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  • Confounded DEF FNCan anyone see why this is going wrong? I've been tinkering with it since tea time and got nowhere. [code] 2 DEF FN t$(n,t,d) =STR$ INT (n/t)…

    ... the same PRINT statement; the calculator stack doesn't get reset ... another statement and reset the calculator stack, so the space used ...
    Battle Bunny Battle Bunny August 2013 Sinclair Basic
  • Confounded DEF FNCan anyone see why this is going wrong? I've been tinkering with it since tea time and got nowhere. [code] 2 DEF FN t$(n,t,d) =STR$ INT (n/t)…

    ... way to get both the calculator & machine stacks included when ...
    Battle Bunny Battle Bunny August 2013 Sinclair Basic
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    [QUOTE=bverstee;715420]I'm curious how different the rates from mail and parcels are in other countries.[/QUOTE]

    Web-site usps.com has a calculator for prices from US
    Shaos Shaos August 2013 Hardware
  • At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…

    Picked up a Commodore 796M calculator at the car boot. Date ...
    Hercules Hercules August 2013 Chit chat
  • RND cyclical behaviourGood evening. I'm playing with RND function to show its cyclical behaviour, i.e. after 65536 calls to it, the next one will return the same value of …

    ... /> RNDFUN: ld b,$1D ;B= calculator code for VAL
    rst ...
    Battle Bunny Battle Bunny August 2013 Sinclair Basic
  • Sinclair calculator reverse-engineered[url]http://files.righto.com/calculator/sinclair_scientific_simulator.html[/url]

    ... =http://files.righto.com/calculator/sinclair_scientific_simulator.html]this[/URL] ... of the Sinclair Scientific calculator and figured out how ... a cheap four function calculator chip. Best of all ... page has an interactive calculator that live steps through ...
    JamesW JamesW September 2013 Sinclair Miscellaneous
  • Sinclair calculator reverse-engineered[url]http://files.righto.com/calculator/sinclair_scientific_simulator.html[/url]

    [url]http://files.righto.com/calculator/sinclair_scientific_simulator.html[/url]

    Just for info
    DaRkHoRaCe DaRkHoRaCe September 2013 Sinclair Miscellaneous
  • Your latest retrogaming purchaseAs there is another thread about gaming purchases, It would be nice to know your latest retrogame adquired, preferably Spectrum, but of course other …

    ... it intended to sell Radionics' calculator and TV interests; they were ...
    RobeeeJay RobeeeJay September 2013 Games
  • Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…

    ... /zx-comp/mccalc.zip]ROM calculator[/url] feature for reference.
    Battle Bunny Battle Bunny September 2013 Sinclair Miscellaneous
  • sinclair watch on antiques road show:) and his radio also.. haaaw much ? next week I will be on it.. with my classic collection of cardboard covered sinclair releases.. none of that …

    under valued,

    still better than a few years back when someone had a boxed Sinclair calculator, special limited edition for employees, and dozy twonks had it on the intro, laughed and said put it in a drawer will be worth something one day
    thx1138 thx1138 September 2013 Chit chat
  • sinclair watch on antiques road show:) and his radio also.. haaaw much ? next week I will be on it.. with my classic collection of cardboard covered sinclair releases.. none of that …

    ... someone had a boxed Sinclair calculator, special limited edition for employees ...
    mel the bell mel the bell September 2013 Chit chat
  • sinclair watch on antiques road show:) and his radio also.. haaaw much ? next week I will be on it.. with my classic collection of cardboard covered sinclair releases.. none of that …

    ... />
    I have a commodore calculator here, it's from the ...
    fog fog September 2013 Chit chat
  • sinclair watch on antiques road show:) and his radio also.. haaaw much ? next week I will be on it.. with my classic collection of cardboard covered sinclair releases.. none of that …

    I did used to have a pocket calculator collectors price guide book.
    thx1138 thx1138 September 2013 Chit chat
  • Returning to BASIC from asmI never had to do it till now but there is always the first time :) At machine code program start I preserved SP register and all the other ones. A…

    ... altered system variables, left the calculator stack unbalanced, overwritten items on ...
    Battle Bunny Battle Bunny September 2013 Development
  • iOS7 ReleasedGood news, we can all download Apples newest software today! :) Am trying to download and install for the iPhone & iPad, but Apples servers are rathe…

    ... address book, calendar, appointment scheduler, calculator, world time clock, games, electronic ...
    ADJB ADJB September 2013 Chit chat
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    [QUOTE=Shaos;727047]Really? Is it a bug or feature? ;)
    Which address?[/QUOTE]

    It deliberately tries to write to #0000 during a calculator operation, and there's a bug where the screen scroll rolls over into #3FFF.
    chev chev October 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    ... write to #0000 during a calculator operation, and there's a ...
    Shaos Shaos October 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    [QUOTE=aowen;727061]It deliberately tries to write to #0000 during a calculator operation...[/QUOTE]

    Does it mean any basic math?
    Shaos Shaos October 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    IIRC the Spectrums internal calculator uses address &0000 to ...
    1024MAK 1024MAK October 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    [QUOTE=Shaos;727208]Does it mean any basic math?[/QUOTE]

    Had to look it up. It's the skip constants routine at #33F7. Overwrites the first five bytes of the ROM. Can contain any value at all. Gets called during calculator operations.
    chev chev October 2013 Hardware
  • SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…

    ... instruction set for its internal calculator which probably saves a heap ...
    chev chev October 2013 Sinclair Basic
  • SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…

    ... paging just to use the calculator.
    [quote]"48kers can try ...
    chev chev October 2013 Brand new software
  • Use PLAY without the 128 ROMHere's a little thing I wrote called SoftPLAY: [url]http://www.worldofspectrum.org/forums/showthread.php?t=45259[/url] Now you can use the PLAY comm…

    ... a timing value for the calculator loop that gives something closer ...
    chev chev October 2013 Sinclair Basic
  • SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…

    ... does use the floating point calculator.
    chev chev October 2013 Brand new software
  • SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…

    ... does use the floating point calculator.[/QUOTE]

    Then ok ... rom routines and floating point calculator (I must make some patches ...
    velesoft velesoft October 2013 Brand new software
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... " ; version number

    ; THE 'CALCULATOR' RESTART
    org 0x0028
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    [code]; --- THE PSG and LOUDSPEAKER ROUTINES ----------------------------------------

    ; THE 'SOUND' COMMAND
    org 0x0374
    sound_4:
    rst next_char ; advance pointer

    org 0x0375
    sound:
    call expt_2num ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... br /> call expt_exp ; parameter to calculator stack
    call syntax_z ; ... call use_zero ; put zero on calculator stack
    jr sa_code_2 ; immediate ... call use_zero ; put zero on calculator stack
    jr sa_code_4 ; immediate ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... ; remove from
    fdel ; calculator
    fce ; stack
    push ... ; put on calculator stack
    fwait ; enter calculator
    fstk ... it
    fce ; exit calculator
    exx ; alternate register ...
    chev chev October 2013 Development
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