I gather from elsewhere that your target is a Z80? If so, you need at least
an '-mz80' on the command line, thus you would use...
sdcc -mz80 putchar.c
On your code - I would comment that you're using a '=' on your if comparison,
you probably mean '=='. I would simplify the pointer declarations too with a
typedef, then things might be clearer for the compiler. If you're declaring
an absolute address in memory, then you should use something like this array
declaration I used on a recent project...
typedef unsigned char byte_t;
volatile byte_t __at 0xD000 VideoRAM[25*40];
The 'volatile' keyword may or may not be appropriate in your application, but
the '__at' allows you to declare an absolute address. The byte_t type I
declare is useful because 8-bit signed integers (chars) aren't all that
useful much of the time. If you need a signed integer, you will probably want
short or int.
On Tuesday 05 May 2009 02:35:11 Kevin Zee wrote:
> I have gotten the libraries to build an am trying (unsuccessfully) to
> make a custom putchar.c (I removed the putchar.s file). This is what I
> have so far:
>
> #include "memory.h"
> void putchar(char ch) {
> *(unsigned char *)pScreen = video;
> *(unsigned char *)pX = caratx;
> *(unsigned char *)pY = caraty;
>
> char x;
> char y;
>
> x = pX;
> y = pY;
>
> pScreen += y * 160;
> pScreen += x * 2;
>
> if (ch = 0x0d) {
> // Adjust the cursor position, checking to see if we need to
> scrool the screen
>
> return;
> }
>
> return;
> }
>
>
> It gets errors on just about every line. The first error says syntax
> error: token 'char' where I declare x. Then, everywhere that a variable
> is mentioned, it says undefined identifier - even when I declare a variable
>
> the .h file is.
> #ifndef MEMORY_H
> #define MEMORY_H
>
> #define caratx 0x1FFE
> #define caraty 0x1FFF
> #define video 0x2000
>
> #endif
>
> I simply use "sdcc putchar.c" without quotes to compile.
>
> I have been trying for hours to get this thing to work. What am I doing
> wrong?
>
<snip>
--
Richard.
PGP Key-id: 0x5AB3D350
Money is better than poverty, if only for financial reasons.
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