-
just thinking about ...compo for zx 16k ? anyone ?
... Contention Competition, since all the lower RAM is contended. Don't see ... of ULAplus is that the RAM requirement is no bigger than ... -
When would you use LD A,R ?Can anyone tell me a practical use of LD A,R and LD R,A I am confused when you would need to use it? Cheers
... is checksum a chunk of lower RAM in whatever state it was ... in on power up (RAM doesn't start set at ... it down). The chunk of RAM that I use is the ... if setting a chunk of RAM to 0xFF, then doing a ... -
faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…
would i get an electric shock if i touched lower ram chips why speccy is turned on? -
faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…
I'd still put money on it being lower RAM. (I've replaced plenty of faulty lower RAM chips, but never found a hot one). -
faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…
... it being lower RAM. (I've replaced plenty of faulty lower RAM chips, but ... -
just thinking about ...compo for zx 16k ? anyone ?
... I register:
In RAM > 32768: doesn't exist ... don't want...
In lower RAM: gives you ULA snow.
zx spectrum +High i bought a spectrum + a while back that endend up that it didnt work.. the screen was just a scramble of colours..ive change the ktc(ztx650) and…
Almost certainly dead lower RAM (if the internal power supply ever fails, and the -5v is not present, the 4116 chips tend to die - indeed, there is a warning about this in the 4116 datasheet).zx spectrum +High i bought a spectrum + a while back that endend up that it didnt work.. the screen was just a scramble of colours..ive change the ktc(ztx650) and…
is it possible to test any of the lower ram with just a volt meterTest single ram chips?Is it possible to test single ram chips? Micky
... on that cart. bypass the lower ram , enabling testing.
[url ...memory chips spectrum +Hi with regards to memory chips the ones in there are tms4116 in the lower memory.there is some on ebay MCM4116BP20 can i mix these with tms ones or …
... or ULA to access the lower RAM, but they have worked for ... 'actual' access time of the lower RAM that is required for the ...memory chips spectrum +Hi with regards to memory chips the ones in there are tms4116 in the lower memory.there is some on ebay MCM4116BP20 can i mix these with tms ones or …
... 'actual' access time of the lower RAM that is required for the ...16 K Sinclair Spectrums Still Available?Hi. I wanted to know if the 16 K Sinclair Spectrums are still available to buy. I have looked around on the net without any success. Maybe someone kn…
[QUOTE=rustyredline;415383]the lower ram 16k should not be touched ... ...
4116=Lower ram=16K
4164=Upper ram=32K
ram is not working.
Spotted on ebay.Just spotted this possible bargain on ebay, its collection only but no ones bid on it yet still a few days before it ends though. Disclaimer: I am …
... 1 has to have dodgy lower ram.
but now it ...Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
... also a -5V used by lower RAM).
[*]Check clock signals (video ... to check function.
[*]Replace lower RAM (because that's [I]very ...Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
[QUOTE=RetroTechie;430214]
[*]Replace lower RAM (because that's [I]very[/ ... use a hungry horace cart + ram turbo / interface 2... to help ... starts up with that in.. = lower ram issue :)Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
My guess from watching the video: Lower RAM or the ROM is defective.Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
... , the voltage will be somewhat lower, and probably OK.
Lower RAM or the ROM is defective ... /> Check the the 4116 (lower 16K of RAM) have all correct voltage ... -12V are absent or much lower, then check the power circuits ...Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
... =gibs;431155]
If the ram is faulty and if I ... fault is in the upper RAM bank (the 32K bank).
lower RAM bank (the 16K bank).
Lower RAM cannot be ... if any of the RAM chips in the lower bank is hotter ...Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…
... sufficient for that (even if lower RAM, ROM or CPU isn't ...IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... up an interrupt table in lower ram. I know that the 128K ... /shorter due to different contended ram banks on newer/older 128 ... sets up DOS without touching RAM pages) but on CF card ... changes loads of stuff in lower ram. In the ROM its a ...Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... the PCB? What 32 K RAM have you used?[/QUOTE]No ... 8 4164 rams for the lower ram instead 8 4116 rams.
The 34k ram is a NEC D43256BCZ-70LL ... . It is for the upper ram.
MickyRemove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... 3 ICs which replace the lower RAM?Broken speccys on ebayI often see broken speccys on ebay,the usual listings of no display on pic etc,i know could be opening a can of worms when buying one,so can [B]some[…
... 's what I found..
lower ram issues, no biggy to fix ... with a cart.. showed the lower ram was bust in 1... thats ... a cart will bypass the lower ram, well first bit..
Yeeeees finally got one!If anyone wants to make me an offer for the ultimate games pm me. I'm not that bothered by them tbh. [URL="http://www.youtube.com/watch?v=mVgYKMTqL…
... :)
as for the Ram turbo.. the interface 2 clone ... :) ) ya know it's the lower ram that's f'd.. :) if ...Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
... Spectrum not?
RAMCSL switches lower RAM off (16384-32767)
RAMCSH1 ... switches first part of RAM off (32768-49151)
RAMCSH2 ... switches second part of RAM off (49152-65535)
With ...Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
... Spectrum not?
RAMCSL switches lower RAM off (16384-32767)
... RAMCSH1 switches first part of RAM off (32768-49151)
... RAMCSH2 switches second part of RAM off (49152-65535)
... is rare memory. Static ram with battery backup is better ...RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…
... required, something needs to refresh lower RAM).
The main issue ...I Just Listed some games on eBay[URL="http://shop.ebay.co.uk/shineyflower/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p4340"]I've just listed some games on eBay, and a couple of Larg…
hairy, did ya try em with an interface 2 and a cart? just a thought.. thats how I knew the lower ram on 1 machine was knackered :)
