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Thread: Peek-Poke and the TI-74?

  1. #1

    Default Peek-Poke and the TI-74?

    Hi. I have a TI-74 Basicalc and I was wondering if there was any way to peek and poke on the TI-74?

    I have the manuals but can't find anything about peeks and pokes. I've tried peeking and poking but to no avail. I have a functioning TI-74 but I don't have a cassette interface. I do have an 8K Ram module.

    Thanks for any help or infomation.

  2. #2
    Join Date
    Oct 2011
    Location
    Bedford, NH, USA
    Posts
    1,656

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    There is an article out there that compares the TI-74 to the previous TI CC-40:

    http://www.99er.net/ti74art.html

    In that article, the author states:

    Code:
    -- There is no direct access to assembly language except for
    CALL IO on the TI-74.  Therefore the following CALL's of
    CC40 BASIC are not available on the TI-74; GETMEM POKE PEEK
    LOAD EXEC RELMEM and DEBUG.
    So, I guess there's your answer. Apparently no PEEK & POKE in the TI-74.

    smp

  3. #3

    Default

    That's a shame. Thank you smp for the reply and information.

  4. #4

    Default

    I'm not a programmer or computer expert, just a hobbyist. If there are no peek or pokes available in TI-74 Basic, does anybody know of another way to "peek" and "poke" things in and out of memory?

    Edited to add:

    Did the factory have any external code or way to test or check out the TI-74 from the keyboard?
    Last edited by thumbs; February 4th, 2018 at 12:16 PM.

  5. #5

    Default

    Hi fellows -

    PEEK, POKE, & EXEC are available as callable sub-routines.

  6. #6

    Default

    Thank you for the reply, JDardner.

    How would I go about doing that on the TI-74?

    When I: Call Peek(256) or Call poke(256,1) I get an 'E13 Not found' error. If I: peek(256) or poke(256,1) I get an 'E17 Not defined' error.

    An guidance or help would be greatly appreciated.

  7. #7
    Join Date
    Oct 2011
    Location
    Bedford, NH, USA
    Posts
    1,656

    Default

    Quote Originally Posted by JGardner View Post
    Hi fellows -

    PEEK, POKE, & EXEC are available as callable sub-routines.
    You made me doubt myself (see my earlier post) so I got out my 74 and tried them. Nope, not available. Just to be certain, I scoured the Programming Reference Manual. Nope, nothing listed for PEEK, POKE, or EXEC.

    Why do you make that statement?

    smp

  8. #8

    Default

    Thank you JGardner for the reply.

    How would I go about doing that on the TI-74?

    When I: Call peek(256) or Call poke(256,1) I get an 'E13 Not found' error. If I: peek(256) or poke(256,1) I get an 'E17 Not defined' error.

    Any help or guidance would be greatly appreciated.

  9. #9

    Default

    Hi gents. Sorry about the delay - I'm enjoying the flu at the moment.

    The missing CC40 subs are available in the software package included

    with the PC-IF, & separately here:

    http://ftp.whtech.com/hexbus_cc40_ti...%20new%20PCIF/

    You need a PC-IF to install the software on the '74 - So far. The PC-IF

    manual has the details, available here:

    http://ftp.whtech.com/hexbus_cc40_ti...)%20manual.pdf

    But...

    Connecting a PC-IF to a modern computer is problematic - For openers you

    need a PC with a parallel port - If you have a 386 w/ a parallel port card,

    & a PC-IF, PCIF.exe works great...

  10. #10

    Default

    Amended -

    ... If you have a 186/286/386, running MS-DOS 3x - 6x, w/ a parallel port card,

    & connected PC-IF, PCIF.exe works great...

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