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  • PAPER&INK: screen/character differenciation?So I was looking at a type-in listing earlier and I got to wondering how the Spectrum differenciates between knowing that the PAPER/INK commands need…

    ... /> This will show the value of the first attr byte. The reasoning ...
    spider spider September 2019 Sinclair Basic
  • Maze Death Race - did it ever work?As a huge Rally-X fan I was always disappointed in MDR, but I cannot remember if that was just because it was a poor clone or if it was also because …

    ... the screen due to the ATTR trick. The way is yellow ... maze contains some not hidden ATTR (the programmer saved the maze ... ) x 130 (high) rectangle. The value 36 is the green field ...
    Pgyuri Pgyuri October 2019 Games
  • those darned recursive functions againI've been stuck on this one all evening. I want to dump out some memory in binary to debug a program. I've got a simple mod 2 division loop to do tha…

    ... on the right truncates the string if x is 1 or ... /> Note this produces a bad value for x=0 but I ...
    i love the z80s i love the z80s October 2019 Sinclair Basic
  • A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…

    ... also be stored as a string in the variables area or ... it unless you know the value of every chr or keyword ...
    moggy moggy March 2020 Sinclair Miscellaneous
  • FIY: inconsistencies between different versions of Pasmo.I don't know if this has been reported before, but I recently changed from Pasmo 0.54 to Pasmo 0.60 and "suddenly" there was a bug in my program. …

    ... IX/IY displacements to EQU value calculation and this seems to ... a '0' zero into the string if that begins with '-'.
    mr.spiv mr.spiv June 2020 Development
  • Help with CHR$ codes 0 to 5Hi, I'm looking a piece of code in a listing similar to: Let a$ = CHR$ 0 Let b$ = CHR$ 1 Let c$ = CHR$ 2 Let d$ = CHR$ 3 Let e$ = CHR$ 4 Let f…

    The values stored will be binary 0,1,2,3,4,5 and can be compared with any other string variable or function which returns a string value.
    Battle Bunny Battle Bunny June 2020 BASIC
  • FIY: inconsistencies between different versions of Pasmo.I don't know if this has been reported before, but I recently changed from Pasmo 0.54 to Pasmo 0.60 and "suddenly" there was a bug in my program. …

    ... IX/IY displacements to EQU value calculation and this seems to ... a '0' zero into the string if that begins with '-'.[/quote ...
    mr.spiv mr.spiv June 2020 Development
  • Mighty Maths ProgramsIn a break from typing in listings from 37-year-old magazines, I had a sudden urge to write a maths-related program, as I do, occasionally. Some, suc…

    ... same as before - take the string of numbers after the radix ... made a mistake in the value of pi in the Spectrum ...
    The Mighty Dopethrone The Mighty Dopethrone October 2020 Sinclair Basic
  • CODE instruction in array$ PRINTSo I'm still plugging away at BASIC and have found a line of code (another!) that's really puzzling me. The line is as follows: PRINT A$(P+Q TO P…

    A$(P+T) would return a string containing character 8 (one of the control codes). The CODE bit would then convert that to the integer value of 8.
    AndyC AndyC October 2020 BASIC
  • CODE instruction in array$ PRINTSo I'm still plugging away at BASIC and have found a line of code (another!) that's really puzzling me. The line is as follows: PRINT A$(P+Q TO P…

    Doesn't CODE return the ASCII code for the character? I thought it was VAL that returned the integer value of a string?
    LevelUp LevelUp October 2020 BASIC
  • z88dk sp1 Scene EditorHi, I've been developing for the last couple of weeks a scene editor (tile editor + scene tile placement+ export to c sp1 compatible) to aid me in…

    ... paper pixels to $E3 alpha value
    my $asmbooleanprefix = '%'; # :dbolli: ... /> my $zxattr = shift; # zx spectrum ATTR FBGRBGRB data

    our ... ->info( "Convert test zx ATTR array:" );
    foreach ( @zxspectrumtestattrs )< ...
    dbolli dbolli January 2021 Development
  • Who's NEXT?How about having a category just for Spectrum NEXT owners? I got mine on Monday, its the original issue, plain jane and quite enough for me to ge…

    ... lies in attributing a separate value to N$ like LET N ... directly give a numeric value to a string variable then perhaps you ... can assign a numeric value to ...
    mik3d3nch mik3d3nch September 2021 Sinclair Miscellaneous
  • Who's NEXT?How about having a category just for Spectrum NEXT owners? I got mine on Monday, its the original issue, plain jane and quite enough for me to ge…

    ... comparing the string you have in N$ with a given value, as ... opposed to needing the actual numeric value held ...
    AndyC AndyC September 2021 Sinclair Miscellaneous
  • Who's NEXT?How about having a category just for Spectrum NEXT owners? I got mine on Monday, its the original issue, plain jane and quite enough for me to ge…

    ... probably gives 0 if the string is not a number (try ... keeps asking for a numeric value if you don't type ...
    Paradigm Shifter Paradigm Shifter September 2021 Sinclair Miscellaneous
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... (ix+2), a ;loading the value
    ld (ix+3), 18 ... ;maximal length of the text string. It doesn't go to ...
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... (ix+2), a ;loading the value
    ld (ix+3), 18 ... ;maximal length of the text string. It doesn't go to ...
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... (ix+2), a ;loading the value
    ld (ix+3), 18 ... ;maximal length of the text string. It doesn't go to ...
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... before and after if the value in the a register is ... pass the length of the string (either put a 0 byte ... at the end of the string like this

    str ... the last byte of the string with 128 and handle that ...
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... before and after if the value in the a register is ... pass the length of the string (either put a 0 byte ... at the end of the string like this

    str ... the last byte of the string with 128 and handle that ...
    Kotek Kotek June 2022 Development
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