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  • Prportional Ascii text scrollerA couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere y…

    ... by repeated calls to the routine, which stores the current character ... /> push hl ;save HL
    print:
    ld de,08000h ;current ... ;next text character
    ld (print+1),de ;store text position ...
    Arkannoyed Arkannoyed August 2018 Development
  • Work out screen address from attribute cellAttribute cell 22529 is equivalent to PRINT 0,1 position value. Is it possible to obtain these two values from the number 22529 in a simple MC rou…

    Attribute cell 22529 is equivalent to PRINT 0,1 position value.

    Is it possible to obtain these two values from the number 22529 in a simple MC routine?
    daveysludge daveysludge October 2018 Development
  • Passing parameter from BASIC to assembler routineWas there a "clean" way of passing parameter(s) from a BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR call? I fac…

    ... BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR ...
    mr.spiv mr.spiv November 2018 Development
  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…

    ... HL,SAVE ; Address of SAVE routine
    ld (CHADD),HL ; ... CHADD now points to our routine
    call 15619 ; ENTER ... />
    ld (TEMP),HL ; The routine for LOAD now repeats
    PRINT "Hello World"
    be runned ...
    Luzie Luzie October 2019 Development
  • Multi-Platform Arcade Game DesignerFirst of all, I should say Hello, having left the Spectrum scene around a year ago. I'm not planning to make a return but figured that I have some n…

    ... with PLOT and the DISPLAY routine allows you to display a ... just write AT 10 12 PRINT "HELLO". Comments are allowed too ...
    jonathan jonathan October 2019 Development
  • ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…

    ... snapshot from ZRCP
    -print-footer: print message on footer
    -put ... /> -debug CPU window: show interrupt routine pointer on im2 mode
    chernandezba chernandezba February 2020 Emulators
  • Randomised data samplingHere is something that could be written in BASIC, if anyone is interested. Lets say we want to sample a subset of a larger population, we can do t…

    ... 50000

    10 PRINT "Please wait a minute"
    20 PRINT "Filling Population Table"
    ... br />
    100 CLS: PRINT "FULL POPULATION DISTRIBUTION"
    105 ...
    To come next a routine to random sample this population ...
    dmsmith dmsmith April 2020 Sinclair Basic
  • how do i set this code up, so i can print more than one line of text?well i got it working but how do i set this code up, so i can print more than one line of text? with a loop or something? not sure where to start on …

    ... code up, so i can print more than one line of ... like to know how to print longer messages, as long as ...
    digital digital June 2020 Assembler
  • why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…

    ... game.
    call 3503 ; ROM routine - clears screen, opens chan 2 ... 's gunbase position,
    ; this routine is called prior to display ...
    ; Show player at current print position.
    splayr ld a ...
    digital digital June 2020 Assembler
  • this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …

    ... game.
    call 3503 ; ROM routine - clears screen, opens chan 2 ... 's gunbase position,
    ; this routine is called prior to display ...
    ; Show player at current print position.
    splayr ld a ...
    digital digital July 2020 Assembler
  • Speed comparison of BASIC CommandsHi everyone, I reactivated my account (thanks Lee!) due to starting to code some BASIC with my daughter. In the tips and tricks thread there is a …

    ... or faster ways to perform routine tasks in BASIC.

    PRINT commands compare speed-wise?
    48K 48K July 2020 Sinclair Basic
  • How to write a simple BASIC* horizontal scrolling game (Tutorial) [b]How to write a simple BASIC* horizontal scrolling game[/b] In this tutorial, we will be talking about how to write a simple BASIC* horizont…

    ... to set up a scrolling routine. You can find many ... Line 300, where we print a character to the right ... game.
    Then we print the score right after scrolling ... t=USR 60000
    200 PRINT AT 21,0;"score : ... ";s;
    300 PRINT AT RND*20,30;"*"
    Timmy Timmy September 2020 Development
  • 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…

    ... line is as follows:
    PRINT A$(P+Q TO P ... code line, it reads:
    Print the characters from index 481 ... is 8).
    i.e. PRINT A$(481 TO 488). The ...
    LevelUp LevelUp October 2020 BASIC
  • SP1: Print text outside the game sp1_RectHi, Is it possible to print outside the usual sp1_Rect defined for SP1? My idea is to have a small sp1_Rect for the game and print text outside fo…

    ... />
    Is it possible to print outside the usual sp1_Rect defined ... sp1_Rect for the game and print text outside for lifes, scores ...
    amateus amateus December 2020 Development
  • Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…

    ... textured/hatched fill M/C routine for the ZX Spectrum 48K ... /> 520 STOP

    9000 PRINT "{AT 10,11}WAIT..."
    9020 READ a$: PRINT "{AT 20,0}";a$
    Volker Volker February 2021 Software
  • pixel exact printingis there a way of doing this in basic? or by copying / modifying the rom code or using a completely new routine? so that print at x,x works more like…

    ... using a completely new routine? so that print at x,x works ... .co.uk/entry/8 ... Plot-Print

    unfortunately it doesnt ... to clear a square like print " " does, for sprite movement
    digital digital December 2021 Development
  • BASIC Bug: DEF FN after REMHello all, Having mused the Spectrum ROM disassembly by Drs Logan ad O'Hara, I wondered about how good ZX BASIC was at locating the DEF FN when call…

    ... FN a()=10
    20 PRINT FN a()
    [/code]
    20 PRINT FN a()
    [/code]
    routine that looks for DEF FN ...
    BloodBaz BloodBaz May 2022 BASIC
  • NMI Routine and Restarts in a new 128K ROMI'm presently engaged in creating AGD 5 with the intention of making it a pair of 16K ROMs for the 128K/+2. I'm fairly sure that the vast majority o…

    ... ROM 0 as the delay routine in RST 0 overran. Beyond ...
    jonathan jonathan July 2022 Hardware
  • Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…

    ... /> But if you want a routine which takes an array of ... />
    // A utility function to print array of size n
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... /> LET C = A + B
    PRINT C

    in assembly ... /> Note, we don't actually 'print' the results in the AL ... could use a ROM routine to print but that's another topic ...
    Arjun Arjun January 2002 Games
  • How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…

    ... /> LET C = A + B
    PRINT C

    in assembly ... /> Note, we don't actually 'print' the results in the AL ... could use a ROM routine to print but that's another topic ...
    Arjun Arjun January 2002 Games
  • Screen$ +3 disk to tape helpHi, I have several full screen pictures of my +3 disks (Screen$). How can I transfer these pictures onto tape without losing the last to lines beca…

    ... adaptation of the following routine

    10 PRINT #0; "Save Me ... a short
    machine code routine to save the complete screen ...
    Geoff Geoff February 2001 Sinclair Miscellaneous
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