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<1234567…34>
  • edge connector... breadboard / external romso i purchased a breadboard on a edge connector.. to experiment with .. my first task to make a external rom boot (32k eeprom) so i think i got every…

    ... first task to make a external rom boot (32k eeprom) so ... to romcs to disable onboard rom : using a 74hc32n as ... rd to pin 20 of rom (to make sure they are ... a bank selector (the rom file was burn on both ... of the actual rom (which was a diagnostic rom).. so my ...
    mark8bit mark8bit October 2020 Hardware
  • DIVIDE versus ZX128 ROMDivide interface use hardware mapping of extra memory on this fixed points in 48rom: #0000 - power-on/reset/rst0/software restart #0008 - syntax erro…

    ... systems often connect only 48rom(rom 1) after each reset/power ... routines on mapping points in external rom memory. Also exist next big ... Divide in same time connect external memory with system.
    < ... in ROM0, then this ZX128 rom can be compatible with Divide ...
    velesoft velesoft February 2013 Development
  • External Rom entry pointHi, this is my first post - so hi. I am writing a rom for the 128k, an just wanted to check a few things. To launch the rom, the entry point is 0x0…

    ... />
    I am writing a rom for the 128k, an just ... .

    To launch the rom, the entry point is 0x0000 ... ?

    The rom is activated by pulling the ... rom pin high or low on ...
    exit0 exit0 March 2013 Hardware
  • External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…

    ... z80 CPU, and a Spectrum ROM on it (maybe another chip ... the spectrum to use the external ROM and/or CPU instead of ... the Z80 was switched. The ROM seems straightforward, but I'm ...
    Graham Graham August 2015 Hardware
  • ZX Spin 0.3 ReleasedStandard Cut'n'Paste from CSS post again! I can't get to my webpage, so I've uploaded SPIN0.3 to WOS, Alt.Binaries.Comp.Sinclair, and also Daren Pea…

    ... window.
    Added Support for external ROM files - install them to the ... )
    Added TZX/TAP saves (ROM trap method).
    Added Fuller ...
    Dunny Dunny September 2002 Emulators
  • [NEW]: Spectaculator 4.0Hi everyone, Finally managed to finish it... enjoy! --- [NEW]: Spectaculator 4.0 Spectaculator is a Sinclair ZX Spectrum emulator for PCs runnin…

    ... on Sinclair
    Interface II ROM cartridges.

    o Load ... Implemented the ability to use external ROM files. You can now use ... Load programs and data from external audio sources such as Minidisc ...
    Jon Needle Jon Needle January 2003 Emulators
  • SimCoupe 1.0 released[size=-2](for those of you that don't read CSS)[/size] SimCoupe, the SAM Coup? emulator, has been updated to version 1.0. This major release adds ma…

    ... support for ZX82 and gzipped external ROM images
    - Added ... undocumented flags
    - Fixed ROM memory accesses to be uncontended ... of Eshan
    - Fixed external memory ports to be write ... to no longer require temporary ROM patching
    - Improved ...
    obo obo July 2006 Emulators
  • It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …

    ...
    It's a ROM and diagnostics board to try ... and also a general purpose external ROM board. Featuring a 128K ... to 512K flash ROM (which the Spectrum can ... either the Spectrum's ROM or the flash on ... so that the test ROM program can display indications ...
    Winston Winston April 2007 Hardware
  • Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…

    ... is FDD interface with own external rom memory 16kB, based on ... from adress #3D2F of external rom.
    - memory can ... and connect from adress #66 external rom memory.
    - From ... - original BETA128 interface disconnect external rom also if any instruction in ...
    velesoft velesoft August 2013 Hardware
  • 1st interface in 30 yearsHi all, The last time I built a ZX Spectrum interface was 30 years ago, so today I gave it a whirl with an external rom. Switchable in/out of course…

    ... it a whirl with an external rom. Switchable in/out of course ...
    IanJ IanJ August 2014 Hardware
  • New MEMFACE projectMEMFACE is my old project, but never finished. Now is PCB done (at the post office) and I write firmware for CPLD. MEMFACE is interface with external…

    ... connect own external ZX48/128/+3 rom (may be +3e rom)
    ... 3 allram mode)
    - external rom can full replace internal zx ... rom and enable connection of next external interfaces ... ...)
    - can disable external memory on next connected devices ...
    velesoft velesoft November 2014 Hardware
  • boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…

    ... issue 3B .. work done : removed rom, upper ram & logic put ... i boot from a different external rom ie zx diagnostics, or ,paul ...
    mark8bit mark8bit August 2021 Hardware
  • Spectrum emulator tests on WEB?I searched little with google, but didn't find it. Can I get some URL?

    ... emulator which accepts just any ROM you plug in on the ... almost all emulators emulate well external ROM's. But you can connect ...
    piters piters August 2005 Emulators
  • unreleased spectrum protection system - any use any more? also pokerama sourceDon't know if anyone's interested in this. During my days hacking games for Your Sinclair and Crash (and Sinclair User for a while) I had a pet proje…

    ... monitor/debugger/disassembler/tracer... No external ROM. Did I forget something?
    piters piters October 2005 Development
  • Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…

    ... /> I remember reading something about external ROM (such as interface 1, Currah ... line low making the embedded ROM inactive. The same should (theoretically ...
    BloodBaz BloodBaz November 2006 Sinclair Miscellaneous
  • 16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.

    ... to have an external ROM and a modified BASIC ROM available at the ... />
    I'll download the ROM at the weekend, disassemble it ...
    chop983 chop983 March 2007 Emulators
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... )

    Memory - replace the ROM with a modern CMOS Flash ... off (an FPGA requires an external ROM and has to reload its ... mount packages for RAM and ROM. These are still solderable at ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... (which doesn't need an external serial EPROM) or failing that ... also doesn't need any external ROM).

    Actually, an Atmega ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…

    ... />
    I've built an external ROM board to do just this ... code) - the idea behind the ROM board is to run a ...
    Winston Winston April 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…

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

    RAM: 48K ... to build in EPROM instead ROM?

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

    [url]http://www ...
    piters piters April 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…

    General ROM paging is all done in ... chip in a Spectrum (both ROM and RAM) has what are ... , this will either be the ROM chip (for addresses < 16384 ... />
    Concentrating purely on the ROM, when the Spectrum reads from ...
    Winston Winston May 2007 Emulators
  • 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…

    ... I was thinking of a ROM that has got more commands ... .
    Or how about an external ROM that can be plugged into ... to use.
    But a ROM that can be used in ... into a Spectrum ROM surely?
    A custom ROM that can do ... +3e is a very good ROM, but you see what I ...
    swift240 swift240 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…

    ... I was thinking of a ROM that has got more ... br /> Or how about an external ROM that can be plugged into ... use.
    But a ROM that can be used in ... into a Spectrum ROM surely?
    A custom ROM that can ... at Geoff's Gosh Wonderful ROM and of course, Philip ...
    DEATH DEATH 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…

    ... This machine has a similar ROM/RAM split to the BBC ... , lower 32K is ROM - 0x0000-0x3FFF is always page ... 0 of the system ROM, 0x4000-0x7FFF is a ... sideways ROM pageable area (where 16K ... can be paged, or an external ROM or RAM board can be ...
    Winston Winston September 2007 Sinclair Basic
  • Testing the Ram on a Toastrack 128KHi All My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the background scr…

    There's a test ROM for the 128K Speccy that's for testing memory. You'll need an eprom programmer or external ROM board though, to use it (such as my diags board). If you're in Oxford on Saturday, well, I'll have it with me :-)
    Winston Winston October 2007 Hardware
  • Testing the Ram on a Toastrack 128KHi All My "new" 128K is misbehaving, all the demos I have loaded for it crash instantly, Ghostbusters 128K is playable but one of the background scr…

    ... ]There's a test ROM for the 128K Speccy ... need an eprom programmer or external ROM board though, to use ... .
    Is there a ROM file (not loadable file via ... i can flash in a rom chip (27CXXX) so whenever ... is just replace the original rom chip of the machine ...
    gtsamour gtsamour October 2007 Hardware
  • Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…

    ... invoke the program in the external ROM by:

    OUT 31 ...
    georgedb georgedb November 2007 Hardware
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... be able to change the ROM addresses that are checked, or ... you connect any interface with external rom/sram memory, must be after ... /power-on detect timex 2068 rom and patched system(or used ... clones use also modified ZX48 rom, but enterpoints to tape routines ...
    velesoft velesoft January 2009 Hardware
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... you connect any interface with external rom/sram memory, must be after ... /power-on detect timex 2068 rom and patched system(or used ... extra version of rom type for TIMEX 2068 ). All ... clones use also modified ZX48 rom, but enterpoints to tape routines ...
    roko roko January 2009 Hardware
  • Is the original divIDE compatible with Interface 1Is the original divIDE hardware compatible with Interface 1 ? I would like to use the divIDE and Microdrives connected at the same time. Is this pos…

    ... ? After RST 8 connect IF1 external eprom 8kB in area 0 ... port ?

    Divide connect external rom memory if CPU go to ...
    velesoft velesoft January 2009 Hardware
<1234567…34>

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Related Threads

  • External Rom entry pointHi, this is my first post - so hi.<br /> <br /> I am writing a rom for the 128k, an just wanted to check a few things.<br /> <br /> To launch the rom…
  • Searching for correct Betadisk 48k TR-DOS v4.12 ROM (Save ROM via TRDOS-Prompt to Disk)Hi,<br /> <br /> I have two ROM-Files which should be read out from an original Betadisk 48 Interface TRDOS v4.12 (ROM-Size 8k).<br /> But when I …
  • 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<br /> <br /> I found the following code:<br /> [code]<br /> CHADD equ 23645 ; Location of…
  • edge connector... breadboard / external romso i purchased a breadboard on a edge connector.. to experiment with .. my first task to make a external rom boot (32k eeprom) so i think i got every…
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