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| SWR questioning http://www.retrosoftware.co.uk/forum/viewtopic.php?f=73&t=475 |
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| Author: | Yrrah2 [ Fri May 14, 2010 1:17 pm ] |
| Post subject: | SWR questioning |
Hi people, A little SWR quesion again. If I'm correct, a SWR bank goes from &8000 to &C000. So when I write some data with *SRWRITE to location &B900 on bank 4 and try to read it again with *SRREAD it works fine. But now I have on my Master also some SWR in bank 0 & 1. So I tried to write the same info on the same place but then bank 0. Writing goes well. (well doesn't gives an error message) But reading gives the error message "Illegal address" Is there a difference between the slots 4 through 7 and the slots 0 through 3? And is there a way that I can read an write to slot 0 through 3? Cheers Koen |
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| Author: | MartinW [ Mon May 17, 2010 12:03 am ] |
| Post subject: | Re: SWR questioning |
I'm a bit new to this myself, but my understanding is that the cartridge slots (banks 0 - 3) are ROM only. They can be made R/W but a little electric hackery is needed to extend the R/W line up to where it's needed  Something along those lines - someone please correct me if I'm wrong? |
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| Author: | Yrrah2 [ Mon May 17, 2010 7:46 am ] |
| Post subject: | Re: SWR questioning |
Hi Martin, That would be strange.... This because I have 0 - 3 filled with RAM and I can load SWR images into it and run the applications from SWR. (like Exmon II, Basic Editor and much more) Also writing to an SWR goes well, but reading afterwards does not.   So it would be locked RAM when only using SRREAD? Is it possible to read out the SWR memory with Exmon II? Cheers Koen |
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| Author: | MartinW [ Mon May 17, 2010 11:57 am ] |
| Post subject: | Re: SWR questioning |
If you're sure that it's really banks 0 - 3 that you're writing to then no, I guess I'm wrong about them being ROM only. I could have sworn I saw a thread on STH about extending signal lines up through to the cartridge slots. Maybe that was for something else? |
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