Added VGA font rom conversion program.

tools/vgaromgen/README.md

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+# VGAROMGEN 1.0<br><h2>Binary to hex format converter for the Apple One Project<br>Niels A. Moseley
+
+The utility converts the ASCII/binary VGA font rom format into a hex format. It was programmed for the TinyCC portable compiler: http://download.savannah.gnu.org/releases/tinycc/
+
+Install TCC in the subdir tcc.

tools/vgaromgen/main.c

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+/* Converts vga_font.bin into vga_font.hex 
+   
+   Author: Niels A. Moseley
+   
+*/
+
+#include<stdio.h>
+#include<stdint.h>
+
+const char hextbl[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+
+int main(int argc, char *argv[])
+{
+    printf("VGAROMGEN v1.0\n");
+    
+    FILE *fin = fopen("../../roms/vga_font.bin","rt");
+    if (fin == NULL)
+    {
+        printf("Error: cannot open vga_font.bin!\n");        
+        return 1;
+    }
+    
+    FILE *fout = fopen("../../roms/vga_font.hex","wt");
+    if (fout == NULL)
+    {
+        printf("Error: cannot open vga_font.hex for writing!\n");        
+        fclose(fin);
+        return 1;        
+    }
+    
+    uint8_t count = 0;
+    uint8_t nibble = 0;
+    uint32_t bitcount = 0;
+    while(!feof(fin))
+    {
+        char c = fgetc(fin);
+        if ((c == '0') || (c == '1'))
+        {
+            nibble <<= 1;
+            nibble = nibble | (c - '0');
+            count++;
+            if (count == 4)
+            {
+                fprintf(fout, "%c", hextbl[nibble]);
+                count = 0;
+                nibble = 0;
+                if ((bitcount % 8) == 7)
+                {
+                    fprintf(fout, "\n");
+                }
+            }
+            bitcount++;
+        }
+    }
+    
+    printf("Done: converted %d bits\n", bitcount);
+    
+    fclose(fout);
+    fclose(fin);
+    return 0;
+}

tools/vgaromgen/run.bat

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+tcc\tcc -run main.c