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  • HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …

    ... are highly desirable in an external video card. (Other features of ... to be paged into high memory, then skim off reads in ... hardware switch to make the memory cloning listen for writes in ...
    joefish joefish May 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... using a microcontroller with some memory to build a HDMI signal ... a RGB SCART signal, an external adapter box can always be ... is no need for an external power source!


    Fruitcake Fruitcake May 2014 Hardware
  • MISSING M1 LINE ON +48????I was posting questions about my DIVMMC enjoy not working on one of my +48`s and have now got round to testing if its cpu related.Trouble is the one …

    ... the existing Sinclair BASIC, an external device may use the Z80 ... a machine code instruction from memory. It can then switch it ... 's own ROM into the memory map of the CPU and ...
    1024MAK 1024MAK July 2014 Hardware
  • Loading games from a old PC to a speccy?Hi all I've got an old Pentium 1 200Mhz PC which I'm sure could load games to my speccy seeing as my tape drive is knackered... I remember when w…

    ... games to be loaded from external players or pc's etc ... could fill the entire speccy memory in 2 seconds. This would ...
    dreamscape dreamscape July 2014 Sinclair Miscellaneous
  • Toastrack refurbishmentYesterday I opened a drawer in my old desk and discovered 2 complete toastrack 128s and a board only for the same. As I already have a fully working…

    ... TOTAL current drawn from the external ?9V? power supply. Some of ... they were heat damaged. From memory nothing else on the board ...
    1024MAK 1024MAK July 2014 Hardware
  • analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …

    ... menu that logs accesses to memory addresses.

    If you ... see how many times that memory address was accessed at runtime ... a real ZX Spectrum without external monitoring hardware.

    Regards ...
    dbolli dbolli July 2014 Sinclair Basic
  • What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…

    ... /> Also at that time (if memory serves) the Amiga was seen ... disk drive, defuinately had an external tv modulator and cost at ...
    paranoid marvin paranoid marvin August 2014 Games
  • What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…

    ... ]Also at that time (if memory serves) the Amiga was seen ... disk drive, defuinately had an external tv modulator and cost at ...
    MarkTheMorose MarkTheMorose August 2014 Games
  • Why on earth did I buy...Couldn't see a topic for this, so apologies if it does exist. Aside from games, what did you buy, and put away in a draw the next (or same!) day - …

    ... 'm just wondering how much memory was left for the actual ... the sense that the entire external library would be attached to ...
    Alcoholics Anonymous Alcoholics Anonymous September 2014 Sinclair Miscellaneous
  • ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…

    ... is exported "asm_atol" and several external functions are called "l_eat_ws, etc ... assigned to different blocks of memory. I know sjasm has something ... sections to relevant areas in memory. You can go further to ...
    Alcoholics Anonymous Alcoholics Anonymous September 2014 Emulators
  • Android memory questionErm, I was sure there was already a thread about this before but I couldn't find it, perhaps it's deleted or something. So I'm asking this again. I …

    ... design concept is "unallocated memory is wasted memory" or "what's ... />
    The fact that memory is allocated quickly and stays ... frequently). Moving those apps to external storage (SD card) is ... they are hanging around in memory until something better needs ...
    ccowley ccowley September 2014 Chit chat
  • Android memory questionErm, I was sure there was already a thread about this before but I couldn't find it, perhaps it's deleted or something. So I'm asking this again. I …

    ... memory and 8gb SD, note the SD is internal, not your external ... SD card..your moving the apps from the 1gb internal memory ...
    beanz beanz September 2014 Chit chat
  • Android memory questionErm, I was sure there was already a thread about this before but I couldn't find it, perhaps it's deleted or something. So I'm asking this again. I …

    ... because it just say insufficient memory (or something, I can't ... apps to external storage will free up some internal memory for more ... able to move apps to external storage, I've never used ...
    ccowley ccowley September 2014 Chit chat
  • AGD Forground blocks/spritesHi Guys Just wanted to ask if it was possible to have foreground or non transparent blocks in AGD 4.5 so that a character would look like he was wal…

    ... way would be to import external graphics routines to do this ... language instructions are represented in memory.
    jonathan jonathan September 2014 Development
  • Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …

    ... bit memory devices - except you expect an error in the external addressing ... test (writing random data to memory) isn't that bad and ... the data written to the memory cell doesn't show any ...
    PokeMon PokeMon September 2014 Hardware
  • ZX81 internal RAM board?Just a quick question to Zorn (amongst others). What would the issues be with fitting one of Zorn's RAM boards into an unexpanded ZX81? Seems to me…

    ... was wondering whether expanding the memory internally would cause any incompatibility ... isolation resistor (R2), so any external device that includes RAM and ...
    1024MAK 1024MAK October 2014 Hardware
  • Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …

    ... drams to form 16k of memory, would that machine merely be ... software stored in non-volatile memory at the beginning. If you ... 'configuration' (not firmware) and the memory it is stored in a ... difference if this 'rom' is external to the package? I suppose ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • Multi Multiface: the projectI posted some updates on Facebook yesterday about the development of the Multi Multiface, but here is the right place to share all technical findings…

    ... multiinterface use big sram memory and memory mapping is reconfigurable from ZX ... rom can be used different memory paging. For example it can ... memory or new extended model with more points. Interface use own external ...
    velesoft velesoft November 2014 Hardware
  • Multi Multiface: the projectI posted some updates on Facebook yesterday about the development of the Multi Multiface, but here is the right place to share all technical findings…

    ... samples can be read from memory and outputted to the DAC ... DMA transfers and data from external sram can be via DMA ...
    velesoft velesoft November 2014 Hardware
  • Early thoughts about creating a text adventureSo I always wanted to create my own ZX Spectrum text adventure. I tried looking at PAWs and GAC, but frankly I'm probably too stupid to use them. I…

    ... graphics, in order to conserve memory. So you won't be ... are some games that use external calls from PAWS to load ...
    Strident Strident December 2014 Development
  • Marvin on Android tabletIn portrait mode the keyboard seems way off (testing Shockway Rider in 128K) pressing compared to where the button graphic is. Also got the same joyp…

    ... the external SD card. I try to keep the internal memory as ...
    Vertigo Vertigo December 2014 Emulators
  • Is there any reason whya ZX Spectrum, could not be the platform for a new mathematical or scientific discovery?

    ... of memory unless you do lots of fiddly paging out to external ...
    guesser guesser January 2015 Development
  • Slow BrowsersI'm getting fed up with web browsers. I've been jumping from Firefox, to Chrome, then back to Firefox and even to Internet Explorer but still am expe…

    ... . I think it must have memory leaks, if too many tabs ... 3 drives and 3 TB external via USB 3 over 3 ...
    Scottie_uk Scottie_uk January 2015 Chit chat
  • New MEMFACE projectMEMFACE is my old project, but never finished. Now is PCB done (at the post office) and I write firmware for CPLD. MEMFACE is interface with external…

    ... flash eprom. Compatibility with MB02+ memory.

    Add through connector ... DIVMMC interface. Add possibility inhibit memory of external devices.

    Development ...
    velesoft velesoft January 2015 Hardware
  • HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…

    ... state? (that is: repeated memory reads). Or does it perform ... only, without actually reading the memory.
    [*][I]If[/I] ... one [I]could[/I] construct external hardware that changes the opcode ... about one tiny detail: the memory location fetched repeatedly, is ...
    RetroTechie RetroTechie February 2015 Development
  • HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…

    ... state? (that is: repeated memory reads). Or does it perform ... only, without actually reading the memory.
    [*][I]If[/I] ... one [I]could[/I] construct external hardware that changes the opcode ... about one tiny detail: the memory location fetched repeatedly, is ...
    TonyB TonyB February 2015 Development
  • New MEMFACE projectMEMFACE is my old project, but never finished. Now is PCB done (at the post office) and I write firmware for CPLD. MEMFACE is interface with external…

    ... memory managment. Work only as external zx rom, allram device, mb02 memory, divmmc memory ...
    velesoft velesoft March 2015 Hardware
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... an emulator that can trigger external events. My initial thought for ... have the option to play external soundFX.
    I know the ... an event in the code/memory (collisions, appearances, bonus, missiles etc ...
    Paul-J Paul-J June 2015 Emulators
  • Happy 30th birthday Amiga!A few days late but never mind. The first computer I could call my own, I have fond memories of the Amiga500 with Batman pack. For some reason I …

    ... .
    Added extra half meg memory in the trapdoor and then ... 120mb drive + 4mb to the external port.
    Played lots of ... with many hard drives and memory expansions - 4mb, 4mb+020, 8mb ...
    MatGubbins MatGubbins July 2015 Chit chat
  • ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …

    ... . A graphical list of the memory map, showing you black boxes ... , or loading one from an external file, only affects your editor ...
    clausjahn clausjahn July 2015 Emulators
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Latest Posts

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