main.c: In function 'vectordrawtopoint':
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:98:16: note: in expansion of macro 'VIA_cntl'
  vectrexwrite (VIA_cntl, 0xCC); // Enable #ZERO and try to enable #BLANK
                ^~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:103:17: note: in expansion of macro 'VIA_port_b'
   vectrexwrite (VIA_port_b, 0x84); // Mux to Z, #RAMP disabled
                 ^~~~~~~~~~
main.c:25:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_a           0xD001   //VIA port A data I/O register (handshaking)
                              ^
main.c:104:17: note: in expansion of macro 'VIA_port_a'
   vectrexwrite (VIA_port_a, intensity); //Set Z
                 ^~~~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:105:17: note: in expansion of macro 'VIA_port_b'
   vectrexwrite (VIA_port_b, 0x85); // Store Z
                 ^~~~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:108:58: note: in expansion of macro 'VIA_cntl'
  printf("read: %X from VIA_cntl (0xD00C)\n", vectrexread(VIA_cntl));
                                                          ^~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:110:16: note: in expansion of macro 'VIA_cntl'
  vectrexwrite (VIA_cntl, 0xCE); //#ZERO Disabled, #BLANK Enabled
                ^~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:115:16: note: in expansion of macro 'VIA_port_b'
  vectrexwrite (VIA_port_b, 0x81); //Mux Disabled, #RAMP Disabled
                ^~~~~~~~~~
main.c:25:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_a           0xD001   //VIA port A data I/O register (handshaking)
                              ^
main.c:116:16: note: in expansion of macro 'VIA_port_a'
  vectrexwrite (VIA_port_a, ystrength); //Y Strength
                ^~~~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:117:16: note: in expansion of macro 'VIA_port_b'
  vectrexwrite (VIA_port_b, 0x80); //Store Y
                ^~~~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:118:16: note: in expansion of macro 'VIA_port_b'
  vectrexwrite (VIA_port_b, 0x81);
                ^~~~~~~~~~
main.c:25:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_a           0xD001   //VIA port A data I/O register (handshaking)
                              ^
main.c:119:16: note: in expansion of macro 'VIA_port_a'
  vectrexwrite (VIA_port_a, xstrength); //X Strength (connected directly, doesn't need to be stored)
                ^~~~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:121:58: note: in expansion of macro 'VIA_cntl'
  printf("read: %X from VIA_cntl (0xD00C)\n", vectrexread(VIA_cntl));
                                                          ^~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:127:17: note: in expansion of macro 'VIA_cntl'
   vectrexwrite (VIA_cntl, 0xEE); // Disable #ZERO and try to disable #BLANK
                 ^~~~~~~~
main.c:34:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_shift_reg        0xD00A   //VIA shift register
                              ^
main.c:128:17: note: in expansion of macro 'VIA_shift_reg'
   vectrexwrite (VIA_shift_reg, 0xFF); // #BLANK disabled
                 ^~~~~~~~~~~~~
main.c:29:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_t1_cnt_hi        0xD005   //VIA timer 1 count register hi
                              ^
main.c:130:24: note: in expansion of macro 'VIA_t1_cnt_hi'
          vectrexwrite (VIA_t1_cnt_hi, 0); // start timer - Disables #BLANK -- should be t2?
                        ^~~~~~~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:134:17: note: in expansion of macro 'VIA_cntl'
   vectrexwrite (VIA_cntl, 0xCE); // #ZERO Disabled, #BLANK Enabled
                 ^~~~~~~~
main.c:34:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_shift_reg        0xD00A   //VIA shift register
                              ^
main.c:135:17: note: in expansion of macro 'VIA_shift_reg'
   vectrexwrite (VIA_shift_reg, 0x00); // #BLANK Enabled
                 ^~~~~~~~~~~~~
main.c:29:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_t1_cnt_hi        0xD005   //VIA timer 1 count register hi
                              ^
main.c:137:17: note: in expansion of macro 'VIA_t1_cnt_hi'
   vectrexwrite (VIA_t1_cnt_hi, 0); // Start timer - Enabled #BLANK
                 ^~~~~~~~~~~~~
main.c:14:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_port_b           0xD000   //VIA port B data I/O register
                              ^
main.c:143:16: note: in expansion of macro 'VIA_port_b'
  vectrexwrite (VIA_port_b, 0x81); // Disable #RAMP
                ^~~~~~~~~~
main.c:34:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_shift_reg        0xD00A   //VIA shift register
                              ^
main.c:145:63: note: in expansion of macro 'VIA_shift_reg'
  printf("read: %X from VIA_shift_reg (0xD00A)\n", vectrexread(VIA_shift_reg));
                                                               ^~~~~~~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:149:17: note: in expansion of macro 'VIA_cntl'
   vectrexwrite (VIA_cntl, 0xCC); // Enable #ZERO and enable #BLANK
                 ^~~~~~~~
main.c:34:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_shift_reg        0xD00A   //VIA shift register
                              ^
main.c:150:17: note: in expansion of macro 'VIA_shift_reg'
   vectrexwrite (VIA_shift_reg, 0); // Enable #BLANK
                 ^~~~~~~~~~~~~
main.c:46:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_cntl             0xD00C   //VIA control register
                              ^
main.c:158:18: note: in expansion of macro 'VIA_cntl'
    vectrexwrite (VIA_cntl, 0xCE); // Enable #ZERO and enable #BLANK
                  ^~~~~~~~
main.c:34:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_shift_reg        0xD00A   //VIA shift register
                              ^
main.c:159:18: note: in expansion of macro 'VIA_shift_reg'
    vectrexwrite (VIA_shift_reg, 0); // Enable #BLANK
                  ^~~~~~~~~~~~~
main.c: In function 'main':
main.c:26:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_DDR_b            0xD002   //VIA port B data direction register (0=input 1=output)
                              ^
main.c:183:16: note: in expansion of macro 'VIA_DDR_b'
  vectrexwrite (VIA_DDR_b, 0x9F); // All Outputs except COMPARE input and PB6 at Cartridge Port
                ^~~~~~~~~
main.c:27:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_DDR_a            0xD003   //VIA port A data direction register (0=input 1=output)
                              ^
main.c:185:16: note: in expansion of macro 'VIA_DDR_a'
  vectrexwrite (VIA_DDR_a, 0xFF); // All Outputs
                ^~~~~~~~~
main.c:26:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_DDR_b            0xD002   //VIA port B data direction register (0=input 1=output)
                              ^
main.c:187:60: note: in expansion of macro 'VIA_DDR_b'
  printf ("read: %X from VIA_DDR_b (0xD002)\n", vectrexread(VIA_DDR_b));
                                                            ^~~~~~~~~
main.c:27:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_DDR_a            0xD003   //VIA port A data direction register (0=input 1=output)
                              ^
main.c:188:60: note: in expansion of macro 'VIA_DDR_a'
  printf ("read: %X from VIA_DDR_a (0xD003)\n", vectrexread(VIA_DDR_a));
                                                            ^~~~~~~~~
main.c:35:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_aux_cntl         0xD00B   //VIA auxiliary control register
                              ^
main.c:193:16: note: in expansion of macro 'VIA_aux_cntl'
  vectrexwrite (VIA_aux_cntl, 0x98); //Shouldn't shift registers be free-running?
                ^~~~~~~~~~~~
main.c:35:30: warning: large integer implicitly truncated to unsigned type [-Woverflow]
 #define VIA_aux_cntl         0xD00B   //VIA auxiliary control register
                              ^
main.c:195:62: note: in expansion of macro 'VIA_aux_cntl'
  printf("read: %X from VIA_aux_cntl (0xD00B)\n", vectrexread(VIA_aux_cntl));
                                                              ^~~~~~~~~~~~