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- HINTS & TIPS
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- Howald 85281
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- I was having problems with all of my
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- games that required a joystick. It
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- seems the C-64 was doing left turns
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- all by itself with nothing in either
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- port. I have a joystick test routine,
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- but it only works in port one. Looking
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- at the schematic in the programmer's
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- reference manual, I saw that port two
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- goes to chips U1 and U28. Making sure
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- that the warranty on my C-64 had
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- expired, I opened it up and swapped U1
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- and U28 (Repairing computers is my
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- job.) I put it back together and
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- turned it on to see if the problem
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- changed. It did! It went away...no
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- more left turns and I found no other
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- problems.
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- - - - - - - - - - - - - - - - - - - -
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- More C-64 Tips
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- from
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- Michael Dombrowski
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- 1. Faster Execution:
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- Use a period (.) instead of zero.
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- EXAMPLE
- 10 IF X=. THEN 200
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- Leave off the variables in NEXT
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- statements.
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- 2. Bad Inputs:
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- Use quotes when INPUTing data. This
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- will prevent an 'EXTRA IGNORED'
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- error.
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- 3. UnDIMensioning an array:
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- 10 DIM A(10)
- 20 POKE49,PEEK(47):POKE50,PEEK(48)
- 30 DIM A(100)
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- >Note: This unDIMensions all arrays!!
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- 4. Cursor speed:
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- POKE 56325,x
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- x = 0 to 255, 0 is fastest.
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- ----------< end of article >----------
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