re: [midatlanticretro] Re: Using 2SIO to download BASIC into an Alair without a disk drive or cassette.
>interpreter. That's much larger than a memory test and it won't test
> Maybe I missed something but the subject implies you're loading a BASIC
memory. Use a smaller program that can test your hardware before trying to
load something larger.
>will use less unknown RAM to run.
> You're still using unknown RAM, but a memory test is a lot smaller and
>page boundary. How big are the RAM chips and what was the address again?
> The other thing is that I seem to remember your failure happened at a
Maybe it happened on a chip boundary.
>I can't tell if it's a page boundary or not.
I am working through this web site:
I will keep at it. I have followed every page closely including the
- I will take a look. I may not have a terminator that works. I have to
-------- Original Message --------
> From: "Dan Roganti" <ragooman@...>Alair without a disk drive or cassette.
> Sent: Friday, February 26, 2010 2:24 PM
> To: email@example.com
> Subject: Re: [midatlanticretro] Re: Using 2SIO to download BASIC into an
> Bill Degnan wrote:
> > I am not using a terminator.
> > My memory tests so far have all been manual read/write/read tests at
> > page location 0000, 1000 - F000. I have swapped RAM cards into anumber of
> > configurations, and I usually get the same result. It's possible thatmy
> > laptop serial port is not right? Not sure yet.
> Anytime you add more loads on that bus, by adding more cards, it's wise
> to use a terminator card. The signal quality begins to degrade by the
> consequence of electrical reflections between all the drivers from more
> cards on the bus.
> I uploaded some memory tests that I found online to here. One of them is
> short that you can thumb-in. It's in assembly still, it's not a
> comprehensive test but it's a start, under folder S-100 Test Code.
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