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The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…
Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors can do this . But I suspect there are loads of other ways to damage lower RAM ICs? Any ideas? -
ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…
... read would indicate a lower ram failure. I have lightly touched the ... seem cool.
The ram fitted is 8322 4116 2N ... -
Black screen on 48k+Hello peeps Just bought a 48k+ was working fine then after leaving it off over night I turned back on to get a total black screen, no border etc. …
... back on to get a total black screen, no border etc ... seems to be an upper ram failure. ICs 15-22 apparently each ... easier way of finding which ram chip is responsible? Also. How ... -
What are the chances?Hi all, I've picked up an issue 3B, fairly clean board, no mods, wasn't starting correctly so I tried Brendan's diagnostic ROM and got this: [i…
... .jpg[/img]
Total lower RAM failure? Before I start pulling all ... the RAM out, is it possible ... -
Mapping big games using screenshotsI know it's an unpopular thing with some people, and I object to whoever did the Deactivators map as it's shit and only shows room layouts and nothin…
... ?
My PC has 1GB RAM and I'm using Paint ... 1MB each, surely with 1GB total RAM my computer shouldn't do ... -
bizarre error on a grey ZX Spectrum+2 - the long search for a small problemHi, I got a ZX Spectrum+2 that worked a bit but crashed while loading or running 128k games. I installed a 128k-test-ROM that told me about RAM fa…
... -ROM that told me about RAM failure at page 3. I desoldered ... 8 RAM chips that included page 3 as the failure seems ... to be located in several RAM cells not ... I removed the second 8 RAM chips - to save time I ... -
OT: Graphic Card problemAhem. It's me again with a computer problem! Last time I posted with a problem I was pleasantly suprised with some insightful answers that helped fix…
... card and said that the RAM was surely broken, these lines ... typical symptoms of a video RAM failure; so they gave me a ... -
Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…
... because of triple power. With RAM failure usually voltage converter transistor died ... frequent. Then: CPU, ULA, 32KB RAM chips, modulator, power supply...
Gunman kills 31 at US university[url]http://news.bbc.co.uk/1/hi/world/americas/6560685.stm[/url] :sad: :sad:
... make guns magically undergo a total existence failure, you'd not stop ...Gunman kills 31 at US university[url]http://news.bbc.co.uk/1/hi/world/americas/6560685.stm[/url] :sad: :sad:
... make guns magically undergo a total existence failure, you'd not stop ...Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
Incidentally, why upper RAM can cause you non-initialization- ... simple, and can miss many RAM failure modes - therefore, to the ROM ... routine the whole of RAM checks out OK...but isn ...Mapping big games using screenshotsI know it's an unpopular thing with some people, and I object to whoever did the Deactivators map as it's shit and only shows room layouts and nothin…
... ?
My PC has 1GB RAM and I'm using Paint ... 1MB each, surely with 1GB total RAM my computer shouldn't do ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... 0.5K screen character RAM).
There ... (nybbles of) colour RAM (thanks Jimmy!), that ... /> [code]
Name Total RAM ** RAM available for BASIC
Unexpanded ... 0.5K occupied by colour RAM nybbles
[/code]< ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... indeed have 8K of VIC RAM - In VIC-20 speak this ... VIC-20 already has 5K RAM (Only 3.5 K of ... :-
[code]
Name Total RAM RAM available for BASIC
Unexpanded ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... we have the 8K of total RAM distributed as follows.
... /> This adds up to 8K total RAM
Then we ... counted as the total 8K of RAM on a "3K ... separate 0.5K of RAM for the colour RAM, interesting!
... 0.5K of colour RAM in the "Total RAM" column.VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... " we have the 8K of total RAM distributed as follows.
This adds up to 8K total RAM
Then we also ... not counted as the total 8K of RAM on a "3K expanded ... my previously posted table, the "Total RAM" column does not include this ...Ridiculous amount of spyware and shit on my laptopHello specchums, I was having a bit of trouble recently, with my search links from google and yahoo being redrected to some dodgy fake "Check your P…
... /> Scan type : Quick Scan
Total Scan Time : 00:26:22 ... stick another 1gb of ram in, bringing total ram up to 1.5gb ... friend says with 1.5gb ram Windows XP will run on ...R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... / Ohms...would this cause the failure? It did work flawlessly until ... suggest it's a lower RAM failure, but it could be the ...How much ram has my ZX Spectrum?How can I see how much ram my ZX Spectrum has? C64 has this info in the title screen, the Spectrum not. Thanks! Micky
... can I see how much ram my ZX Spectrum has? C64 ... screen does not show the total ram.. merely the amount available in ...zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…
Without the ULA you'll see nothing, because it generates the video. If you see the black rectangle with red lines, at least partially, it means the CPU starts and trying to perform RAM test. For me, it looks more like RAM failure.Spectrum 48k boots but small black dots start appearingAnyone any ideas where I should look first?
... ULA or the start of ram failure.A thousand core CPU?Maybe this is old news to most people on here, but according to: [url]http://www.zdnet.co.uk/news/emerging-tech/2010/12/25/intel-why-a-1000-core-chi…
... needs 128MB of system RAM (twice the total RAM in the XBox), plus ... 32MB of system RAM.
< ... GB
Memory: 256 MB RAM
Other: Internet Connection, DVD ... recommended)
512 MB of RAM (1 GB recommended)
...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... br />
Removing the lower RAM was time consuming and fiddly ... almost certain is a lower RAM failure (it only sometimes fully initialises ... mechanism for refreshing the upper RAM while the ULA has ... the Spectrum with the lower RAM removed, it does sometimes ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... included in the speccy's total RAM capacity (though yes I know ... it is still RAM). But this is a completely ...RFC: Hardware Documentation ProjectI've noticed quite a few threads recently about missing schematics and suchlike. I've also been thinking about the low quality of some of the schemat…
... mode to help finding a RAM failure in non-contended area
RAM were damaged:
[url]http ... memory to help diagnosing intermitent RAM failures:
[url]http://www ...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 …
RAM failure is the most likely (but there are some other possible causes).
This last picture does indicate that the ULA is working.
[I][B]Mark[/B][/I]Faulty 48K Issue 3 motherboardHi I have a faulty Issue 3 motherboard and would appreciate it if somebody can steer me in the right direction of where to begin with the fault find…
... /> how did you check the RAM ic's ULA, CPU and ... , etc. as with a lower RAM failure.
I tested the ... RAM IC's, ULA, CPU and ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
A RAM failure is the most likely cause. ... power supplies to the 4116 RAM chips (+5V, +12V and - ... are not correct, the 4116 RAM chips will not work correctly ... ROM that will test the RAM and tell you what bits ... of the RAM are faulty.
[ ...
