[cc65] Magic Desk Cartridge Demo problems

I''ve been working on a cartridge library for the C64 and have been creating a demo for the Magic Desk cartridge format.� Most of it seems to work, even the banking strategy.� However, I'm having a problem: certain library functions aren't functioning properly.� cputsxy() displays garbage.� As the text starts in the proper location, it seems to me that either cputchar() or cputs() is at fault.� The _randomize() and rand() functions produce results that are too regular for my purpose.� I copy the LOWCODE, CODE, DATA, RODATA and bank access code to RAM upon startup, so unavailability of these functions shouldn't be a problem.� Some code snippets follow:
--------------------------
void __fastcall__ bankrun (unsigned char codeid);
--------------------------_bankrun:
�;cmp�#-1
�;bne�*+5
�;jmp�_exit
�asl
�asl
�tax
�lda�_codetable,x
�sta�ptr1
�lda�_codetable+1,x
�sta�ptr1+1
�lda�_codetable+2,x
�sta�$DE00
�lda�#$00
�sta�sp
�lda�#$D0
�sta�sp+1
�ldx�#$00
�txs
�jmp�(ptr1)
--------------------------
magiccart.h
--------------------------
//Main routine table.� Define in your code as the locations of your main
//parts, where each entry determines a module in your program.
//Put in RODATA segment.
extern const struct codetable {
�void*��calladdr;�//Address of routine in cartridge bank.
�unsigned char�bank, ��//Bank containing routine.
���x;��//Padding--no meaning.
} codetable [];
//Transfer control to a different module in your code.
void __fastcall__ bankrun (char p);�//p is the ID of the module, as in the codetable
�����//subscript.
--------------------------
main.c
--------------------------
#define numparts 2
#pragma codeseg��("CODE2")
#pragma rodataseg�("RODATA2")
static const unsigned char partid[]={1,2};
void main()
{
�unsigned char c;
�bgcolor (1); bordercolor (4); //textcolor (5);
�//clrscr();
�puts�("\f\x93\x12\x89 Screen Demo of MagicDesk cartridge fmt.\x92"
��"�� by \x9aJoseph Rose\x99, a.k.a. \x96\x12Harry Potter\x99\n"
��"----------------------------------------\x90"
��"Choose your demo:\n\n"
��"1.� Ink Blot\n"
��"2.� \x1C""C\x81o\x9El\x1Eo\x1Fr\x90 Ink Blot\n"
��);
�while (1) {
��c=cgetc()-'1';
��if (c<numparts) bankrun (partid[c]);
�}
}

#pragma rodataseg�("RODATA")
const struct codetable codetable [] =
{
�{&main,��1},
�{&blot,��2},
�{&colorblot,�2}
};
#pragma rodataseg�("RODATA2")

--------------------------
blot.c
--------------------------
#pragma codeseg��("CODE3")
#pragma rodataseg�("RODATA3")
...
void blot ()
{
�static unsigned i;
�_randomize ();
�bordercolor (3); bgcolor(1); textcolor (0);
�clrscr ();
�for (i=0; i<20*40; ++i) {revers (rand()&1); cputc(' ');}
�revers(0);
�cputcxy (0,24,"Press any key to continue...");
�while (!kbhit());
�cgetc();
�bankrun (0);
}

--------------------------
I compiled the program with cl65, and the above is the problem.� When I did it the long way, (i.e. cc65/ca65/ld65) the screen flashed then displayed the C64's blue screen without the text.� If it helps, I didn't implement the IRQ stub.
--------------------------
Joseph Rose, a.k.a. Harry Potter
Working magic in the computer community

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