-
4116 ram chipsI need some ram chips to fix my 48k + issue3b, I have done the composite video mod and it works, now i just wanna play games on it but its stuck on r…
I need some ram chips to fix my 48k + ... replace the lower ram chips. I can't test voltage but plan ... -
16K/48K Lower RAM (4116) replacement.You may want to read [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37957"]this thread[/URL] for background information on the quest t…
... replacement for the lower RAM that works in all ... column address to the RAM and so there isn ... the voltage levels that appear on the lower RAM address ... This happens when the voltage is pulled down by ... the ZX Spectrum Lower RAM Replacement Module, pictured below ... -
Building a ZX Spectrum and I have some voltage questionsI've posted about this before looking for parts, but now I've found all the hard-to-get stuff (thank you Retrolium!). So I figured new questions, new…
... noticed any significant difference in voltage on the board. The ... Modulator)
+5V to Lower RAM: +4.98V
+12V ... to Lower RAM: +12.56V
- ... 5V to Lower RAM: -4.31V
+ ... 5V to Upper RAM: +4.98V
Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…
... see the upper 32k of RAM.
... and even run a RAM diagnostic. Basically, tells ... the associated logic, and RAM chips, with no effect. ... connections between the upper RAM and associated logic, and ... and CPU), however, the voltage is way too low. ...How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement. Know what I found? My old ZX Spectrum.... Those were the days! Never …
... ZX81, though.
3K om RAM, my friends!
My question ... I tell what size of RAM I've got in my ...HELP 4532 or 4864 RAM wanted !Hello My real spectrum fell off yesterday I know that one RAM memory chip is out of order There was 8 X HM4864P-2 but I saw in the Spectrum schemati…
...
I know that one RAM memory chip is out of ... here to set 16K of RAM so 32K are enough to ...RAM Music MachineBoxed RAM Music Machine Sampler (for 48K, Plus, 128K, Plus two) includes the tape, microphone, manual, even original mic stand! I last got this wor…
Boxed RAM Music Machine Sampler (for 48K, ...Boxed 32k Ram packPicked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay. Thanks in advance, G…
Picked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay.
Thanks in advance, GnormanZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…
... which is probably normal since ram
test takes a ... original
Sinclair ZX 16k ram pack issue 3 .
ram pack :
... a posibility of faulty RAM somewhere on the lower ... />
Also when no ram pack is present I can ...Voltage regulator replacement?I have an 48K issue 3B that has (for unknown reasons) had one of the legs on the voltage regulator broken off. It looks like a simple replacement job…
... of the legs on the voltage regulator broken off. It looks ...PC advice reqd.My monitor/graphic card seems to be acting up! I get strange sort of flicker (similar to the ones you get at slightly low voltage) on the monitor at …
... you get at slightly low voltage) on the monitor at seemingly ... myself a 400Mhz DDR 512MB RAM.
3) My graphic card ... could also be due to voltage variations but it just doesn ...R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... is the effect of contended RAM on the R-register? I ... run any code in contended RAM, but I do make several ... , but then without the contended RAM the HALT would take place ...RAM Test ROM?Found a link to this: [url]http://www.retroreview.com/iang/TestSpec4.zip[/url] in another thread, and fired it up in SPIN, but I have no clue how to…
... this to determine which physical RAM chip needs replacing, and/or ...256K RAM chips in Spectrum 128KSince I have lot of 256K RAM chips, and my 128K has RAM error, I think about replacing all 16 RAM (64K ones) chips with 256K chips. Then it would be …
... have lot of 256K RAM chips, and my 128K ... has RAM error, I think about ... replacing all 16 RAM (64K ones) chips with ... be 'Spectrum 512K' - something like RAM in Pentagon.
... bank switching of that extra RAM - we need 2 bits ...Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…
... get hold of than Spectrum RAM. I've tried the usual ... dead Spectrums with suspected bad RAM. It'd be nice to ...Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…
... ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX- ... with one of these 32K RAM paks!
My poor ... 16K model with this 32K RAM pak.
It ... them!
16K RAM paks were very popular for ...Betadisk RAM modificationHello! I've ocassionally found this on the web: [url]http://www.nairam.sk/betadisk.html[/url] [url]http://www.nairam.sk/betadisk_02.gif[/url] Doe…
... it adds a little shadow RAM into betadisk to be paged ...Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…
We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working one, and we got the same result.
is this a ram fault? How can we check ram chips?Any interest in new low-cost mass-storage interface with 512K RAM?I've recently added support to ResiDOS and the +3e ROMs for SD/MMC card interfaces; in particular, ZXMMC (which has no onboard RAM and so is only sup…
... (which has no onboard RAM and so is only supported ... of on-board non-volatile RAM (which would allow it ... be the 512K battery-backed RAM and a snapshot button. ... in the built-in RAM and are instantly available ... run from the built-in RAM, including ZX80 and ZX81 ...Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
Hi
Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of 50 from Hong Kong but only need 10.
Best wishes
Martin BaughTesting RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…
... Gun method of removing the RAM chips from a 4S circuit ... . I wish to check the RAM chips, I have a Logic ...Missing Voltage RegulatorHello all and a very merry 2-days-after-the-speccys-25th-birthday to you all! Okay, I've just received my brand spanking new 48K keyboard membranes …
... odd reason ripped off the Voltage Regulator and heatsink. Is there ...Ram Turbo InterfaceHi all, Can any one tell me if the Ram Turbo Joystick Interface is compatible with Kempston Joysticks? Or are both the Joystick ports Sinclair 1 and…
Hi all,
Can any one tell me if the Ram Turbo Joystick Interface is compatible with Kempston Joysticks?
Or are both the Joystick ports Sinclair 1 and 2
It is the one with the Rom port on it.+2B ram chips?Hi all, I have got 2 Plus2B`s and 1 Plus2 gray case. Ok the one Plus2B don`t work, so I tried to see if I could pin down the problem. I changed the …
... br />
There are 4 ram chips on sockets on board ... Plus2B.
The one ram chip IC6 had a pin ... br /> I then removed 2 ram chips IC6 and IC4 replace ... dwith 2 other ram chips that to be honest ... br />
If its the ram chips then I shall buy ...+D and RAM Turbo interfaceJust a quick note to let a few guys in particular know that my RAM Turbo does in fact work with my +D interface. I checked continuity through the RA…
... particular know that my RAM Turbo does in fact ... I checked continuity through the RAM Turbo, and found all lines ... used to have a second RAM Turbo, and of course ... is a clone. The other RAM Turbo, which, alas, ... external devices, or som RAM Turbo interfaces don't ...Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
... . But where to get this voltage from? I know that we ...Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
Does anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more available than the 4164. Winston? Piters??
TIAWipe Out by KB RamWhilst doing a long-overdue update for Speccy Spoilers, I noticed that one of the latest additions is a game which doesn't appear to be in the archiv…
... was written by a KB. Ram in 1987. It's very ...how to set voltage regulator to the correct setting ?On the power supply that is broken it says AC adapter INPUT : 230v 50Hz OUTPUT ; 9v 200mA Regulated On the variable voltage adapter i have the…
... />
On the variable voltage adapter i have there is ... do to set the correct voltage ?PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... . I remember something about a RAM chip failure destroying internal power ... the 7805 or use another voltage regulator to get +9v? A ...
