sdcc-extra/historygraphs/hello-z80/hello.c

   1 // Source by Philipp Krause under CC0 1.0
   2
   3 // A "Hello, World!"-Program. We use it to make the board
   4 // output something that can not be mistaken for output
   5 // From a benchmark.
   6
   7 // "Hello, world!" @ 115200 baud.
   8
   9 #include <stdint.h>
  10 #include <stdio.h>
  11
  12 __sfr __at 0x00 Exec_port;
  13 __sfr __at 0x01 StorOpc_port;
  14
  15 #if defined(__SDCC) && __SDCC_REVISION < 9624 // Old SDCC weirdness
  16 void putchar (char c)
  17 {
  18 __asm
  19         di
  20 __endasm;
  21         StorOpc_port = 0x1;
  22         Exec_port = c;
  23 __asm
  24         ei
  25 __endasm;
  26 }
  27 #else // Standard C
  28 int putchar (int c)
  29 {
  30 __asm
  31         di
  32 __endasm;
  33         StorOpc_port = 0x1;
  34         Exec_port = c;
  35 __asm
  36         ei
  37 __endasm;
  38         return(c);
  39 }
  40 #endif
  41
  42 void main(void)
  43 {
  44         for (;;) {
  45                 printf("Hello, World!\n");
  46         }
  47 }
  48