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To do this we add a constructor call to UPDCRAMPTR, which is the ROM routine that fixes up CRAM_PTR to match the screen location pointed to by SCREEN_PTR. This adds two additional bytes to programs using cputc() or other routines that call it. These are in theory recoverable, but the VIC-20 does not yet free space used by constructors after the constructors have been called. Thanks to <greg.king5@verizon.net> (GitHub: greg-king5) for investigating the difference in the VIC-20 KERNAL from the C64 and proposing this solution to the problem.[1] [1]: https://github.com/cc65/cc65/issues/946#issuecomment-538502820 |
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| .. | ||
| emd | ||
| joy | ||
| _scrsize.s | ||
| break.s | ||
| cgetc.s | ||
| clrscr.s | ||
| color.s | ||
| conio.s | ||
| cputc.s | ||
| crt0.s | ||
| devnum.s | ||
| get_tv.s | ||
| irq.s | ||
| joy_stat_stddrv.s | ||
| joy_stddrv.s | ||
| kbhit.s | ||
| kbrepeat.s | ||
| kernal.s | ||
| kplot.s | ||
| libref.s | ||
| mainargs.s | ||
| randomize.s | ||
| revers.s | ||
| status.s | ||
| sysuname.s | ||
| waitvsync.s | ||