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Search Again :: Adv Search 1000 results in 0.016s
<1…23242526272829…34>
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    ... potential RAM error then it would be a good idea to check ... loaded correctly, so after loading check the code with:
    LET ...
    Battle Bunny Battle Bunny January 2013 Hardware
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    The two routines combined will check all the pages, as ... version. They include this ULA check from the +3 self- ... page
    cp (hl) ; check correct number
    jp nz ... Jumping to NOTOK1 would give ""RAM fail: address 0000, page x ...
    Battle Bunny Battle Bunny January 2013 Hardware
  • Faulty French +2 grayA friend of mine has a faulty french +2 grey model. The picture its giving out is this... [URL=http://imageshack.us/photo/my-images/19/post2036357600…

    ... things

    I would check the voltages +12, +5 and ... with the lower-half of ram. if not then one ore ... to replace some of the RAM chips.

    I would ...
    Zetr0 Zetr0 January 2013 Hardware
  • Adding TAP file contents to a Spectrum +3e DOS PartitionHello my fellow WoS'ers, This thread is a companion to a great little guide from a fellow AmiBayer [B]mnjnurney[/B] you can view his thread by [URL…

    ... the start, sets DOS & RAM caches to zero; while loading ... motor and the motor timeout check. I tried various locations for ...
    Battle Bunny Battle Bunny February 2013 Games
  • Jim Bagley's ZX81 Racing game released.[url=http://tinyurl.com/JimBagleySpeccy]This guy[/url] has just released a 16K ZX81 game which uses the WRX high resolution schema :-) Download it n…

    ... only works with SRAM (static RAM), but the original 16K memory ... the ZX81 was DRAM (dynamic RAM) since it was cheaper.
    check all games before releasing them ...
    Dr BEEP Dr BEEP February 2013 Sinclair Miscellaneous
  • Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…

    ... ... sorta. It seems to work. Check [url=http://www.mojontwins.com ... to $C000, and page back RAM 0.

    REUBICA is ... to $8000, poke your destination RAM page to 25000, RANDOMIZE USR ...
    na_th_an na_th_an February 2013 New game ideas
  • Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…

    ... 're using the extended RAM on a 128k model ... br /> push hl
    call CHECK

    NEXT: pop ... jr nz,LOOP
    call CHECK
    ld a,(BORDCR)
    ret

    CHECK: ld bc,(VALAT)
    ld ...
    Battle Bunny Battle Bunny 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…

    ... to access the video ram and the Z80 to ... access the upper ram without collision. But when ... doesn't need the video ram, the Z80 has unhindered ... is coupled to the video ram through resistors, in this ... In this way, games can check where the electron beam is ...
    csmith csmith February 2013 Hardware
  • Disabling the +3 disk buffer; yes, but how?I would like to disable the +3 disk buffer in order to retrieve those 4K from the machine's RAMdisk. By reading the computer manual and some posts on…

    ... +3DOS ROM uses Page7 of RAM or not, so to be ... H,0 ; first buffer for RAM Disc
    LD L,128 ... ; number of buffers for RAM Disc
    CALL $013F ; here ... forget it, you should probably check for errors on exit from ...
    The_Bert The_Bert February 2013 Sinclair Basic
  • 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…

    ... of rom and 8K of ram, so (I guess) the 16K ... dump is both rom and ram, only 8K of rom and ... only 8k of ram, so one half of the ... has to be the rom, check the complete disciple dissasembly, I ... microcontroller to replace rom and ram and maybe the pals, It ...
    Severino Severino February 2013 Hardware
  • Spectrum 128 +2 greyhi all, nice to be here, i am trying to reborn my spectrum and i need some help please, i get a new 79s05 to replace, also a bc307 to replace the…

    ... ?

    should i check the ram chips next? is any way ...
    xaris_sm xaris_sm February 2013 Hardware
  • +2 fried using the datacorder(Hi, first post here.) I just got hold of an extremely battered and bruised +2 sold to me for spare parts. As usual I plug it in, hook it up to the …

    ... the ULA and ROM to check they're working. If they ... get hold of some 4164 Ram chips once I work out ... way of checking the 4164 RAM without desoldering from the mainboard ...
    actel actel 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…

    ... (and a magnifying glass) could check the top layer against a ... bug on the schematics, the RAM, a toshiba 5565 and the ...
    Severino Severino March 2013 Hardware
  • New ZX81 1k hires game: PinballI just finished my 1K hires pinball game for the (unexpanded) 1K ZX81. Also some earlier released 1K hires games this year available [URL="http://ww…

    ... !! (As usual).
    Have to check again at home, as I ... work on a >16K RAM ZX81.
    This is fixed ... on a ZX81 >16K RAM.
    CAUSE: opcodes with more ... where on a ZX81 with RAM this made you drop through ...
    Dr BEEP Dr BEEP 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 …

    ... my spectrum, i remove all ram chips and i have some ... have remove all ram chips, i want to check if CPU is ...
    velesoft velesoft 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 …

    ... a EEPROM chip with the RAM test software. Then remove the ... 48k issue 2, can i check somehow any other chips? rom ... is the screen with all ram chips on board and the ... screen when i remove all ram chips and put the NEC ...
    xaris_sm xaris_sm March 2013 Hardware
  • ZX8401 / PCF1306P / Amstrad 40058 for 48K and 128KZX8401 = PCF1306P = Amstrad 40058, let's get started with that. These chips are used as surrogates. Most of us might think those chips were only use…

    ... is for upper memory adressing, check out the [URL="ftp://ftp ... thought that because of the ram paging at the 128K, the ... ' of the 4164/4532 upper ram chips, so Sinclair could buy ... ;)
    "Now that all upper ram chips we order fully work ...
    bverstee bverstee 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 …

    ... remain the same with all ram chips on

    [url ... on service manual advice to check ROM,

    i have ...
    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 …

    ... up/reset, before accessing any RAM. I would imagine the 128 ... .[/QUOTE]

    can i check the solders status on the ...
    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 …

    ... /reset, before accessing any RAM. I would imagine the ... [QUOTE=xaris_sm;688220]can i check the solders status on the ... of the system (like the RAM or ROM chips).
    ... 0 to 200 ohms) to check that each data line from ... step is to check pin 2 on each RAM chip is ...
    1024MAK 1024MAK March 2013 Hardware
  • Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…

    ... had moved since the last check. You needed that for an ... used different variables in ZX ram. Driver calculare relative values, add ...
    velesoft velesoft March 2013 Hardware
  • Spectrum 128k +2 grey RAMhi all, the manual say that ram ic's should be KM4164B-15P but when i open my spectrum (not repaired by anyone) the ram chips was KM4164B-12 is thi…

    ... />
    the manual say that ram ic's should be KM4164B ... (not repaired by anyone) the ram chips was KM4164B-12
    check this?
    xaris_sm xaris_sm March 2013 Hardware
  • RoguelikeI made a 1 bit tile set for a roguelike game, and then I made a Spectrum mockup. My colour choices are terrible, but if you want to code a roguelike…

    ... , small

    cat, cat, ram, goat, deer, bull, cow, sheep ... stairs, walls with different brightness (check mockup), traps, stairs, columns and ...
    Trihook Trihook March 2013 New game ideas
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... i can identify the faulty RAM ic?[/QUOTE]

    RAM chips are concerned, each RAM chip (of ... .

    The RAM test program gives a red ... 5 on each) WHEN these RAM chips are fitted.
    ... PCB track (trace), so check and test for open circuit ...
    1024MAK 1024MAK March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... address line 0 for the RAM.

    It is ... If it is a fault RAM chip, it is not possible ... is effectively routed to all RAM chips. If it is a ... ,

    i will check all the connections you mention ... same pinout with the original ram ic's KM4164B-12, ...
    xaris_sm xaris_sm March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... Mark,

    i will check all the connections you mention ... also buy today some new ram ic's ΜΝ4164P-12 they ... same pinout with the original ram ic's KM4164B-12, i ... account of you only having RAM chips fitted for "ic's ...
    1024MAK 1024MAK March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... account of you only having RAM chips fitted for "ic's ... will need more things to check if i put all ic ...
    xaris_sm xaris_sm March 2013 Hardware
  • +2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…

    ... : "64K x 1 Bit Dynamic RAM with Page mode". "The KM4164B ... /> ok Mark thanks i will check it again,

    is ... straightway answer where the contended RAM IC's are psysical located ...
    xaris_sm xaris_sm March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... as the RAM chips are concerned, each RAM chip (of ... br />
    The RAM test program gives a red ... on each) WHEN these RAM chips are fitted.
    ... PCB track (trace), so check and test for open ... br /> check and re-check all the connections/lines from all ram ic ...
    xaris_sm xaris_sm March 2013 Hardware
<1…23242526272829…34>

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