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Search Again :: Adv Search 1000 results in 0.023s
<1234567…34>
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... issue 6a. I suspect the ROM may be bad, but other ... speccy removing the ROM gives a very specific screen pattern on bootup. That ... problem to the ROM.

    But the ROM (a NEC type ...
    Mikelone Mikelone April 2017 Hardware
  • Pentagon 1024SL 2.2 woesHey there,<br>I'm currently trying to get my Pentagon 1024SL 2.2 up and running for the second time.<br>Right now it's showing me the screen one woul…

    ... me the screen one would expect if no ROM is ... put into the machine (blue, white, black screen pattern, ... )
    - used the ROM from my Pentagon 128 (pulling ... resets to the service ROM bank which is empty ... the P1024SL 200ns]). P1024SL ROM works in my P128< ...
    Shockwav3 Shockwav3 May 2015 Hardware
  • ZX Spectrum 48K help and Hello :)Hello out there I am a long time admirer of the ZX Spectrum range of computers my first go at one was in the early 1980s with my dads ZX 80 now its …

    ... a problem with the ROM. The pattern on the screen suggests that *all ...
    Winston Winston January 2013 Hardware
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... tidbit about the screen pattern seen when ROM is disabled came ... below shows a typical screen. The border is white ... />
    - Disabling the ROM by connecting lower pin 3 ... .

    - The ROM and the Z80 get a ... me think that the ROM was faulty. The ULA ...
    Mikelone Mikelone April 2017 Hardware
  • Quick questionHello, can someone tell me what the screen looks like when you power a 48k spectrum that has no ROM chip installed ? Thank you. François

    ... suspicious welds (not on the ROM socket) that I corrected but ... the problem ? (Either on the ROM itself or elsewhere) I have ... RAM problem exhibit the same screen pattern ??

    Best regards,
    FrancoisL FrancoisL February 2018 Hardware
  • 'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…

    ... 293424]You could rewrite the ROM screen print routine and set it ... to write directly to whichever screen was paged into upper ... the accessibility of the "shadow screen" from BASIC.

    ... use some SAVE "file" SCREEN$ type command and reload operation ...
    Digital Prawn Digital Prawn August 2008 Sinclair Miscellaneous
  • Tape preservation toolsIn the latest MakeTZX thread of doom several people said that it would be good to have active development of tape decoding tools. I needed tape file…

    ... ;526120]Why embed the loading screen twice if the data is ... this to show/decrypt the screen ? However then we start making ... the people who implement PZX screen viewer nor those people who ... /> *) Unless it is a standard ROM screen block - in such case it ...
    Patrik Rak Patrik Rak April 2011 Emulators
  • Tape preservation toolsIn the latest MakeTZX thread of doom several people said that it would be good to have active development of tape decoding tools. I needed tape file…

    ... trivial to show the decoded screen, and it is trivial to ... the people who implement PZX screen viewer nor those people who ... right hassle, so having the screen in there would be easier ... /> *) Unless it is a standard ROM screen block - in such case it ...
    Andrew Barker Andrew Barker April 2011 Emulators
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... , it's impossible to boot. Screen full of moving colour patterns ... tries to boot from internal ROM (screen is first full of random ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…

    ... .

    After that the screen pattern changed and I looked for ...
    pkersey pkersey January 2014 Hardware
  • Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…

    Here's something which I converted from a BASIC routine in ZX Computing. The smallint conversion can be discarded if row,col are not derived from some calculation which might render a floating point result. (I can't get the code block to print fixed width, ...
    Battle Bunny Battle Bunny June 2015 Development
  • HELP!I'm trying to replace a bit in a byte as follows, but having some sort of brain freeze trying to get it to do what I want. A=00 if bit to replace …

    ... the fastest "masked sprite to screen" code I've seen. If ... bits as 1 and your pattern bits as 0) and then ... as your sprite pattern and HL pointing to screen byte it should ... 00110000
    (hl)= 10101010 (=your screen pattern)
    cpl a= 00110000 (4 ...
    tstih tstih February 2017 Development
  • Screen$ command, ROM routineHi All, Does anyone know which ROM routine to call for the Screen$ command (and/or the ATTR command)? Any comments on how well it works or the spee…

    ... anyone know which ROM routine to call for the Screen$ command (and ... what's what in the ROM disassemblies I've read (any ...
    R-Tape R-Tape January 2011 Development
  • Screen AttributesNot sure if this is a devolopment question but here goes... In my limited understanding, the 'attribute file' of a speccy is 5800h to 5AFFh and each…

    ... each character position on the screen. With bits 0 to 2 ... a limitation of the existing ROM and original 48k limit ??
    Saboteur Saboteur January 2005 Development
  • +2A ProblemHi ! I just got a +2A and it has a powerup problem. When I turn it on it just displays 1987 1987 over the first few lines and a random attributes p…

    ... and a random attributes pattern over the screen. It seems the ULA ... if it can be a ROM/RAM problem. The other thing ...
    Tom-Cat Tom-Cat May 2005 Sinclair Miscellaneous
  • Changing the colour of the screenCan anyone tell me the ROM command to change the paper colour of the main screen ?

    Can anyone tell me the ROM command to change the paper colour of the main screen ?
    Mr Millside Mr Millside June 2005 Development
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... to understand the way the screen is controlled.

    The ... output to the the screen and the rom sets out the memory ... locations of the screen ( and attributes ... would need to change the ROM,ULA and add more RAM ...
    Saboteur Saboteur November 2005 Hardware
  • ROM paging questionAssuming the Spectrum 128 memory map and port addresses, but two custom ROMs in place of the normal Editor and BASIC, what is the most efficient way …

    ... calling a routine in ROM-1 from ROM-0 so that when ... the routine in ROM-1 executes a RET ... of convenience assume routines in ROM-0 will use a ... address of the routine in ROM-1, which means the ... at 23296, immediately after the screen attributes.
    chev chev January 2006 Development
  • Spectrum 48K ROMHi Can anybody help I have an Issue 6a Circuit Board which has a faulty ROM Chip. Is it possible to program a ROM Chip with the 48K ROM and fit it as…

    ... Board which has a faulty ROM Chip. Is it possible to ... program a ROM Chip with the 48K ROM and fit it ... moment I have a black screen after trying a HN13128P Hitachy ... the pins, I changed the ROM link to H but all ...
    Martin Baugh Martin Baugh April 2007 Hardware
  • ZX80 with new ROM?There's an interesting ZX80 on sale from eBay US, with some included software. The ZX80 has the original keyboard, however the ROM appears to be the…

    ... be the ZX81 ROM - this picture of the screen certainly looks to ... the keyboard when updating the ROM...? Anyone got any ideas?
    hldswrth hldswrth October 2007 Sinclair Miscellaneous
  • Sinclair 128K+ Rom dead?While repairing one of these boards my mind was elsewhere and I put the rom back in the wrong way round and now it doesnt work (scrambled screen) alt…

    ... elsewhere and I put the rom back in the wrong ... now it doesnt work (scrambled screen) altho it did in the ... an 'eprom' rather than a rom right? Which means its programmable ... can anyone supply a working rom/eprom? For now i ... replaced it with a rom from a grey +2 ...
    ZX-MAD ZX-MAD April 2008 Hardware
  • Any BBC aware Specchums out there?After the UK101 and VIC20 emulators I've moved my sights onto emulating a BBC computer. This emulator will be different though in that it will be a Z…

    ... run the real BASIC 4 ROM, but the operating system ... the keyboard, writing to the screen, saving to tape, scrolling ... and run any Language paged ROM though. I have tested ... fill with an 8x8 bit pattern? I also need a ... draw a dotted line (of pattern byte 'b') with the ...
    Jimmy Jimmy August 2008 Development
  • alternate BASIC ROMI've come up with a few patches to the standard ROM to make it use the 128 shadow screen by default. The ROM is reorganised as follows: RAMTOP is se…

    ... the 128 shadow screen by default. The ROM is reorganised ... BASIC
    the shadow screen is selected by default< ... br /> the shadow screen is paged into 0xc000 ... now write to the upper screen area, including PLOT
    screen when it was being ...
    chev chev October 2008 Sinclair Basic
  • ANN: ZX Spectrum +2g ROM setI'm working on another modified ZX Spectrum. This one is based on the +2A. There's quite a lot of work to do on the hardware but the ROM set is prett…

    ... /> 3: The original 48 BASIC ROM

    The Spanish editor ... (available only in the lower screen):

    DELETE n, n ... /> UK (switch to UK editor ROM)

    USR 0 ... hardware enabled.
    SPECTRUM selects ROM 3 with the additional hardware ...
    chev chev June 2009 Hardware
  • Screen display at resetJust something for curiosity: When the Spectrum is reseted by for example NEW a very typical screen is shortly displayed. [IMG]http://i33.tinypic.c…

    ... example NEW a very typical screen is shortly displayed.

    ROM that writes the red lines ...
    Rickard Rickard September 2009 Development
  • Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …

    ... ; JP 16385) loaded at the screen RAM, so contention should be ... see, there is a periodic pattern that repeats every 64us, and ... speed of RAM, speed of ROM, and maybe, internal timmings at ...
    mcleod_ideafix mcleod_ideafix October 2009 Hardware
  • ISO ROM 128 with TR-DOS 5.05(cz)This is new correct version of ISO ROM for ZX + BETADISK. Some extra basic command is designed specially for use in conmination with TR-DOS 5.05(cz).…

    ... new correct version of ISO ROM for ZX + BETADISK. Some ... /debugger "Devastace" from tr-dos rom)
    ! (start DOS and ... "hallo" (print text "hallo" on screen - PRINT command is ignored)

    ISO ROM after reset no erase memory ...
    velesoft velesoft April 2010 Sinclair Basic
  • Rom Routines list ?Exist some document that show detailled the routines on the spectrum ROM ? Ad for the Spectrum +3 ? are they the same or exist more ? Example i was …

    ... the routines on the spectrum ROM ?
    Ad for the Spectrum ... /> Example i was watching the Rom routine called [B]PLOT-SUB ... see the point on teh screen !

    So i need ... routines that are on the Rom just to use them.
    arfgh arfgh June 2010 Sinclair Basic
<1234567…34>

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HitBox

Word Docs Hits
rom 15.6K 29.7K
screen 45.8K 73.8K
pattern 2.1K 2.7K

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