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<1…17181920212223…34>
  • any decent wargames produced on the speccy in the last 20 years?we are looking for strategy/wargames to review in the "Frontline" page(s) of the new Crash annual

    ... .org/infoseekid.cgi?id=0002854]Legends of the Land[/url]

    kind of like a LOM type thing ... />
    There's a lot of Russian language strategy games if ... barrier I'm sure some of them are quite good, some ...
    dm_boozefreek dm_boozefreek May 2017 Games
  • endless runner project..So I'm thinking of writing a small tutorial series on writing games for the speccy in C, and figured that an endless runner would be an easy example …

    ... just sends and receives streams of bytes that can be in either ... , underline, etc. A list of vt100 escape sequences can be ... to printf using the features of whatever terminal driver is attached ... to read terminal input instead of scanf() directly. Text input is ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Development
  • Super Wonder Boy antimultiface[url="http://bizzley.com/"]Bob Pape's book[/url] mentioned that Rob Hylands put Multiface protection in Super Wonder Boy. The program can detect whe…

    ... must use at least 2 bytes on the stack (the ... most packers can detect sequences of bytes like that (sequences that are ... similar to their own "packed" bytes) and leave them "uncompressed". With ... those bytes you may build a malformed ...
    Zup Zup May 2017 Development
  • My re-creacton of the Z80 8-bit Universal IDEI looked into my draw with various bits & bobs for PC and I found there a CF-IDE adapter, HDD ribbons and two CF cards. So, I was thinking to myself,…

    ... able to share this piece of software? I am really interested ... in the idea of 8-bits in IDE mode ... user friendly. It reads 20 bytes off the card so you ... to put some recognisable pattern of bytes on the card with a ...
    guesser guesser June 2017 Hardware
  • How to automatically find the character set in a gameThis is all completely new to me, so please be patient. I've done some reading up on how character sets are handled by the Spectrum. I understand tha…

    ... recreate every 3*8 block of bytes into a bitmap, and then ...
    morph morph June 2017 Development
  • are there any machine code to basic converters?i know it sounds stupid but for amature programmers like me it would be great. i could speed up the basic on an emulator and it would give me more of…

    [quote="mik3d3nch;916404"]No disassemblers at all? I could have sworn I'd seen or heard of one for the Spectrum but cannot recall when or where.[/quote]
    A disassembler only turns a bunch of bytes into readable assembly language.
    rich_chandler rich_chandler July 2017 Sinclair Basic
  • ZX Spectrum Z80 Development Environment on WindowsHi Folks, Just wondering what the recommendation is for a ZX Spectrum Z80 Development environment on Windows? Getting fed up with hand coding Z80…

    ...
    ld b,8 ; number of bytes
    xor a ; clear carry ...
    djnz loop ; do 8 bytes
    ; ch1 now points to ...
    Alcoholics Anonymous Alcoholics Anonymous August 2017 Development
  • Interrupts, 16k Spectrums and snowI'm writing something for the 16k Spectrum and I want to use interrupts. The avilable documentation doesn't seem clear enough for me to figure out ho…

    ... player.. ok.. it's more of a percussion/effects player.. but ... . It's a couple of hundred bytes including the song data. I ... 't really have a lot of bytes to spare.

    It ...
    evilpaul evilpaul August 2017 Development
  • Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…

    We'll let you off having to include the comments in the number of bytes!
    colonel32 colonel32 September 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ...
    ld bc,8 ; Number of bytes to copy
    ldi ; INC ... of pointer data
    ld b,8 ; Loop for 8 bytes
    Paddy Coleman Paddy Coleman September 2017 Development
  • A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…

    ... is pressed
    ;(6 bytes)

    ;————————————————BEGIN ... control_count+1),a ;inject # of bytes to check into LD BC ... (control_count+1),hl ;inject # of bytes to check into LD BC ... of the first instruction for SMC injection
    ld de,9 ;# bytes ...
    Ast_A_Moore Ast_A_Moore October 2017 Development
  • Is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of fileHi, is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of file. E.g.: I have a Tape-Code-File Start f…

    ... machine stack to use bits of the ROM without having to ...
    length = number of bytes to load from start of CODE data block (
    Battle Bunny Battle Bunny October 2017 Sinclair Basic
  • 1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …

    Yup, gain speed at a cost of spending extra bytes, or save lots of bytes and the game runs slightly slower. It is a tough choice.

    Well done for shaving those bytes and gaining speed too.
    MatGubbins MatGubbins November 2017 Development
  • Witchcraft: Nirvana, Bifröst and such[url="http://www.rgcd.co.uk/2011/10/buzzsaw-zx-spectrum.html"]"When considering this next to nearly every other ZX Spectrum game though, Buzzsaw is l…

    ... 189,189=48573 leaves gaps of dozens of bytes around the table that ... plonk the stack in one of the gaps, or actually try ... have your interrupt routine consist of one RET instruction - or at ...
    joefish joefish January 2018 Sinclair Miscellaneous
  • 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…

    ... is not filled with thousands of bytes of $ff on 128K machines, either ...
    Ast_A_Moore Ast_A_Moore January 2018 Assembler
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... hardware (that's one of the parts I enjoy most ... only the minimum amount of pushes based on the ... max size of the 8bit loop counter, ... to save a couple of bytes instead of declaring a new variable ... a lot from that snippet of code, thank you for ...
    ST1 ST1 November 2018 Development
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... s a pretty standard way of zeroing the accumulator. However ... to save a couple of bytes instead of declaring a new ... although I did save three bytes as well. Loading the ... T states. The caveat of self-modifying code is ... lot from that snippet of code, thank you for ...
    Ast_A_Moore Ast_A_Moore November 2018 Development
  • counting in assembleri have this program which cycles through the character set. how do i do this with numbers say 0 to 65535? org 40000 ld b,120 ld (23612),a L…

    ... /> ld b,4 ; Number of bytes in number.
    and a ... display_decimal
    ld b,4 ; bytes in a number.
    xor ... ld hl,value ; Get address of number to print.
    ld ... 0,0,0,0 ; 4 bytes = 8 decimal digit.
    ...
    Luny Luny February 2019 Assembler
  • how are character sets (fonts) stored?i know its in 768 bytes of memory. does it store each character in blocks of 8 bytes or is it just a continuation of bytes from start to finish addre…

    ... character in blocks of 8 bytes” and “just a continuation of bytes from start ...
    Ast_A_Moore Ast_A_Moore May 2019 Assembler
  • Dun Darach : A beautiful way to waste the cold dark evenings.Well, I've 'Dun' it again. I've spent loads of my time pulling apart another game ready for remaking / modding etc. [url="http://www.luny.co.uk/inde…

    ... Brythan are there any legends of dragons having once existed. ... does have more of the ring of truth to it. ... ;

    "of course the story doesn't ... Barn" used by inhabitants of nearby settlements, is ... ? Maybe the first couple of times. Mainly it scared ...
    mik3d3nch mik3d3nch May 2019 Games
  • random number generator without using rnd in basicwhat is the simplest way to generate random numbers in basic (0-255), without using the rnd statement? i also want it to always generate the same…

    Just a fast overview of bytes in ROM, it is easy ... count of occurence is not uniform:

    10 most occured bytes ... are more than 27% of the rom
    Bedazzle Bedazzle June 2019 Development
  • Starwars IV opening crawl demo---------------------_______________________--------------------------- Starwars IV opening crawl demo on 128K :) [url=https://mega.nz/#!37BV…

    ... of total bytes occupied ( number of bytes mentioned before)
    second an total of X bytes ... />
    addressOfValues = B*Number of bytes+Number of bytes ( we have the mask at ...
    maeloterkim maeloterkim July 2019 Development
  • How to store and recall a "window"?I would like to memorize and then restore a rectangular portion of a screen, pixels and attributes. To make things easier, this "window" would be sit…

    ... 2048 bytes free on memory to save the top third of ... ' Parameters:
    ' souceaddr: memory address of source block to copy
    ' length: number of bytes to copy

    ... caracter set to the address of the image
    poke ...
    maeloterkim maeloterkim February 2020 Development
  • Dk'tronics and other similar "add on" Speccy keyboards . What can be done with them and when?. The underlying assumption I am making here is that people who have them will want to "hang on" to them and may also want to get them working . But …

    ... never even knew . The key legends , of course, were often just " ... have at least a couple of PCBs that are "electronically" ... Spectrum keyboard . The flexibility of the DK keyboard fitted in ... with the "electronic project" culture of 1984! Almost "everyone" in ...
    harriusherbartio harriusherbartio March 2020 Hardware
  • how can we load +3dos files in assembly?is there some way to load +3dos files in assembly, like calling bios routines somewhere? (like defining in registers the filename string address in m…

    Here's one of my load macros with an ... , which you can get details of in the [url="http://www ...
    colonel32 colonel32 April 2020 Development
  • 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…

    ... forward by a specified number of bytes, 244 is (I assume) ... start of the DJNZ command, then jumping back 12 bytes would ... out yourself what the result of that will be. Try ... it out for every value of A.[/quote]
    If ... useful might come out of it some time in ...
    The Mighty Dopethrone The Mighty Dopethrone September 2020 Development
  • Disassembly's I'd love to seeThis is not meant as some kind of request thread, as that would be grossly cheeky to ask for (however muchI wanted it) but I somehow felt a need to p…

    ... tried to look at bits of code by hand with just ... tell due to repeating patterns of bytes. A bit after that I ... Tunnel actually, one of the 16K 'modes' of it or Slippery Sid ...
    spider spider November 2020 Sinclair Miscellaneous
  • Disassembly's I'd love to seeThis is not meant as some kind of request thread, as that would be grossly cheeky to ask for (however muchI wanted it) but I somehow felt a need to p…

    ... tried to look at bits of code by hand with just ... tell due to repeating patterns of bytes. A bit after that I ... Tunnel actually, one of the 16K 'modes' of it or Slippery Sid ...
    Luny Luny November 2020 Sinclair Miscellaneous
<1…17181920212223…34>

Latest Posts

  • Fixed Speccy Software. And which games remained unfixed?
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