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Search Again :: Adv Search 1000 results in 0.028s
<1234567…34>
  • 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 …

    I have 48K issue 2 board (I've checked, the ... faults with

    bit 2 = IC16 (IC7)
    bit 4 ... /> 174 = 10101110

    bit 2 = IC16 (IC7) (from 166 result ... are only in the upper RAM as it will actually boot ...
    kurbeco kurbeco August 2019 Hardware
  • +2B ram chips?Hi all, I have got 2 Plus2B`s and 1 Plus2 gray case. Ok the one Plus2B don`t work, so I tried to see if I could pin down the problem. I changed the …

    ... />
    There are 4 ram chips on sockets on board ... Plus2B.
    The one ram chip IC6 had a pin ... .
    I then removed 2 ram chips IC6 and IC4 replace ... dwith 2 other ram chips that to be ... />
    If its the ram chips then I shall buy ...
    swift240 swift240 June 2007 Hardware
  • Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …

    ... On the 128 and +2, memory is entirely ... />
    Bits 0-2: RAM page (0-7) to map ... mode, ignored.
    Bit 2: In normal mode, high ... 128k syntax checker
    ROM 2: +3DOS
    ROM 3 ... previous value is stored
    2. OUT #1FFD, (23399) - ...
    bverstee bverstee April 2010 Hardware
  • AGTY: Cambridge Z88 freeHi everyone, I have a Cambridge Z88 I am giving away, if anyone is interested it is listed on anygoodtoyou.com [URL="http://www.anygoodtoyou.com/…

    ... missing the battery cover), manual, 2 RAM carts and Computer Concepts Spellmaster.
    agty agty December 2010 Sales
  • Enable 128kB paging in emulatorFrom Zx Spectrum documentation ([url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]) [CODE][SIZE="1"]When memory is being pag…

    ... follows:

    Bits 0-2: RAM page (0-7) to map ...
    Ralf Ralf June 2013 Emulators
  • Super Wonder Boy Encoding Scheme MisclassificationThe original Activision release of [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0005053"]Super Wonder Boy[/URL] is listed as having an Enco…

    ... 6144, RAM page=16
    -->Sub-block 2 - Start ... =32768, Length= 768, RAM page=16< ... - Start=64895, Length= 2, RAM page=16
    --> ... Start=64947, Length= 4, RAM page=16
    --> ...
    jp jp September 2013 Infoseek database
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ...

    ; b = Bits 0-2: RAM page (0-7) to map ...
    pointblnk pointblnk August 2016 Development
  • 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 …

    ... pages in the 64k addressable RAM - that doesn't need ... case however.

    RAM 7 is the alternate screen ... so you can page RAM 7 into the top ... of the RAM and have the screen ...
    ROM
    RAM 5
    RAM 2
    RAM 7 - Screen

    cyborg cyborg July 2003 Sinclair Miscellaneous
  • 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 …

    ... pages in the 64k addressable RAM - that doesn't need ... case however.

    RAM 7 is the alternate screen ... so you can page RAM 7 into the top ... of the RAM and have the screen ...
    ROM
    RAM 5
    RAM 2
    RAM 7 - Screen

    Dr BEEP Dr BEEP July 2003 Sinclair Miscellaneous
  • 128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…

    ... /> You have two banks of RAM, one contended, the other uncontended ... +2A/+3. On the 128K/+2, RAM pages 1, 3, 5 and ... are contended and pages 0, 2, 4 and 6 are not ...
    Philip Kendall Philip Kendall February 2005 Development
  • 128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…

    ... +2A/+3. On the 128K/+2, RAM pages 1, 3, 5 and ... are contended and pages 0, 2, 4 and 6 are not ...
    cyborg cyborg February 2005 Development
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... a 48K with some dodgy RAM at the top!
    [/quote ... an issue 6a motherboard with 2 RAM banks.)

    So, are ...
    a a July 2005 Sinclair Miscellaneous
  • dK'Tronics 4K Graphics ROMHi, I've got a working 4K graphics ROM fitted (today) in my ZX81 (yay!). I'd like to put a RAM chip (battery-backed) in the socket provided, howeve…

    ... as follows:

    1 2 3
    4 5 6 ... pinouts
    from the 6116 RAM chip, so the information below ... for the links to the RAM chip to go to A1 ...
    hldswrth hldswrth January 2006 Hardware
  • 128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…

    ... /> Bits 0-2 RAM page (0- ... C000h +--------+--------+--------+--------+--------+--------+--------+--------+
    | Bank 2 | Any one of these ... | |
    | | |
    0000h +--------+--------+
    RAM banks 1,3,4,6 ...
    Fikee Fikee February 2006 Development
  • Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…

    ... .uk/Williams-Defender-Arcade-4116-ram-chips-NOS_W0QQitemZ190036399869QQihZ009QQcategoryZ3945QQrdZ1QQssPageNameZWD1VQQcmdZViewItem[/url]
    15 ... for use as upper RAM (or 128/+2 RAM) is a little harder ... - Ebay again.

    4464 RAM for +2a/3 try old ...
    DEATH DEATH November 2006 Hardware
  • 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…

    ... shall ask about battery backed RAM - it appears that there is ... of providing 32K ROM + 32K RAM - would this be enough for ... banks (BASIC & Syntax) and 2 RAM banks (ResiDOS & IDEDOS). However ...
    glancaster glancaster January 2007 Hardware
  • Opus Discovery and +2A?Can anyone tell me if the Opus Discovery is compatible with the +2A. I've just bought a +2A off Ebay and couldn't find any info on compatability. If…

    ... />
    AFAIK interface 1, interface 2, RAM Turbo, all Romantic Robot products ...
    DEATH DEATH February 2007 Hardware
  • I blew up my +3I'm still not sure of what happened (most probably a wrongly inserted interface) but I blew up my +3. What happens when I turn on the power or press …

    ... - ULA ruled out.
    2) RAM - oric RAM was nasty stuff - swapped a ... slightly less blocky.
    3) RAM logic - logic probe showed all ... /> 5) Went back to the RAM and found if I replaced ... /> Problem was a combination of RAM and a dud CPU, but ...
    Womble Womble November 2008 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... of the Z80 and the RAM chips. so far:

    2 RAM chips.

    on the ...
    xc8 xc8 September 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... /CAS (pin 16) of the 2 RAM chips IC5 , IC6
    is ... same pin on the other 2 RAM chips IC3, IC4 is pulsing ...
    xc8 xc8 September 2009 Hardware
  • What Joystick/inteface?Hi, I wonder what the group thinks of the best option for Joystick and inteface is for the 48k Spectrum. I am interested in the Interface 2 but only…

    ... " they made interfaces e.g. ram electronics / protek / datel all made ... /> interface 2 is pretty much the same as the "ram turbo" joystick ... /> the advantage of the interface 2 / ram turbo is that it has ... connector itself are good.. The Ram turbo I have, need to ...
    fog fog January 2010 Hardware
  • Ram joystick interface and Competition ProMy Ram joystick interface does not work probably with a Competiton Pro joystick with autofire (on a ZX 48K). Is this normal? My Competition Pro wit…

    ... interface.. I think I have 2 of them also and one ... haven't got my interface 2 / ram turbo here to say if ...
    fog fog January 2010 Hardware
  • Picked up a hardware haul todayToday i picked up locally 6 rubber key speccys 1 Interface one 2 Vic 20's The speccys are all in a bit of a tired state and need some tlc, most with …

    were they they 6 on ebay? i did see em , but kinda thought they'd be junkers.

    maybe get yaself a diagnostic cart. or atleast a game cart + interface 2/ram turbo.. that'll find out low ram probs.. well first chip
    fog fog December 2010 Hardware
  • AGTY: Cambridge Z88 freeHi everyone, I have a Cambridge Z88 I am giving away, if anyone is interested it is listed on anygoodtoyou.com [URL="http://www.anygoodtoyou.com/…

    ... missing the battery cover), manual, 2 RAM carts and Computer Concepts Spellmaster ...
    zeropolis79 zeropolis79 December 2010 Sales
  • +2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …

    ... /> org $f392
    ;
    set 2, a ; f392 cb d7 $08ts ... functionality - port $7ffd for 128/+2 and port $1ffd for +2A ... :
    ; $7FFD (Out) - Bits 0-2: RAM bank (0-7) to page ... , 0=Using screen.
    ; Bit 2: 1=Print in L-Mode ...
    jp jp January 2011 Games
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    Even if you fix the toastrack/grey +2 RAM contention you've still got all the I/O contention which the +3 based machines don't have, and a dirty bus as well. The toastrack is striking to look at, but horrible to use.
    chev chev April 2011 Hardware
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... you fix the toastrack/grey +2 RAM contention you've still got ...
    BiNMaN BiNMaN April 2011 Hardware
  • Gauging interest: ZX EvolutionHi everyone. First of all I would like to introduce myself, since this is my first post. My name is Conrad, I'm from Vancouver, BC, Canada, and I hav…

    ... wait states);
    * 4 Mb RAM, 512Kb ROM;
    * MicroITX ... 8MB Permedia 2 3D graphics card, ZorRAM 256MB RAM card, IndivisionAGA ... 63 90MHz 68060 accelerator, 512MB RAM, CTPCI PCI busboard, NetUSBee ... port, with a Symbiface 2 RAM/ROM/IDE/PS2 Mouse/RTC ...
    TheRogue TheRogue September 2011 Announcements
  • Joystick interface with port through connector?Which joystick interface has a port through connector? Micky

    On the PCB from Ram Turbo interface stands following:

    Turbo 2 Ram electronics Side 2
    Side 1 PSS8517

    IC one:
    RAM Turbo
    1054
    8528

    IC two:
    DM74LS366AN

    Micky
    -Micky -Micky December 2011 Hardware
  • Spectrum in black TS1500 case with grey "Sinclair ZX Spectrum" labelAt the Spectrum30 event yesterday, someone had brought a Spectrum like object with an unusual case and I never did find out whose it was or where it …

    ... ). He mentions the former has 2 RAM chips while the latter is ...
    Alcoholics Anonymous Alcoholics Anonymous September 2012 Hardware
<1234567…34>

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