Re: make your own carts for c64?
                                       
   From: John Iannetta <73510.2152@CompuServe.COM>
   Reply to: John Iannetta
   Date: Thu, 29 Oct 1998 00:09:36 -0500
   Organization: CompuServe, Inc. (1-800-689-0736)
   References:
          <712g0f$k0d$4@ultra.sonic.net>
    David St. Hubbins said,

"is it possible to make your own cartriges with single file programs".

    If the file isn't too large, yes.  What did you have in mind?  If you have
a C-64 BASIC program that contains fewer than 8104 bytes, you can program an 8
Kbyte EPROM (or OTP ROM) so that on power up (or reset) the program will be
ready to run.  Run this BASIC program:

10 poke55,.:poke56,160:clr:print
20 fori=900to988:ready:pokei,y:a=a+y
30 next:ifa=12101then50
40 print"data statement error":end
50 print"enter filename (device 8)."
60 print:inputf$:iff$=""thenend
70 print:print"writing file..."
80 open8,8,1,f$:fori=900to988
90 print#8,chr$(peek(i));:next:close8
100 data9,128,94,254,195,194,205
110 data56,48,142,22,208,32,163,253
120 data32,80,253,32,21,253,32,91
130 data255,88,32,83,228,32,191,227
140 data32,34,228,169,128,133,252
150 data169,91,133,251,160,0,169
160 data1,133,253,169,8,133,254,162
170 data32,177,251,145,253,200,208
180 data249,230,252,230,254,202,208
190 data242,32,51,165,165,34,105
200 data2,133,45,165,35,105,0,133
210 data46,32,99,166,76,157,227

A file will be written to disk; suppose that it is named "first".  Concatenate
"first" with your program:

open1,8,15,"c0:a=first,program":close1

Then program an 8 Kbyte ROM with the data in "a".  When you prepare the
cartridge, make sure that -EXROM (pin 9) is connected to ground (pin 1), and
that -GAME (pin 8) is not connected to anything.  When you reset (or power up),
you will see the startup screen.  But your program will be in memory, and may
be either listed or run.

--
I pressed RETURN, and the message said, "Missing GOSUB".

                          John