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<1…14151617181920…34>
  • 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…

    ... , and 2 type of used ROM chips.

    RAM: 48K ... marked usually as TI/OKI switch.

    Similar is with ... to build in EPROM instead ROM?

    27128: it has ... schematic of similar thing: external ROM:

    [url]http://www ...
    piters piters April 2007 Hardware
  • Problem with my speccy 48+My machine boots up but apon booting it freezes and you can see feint grey horizontal 1 pixel lines going down the screen. Is this fixable at all?

    ... 'supersize' text in the Speccy ROM) and the keyboard doesn't ... keyboard membrane is, is a switch matrix.

    It's ...
    Winston Winston April 2007 Hardware
  • TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…

    ... -5v and +12v side). The ROM is a single supply 5v ... electrolytics in the Speccy's switch mode power supply - it's ...
    Winston Winston May 2007 Hardware
  • InterfaceHi I'm building a spectrum emulator. I've tried to build it as modular as possible, for example I have a zx class that have input and output devices…

    ... in the Spectrum ROM, the paging in circuitry will switch.

    ROM (and RAM?) and assign a ...
    BloodBaz BloodBaz May 2007 Emulators
  • TS2068 Emu CartAlert! alert! Andrew and Bruno may be interested in this if you haven't already seen it. [url]http://cgi.ebay.com/ZX-Spectrum-emulator-cartridge-for-…

    ... a version of the Speccy ROM with the appropriate code at ... (as opposed to having to switch it in with an OUT ...
    jboatno4 jboatno4 June 2007 Sales
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    ... (last chance). Added an RESET switch, put BIG holes in case ... " EVPROM in the place of ROM chip, with some wires modification ...
    Gods Gods June 2007 Hardware
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    ... =Gods;197936]Added an RESET switch, put BIG holes in case ... " EVPROM in the place of ROM chip, with some wires modification ...
    gtsamour gtsamour June 2007 Hardware
  • OT: Commode AmigaYeah don't shoot me....its in chit chat! I won a nice Amiga A500 setup this weekend on Ebay: [url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=0…

    ... 's also could have their ROM upgraded. The terms OS ... (Workbench), and Kickstart (ROM) are often mixed. If you ... a machine with 2.0 ROM's, you can still ... the machine.
    Kickstart-switch, with both 1.3 and ... there)
    SCSI CD-ROM connected to the A 590.
    Pilsener Pilsener July 2007 Chit chat
  • switchable ROM`sHi all, As I own a few Spectrum and Commodore computers, I am wandering a few years ago on the C64 there was a switchable ROM the normal C64 and a Ji…

    ... Sweden. It switches between a Beckman Nordisk ROM (Scandinavian characters plus Swedish ... the original ROM from Sinclair. From what I was told Beckman was ...
    pmsr pmsr August 2007 Sinclair Miscellaneous
  • switchable ROM`sHi all, As I own a few Spectrum and Commodore computers, I am wandering a few years ago on the C64 there was a switchable ROM the normal C64 and a Ji…

    ... switchable ROMs). The mechanism to switch is rather basic, though (an ... the Gosh Wonderful ROM and the normal Speccy ROM can be switched ...
    Winston Winston August 2007 Sinclair Miscellaneous
  • What did Spectrum BASIC lack (and was BBC BASIC so good?)Over the years, I've read in various multi-format magazines, that BBC BASIC was probably the best BASIC available on an 8-bit machine. I've never use…

    ... assembler routine rather than the rom routine that handles 'GOTO' or ... the story line, and then switch to a nice mode for ...
    guesser guesser September 2007 Sinclair Basic
  • Got my mac mini and I'm in loveI have had it for about 2 days now and it is the 2nd best piece of computer equipment i have had, it is quieter then my dvd HD recorder i have been s…

    ... Electronics" note that line powered switch mode power supplies can fail ... was directed to the CD-ROM bay! This is just a ...
    Winston Winston September 2007 Chit chat
  • Wtf??I won this NZ auction earlier this week [url]http://www.trademe.co.nz/Browse/Listing.aspx?id=116509561[/url] and have been to collect the hardware th…

    ... ]the keyboard is just a switch matrix, though. and I can ... that to the 4116/4164/ROM/Z80CPU chips I've had ...
    DEATH DEATH October 2007 Hardware
  • Recent Returnee to the spectrum fold needs hardware adviceHi all. Thanks for taking the time to read this. This is my first post to this forum after I stumbled on this site just a few weeks ago, i only reg…

    ... use of one harddisk, CD-ROM or CF-Card via CF ... NMI menu you can simply switch between disk and tape) Very ...
    beanz beanz October 2007 Hardware
  • A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…

    ... 1. Any hardware with a ROM in it needs to at ... need a jumper or a switch to allow traps to be ...
    Winston Winston October 2007 Hardware
  • A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…

    ... can prevent the IF1 ROM from paging in by holding ... to switch state when I'm paging in my ROM, so ... although I can stop its ROM from being paged in, ... is set, whammo, its ROM gets paged in, possibly with ... However, this makes the ROM programming on my hardware very ...
    Winston Winston October 2007 Hardware
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... variants of the Interface One ROM. Some microdrive software will only ... work with certain versions of ROM. IIRC Spin only emulates the ... second issue of ROM, and I have encountered some ... 5.3 allowed me to switch to the earlier multiface model ...
    Digital Prawn Digital Prawn October 2007 Games
  • splib2 from ROMI'm trying to generate IF2 ROM games for ZX Spectrum 16K using z88dk + splib2. So far I've managed to create a new crt0 file and to generate valid RO…

    ... of the rotation table in ROM, sp_Initialize() will try to ... rotation table values into the ROM image you create.
    ... can go into the ROM. The im2Init function that ... the correct values into the ROM image.

    ... It may be easier to switch to SP1 (it has ...
    Alcoholics Anonymous Alcoholics Anonymous December 2007 Development
  • Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…

    ... speccy.org/trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url] ), ...
    "1. (blue line) Original ROM (16K): Connect track to GND ... yellow line) 27C256 (32K). This ROM can store an original ROMs ... switch on the side Spectrum and so easily accessible both banks ROM ...
    gtsamour gtsamour December 2007 Hardware
  • OpenZXRom v2007-12-31 releasedI've just put out a new release of OpenZXRom, the freely licensed replacement for the Spectrum ROM rewritten from scratch with no Amstrad code: [url…

    ... I've tried using the ROM, with tap files downloaded from ... ROM that will likely be wrong for the openzxrom.

    Switch ...
    Fred Fred January 2008 Development
  • sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …

    ... high). TR7 is used to switch 9V to the speaker to ... H/N jumpers select which ROM type the system has, Hitachi ...
    Phu Phu February 2008 Hardware
  • Spectrum Ethernet update...in which a toastrack 128K machine prods a machine outside of my LAN for the first time. [url]http://spectrum.alioth.net/doc/index.php/Current_eve…

    ... subsequent return to the main ROM, such that it works properly ... in compatibility with other paged rom devices, specifically mass storage.
    switch between the two with a ... on a BBC Micro to switch between two disc interfaces.
    Winston Winston March 2008 Hardware
  • Why are we here? (At WoS)No, not a deep philosophical question about the nature of life, the universe and human existence. The thread &#8220;what does your partner think of …

    ... contrast, had the Complete Spectrum ROM disassembly very early on).[/quote ... have had a reset switch and a power switch (in fact, no ... Speccy had a power switch - I had to buy one ...
    ewgf ewgf March 2008 Sinclair Miscellaneous
  • Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…

    ... +3 it's possible to switch the system into "special" mode ... , and effectively swap the ROM for either memory bank 0 ...
    bobs bobs March 2008 Development
  • Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…

    ... the +3 by attempting to switch to the 4/5/6 ... if the ROM area becomes writable. If so, switch to ROM/5/2 ... /3, copy the ROM to bank ... to banks 5/6/3, switch to 4/5/6/3 ...
    John Elliott John Elliott March 2008 Development
  • fao Winston, Flash romssince you are an expert on flash roms :) do you know how a spectrum +3 can be modified to use flash chips from old motherboard bios chips etc? the r…

    ... presume one could add a switch to change bank and have ... couldn't flash an internal rom because it's using it ...
    piters piters March 2008 Hardware
  • fao Winston, Flash romssince you are an expert on flash roms :) do you know how a spectrum +3 can be modified to use flash chips from old motherboard bios chips etc? the r…

    ... 29ee011 flash rom containing the two 32k images. an external switch could ...
    guesser guesser March 2008 Hardware
  • BASIC Keyword ReferenceHi. I do most of my ZX work on a grey-case +2 which, as we all know, is devoid of most of the 48k BASIC keywords (it has LOAD and stuff, but not much…

    ... use, you could always switch your ROM for an EPROM containing the ... Gosh Wonderful ROM which is designed for maximum ...
    Dr BEEP Dr BEEP March 2008 Sinclair Miscellaneous
<1…14151617181920…34>

Latest Posts

  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
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  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
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HitBox

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beckman 27 41
rom 15.6K 29.7K
switch 7.6K 10K

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