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scratchpad ram — Parallax Forums

scratchpad ram

ArchiverArchiver Posts: 46,084
edited 2004-06-24 21:17 in General Discussion
I have a program that uses multiply slots on a BS2e. I am trying to
pass values from one slot to another using scratchpad ram. However,
when I try to retreive them from the scratchpad in another slot, their
location has changed or do not show. Can anyone help me with this?

Thanx, ninjahtek

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-03-06 16:09
    I've only seen this problem when I was using a variable pointer to offset my
    "package" being stored in SPRAM. make sure you're actually writing to the
    locations that you think you are.

    -- Jon Williams
    -- Parallax


    In a message dated 3/6/2003 8:23:12 AM Central Standard Time,
    kraftcom@a... writes:

    > I have a program that uses multiply slots on a BS2e. I am trying to
    > pass values from one slot to another using scratchpad ram. However,
    > when I try to retreive them from the scratchpad in another slot, their
    > location has changed or do not show. Can anyone help me with this?
    >



    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2004-06-24 14:43
    Help!

    I need to store a WORD variable in 2 bytes of scratch RAM on a BS2p.
    I have not been able to find any references to this. Can anyone point
    me in the right direction?

    Thanks for the help.

    Harris Pate
  • ArchiverArchiver Posts: 46,084
    edited 2004-06-24 21:17
    Uh... the Help file.

    If you open it up, you'll find that the PUT keyword, under $PBASIC 2.5
    syntax rules let's you do this:

    PUT 0, Word $1234

    This will put $34 in SP location 0, and $12 in location 1 (words are
    stored little-endian). Under 2.0 syntax rules you would have to do
    this:

    PUT 0, myWordVar.LOWBYTE
    PUT 1, myWordVar.HIGHBYTE


    -- Jon Williams
    -- Applications Engineer, Parallax
    -- Dallas Office


    Original Message
    From: hbpate [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=CyHUzodHHLohKKvc3lvQAB2WpgOFeqvUtSWMLjS1qTfeDSp3vMOz152XHUrhGm0Y1JSJ9xlAcrrO4x8]hbpate@m...[/url
    Sent: Thursday, June 24, 2004 8:43 AM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Scratchpad RAM


    Help!

    I need to store a WORD variable in 2 bytes of scratch RAM on a BS2p.
    I have not been able to find any references to this. Can anyone point
    me in the right direction?

    Thanks for the help.

    Harris Pate
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