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<1…28293031323334>
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... accuracy is not enough for EPROM testing.[/QUOTE]

    Which ... can tell us what kind EPROM fade you're attempting to ...
    Philip Kendall Philip Kendall February 2013 Development
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... can tell us what kind EPROM fade you're attempting to ... idea about how data of EPROM become damaged with age. I ... neither searched literature about worn EPROM.
    TK90XFan TK90XFan February 2013 Development
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... have a question about the eprom AM29F010. I'm sure some ...
    Severino Severino February 2013 Hardware
  • Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…

    ... clones. Thus I guess its EPROM has not lost its data ...
    TK90XFan TK90XFan February 2013 Development
  • maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …

    ... roughly how my self made eprom reader/programmer works.
    I ...
    Knik Knik February 2013 Hardware
  • poor mans multiface ?just saw this on ebay ... [url]http://www.ebay.co.uk/itm/zx-spectrum-interface-tape-backup-/200898150338[/url] not sure what it's based on ?

    ... autom?tico" (it has no EPROM) or a "Transtape" (it has ... that does not cover the EPROM window?
    Zup Zup February 2013 Hardware
  • Cheap electronic kits for hobbyists/Students etcAs prices start to get silly on ebay for electronic components like CPUs, Memory etc, I've sourced two suppliers from China that do me great deals. …

    ... these cheaper still.

    EPROM / EEPROM? Just be done with ... ; use a dirt cheap Flash EPROM instead.

    The only ...
    RetroTechie RetroTechie February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... to avoid damage to the EPROM from any camera flash, though ... I guess make sure the EPROM's window is safely covered ...
    zub zub February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... to avoid damage to the EPROM from any camera flash, though ... I guess make sure the EPROM's window is safely covered ... tape is good at protecting EPROM's from light :-)

    1024MAK 1024MAK February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... used is a 2764 CMOS EPROM of 65536 bit cells organised ...
    zub zub February 2013 Hardware
  • Spectrum 48k clonesI saw this website today and numerous 48k Spectrum clones. [url]http://zxspectrum48.i-demo.pl/clones.html[/url] A couple of them are really beautifu…

    ... Texas Instruments ULA chip, an EPROM containing the OS, a slightly ...
    Alessandro Grussu Alessandro Grussu February 2013 Sinclair Miscellaneous
  • Sam CoupeI am very interested in the Sam Coupe but I wanted to ask a lot of questions about it. Do anyone here use one a lot and are there any Sam Coupe foru…

    ... allram mode), but I use EPROM chip with modified ZX48 rom ... 16kB rom page from 32kB eprom chip
    16384-32767 = ram1 ... /> In second 16kB page of eprom I have PROMETHEUS assembler (possible ... basic)
    ZX rom (in eprom chip) run always at 6 ...
    velesoft velesoft March 2013 Sinclair Miscellaneous
  • Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …

    If the ROM(s) in your Speecy are in sockets (bases), it is also possible to program a EPROM or a EEPROM chip with the RAM test software. Then remove the Speccy ROM(s) and plug in the test EPROM / EEPROM chip.

    [B][I]Mark[/I][/B]
    1024MAK 1024MAK March 2013 Hardware
  • Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …

    ... also possible to program a EPROM or a EEPROM chip with ... ) and plug in the test EPROM / EEPROM chip.

    [B ...
    xaris_sm xaris_sm March 2013 Hardware
  • Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …

    ... or "burn") an EPROM, you need a EPROM programmer. The same ... someone can program a EPROM chip and send it ... br />
    A suitable EPROM is a 27C256. The ROM ... to be programmed in the EPROM twice, once at offset ... 8k long, but the EPROM is a 32k byte device ...
    1024MAK 1024MAK March 2013 Hardware
  • Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …

    ... or "burn") an EPROM, you need a EPROM programmer. The same ... someone can program a EPROM chip and send it ... br />
    A suitable EPROM is a 27C256. The ROM ... to be programmed in the EPROM twice, once at offset ... 8k long, but the EPROM is a 32k byte device ...
    xaris_sm xaris_sm March 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... , etc. I ordered a gal/eprom burner and I'm waiting ...
    Severino Severino March 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... , etc. I ordered a gal/eprom burner and I'm waiting ...
    zub zub March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    Don?t forget to included the O.S. file of the ROM, (maybe an EPROM).
    flopping flopping March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... pictures, PCB layout, circuit diagram, EPROM files, etc?

    Pierre
    Pierre Pierre March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... URL]

    EPROM Binary File for ULA ROM ... rockygush/Rocky Gush ULA EPROM.BIN"]http://www.del ... Gush ULA EPROM.BIN[/URL]

    EPROM Binary File ... rockygush/Rocky Gush DOS EPROM.BIN"]http://www.del ... .za/rockygush/Rocky Gush DOS EPROM.BIN[/URL]

    Pierre Pierre March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... the 2764 (the 64 KiB EPROM, i.e. 'DOS' ROM)... but ...
    zub zub March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... drive DOS, and the ULA EPROM is used to switch the ...
    Pierre Pierre March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... drive DOS, and the ULA EPROM is used to switch the ...
    zub zub March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... the same problems with the EPROM's, where the 27C128 and ...
    Pierre Pierre March 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... to use a 16 KiB EPROM and leave half of it ...
    zub zub March 2013 Hardware
  • Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…

    ... 's into memory, so the EPROM for it needs to be ... you know someone with a EPROM programmer that you can borrow ... you buy or make a EPROM programmer, you can read the ...
    1024MAK 1024MAK March 2013 Hardware
  • Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…

    ... 's into memory, so the EPROM for it needs to be ... you know someone with a EPROM programmer that you can borrow ... you buy or make a EPROM programmer, you can read the ... /> can i load to the eprom the ram test bin and ...
    xaris_sm xaris_sm March 2013 Hardware
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    ... . I plan on getting an EPROM burner (a few other projects ... while on the subject of EPROM burners, I found this one ... .com/itm/PCB5-0E-Universal-EPROM-EEPROM-Programmer-PIC-flash-BIOS ... to support the type of EPROM for the +3 as well ...
    thomas3120 thomas3120 March 2013 Hardware
  • Setting up an IDE HDD on the +3e helpHello, Just installed a HDD in my +3e (ROM ver. 1.11). When turning on it takes a few seconds longer but then shows 2 IDE (available) as well as 1 fl…

    ... looking around for a decent EPROM burner. I'd like to ... with the whole process of EPROM programming and have a few ...
    thomas3120 thomas3120 March 2013 Hardware
<1…28293031323334>

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