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Author Topic: Hardware pin on an A500 to toggle via assembly  (Read 1286 times)

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Offline RedskullDC

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Re: Hardware pin on an A500 to toggle via assembly
« on: January 04, 2014, 09:55:43 AM »
Hi Kamiga,

Quote from: kamiga;756184


The idea here is that I have some VERY rudimentary memory tests implemented in assembly, and I'd like to trigger my logic analyzer on error or success.

Maybe a pin from the parallel port?

Ideally, there won't be any complicated chip-setup procedure, os libraries to load, or anything.

If I could just add/mov a 1 or a 0 into an address, that would be perfect.


If you are just testing the memory functionality (RTC appears to work, I just had a look at your web page), you could use the _CLKRD pin (GARY pin 22) as a strobe for your analyser?

Only requires reading the appropriate address range, no lib calls etc. $00DC0001

Cheers,
Red
Redskull @ Digital Corruption
A500, 4000/060-75MHz
WinUAE on Windows7-X64Ult
Minimig DE1
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