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Search Again :: Adv Search 1000 results in 0.014s
<1234567…34>
  • Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…

    ... ).
    I tryed to PEEK the ram (as the repair guide says ... has to be the first RAM chip (at least) or could ...
    gtsamour gtsamour January 2007 Hardware
  • Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…

    ... or other systems allowing to map RAM instead of ROM.

    omega omega June 2009 Sinclair Basic
  • Z80 Edge Connectors - ProjectsHello there my fellow Spectrum-mites I am looking to source a few of these connectors - while I could just rework some old ISA socket for proto's I …

    ... like that?
    +3 can map RAM page in ROM area, so ...
    orange orange March 2011 Hardware
  • Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3My Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3 is now available for download from: [url="https://c.gmx.com/sizx@gmx.com/DVQXAXrLRl2d…

    ... models of Speccy that can map RAM from $0000.
    GReW GReW February 2017 Brand new software
  • Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3My Space Invaders Emulator for the Spectrum 128/+2/+2A/+2B/+3 is now available for download from: [url="https://c.gmx.com/sizx@gmx.com/DVQXAXrLRl2d…

    ... models of Speccy that can map RAM from $0000.[/quote]
    thanks ...
    abelenki abelenki February 2017 Brand new software
  • Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…

    ... the rom there and map ram instead some time after ... there is a full 64k ram available.

    [ ... 32k-64k. The 32k ram chip will have 15 address ... that :- enable output from the ram chip when /MREQ=0, ... note no conflict with the ram chip). To do that, ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Hardware
  • POKE, PEEK and RANDOMIZE USRAnyone got a store of useful POKES, or RANDOMIZE USR statements with interesting effects? As a start, try anything from RANDOMIZE USR 1216 to RANDOM…

    ... ZX81 POKE (or, more probably, PEEK) once which would display the ... K, so "16" if the RAM pack was on and "1 ...
    The Mighty Dopethrone The Mighty Dopethrone October 2003 Sinclair Miscellaneous
  • Blood Brothers mapI checked the WOS update and had a peek at this ... my GOD it looks awful. A pefectly decent map completely and utterly destroyed by the use of the J…

    ... peek at this ... my GOD it looks awful. A pefectly decent map ...
    cyborg cyborg February 2004 Games
  • ZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…

    ... (which is probably normal since ram
    test takes a ... original
    Sinclair ZX 16k ram pack issue 3 .
    ... of the insides of the ram pack :

    [ ... ,A
    40 IF PEEK (N) A THEN PRINT " ... still a posibility of faulty RAM somewhere on the lower ...
    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
  • Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…

    ... (which has no onboard RAM and so is only supported ... the 512K battery-backed RAM and a snapshot button. ...
    [*]You can map different drive letters to different ... in the built-in RAM and are instantly available ... from the built-in RAM, including ZX80 and ZX81 ...
    glancaster glancaster January 2007 Hardware
  • Broken ram or what?Hi! I own ZX Spectrum 48K. When i run command PRINT PEEK 23732 + 256 * PEEK 23733, I should get answer 65535? But i get 49151. In my machine the upp…

    ... i run command PRINT PEEK 23732 + 256 * PEEK 23733, I should get ... test program which can test ram. It also says that machine ... has broken ram. And if i remove upper ...
    lillaolle64 lillaolle64 July 2010 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... ribbons.

    The PEEK test to determine if the ... bit of a tangled memory map at a chip level, ... br />
    The upper RAM, from 32KB to 64KB on ... Interface 2 which has a RAM test, the original fault ... and the short ram test failed with "RAM Error @8000 BTS ...
    Womble Womble August 2010 Hardware
  • Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …

    ... for a 48K Spectrum. Using PEEK to examine the system variable ... RAM, I used POKE to set it to various values and PEEK ... to see whether the RAM had retained the ... passed from testing lower RAM to upper RAM. Here is an example ...
    Zorn Zorn April 2012 Hardware
  • quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…

    ... DEF FN p(a)=PEEK a+256*PEEK (a+1):
    DEF ... /> LET loc=VAL VAL$ (CHR$ PEEK (a-3)+"$"):
    POKE a ... COPY string to RAM or RAM to string or RAM to RAM
    GO ... or destin location if in RAM;
    b$=source string expression ...
    Battle Bunny Battle Bunny July 2013 Sinclair Basic
  • DIY Issue 1 Internal 32K RAM expansionFollowing on from the information in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40173"]this[/URL] thread, I finally figured this ou…

    ... of the Issue 1 internal RAM module.

    The pinouts ... when the top 32K of RAM is addressed. Here's a ... machine saw 48K of RAM, verified with PRINT PEEK 23733 returning 255 ... machine is seeing 48K of RAM now and that there were ...
    balford balford January 2014 Hardware
  • From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…

    ... question is related to "quick RAM copy using LET in Basic ... buffer".
    - A zone of RAM with 160 bytes corresponding to ... that stores the v$ dim RAM position.


    When ... readed from RAMPEEK v$ dir RAM...
    [INDENT]POKE dir,byte ...
    Hark0 Hark0 March 2014 Sinclair Basic
  • Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …

    ... />
    MEMCHK = PRINT PEEK 23732 + PEEK 23733*256
    UPRAM85 = ... UPRAM170 = POKE 32768,170 : PRINT PEEK 32768

    Actions ... 2. MEMCHK returned 32767, upper RAM fault. UPRAM85 returned 93, ... screen and red bars" RAM test appears, after which ...
    Trafferth Trafferth August 2014 Hardware
  • 48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…

    ... points me towards checking the RAM.

    I have entered ... command listed...

    PRINT PEEK 23732 + PEEK 23733 * 256

    wep855 wep855 August 2014 Hardware
  • JHCon 2014Hello, not sure if this is the right category but JHCon 2014 will take place[B] from 28. to 30.11.[/B] at usual place - gymnasium in Jindrichuv Hrad…

    ... , Jindrichuv Hradec, Czech Republic
    - Map, GPS: 49.1476583N, 14.9993194E ... of machine code (USR to RAM, POKE, PEEK) is forbidden! USRs and ...
    Factor6 Factor6 October 2014 Announcements
  • 48K Memory MapHi, I'm having some trouble understanding the top of the 48K Memory Map. From reading elsewhere I have this as the memory map: 0 to 16383 - …

    ... top of the 48K Memory Map.

    From reading elsewhere ... have this as the memory map:

    0 to 16383 ... by running '[code]PRINT (PEEK 23730+256*PEEK 23731)[/code]
    Looking ...
    jonesypeter jonesypeter March 2016 Development
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... tried to enter the PRINT PEEK 23732 + PEEK 23733 * 256 command but ... />
    if I just PRINT PEEK 23732 I get 0.
    ram set.
    cypher007 cypher007 December 2016 Hardware
  • 48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …

    ... fine.

    PRINT PEEK 23732 + PEEK 23733 * 256 returns 32767

    POKE 32768,85 : PRINT PEEK 32768 and this returns 117 ...
    POKE 32768,170 : PRINT PEEK 32768 returns 174

    RAM as it will actually boot ...
    kurbeco kurbeco August 2019 Hardware
  • 16k and PEEK 40000 (on a real 16k Spectrum)?Imagine a real 16k Spectrum (without any RAM expansion or circuits fitted). What would I get if I do a PEEK or try to access memory over 32767? Wo…

    ... real 16k Spectrum (without any RAM expansion or circuits fitted). What ... get if I do a PEEK or try to access memory ...
    Zup Zup June 2020 Hardware
  • Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…

    ... programs and even run a RAM diagnostic. Basically, tells me ... all the associated logic, and RAM chips, with no effect. ... direct connections between the upper RAM and associated logic, and ... )

    PRINT PEEK 23732 + 256 * PEEK 23733 returns 32769 when ...
    DistantStar001 DistantStar001 June 2022 Hardware
  • compatibility between ZX computers?Hey all, I'm new here :) I was wondering about compatibility between ZX computers. Is it possible to run a game made for ZX80 on a ZX Spectrum? Or a …

    ... .

    RAM 7 is the alternate screen ... the screen as RAM 7 leaving the memory map as:

    ROM
    RAM 5
    RAM 2
    RAM ... remains the screen, so PEEK 16384 would remain a ... screenadress, as well is PEEK 49152.

    ...
    Dr BEEP Dr BEEP July 2003 Sinclair Miscellaneous
  • Games that cannot be completed due to bugs - the definitive listIt would be nice if the community of WoS compiled a list of all the games that are known to be impossible to complete due to bugs. Perhaps one day, a…

    ... from ROM instead of RAM.

    map data...

    PEEK 33002 " " " " " " " " " right.
    PEEK 33003 " " " " " " " " " up.
    PEEK 33004 " " " " " ...
    Mr. Anonymous Mr. Anonymous March 2005 Games
  • zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…

    ... the memory map you have contains a lower RAM region (16K ... bank, and an upper RAM region (32K) which belongs ...
    If the contended RAM is damaged, the computer hangs ... result with a PRINT PEEK 32768. Is it 0 ... the result again with PRINT PEEK 32768. Is it 255 ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... t like to use the RAM disk (although I have done ... versa.
    - Loading from the RAM disk takes time. If you ... loading new sets from the RAM disk continuously. This will be ... [/url] )

    The game map is comprised of 100 screens ... you want to take a peek)
    na_th_an na_th_an January 2011 Sinclair Basic
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... mean that all 8 upper ram chips are caboosed?[/QUOTE]
    PEEK'd value doesn't match ... single bit failure (1 bad RAM chip) is enough.
    < ... POKE'd, and what is PEEK'd back. For all 256 ... can use the schematic to map that bit(s?) to IC ...
    RetroTechie RetroTechie October 2011 Hardware
  • What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …

    ... do when dealing with paginated RAM? Yes, it has to ... in RAM so I open a window into the file to peek ... I could hold this in RAM, then following the left ... linear address spaces. You can map a file into memory ( ... set is > 48k RAM for anything but the simplest ...
    Alcoholics Anonymous Alcoholics Anonymous May 2012 Sinclair Miscellaneous
<1234567…34>

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