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Search Again :: Adv Search 1000 results in 0.103s
<1234567…34>
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    ... by one to identify any bad ones that sneaked in there ... test rom, never changes from Bad address Line 0 from 8000 to FFFF. Something ...
    Macc Macc August 2012 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    [QUOTE=Macc;646720]... Bad address Line 0 from 8000 to FFFF...[/QUOTE ... know what it means by 'bad address line 0'. If it's going to ... (at the CPU) between each address line and system 5V and 0V ... check for continuity between each address line at the CPU and the ...
    Zorn Zorn August 2012 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    ... RAM test is still reporting bad address line 0 too, im missing something obvious ...
    Macc Macc August 2012 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 not ram, pages, data line and data adrress,ram banks ... with one stripe that means BAD address line 0

    this is the ... on the ram ics? or address line inside the ram ic?
    address line 0)
    xaris_sm xaris_sm March 2013 Hardware
  • Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…

    All black paper isn't the most common symptom of faulty lower RAM, but it can happen.

    I could probably have a very good guess at what is wrong if I knew what 'bad address line 0' means and what test was used to determine that.
    Zorn Zorn August 2013 Hardware
  • Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…

    ... up the screen and reports bad address line 0 on 8000-3fff and the ...
    Macc Macc August 2013 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    ... tester ROM, keeps throwing up bad data address line 0, which would point to ...
    Macc Macc August 2012 Hardware
  • changing line 0 for editinghiya, just a quickie whats the poke to change line 0 so it can be edited? also whats the poke to change it back? cheers

    hiya, just a quickie
    whats the poke to change line 0 so it can be edited?
    also whats the poke to change it back?

    cheers
    djgarf djgarf August 2011 Sinclair Basic
  • Bad Reset Line on +3eHello there my fellow WoS'ers, Alas I have not been about much over the last couple of weeks, got hit by the flu, headcold and a rather nasty throa…

    ... +3 with a Bad Reset line - Its that bad even the reset button ...
    Zetr0 Zetr0 April 2012 Hardware
  • Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…

    ... most likely to be a bad data line. It's unlikely to ... continuity from the appropriate data line off the Z80, to the ... 's unlikely to be a bad address line, since then all the chips ...
    Winston Winston November 2008 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…

    ... have an error on 0 data line or address line ,what is the ... it thinks there is an address line problem...

    If ... ("DMA0" & "MA0") act as address line 0 for the RAM.

    address line "A0" is effectively routed ...
    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…

    ... possible) to be the "A0" line between the Z80 CPU (IC9 ... each).

    Or between line "DMA0" between IC10 pin 4 ... ("MA0" & "DMA0") act as address line 0 for the RAM.

    address line "A0" is effectively routed to ...
    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…

    ... it thinks there is an address line problem...

    ... " & "MA0") act as address line 0 for the RAM.

    address line "A0" is effectively routed ... multiplexer switching the correct address information from the CPU ...
    xaris_sm xaris_sm March 2013 Hardware
  • Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…

    ... 'bad address line' and 'bad data line' errors and you said a bad address line was ... a Spectrum. If an address line were truly not working, ... not access the expected address. Can anyone give some ... reports a bad address line?

    The address ranges given ...
    Zorn Zorn August 2013 Hardware
  • Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??

    ... its z80 can only address 64KB at a time ... with 16 address pins. 2^16=65536 ... . Dec. 0 to 65535, your 64KB. ... Spectrum has not a bad graphic if you compare ... 't think it has bad graphics compared to a ... at start of line 1 to end of line 0

    Sadako Sadako March 2004 Sinclair Miscellaneous
  • what is this crazy modfound a speccy in my loft yesterday,and it seems to have an external heatsink modd i havent the foggiest about speccys heres a few pics [url]http://i…

    ... fault though, if its a bad address at line 0, according to fruitcakes site ...
    Macc Macc January 2012 Hardware
  • 48k Stops loading and resetsI've just fixed the problem I had with my Issue 2 Spectrum only showing 16k memory by replacing all of the upper ram. With that job done I've done a …

    ... way to diagnose an address line error like this (without ... Then change one number from 0 (as it is on start ... br /> Move down a line to make the Multiface refresh ... to the bit that's bad.

    For example ... tells you that D3 is bad.

    That' ...
    Spirantho Spirantho September 2014 Hardware
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ...

    ; base address of the screen
    SCRBUF_BASEADDR ...
    push hl ; address of int16: 1
    ... /> ; if half-line is 0 (A=0)
    or a< ... /> str_err_unknownescape db "bad escape character", 0
    str_err_unmatchedcloseparen db ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ...

    ; base address of the screen
    SCRBUF_BASEADDR ... /> ; if half-line is 0 (A=0)
    or a< ... sets carry flag if bad escape char
    unescape ... /> str_err_unknownescape db "bad escape character", 0
    str_err_unmatchedcloseparen db ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…

    ... function, these are giving bad results:


    ; base address of the screen
    SCRBUF_BASEADDR ... /> ; if half-line is 0 (A=0)
    or a ... /> str_err_unknownescape db "bad escape character", 0
    str_err_unmatchedcloseparen db ...
    Paradigm Shifter Paradigm Shifter September 2022 Development
  • Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…

    ... SSS = scan line (0-7)
    LLL = character line (0-7)
    ... to modify the screen address directly rather than constantly ...
    Notice the screen address 010BBSSS LLLCCCCC

    address and attribute addresses. I ...
    Alcoholics Anonymous Alcoholics Anonymous June 2003 Sinclair Miscellaneous
  • POKE, PEEK and RANDOMIZE USRAnyone got a store of useful POKES, or RANDOMIZE USR statements with interesting effects? As a start, try anything from RANDOMIZE USR 1216 to RANDOM…

    ...
    -----------------------
    Line renumbering
    address default designation property
    23756 245 (none) POKE 23756, 0 renumbers line ... # 1 to #0, line #0 cannot be deleted ...
    Golfareninsweden Golfareninsweden October 2003 Sinclair Miscellaneous
  • Cloning Microdrive Sectors?Hi everybody, I made a posting in the MIA/STP/SDP forum a while back about attempting to preserve the very well protected Microdrive cartridge "LERM…

    ... /> Start address: 23813
    File length: 40746
    Auto-run line: 0

    Record 0 ? Sector 187
    Records 1 ...
    jp jp August 2005 Development
  • Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …

    ... character
    LLL = vertical character line (0-7) within a block

    ; Computes the attribute address corresponding to a screen
    ; enter: hl = screen address
    ; exit : hl = address of attribute square
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Questions from the new owner of a grey Spectrum +2I managed to pick up a grey Spectrum +2 off of ebay with cheap shipping (I'm in the US... it was $13 total and it has a Donkey Kong tape inside) and …

    ... jumper wire for the additional address line and some sort of additional ... 's probably easy... if complex address decoding is needed I'm ... direct connection might be a bad thing and was hoping someone ...
    JamesD JamesD September 2006 Hardware
  • Opus Discovery and +2A?Can anyone tell me if the Opus Discovery is compatible with the +2A. I've just bought a +2A off Ebay and couldn't find any info on compatability. If…

    ... maximum of 8 peripherals max [0] - one of which being ... the edge connector.

    [0] actually, there was nothing stopping ... from looking for a specific address from the remaining 128 ... just looked for a particular address line being low when IORQ was ...
    Winston Winston February 2007 Hardware
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... /F mode uses 15bit address line and 8bit data line, /CS, /RD, /WR ... /F mode uses 2bit address line and 8bit data line, /CS, /RD, /WR ... that is read, and bit 0 could represent ULA and bit ...
    LaesQ LaesQ October 2007 Hardware
  • New Functions for Sinclair BasicA total of 52 new functions can be added to Sinclair BASIC; 26 numeric functions (A-Z) and 26 string functions (A$-Z$). Owing to the internal structu…

    ... provide a default library in line 0, here are the first 18 ... />
    ---
    DPEEK (address)
    FN P (address)

    DEF FN ...
    jp jp January 2008 Sinclair Basic
  • Faulty M1 LineHello, I've got a new DivIDE but it's not working with my Spectrum 48k+. I've got a sneaking suspicion that it's a faulty M1 line. Is there any way …

    ... have a machine with a bad M1 line, I keep meaning to ... hot air, then use a 0.8mm drill in a drill ...
    Winston Winston February 2008 Hardware
  • Faulty Spectrum (help requested)I have an issue 6a specci. It's Z80 has the fault m1 line problem (Multiface 128 does not work). So I decided to put in a new Z80 but unfortunately i…

    ... /> This is not necessarily a bad RAM issue. If the RAM ... pattern, I would suggest the address bus isn't connected correctly ... case. My feeling is one address line is not connected, causing some ...
    Phu Phu February 2008 Hardware
<1234567…34>

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