Posted By
Chicken
on 2009-01-07
00:01:07
 |  Re: Bug discovered in Basic
This bug was discovered by Mr. L of TEK more than 20 years ago 
The RCLR routine separates the low nibble, adds 1 (because basic uses color numbers 1-16 and not 0-15) and separates the low nibble again for output.
If the selected color source is currently set to 0F, it turns into 10 and then it outputs the low nibble, which is "0".
I wonder if it has been fixed in later machines. Acutally, I'm not sure if there have been any changes/fixes to the plus/4 ROMs ever. Well, the 3-plus-1 software has different versions, that's for sure.
So if youcould just try this on the real machine:
COLOR 4,16 RINTRCLR(4)
If anyone gets something else than 0, please report. Thanks 
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