After much frustration and headaches I got CC65 (C compiler for 6502
systems, including apple II) up and running.

I set up a batch file with the commands to compile, assemble, link,
and then store the object code on a DSK image.  It is a nice way to
write Apple II code!  Maybe this CC65 will work on PCtransporter?

Is there a way to access HGR, HPLOT,HCOLOR from within a C program?  I
am also curious about XDRAW, LOAD, SAVE, OPEN, READ, WRITE.  Is there
a document somewhere in which I can read about this stuff?  I see
references to Apple I/O in Apple2.o file in CC65 /include directory.

Rich
aiiadict AT hotmail DOT com
http://rich12345.tripod.com



On 3 Sep 2003 19:55:20 -0700, aiiadict@hotmail.com (Rich J.) wrote:

>After much frustration and headaches I got CC65 (C compiler for 6502
>systems, including apple II) up and running.
>
>I set up a batch file with the commands to compile, assemble, link,
>and then store the object code on a DSK image.  It is a nice way to
>write Apple II code!  Maybe this CC65 will work on PCtransporter?
>
>Is there a way to access HGR, HPLOT,HCOLOR from within a C program?  I
>am also curious about XDRAW, LOAD, SAVE, OPEN, READ, WRITE.  Is there
>a document somewhere in which I can read about this stuff?  I see
>references to Apple I/O in Apple2.o file in CC65 /include directory.
>
>Rich
>aiiadict AT hotmail DOT com
>http://rich12345.tripod.com

Hiya,

Yes, you can access those functions.  If you are writing under DOS
3.3, I am not sure exactly (yet) how to access (easily)  the LOAD,
SAVE, OPEN, READ, WRITE functions.  Under ProDOS, use the MLI
interface.  I plan on writing a library for ProDOS file I/O using the
MLI calls.

As for the other functions, what you really should do is find a good
source for technical information on the Apple //e.  For example, the
Apple //e Technical Reference Manual.  Though not easy to find, a lot
of the information in the Apple //c (Yes, "C" not "E") 2nd Edition is
still very applicable, and you can get a copy from www.A2Central.com

Knowing the Monitor entry points for various functions is pretty
important.  Actually, I'm looking at my //c Tech Ref Manual, 2nd
Edition, and I don't see any of the firmware entry points for Hi-Res
graphics.  Seems to only list the Lo-Res routines. Hmm.. Well, the
following examples I figured out from looking in the book "Apple
Graphics & Arcade Game Design" by Jeffrey Stanton.

Hope this helps!  Eventually, I'd like to write a nice little library
for CC65 with all these functions ready to go.

// CHRIS



EXAMPLES:

HGR is at $F3E2

In CC65, you can call this with this code:

    __asm__ ("JSR $F3E2"); /* HGR : Set Graphics Mode */


HCOLOR is at $F6F0

To call this, you load the X register with the color you want.
In CC65, you can call this with this code:

    __asm__ ("LDX #3"); /* COLOR=WHITE */
    __asm__ ("JSR $F6F0"); /* HCOLOR */

HPLOT is at $F457

	Register Y = HORIZONTAL Position (HI BYTE)
	Register X = HORIZONTAL Position (LO BYTE)
	Register A = VERTICAL Position

HLINE is at $F53A

	Register X = HORIZONTAL Position (HI BYTE)
	Register A = HORIZONTAL Position (LO BYTE)
	Register Y = VERTICAL Position

HOME is at $FC58

In CC65, you can call this with this code:

    __asm__ ("JSR $FC58"); /* HOME: Clear Text Window, Cursor Top */

TEXT is at $FB39

In CC65, you can call this with this code:

    __asm__ ("JSR $FB39"); /* Init Text Screen (Don't Force Page 1) */