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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- ... got a 16K speccy with one of these 32K RAM paks!
16K model with this 32K RAM pak.
< ... of playing them!
16K RAM paks were very popular for ... -
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 ... the 512K battery-backed RAM and a snapshot button. ... 48K and 128K Spectrums (not 16K)
[*]Loads 48K and ... in the built-in RAM and are instantly available ... run from the built-in RAM, including ZX80 and ZX81 ... -
16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.
How come emulator's in 16k mode don't provide 32 ram-pack support. -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... RAM, with the registers in the lower 16K and buffers in the upper 16K ... as you would some paged RAM. That's what I'm ... CPLD to arrange the lower 16K of the Speccy's memory ... ethernet board's ROM and RAM, and then only two address ... -
RAM Upgrade for ZX Spectrum?Check out this [url=http://cgi.ebay.co.uk/ZX-SPECTRUM-ZX-PANDA-16K-EXPANDABLE-RAM-PACK_W0QQitemZ290193305868QQihZ019QQcategoryZ50223QQrdZ1QQssPageNam…
... .uk/ZX-SPECTRUM-ZX-PANDA-16K-EXPANDABLE-RAM-PACK_W0QQitemZ290193305868QQihZ019QQcategoryZ50223QQrdZ1QQssPageNameZWD3VQQcmdZViewItem?_trksid=p1723.m144 ... couldn't have had a 16K Ram expansion pack because a) none ... -
Memory paging in 128 KB - 64KB RAM possible?I have found a quote in Spectrum 3 manual (available at WOS) -------------------- In the +3, we have crammed in more than twice the amount of memory…
... fact 131072 bytes of
RAM and 65536 bytes of ROM ... 16K of
ROM and 48K of RAM ([B]or 64K of RAM ... -
Problem upgrading 16K SpectrumHello Spec-chums, I've been a long time Commodore user, but also a long-time Speccy admirer (and emulator user). I've recently got hold of a Issue 2…
... discovered that it was a 16K model, but reading the ... machine froze on start-up RAM-test, showing a white ... one of the 4164 RAM chips allows it to ... has 16K.
I've tried juggling the RAM chips ... 16K is recognised.
I'm guessing one of the RAM ... -
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…
... new, but only reports 16K working with the Sinclair ... sockets and installed all new RAM. Same problem!
< ... are part of the RAM upgrade, they all ... thats the whole of the RAM upgrade chippery tested!
16K
The PCB ... -
SRAM replacement for lower 16KSome time ago I wondered if it were possible to replace the lower 16K RAM of a 16K/48K Spectrum with a single SRAM chip. You know, those pesky 4116 D…
... to replace the lower 16K RAM of a 16K/48K Spectrum with a ... -
48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…
... slight fringing, oscillating attitude of upper part of top row of ... is hot too. And all ram chips are slightly warm. All ... a symptom of other parts failure (caps, transistor ?). I noticed also ... -
Dumb question but deep answer wantedWhy is the ram on the 48k made up of 8 chips. Both upper 32k and lower 16k (4116) are set up like this. Taking the 4116 as an example this us a singl…
Why is the ram on the 48k made up of 8 chips. Both upper 32k and lower 16k (4116) are set up like this. Taking the 4116 as an example this us a single 16k dram chip, so why the need for 8 of them?
I've read so much I am going snow blind;-) -
Upgrading 16k MemoryHi All I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flashing blocks)…
... a fully working issue 2 16k spectrum and a broken issue3 ... the upper 32k from the broken spectrum to the working 16k?
I bought the 16k from a friend in 1988 ... -
How the spectrum generates the video from ramHi everyon, I know that most people here allready know this but i think i found out how the spectrum acctually dispalys stuff and why the LD x, (HL)…
... the first K of ram to video memory and ... The spectrum has its lower 16K separated from the higher order ... accessing the higher order ram (> 16K) the ULA (or ... case) reads from the 16K memory and can display ... which would be pointing to 16K) and you write your ... -
Speccy boxes with no RAM markingHi people, I noticed the other day that my Issue 1's box is different to the others. All the other boxes have "16K RAM" or "48K RAM" printed on them…
... the other boxes have "16K RAM" or "48K RAM" printed on them in ... at all, but has a "16K RAM" sticker on one end only ... -
128K+2A/+3 RAM layoutDoes anybody know how physical RAM is mapped to ZX 128k+2a/+3 address space ? There are four 64Kx4 chips IC4-IC7. IC4-IC5 seems to be contended (vide…
Does anybody know how physical RAM is mapped to ZX 128k+ ... be contended (video RAM). It would mean RAM banks 4-7
16K bank goes to which part ... . I am also looking for RAM test program, can be on ... -
Justin Beeper - new demo for the unexpanded 16K Speccy[img]http://pouet.net/screenshots/57726.png[/img] This was my entry for this weekend's [url=http://www.sunrisedemoparty.co.uk/]Sunrise[/url] demo pa…
... real scene demo for the 16K Spectrum [i]without[/i] AY ... of fast memory on the 16K means that you can't ... . And doing everything in contended RAM means you're quite constrained ... -
Ram Turbo compatibilityThe Ram Turbo interface, couple of joystick ports (iirc they can be Kempston too) and a IF2 style cartridge slot. This one > [url]http://www.worldofs…
The Ram Turbo interface, couple of joystick ... this correct then:
16K / 48K / + , obviously yes.
OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... the original ROM from the 16K and 48K machines (this requires ... line, providing tokens are in UPPER CASE and the variable contains ... Printer support is removed, the RAM formerly used for the printer ... , but quite useful on a 16K machine).
* More ...Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…
... the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade ...16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …
... 16k board (thank you PMSR) that i added the logic and ram ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... ULA chip fitted in Spectrum 16K/48K/Plus machines.
RAM to implement an extra memory ... replacement ULA to touch the upper half of the case, and ...I want to upgrade 16k to 48k - need help.I recently purchased a lovely little 16k machine (Issue 2) but I'd like to upgrade it to 48k. I'd rather not use a Ram pack as I think they are ugly…
... purchased a lovely little 16k machine (Issue 2) but ... 'd like to install the RAM internally.
... empty sockets for the RAM but it looks as ... though there are some non-RAM chips missing too ic23, ... Where can I buy suitable RAM and the other chips?
maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
What is the maximum addressable RAM for a Z80 using bank ... is divided into four 16k sections. Any 16k page from the 4 ... kB) are used as video RAM, but can be used for ... , the additional 64 kB of ram is mapped on pages 248 ...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…
... to buy an Issue One 16k rubber key the other week ... indicates a fault with the RAM
I acknowledge that ... />
Assuming it is the RAM, is there a standard recommendation ... for adding sockets for the RAM at least.
Cheers ...ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
... Zx Spectrum 48k working as 16K , it came like this from ... 48K?
What chip ram can i put in the ...Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…
... won't load anything over 16k. It is an Issue 3 ... />
I carried out the RAM test I found elsewhere on ...Repalce 4164 RAM by 41464Dear all, I have some amount of 41464 DRAM from old PC VGA card which are useless at the moment. I think to keep them as a spare for the upper 32k R…
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... that write to an external RAM chip, then using a ... memory to the external screen RAM.
Could ... the top half of a 16K RAM that overlaps the second ... that data into its video RAM space (which is how ... force it into the uncontended upper memory so it can ...Spectrum Spares in my Shop!Hi everybody, Excuse the spam please. :) I've update my Spares section of my shop here: [url]http://www.mutant-caterpillar.co.uk/shop/index.php?cPa…
... the usual stuff like RAM chip (lower 16K, upper 32K, all 128K), CPU ...Is my ZX81 RAM Pack OK?Hi guys I've just taken my 16k RAM pack apart to give it a clean inside and out and i noticed these strange burn type marks!? [IMG]http://s7.postim…
... /> I've just taken my 16k RAM pack apart to give it ... this burn marks!? Is my RAM pack damaged I haven't ...
