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  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... the line backwards when you scroll left, i.e. the opposite ... of POP

    To scroll new bits in, you can ... you will either need sprite routines that save/restore the backgrounds ...
    tstih tstih December 2016 Development
  • ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…

    ... you want with hand-written asm if it becomes necessary (most ... have to be written in asm for performance reasons.

    [/quote]

    Simple graphics routines are easy and are frequently ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Development
  • ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…

    ... . You can't remove routines you're not using and ... available as a pasmo .asm file so you can modify ... is much different from regular ASM coding at all, because ... of hours to write in asm. This allows quick try ... programmed in C rather than asm. You can make these ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Development
  • Testing your codeOk, guys, again I here with question. How do you test your works? I understand how to test functions and procedures mathematically (for example, g…

    ... memory or having to place routines or data at specific memory ... . Yes you can write in asm but it will take you ...
    Alcoholics Anonymous Alcoholics Anonymous January 2017 Development
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... .

    The .ASM file now holds two routines, PICT and RAND ...
    Battle Bunny Battle Bunny January 2017 Sinclair Basic
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... managed to cut 5x85ts routines to two routines. Using lots of self ... routine.
    Also, if I scroll the counter, I'll need ...
    FrankT FrankT February 2017 Assembler
  • c compiler benchmarkingI am going to have access to a number of commercial z80 compilers for a time for benchmarking, namely Hitech C v750 MSDOS (abandoned when Hitech was …

    ... mean some bespoke set of asm routines.

    An msx with ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Sinclair Miscellaneous
  • Project: ZX OpusHello my friends, I have been in need of a push lately so I thought if I post some of the work for this project here you guys (and gals) can help me …

    ... ASM in the wee small hours and I now have drawing routines ... a cell level - using an ASM draw routine and a bit ... into the BITS command in ASM to move the mouse pointer ... handling in regards to Z80 ASM - getting to load bytes in ...
    Zetr0 Zetr0 March 2017 Software
  • Beginner's z88dk help rqdI'm struggling to get my first z88dk C program to compile. My program is this: #include <spectrum.h> int main() { zx_border(INK_BLACK); } …

    ... section in file "crt_driver_instantiation.asm.m4". Each driver supplied ... z88dk/blob/master/lib/spec_crt0.asm"]different crt[/url] with ... /sound/bit/z80"]beep routines[/url]. All of these ... demo_sp1/BlackStar/src/ntropic.asm"]ntropic.asm[/url]. This music ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…

    ... my knowledge z88dk only has scroll up (in new libs zx ... />
    I got the assembler routines listed above from

    dbolli dbolli June 2017 Sinclair Basic
  • z88dk sp1lib with fzxThe numbers dont seem to display properly? fzx by itself works [quote] // for targets supporting fzx // zcc +zx -vn -startup=31 -O3 -clib…

    ... /display/z80"]library's asm routines[/url] by calling the ... of using the library routines is (a) they' ... pietro_bros/src/dc45922ba10ebb415c1326371e3e06c07602ea98/pietro_zx.asm?at=master&fileviewer ... file-view-default#pietro_zx.asm-110"]prints string and ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • z88dk : Support FunctionsJust a quick one here, I am looking to doing some dirty dirty code with C and load a screen$ file from the disk using "system( command )" - yes I …

    ... br />
    So my Code / ASM routines would handle reading, editing, deleting ... stuff (based on C / ASM routines) and presents it all to ... kind of string manipulation in ASM / BASIC before on here ... manipulate it within my C/ASM proggy.

    Thanks ...
    Zetr0 Zetr0 June 2017 Development
  • 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…

    ... typically need. Regular 8x8 print routines would sometimes allow to offset ... games' needs. Simple standalone print routines start at some 15-20 ... is always the case with ASM vs HLL's you can ...
    Hikaru Hikaru June 2017 Development
  • Z88dk installation DebianHi, I'm looking for some advice on installing Z88dk on my system. I have a few questions so if anyone could help me that would be great! My fi…

    ... make process:
    ds390/printf_large.asm:202: Error: undefined symbol encountered ... during assembly
    ds390/printf_large.asm:204: Error: undefined symbol encountered ... large repository of assembly language routines that implements the c standard ...
    Alcoholics Anonymous Alcoholics Anonymous June 2017 Development
  • Reading Disks via ASMI'm hoping to port my Amstrad game to the spectrum (See the link in my sig for info) I will be targeting the 128 and +3 - the game will not work on …

    ... you, you want to use ASM).
    - It can work on ... megs).
    - Many utilities and routines were published on magazines that ...
    Zup Zup July 2017 Development
  • z88dk terminalsto set up a terminal a bunch of numbers are needed: m4_zx_01_output_fzx(_window_1, 0x2330, 0, 0, 1, 14, 1, 19, 0, _ff_ao_Prefect, 14, 0, 14, 8, 1…

    ... window is full
    and scroll on when a key is ... in page mode instead of scroll mode. In page mode, the ... /target/zx/driver/terminal/zx_01_output_fzx.asm#L92"]here[/url]. For many ...
    ioctl(1, IOCTL_OTERM_SCROLL, 5); // scroll up five character rows
    Alcoholics Anonymous Alcoholics Anonymous July 2017 Development
  • z88dk terminalsto set up a terminal a bunch of numbers are needed: m4_zx_01_output_fzx(_window_1, 0x2330, 0, 0, 1, 14, 1, 19, 0, _ff_ao_Prefect, 14, 0, 14, 8, 1…

    ... zx_01_output_fzx_mine.asm[/b]. All this does is look for the scroll ... is we intercept the scroll message and do our ... attributes were present. The scroll is looking to do a ... subclassing works. A specialized scroll routine may have better performance ...
    Alcoholics Anonymous Alcoholics Anonymous July 2017 Development
  • Speeding up PRINT code in ROMHi Folks, I seem to recall that someone stated the PRINT command is rather slow because it has to handle screen and printer printing - is this cor…

    ... key) and PO_SCR (test for scroll) respectively, aren't called all ... as shorthand for the two routines). If I enter 111 in ...
    Battle Bunny Battle Bunny July 2017 Sinclair Basic
  • Disassembly starting from a tape fileFollowing on from the Atic Atak redefining keys thread, I was wondering how you'd go about disassembling the code from scratch. The approach used in …

    ... can devise all our own routines from first principles, that we ... 't decompilable (except into x86 asm, which not that useful for ... functional understanding of high level routines) or were obfuscated. So the ...
    colonel32 colonel32 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…

    ... can reuse the the polling routines you inject the ports and ... ="http://skoolkid.github.io/rom/asm/0205.html"]KEYTABLE_A[/url] - I ...
    colonel32 colonel32 October 2017 Development
  • Strange behaviour in very simple ASM program.Someone sent me this and it shows something strange. Here's the BASIC listing [code] 10 CLEAR 32999 20 FOR n=33000 TO 33009 30 READ a: POKE n,a …

    Have a look at [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0009010"]Zeus assembler[/url].

    Very useful for trying out short asm routines.

    Regards,
    Derek.
    dbolli dbolli October 2017 Development
  • i keep getting this error in my assemblerinvalid combination of opcode and operands (ex af,af') what does this mean and how can i fix it? im using spin assembler.

    http://www.breakintoprogram.co.uk/programming/assembly-language/z80/z80-library-routines/vector-asm/
    digital digital November 2017 Development
  • where can i get assembly language routines to play around with?preferably in .asm format or text with comments? ive googled it but there is very little

    ... made with inline asm. I recall there were some scroll libraries in ... there.
    You can write your own inline asm ... has translated your code into asm.
    hikoki hikoki November 2017 Development
  • ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…

    ... using one of the attr routines?[/quote]
    Yes, cut out ... . it only updates the attribute scroll on every 3rd pass. I ...
    Battle Bunny Battle Bunny November 2017 Development
  • ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…

    ... using one of the attr routines?[/quote]
    Yes, cut out ... . it only updates the attribute scroll on every 3rd pass. I ...
    digital digital November 2017 Development
  • How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…

    ... button. And also, machine code routines don't respond to the ... />
    [code]
    ; **************************************************************************
    ; mouse.asm - Copyright 2003 Chris Cowley
    colonel32 colonel32 November 2017 Sinclair Basic
  • Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…

    ... ="http://skoolkid.github.io/rom/asm/37B5.html"]sin routine[/url ... first time. Some of the routines, like [url="http://z80-heaven ...
    colonel32 colonel32 December 2017 Development
  • Help with adding graphicsHi, After like 20 years or so I started playing again with Spectrum stuff, especially programming. I tried to dig into machine code, but apart f…

    ... .

    Tommygun supports ASM, Boriel (inline ASM) and other languages. I ... an innovative debugger tool.
    Scroll down to find the latest ...
    hikoki hikoki December 2017 Development
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