chmem: remove dead comment

diff --git a/Applications/util/chmem.c b/Applications/util/chmem.c
new file mode 100644 (file)
index 0000000..915a96b
--- /dev/null
+++ b/Applications/util/chmem.c
@@ -0,0 +1,77 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+int main(int argc, char *argv[])
+{
+  int v;
+  FILE *fp;
+  unsigned char buf[10];
+  unsigned short top;
+  uint8_t be;
+
+  if (argc != 2 && argc != 3) {
+    fprintf(stderr, "%s [executable] {size}\n", argv[0]);
+    exit(1);
+  }
+  if (argc == 2)
+    fp = fopen(argv[1], "r");
+  else
+    fp = fopen(argv[1], "r+");
+  if (fp == NULL) {
+    perror(argv[1]);
+    exit(1);
+  }
+  if (fread(buf, 10, 1, fp) != 1) {
+    fprintf(stderr, "%s: too short ?\n", argv[0]);
+    exit(1);
+  }
+  if (buf[3] != 'F' || buf[4] != 'Z'|| buf[5] != 'X' ||
+    buf[6] != '1') {
+    fprintf(stderr, "%s: not a Fuzix binary format.\n", argv[1]);
+    exit(1);
+  }
+  if (buf[3] == 0x7E || buf[3] == 0x20)
+    be = 1;    /* 6809 */
+  else if (buf[3] == 0x4C || buf[3] == 0x38)
+    be = 0;    /* 6502 */
+  else if (buf[3] == 0xC3 || buf[3] == 0x18)
+    be = 0;    /* Z80 */
+  else {
+    fprintf(stderr, "%s: unknown Fuzix binary type.\n", argv[1]);
+    exit(1);
+  }
+  if (argc == 2) {
+    if (be)
+      top = buf[9] | (buf[8] << 8);
+    else
+      top = buf[8] | (buf[9] << 8);
+    if (top)
+      printf("Fuzix binary set at %d bytes.\n", top);
+    else
+      printf("Fuzix binary, set to allocate all available.\n");
+    exit(0);
+  }
+      
+  if (sscanf(argv[2], "%d", &v) != 1 || v < 0 || v > 65536) {
+    fprintf(stderr, "%s: invalid chmem value '%s'.\n", argv[0], argv[2]);
+    exit(1);
+  }
+  if (be) {
+    buf[8] = v >> 8;
+    buf[9] = v & 0xFF;
+  } else {
+    buf[8] = v & 0xFF;
+    buf[9] = v >> 8;
+  }
+  rewind(fp);
+  if(fwrite(buf, 10, 1, fp) != 1) {
+    fprintf(stderr, "%s: write error.\n", argv[0]);
+    exit(1);
+  }
+  fclose(fp);
+  exit(0);
+}