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re: [midatlanticretro] Re: Using 2SIO to download BASIC into an Alair without a disk drive or cassette.

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  • Bob Applegate
    ... If the hex address ends in 00 then it s a page boundary. What was the address where it failed and what type of RAM chips are on the boards?
    Message 1 of 15 , Feb 26, 2010
      Bill Degnan <billdeg@...> wrote :


      > I can't tell if it's a page boundary or not.

      If the hex address ends in 00 then it's a page boundary. What was the address where it failed and what type of RAM chips are on the boards?


      ___________________________________
      NOCC, http://nocc.sourceforge.net
    • Bill Degnan
      I will take a look. I may not have a terminator that works. I have to check bd ... Alair without a disk drive or cassette. ... each ... number of ... my
      Message 2 of 15 , Feb 26, 2010
        I will take a look. I may not have a terminator that works. I have to
        check
        bd

        -------- Original Message --------
        > From: "Dan Roganti" <ragooman@...>
        > Sent: Friday, February 26, 2010 2:24 PM
        > To: midatlanticretro@yahoogroups.com
        > Subject: Re: [midatlanticretro] Re: Using 2SIO to download BASIC into an
        Alair without a disk drive or cassette.
        >
        > Bill Degnan wrote:
        > > I am not using a terminator.
        > > My memory tests so far have all been manual read/write/read tests at
        each
        > > page location 0000, 1000 - F000. I have swapped RAM cards into a
        number of
        > > configurations, and I usually get the same result. It's possible that
        my
        > > 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.
        >
        > =Dan
        >
        >
        >
        >
        >
        >
        > ------------------------------------
        >
        > Yahoo! Groups Links
        >
        >
        >
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