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<1234567…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…

    ... possible to program a ROM Chip with the 48K ROM and fit it as ... would be best to use and which links need to be ... between the IC 27 PCF1306P and IC28 74LS04 chips there are ... links marked IN R Out and below In C Out does ... the pins, I changed the ROM link to H but all ...
    Martin Baugh Martin Baugh April 2007 Hardware
  • 48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…

    ... a 27c256 EPROM containing the 48K ROM and a diagnostic ROM from Paul Farrow over ... wires and....it works. Erase and reburn the 27c256 with stock ROM (previous ... with Geoff Wearmouth's gw03 ROM) and diagnostics and that works too. Create ...
    witchy witchy December 2015 Hardware
  • Wanted: Timex 2068 with 48K rom...and more if possible. I checked all the threads I could find about the TS2068, checked Jarek's website, even sent a few pms and asked a few peopl…

    ...and more if possible.

    ... , even sent a few pms and asked a few people a ... get a TS2068 with a 48K rom, but I would love to ... one to sell, with a 48K rom already instaled, or with all ...
    zxbruno zxbruno January 2007 Wanted
  • 48K's and bad DivIDE compatibilityI have had some 48K boards and complete machines in the past which didn't work fully with a DivIDE interface. The reason for that always was a Z80 pr…

    ... have had some 48K boards and complete machines in ... with spare ones, and the problems were always ... the 48K the DivIDE boots, detects the card and pressing ... a key boots the Spectrum rom.
    48K beep or reset.
    ...
    bverstee bverstee March 2012 Hardware
  • Distribution status for Beckman Innovation AB 48K ROMToday while practicing the black art of WAV to TZX conversion on my copy of the Beckman Innovation AB 48K rom, I wondered who owns the copyright and …

    ... Innovation AB 48K rom, I wondered who owns the copyright and if we ... to, considering the rom has copyright from Sinclair Research (and Amstrad, thereof ... ):

    > Nordisk ROM, (c) Sinclair ...
    pmsr pmsr July 2012 Hardware
  • Which games perform checksums on the 48K ROM?I've just modified a version of the 48K Spectrum ROM designed for use on the Timex Sinclair 2068, so that a 16 bit checksum of the ROM produces the r…

    ... a version of the 48K Spectrum ROM designed for use on ... checksum of the ROM produces the result $641F and an 8 ... same values as the standard 48K ROM.

    Does anyone ... performed these tests on the ROM? I'd like to ... try the new ROM out on these games.
    rga24 rga24 June 2014 Development
  • 48k Spectrum and joystick interface.Hi there, is anybody willing to sell a working ZX Spectrum 48k machine and joystick interface of some kind (I know Kempston-compatible is a must, but…

    ... sell a working ZX Spectrum 48k machine and joystick interface of some ... have a few games already, and a tape recorder. It's ... 't have an actual Speccy, and some of the bundles I ...
    NightSprinter NightSprinter July 2006 Wanted
  • Issues with 48k spectrum and divIDEI heard you can have all kinds of issues with 48k spectrum and certain DivIDE models. Is this true and if so what should I look out for ? Only aski…

    ... all kinds of issues with 48k spectrum and certain DivIDE models.

    Is this true and if so what should I ... am saving up for one and dont want to buy a ...
    morcar morcar June 2014 Hardware
  • eprom with 2 imageswhat's the easiest way to add an eprom with 2 images on with a simple switch not worried about any fancy auto switching or anything just want 48k bas…

    ... or anything just want 48k basic and diagnostic on rom, back in day when ... a14 to centre pin and either side gnd and +v can I ... do same with spectrums and I know I need extra ... wire and bits to make EPROM work ...
    caver99 caver99 March 2016 Hardware
  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…

    ... a CALL to TRDOS/Betadisk-ROM (15619 on TRDOS v5).
    48k ROM?
    Luzie Luzie October 2019 Development
  • 48K ROM copyrights holderHi everyone I would like to check with you about the rights to the 48K ROM. It seems the current rights owner is Sky UK. Did anyone have any recen…

    ... about the rights to the 48K ROM. It seems the current rights ... statement from Sky regarding the rom rights (like Amstrad had ... which would rely on the ROM routines.
    While probably ... using the original ZX Spectrum ROM (48K) would make things easier.
    claudiu_cwg claudiu_cwg October 2020 Sinclair Miscellaneous
  • Harlequin Rev GI have just got all the bits to build an Harlequin Rev G system and I went for a red solder mask board. I have fitted the 3 surface mount components…

    well on first power up with a diagnostic image I got blocks on screen swapped jumper to 48k rom and got coloured blocks and a beep tone and now it won't do nothing damn have to get test meter out and check voltages tomorrow
    caver99 caver99 March 2016 Hardware
  • 48k Speccy died, resistors getting too hot to touchHi folks, With 2 days to go till an exhibition my trusty dual-boot 48K issue 3b that I made last year has given up the ghost and I'm not sure I ha…

    ... not being drawn properly and that the diagnostic (Paul Farrow's) is ... border colour. Start the normal 48K ROM and I can just see what ...
    witchy witchy June 2016 Hardware
  • Z80 core testing ?OK, my z80 core is almost finished (apart from RRD, RLD, and block instructions except LDI,LDIR,LDD,LDDR). I run the 48K rom and hurray, it resets co…

    ... ,LDD,LDDR). I run the 48K rom and hurray, it resets correctly. I ... emulate a keypress and.... it crashes !!!

    This ... the result of imperfect emulation (and it's not the cause ... warn me if they appeared, and they don't). I've ...
    GOC GOC July 2004 Development
  • Games that won't work with the +2a/bIs there a list of all the games that don't work with the +2a/b? Like Fairlight for example. Ta :)

    ... />
    Is it really mostly ROM changes that cause the problems ... that depends massively on timing and interrupt tricks.

    If ... it's mainly the ROM, has anybody tried to plug ... that also contains the original 48K ROM and can be activated by an ...
    J?rg Pleumann J?rg Pleumann November 2004 Games
  • Public Domain speccy games?Maybe I've missed somewhere obvious, but is there a list of Spectrum games that are in the public domain? I've just added a speccy emulator as a dow…

    ... ]

    Well, yes. The 48K ROM and the 128K ROMs are obviously ... aiming your site at newbies and trying not to confuse people ... and you actually meant "tape images" ...
    Philip Kendall Philip Kendall May 2005 Games
  • 128K ROM 0 Disassembly updatedSome updates to my 128K ROM 0 Disassembly at [url="http://www.mjwilson.demon.co.uk/rom/"]http://www.mjwilson.demon.co.uk/rom/[/url] Thanks to Rui Tu…

    ... documentation of the PLAY command, and the RAM Disk commands. BASin ... using ROM traps in the 48k ROM, and send emulation to a temporary "rom-like ...
    Dunny Dunny May 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 …

    ... Zip file which contains a ROM (and the assembler listing, zasm-compatible ... first burnt your test rom. Spectrum initialized and screen looked just like ... hint I burnt next ordinary 48k rom and initialized +2 with it. It ...
    Timppa Timppa September 2005 Sinclair Miscellaneous
  • divIDE issuesI discovered a few issues with the divIDE hardware and FATware software that may be of interest to some people. 1. ROM paging If your Spectrum is a…

    Hello.

    Such things like paging inhibition must be done internally in all the non-standard machines. I suppose that in the area #0000h-#3fffh is always the vanilla 48k ROM (and for 128k / +3 clones the firmware outs #1ffdh
    zilog zilog October 2005 Development
  • WarningWarning Some games such as "Cyclone" WILL NOT run on a +2A. I have tried numerous times, and every time the load fucks up resulting in a 48K BASIC …

    ... 2 to utilise custom keyboard and joystick routines.

    ... debugger then IM2 is shown and the I register is $ ... this location in the 48K ROM and Sinclair 128 and Amstrad +2(grey case ... $3AFF/$3B00 and so Amstrad just left unused ROM locations holding zero ...
    Geoff Geoff November 2005 Games
  • BASin and the 128k commandsI've decided to look at incorporating the 128k commands PLAY and LOAD!, SAVE!, MERGE!, VERIFY! for the ramdisk. It won't be full 128k emulation. No …

    ... . Use the ZX Spectrum SE ROM set. On a real machine ... do a LIST command PLAY and SPECTRUM will show up as ... BASin. The SE ROM is the original 48K ROM and a modified version of ... original machines as I can, and ROM switching isn't going to ...
    Dunny Dunny November 2005 Sinclair Basic
  • The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…

    ... internal ROM. This was used for the IF2 cartridge thingy and by ... Sinclair didn't write the 48k ROM and were on bad terms with ... and menu the 128 actually got. So I think the 48k's ROM ... ), standard disk interface and a total rewrite of the ROM.

    Alcoholics Anonymous Alcoholics Anonymous October 2006 Sinclair Miscellaneous
  • The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…

    ... internal ROM. This was used for the IF2 cartridge thingy and by ... Sinclair didn't write the 48k ROM and were on bad terms with ... and menu the 128 actually got. So I think the 48k's ROM ... ), standard disk interface and a total rewrite of the ROM.[/quote]
    JamesD JamesD October 2006 Sinclair Miscellaneous
  • a dumb question?Well, I have been confused with all these interfaces so I have the following question which will make things clear for me... ;) Is there a "device" …

    ... -$3fff, replacing the Spectrum ROM. You can indeed install several ... INSTALL" command does. The "%ROM" command allows you to restart ... ROM) you desire.

    So, you can install and ... can install the original 48K ROM and gain compatibility with those odd ...
    glancaster glancaster January 2007 Hardware
  • 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…

    ... possible to program a ROM Chip with the 48K ROM and fit it as ... Microhobby magazine about changing Spectrum ROM with an EPROM.
    ... a jumper to select between ROM and EPROM. I simply lifted one ... don't contact the socket ) and soldered it to the appropriate ...
    Marcelo Marcelo April 2007 Hardware
  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... in issue 6 48K machines, 128K+ and the grey +2 ... One with a regular 48k rom and another with a memory ... br /> I installed the 48k eprom on a speccy following ... /trastero/cosas/JL/ROM-EPROM/ROM-EPROM.html[/url ... , no cables whatsoever.... and the eprom chip can ...
    gtsamour gtsamour November 2007 Hardware
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    Right fitted the board (doddle) and soldered a switch

    rom on the tap creator, ... ?

    the rom is 32k but the tap ... bit and I have to flash the original 48k rom as ... that bank 2 needs the 48k rom and bank 3 the 128k? ...
    BiNMaN BiNMaN September 2010 Hardware
  • Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …

    ... 128k bit and I have to flash the original 48k rom as well ... that bank 2 needs the 48k rom and bank 3 the 128k? or ... 's ram and then flash them all to the flash rom.
    and the original spectrum rom for compatability. All with ...
    guesser guesser September 2010 Hardware
  • 128kefrom the scratchpad for the 128ke "Finally, reading from a non-existing port (eg 0xff) will give the screen/attribute bytes as it does on the 48K/12…

    ... /3 even in 48k mode, or with the 128ke rom set sort ... menu it switches to the 48k rom and locks all the paging until ... .

    what rom are you using, and what games are having ...
    guesser guesser September 2010 Hardware
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    Just tried this and it does not work - well ... in ZXSpin with a standard 48K ROM and get the same error:
    Paddy Coleman Paddy Coleman October 2010 Sinclair Basic
<1234567…34>

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