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<1…28293031323334>
  • How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…

    ... . But if an instruction has 4 t-states (and may have ... much of a difference. For 4 t-state instruction that's ... 11 ticks. So the way I imagine is to check ... the simplest loop itself takes way more time. So, how is ... this faked? One way I can think of is ...
    tstih tstih 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…

    ... is vastly superior to AGD 4.7/4.8.

    The ... will generate code in a way so that sprites in one ... re-acquainting myself with the way Next sprites work. I'm ...
    jonathan jonathan October 2019 Development
  • Light-weight "Rainy Day" ZX Spectrum Holiday KitSir Clive must have thought about it way back when he came up with the idea of a miniature TV . So where are we now this idea idea ? Here I will ass…

    ... must have thought about it way back when he came up ... files or similar.

    4) Light-weight "switch mode" power ...
    harriusherbartio harriusherbartio October 2019 Hardware
  • BasinC can accept Intel 8086 assembler inside REM-linesIn the year 1983m the firmware "ACS SOFTWARE" develope basic-spectrum with REM+assembler Finally, here are two sample routines you might like to try…

    ... a
    demonstration of the way the ZX Spectrum Machine Code ... /> 14 rem: mov eax,[eax-4]
    15 rem: @@1: ... ;je @@2;mov edx,[edx-4]
    16 rem: @@2: ... ecx,ecx;repe cmpsb;je @@4
    20 rem: movzx ... [edi-1]
    21 rem: @@4: sub eax,edx
    22 ...
    d2010 d2010 October 2019 Sinclair Basic
  • Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …

    ... to convert 1 bit to 4 bits like this:
    [code ... 0000 0000
    [/code]This way you can quickly create a ... the same for paper.
    4) Now comes the main algorithm ... bits using alg from point(4)
    write to img4bpp_addr
    tstih tstih November 2019 Development
  • Anyone interested in a brand new Sinclair ZX80 case?A member of the Sinclair ZX World forum is trying to get a run of brand new Sinclair ZX80 cases manufactured. He says this: [quote=jomac] I've b…

    ... printed in exactly the same way with the stickers produced and ... postage and there will be 4 versions of the case. Antenna ...
    1024MAK 1024MAK December 2019 Sales
  • Is there a simple way to type a Spectrum BASIC Program into notepad, save, then open in emulator?Hello. I have two emulators 1 under linux:- Fuse. 1 under windows 7 :- spin, also downloaded and run zx-editor. I just want to be able to type in …

    ... .
    Is there any easy way to do it?
    Any ...
    rholduser rholduser March 2020 Sinclair Basic
  • Will be away for at least a week.Just signing in for one hour, and typing this up in advance, hopefully i will be able to get it posted and do anything else I need, because one hour …

    ... money, glad I had the £4.99 for the hour.
    way round, ie. get through to ... . I wish there was some way of knowing early, some sure ...
    dmsmith dmsmith March 2020 Chit chat
  • Beta disk 3 to Beta disk 4 upgradeI am searching for a manual to upgrade a Beta disk 3 to Beta disk 4. I have a very early pcb without the Magic button. It is from Technology Research…

    I am searching for a manual to upgrade a Beta disk 3 to Beta disk 4. I have a very early pcb without the Magic button. It is from Technology Research.

    Has anyone information about this?


    Micky
    Mickymm Mickymm June 2020 Hardware
  • New WoS and ZXDBIt turns out new WoS is using [url="https://github.com/zxdb/ZXDB"]ZXDB[/url]! More precisely [url="https://github.com/zxdb/ZXDB/blob/c4bd3e40d81a8d47…

    ... -Disc Express[/url] along the way. Therefore you currently won't ... disguise. And it happened only 4 days after they falsely accused ... you could have taken all 4 years!!!


    [i ...
    Einar Saukas Einar Saukas June 2020 Updates
  • 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…

    ... .
    xor a ; quick way to load accumulator with zero ... ld a,68 ; green ink (4) on black paper (0),
    rra ; next bit (value 4) = key 3.
    push ... bit (value 8) reads key 4.
    call nc,mpu ; ... the current value?
    cp 4 ; is it at upper ...
    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 …

    ... .
    xor a ; quick way to load accumulator with zero ... ld a,68 ; green ink (4) on black paper (0),
    rra ; next bit (value 4) = key 3.
    push ... bit (value 8) reads key 4.
    call nc,mpu ; ... the current value?
    cp 4 ; is it at upper ...
    digital digital July 2020 Assembler
  • New Utility ZXSTLC[b]New Utility ZX Spectrum Tape (& Disk) Loader Creator[/b] I made this utility to easily create tape and +3 disk loaders for my projects and have…

    ... , 3, 4, 6 & 7 can be added this way with 2 ...
    TomD TomD August 2020 Brand new software
  • Streve Wozniac's Big Nostrils.I was watching an interview with Apple founder Steve Woaniac yesterday and I kept thinking, I never seen anyone with nostrils that big that was not a…

    ... that that way. The mind boggles.

    https://4.bp.blogspot ...
    Scottie_uk Scottie_uk September 2020 Chit chat
  • Games way better on speccy than on C64I was thinking about creating a comparison video about games that are way better on spectrum than on c64. What good examples can you come up with and…

    ... video about games that are way better on spectrum than on ...
    arttu arttu October 2020 Games
  • Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…

    ... : ld a, (de)
    bit 4, a
    jr z, b5 ... a much simpler and quicker way of mirroring bytes?
    FrankT FrankT December 2020 Assembler
  • A tier 4 conundrum!Like many areas of the UK, where I live has moved into tier 4 with very strict restrictions of what you can and can't do. I have bit of a conundrum a…

    ... live has moved into tier 4 with very strict restrictions of ...
    Your Spec-chum Your Spec-chum December 2020 Chit chat
  • ANN: Tipshop updated Saturday, 02 January 2021Saturday 02 January 2021 Happy New Year, Spec Chums! I was hoping to do this update for Xmas - but difficulties involving fermented apples got in th…

    ... fermented apples got in the way (hic!)

    * It's ... Dimension, The,
    Fun School 4 for 5-7 Year Olds ... , Fun School 4 for 7-11 Year Olds ...
    hackersanon hackersanon January 2021 Announcements
  • zx spectrum display corruption .. with lower ram module installed[img]https://photos.app.goo.gl/Gu6rjC5v21sZxwTX9[/img] [img]https://photos.app.goo.gl/FznVw8SkbbhWn5mh7[/img] another specie question : i have …

    ... the upper ram, or the 4 logic chips that drive the ... - D3 was not making its way to the rom.(but was ...
    mark8bit mark8bit January 2021 Hardware
  • z88dk SP1 Background animations the right wayThere are a few ways to animate background tiles. The most common is to just print the characters with PrintAtInv in the same position to achieve it,…

    ... .

    A more optimized way is to print a tile ...
    amateus amateus January 2021 Development
  • Speech synthesiser, 2 way extension lead for Spectrum, connecting screws, please.2 screws to connect Disciple to Spectrum, 2 way edge connector extension lead for Spectrum, Cheetah speech synthesiser for Spectrum, please. Many tha…

    2 screws to connect Disciple to Spectrum, 2 way edge connector extension lead for Spectrum, Cheetah speech synthesiser for Spectrum, please. Many thanks. Lamb.
    Lamb Lamb January 2021 Wanted
  • Valuation of 4 Sam Coupé games?I have 4 Sam Coupé games that I want to sell. They're all disc versions and practically mint condition and includes inlays/manuals. Well, perhaps exc…

    I have 4 Sam Coupé games that I ...
    Sokurah Sokurah February 2021 Chit chat
  • 128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…

    ... on composite ).

    Best way to fix it? Opinions?
    cj7hawk cj7hawk March 2021 Hardware
  • Slideshow...Is there any interest in MDR files with graphics slideshows? I was playing around with a Microdrive Superformat I'm working on ( I'm trying to mak…

    ... and it seemed a good way to test the tools, so ... next. It transitions around every 4 to 5 seconds.

    cj7hawk cj7hawk May 2021 Software
  • Killed Until Dead - Spectrum 128K versionI first got hold of this game about the same time as the film "Clue" started being shown on TV, and there was a "Miss Marple" series on TV, followed …

    ... RAM immediately above this
    4. Five blocks of $50A bytes ... loaded again as per step 4
    7. The menu is ... everything except point 8 by way of the following.
    * The ...
    Ritchie333 Ritchie333 August 2021 Assembler
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... was possible in the Sinclair way of doing things?

    4 years of last century that ...
    cj7hawk cj7hawk August 2021 Hardware
  • More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…

    ... 1986... This MCU could address 4 Mb of memory, was code ... the Loki had gone this way, they could have conceivably cut ...
    cj7hawk cj7hawk September 2021 Hardware
  • Best way to rip zx spectrum graphicsHi, I'm in the process to create a clone of REX just for fun. I'm just a programmer so, if I could rip the graphics from the z80/sna/tap image it …

    ... extract graphics in a consistent way? Could it be better to ...
    HexDump HexDump September 2021 Development
<1…28293031323334>

Latest Posts

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    dmsmith on April 22
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