEY_NONE,         // 0x08                
_KEY_NONE,         // 0x09  F10    
...
...