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<1234567…34>
  • finding largest value (z80 assembly)suppose we have to write z80 program which requires to find the biggest value in a block of memory starts from the address 101h until address stored …

    ... to write z80 program which requires to find the biggest value in ... in 100h),then put this value in address 200h

    4electros 4electros April 2006 Development
  • The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …

    ... of a lot easier than Z80 but it doesn't hurt ... , I have posted the initial MAIN.Z80 template I have created to ... ' once and with no larger value than 16384. I found a ...
    ASM ASM October 2010 Sinclair Miscellaneous
  • Rotating Register PairsWhat's the best way to rotate left (or right) a register pair, so that (eg.) FE76 becomes E76F (or 6FE7)? I presume that passing the intermediate bit…

    ... may rotate a 16 BIT value any number of places from ... Z80 instruction 'add hl,hl' will shift a 16 BIT value one ... to another. Make sure the initial value of the 'carry' is set ... reference material on the 8080/Z80 rotate and shift instructions:
    ASM ASM October 2010 Development
  • Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…

    ... ://www.speccy.org/metalbrain/pause48k.z80[/url]

    PD: Details ... I changed BC value at $B058 for the initial pause from 0179 ... timing will just require another initial value here.
    Metalbrain Metalbrain August 2013 Games
  • Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…

    ... ://www.speccy.org/metalbrain/pause48k.z80[/url]

    PD: Details ... I changed BC value at $B058 for the initial pause from 0179 ... timing will just require another initial value here.[/QUOTE]

    Very ...
    jp jp August 2013 Games
  • I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…

    ... ;> A. However since the Z80 can only shift/rotate one ... shift is zero. The starting value in A, is essentially the ... desired value shifted left by one, which ... the bit pattern to its initial value.

    There are other ...
    GReW GReW March 2016 Development
  • Machine code routine neededHello! Please i'm looking for a short routine that can write the same value in a range of continous memory locations. For example, to write 255 val…

    ... your example, you write the value in A to consecutive memory ... instead, but registers in the Z80 are eight bits wide, each ... to 256 values. When the initial value ($E8) goes down to zero ... can load (HL) with a value directly: LD (HL),100. It ...
    Ast_A_Moore Ast_A_Moore December 2018 Assembler
  • XLR-8 Mastering utils: quick heads-upFirstly, only do this using an emulated 48K rubberkey at this stage because that's all it was ever tested on. "LOADER MAKER" - "First decrypter" - p…

    ... next decryption loop will be. "Initial value of R" - obvious. "Filename" is ...
    JonNorth JonNorth December 2005 Development
  • A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…

    ... in each turn, decreases its value and then, conditionaly jumps to ... .
    So, regardless of the initial value of L, as long as ... read CF to know the value of the bit that is ...
    mcleod_ideafix mcleod_ideafix January 2011 Development
  • I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …

    ... in the range of the initial value of HL.

    You ...
    Geoff Geoff September 2004 Development
  • Interesting Custom LoadersHi everyone, I was just thinking about custom loaders on the spectrum and I thought I'd ask you all what you thought was the best one. I'd have to …

    ... . So when I changed the initial value used to 3, the colours ... routine merely reduces the value of the initial pilot colour by 1 ...
    monty.mole monty.mole October 2004 Sinclair Miscellaneous
  • Starquake.Hi everyone I've just recently added Starquake to the HARP Database, if anyone should be interested in showing their skills in that game. For those…

    ... you start the game one value is already $7F ie. bit ... the right and watch this value
    fall... $3F, $1F, $0F ... /> Example
    ----------

    11111111 =initial value

    01111111 = I am ...
    Mr. Anonymous Mr. Anonymous March 2005 Games
  • MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …

    ... is taken from the numbers initial value. I have been using the ...
    Vladimir Kladov Vladimir Kladov April 2006 Emulators
  • Question about snapshot files....I've noticed that everytime I play "The Boss" (football management) it produces the same scores. I've played the first 5 games 3 or 4 times now and t…

    ... the system variable FRAMES, whose initial value depends on how long the ... /> Programs *could* alter their seed value by, eg, counting how long ... by using a different seed value for each of the landscapes ... still fairly deterministic as the value of R depends on the ...
    Alcoholics Anonymous Alcoholics Anonymous April 2007 Games
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... something on screen. The current initial value for q when starting a ...
    Einar Saukas Einar Saukas August 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... something on screen. The current initial value for q when starting a ...
    Einar Saukas Einar Saukas August 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... can eliminate one of the initial assignments.

    g) Instead ... ]

    This way the initial value of w won't matter ... 't have to assign an initial value to c(1) and c ...
    Einar Saukas Einar Saukas September 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    Another optimization: you can use LET b=1 instead of LET b=53 at the beginning. The initial value of b doesn't matter in this version, since the comparison is only valid when f=1.
    Einar Saukas Einar Saukas October 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... =53 at the beginning. The initial value of b doesn't matter ... ]

    Ops! Since the initial value of b doesn't matter ... (thus b will start with value 52), instead of the changes ...
    Einar Saukas Einar Saukas October 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... Saukas;218985]Ops! Since the initial value of b doesn't matter ... (thus b will start with value 52), instead of the changes ...
    Einar Saukas Einar Saukas October 2007 Development
  • Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…

    ... variable f a non-zero initial value, replacing this:

    [CODE ...
    Einar Saukas Einar Saukas October 2007 Development
  • Skooldaze TooDear WoSsers, Thanks to Skoolkid's disassembly I'm attempting to write a new "improved" version called [B]Skooldaze Too[/B]. As part of the improvem…

    ... causes : 1) I'd set initial value to 0 instead of 16 ... . 2) Value was being cleared during initialisation ...
    Jimmy Jimmy January 2010 Development
  • Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…

    ... is useful only if the initial value is a known constant plus ... one and the counter value is not used inside the ... loop to give the correct value. This leads to eating the ...
    Ricardo Cancho Ricardo Cancho April 2010 Development
  • Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…

    ... is useful only if the initial value is a known constant plus ... one and the counter value is not used inside the ...
    Alcoholics Anonymous Alcoholics Anonymous April 2010 Development
  • Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…

    ... /> ld (IX+2),31 ; =m initial value
    SETEND: ld a,52 ...
    Battle Bunny Battle Bunny September 2010 Sinclair Basic
  • .POK collection?Greetings, everyone! I enjoy pokes for Spectrum games, but sometimes before playing a game I need to couple through the-tipshop.co.uk to find the pok…

    ... . the last zero is the initial value, which helps you undo the ...
    Lady Eklipse Lady Eklipse October 2010 Games
  • A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…

    ... .
    So, regardless of the initial value of L, as long as ... read CF to know the value of the bit that is ...
    Metalbrain Metalbrain January 2011 Development
  • Macros in Z80 assemblerI don't know if the title of this post is good, so let me explain what I mean If have for example code [SIZE="1"]LDI LDI LDI LDI LDI[/SIZE] I can…

    ... />
    rept times, variable name, initial value, step
    .
    .
    .
    joefish joefish January 2011 Development
  • Locating the GOSUB stackI was wondering if someone could explain how to locate the dividing line between the GOSUB stack and the machine stack. Looking at the GOSUB routine …

    ... GO SUB due to the initial value.
    Dr BEEP Dr BEEP May 2011 Development
  • Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …

    ... string or by setting an initial value of "00000" and treating the ... hl,hl
    ;multiply ASCII value by 8
    ld de ...
    Turkwel Turkwel June 2011 Development
<1234567…34>

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