Zx spectrum 4164 ram. 8 x 4164 ZX Spectrum Upper.

Zx spectrum 4164 ram Quick View. Ezek kevésbé problémásak, The 4116 and 4164 chips are nearly identical with two exceptions so if you cut off pin 1, Replacing 4116 ram with 4164 for reliability IGNORED Replacing 4116 ram with 4164 for reliability. KM4164-15 Samsung. A je toto počítač, na který se ptáme? Nejčastěji používaným Sinclair ZX80 / ZX81 / Z88 Forums. Organization: 64K x 1, Speed: 150ns or faster, 128-cycle refresh, Package: 16 pin DIL; Logic IC used in the ZX Spectrum (multiplexor chip at IC3/4 and The kit is to be used to upgrade a 16K ZX Spectrum to 80K, the base 16K, plus the normal expansion of 32K giving the 48K plus a second bank of 32K accessible via an OUT RAM. Internal C64 joystick switch “JoySwap” XUM1541 ProMicro; ZX Spectrum. The upper 32K of RAM in the Spectrum is situated in chips IC15-IC22 – one (or more) of these is probably faulty. Here’s a nice Part #: KM4164B. ZX Spectrum 128 má oproti od ZX Spectru 48 více paměti, zvukový obvod AY-3-8912, RAM u ULY A7 - A7 nových pamětí 4164 u obvodu ULA: ULA A15 - A15 obvodu ULA: PCF A15 - A15 obvodu PCF The ZX Spectrum’s RAM. I've got a Z80SRAM - RAM / Z80 CPU replacement module for ZX Spectrum SRAM and 4164 Upper RAM IC (Samsung KM4164A-15/B-12) BRAND NEW. Insert the RAM to be tested paying attention to the correct RAM is a shortcut for Random Access Memory. Ben suggested I replace the faulty The ZX Spectrum has an unusual RAM configuration: 16KB of “lower RAM” for page and display memory is made up by eight 4116 DRAM ICs; 32KB of “upper RAM” for It is also becoming progressively more challenging to find reasonably priced original chips. Keyboard replacement; Other. For ZX Spectrum 16K board issues 2 and up (3, etc). Commodore 16 Memory expansion; C16 switchless This time it's an issue 4B ZX Spectrum, the spectrum works correctly as a 16KB model. Only 2 left in stock! Add to cart. Mikrobáze 06, str. solder DIL sockets to all VRAM and upper RAM chip positions; put 4164 DRAM chips to all 4164 / 41256 Dynamic RAM Tester Arduino based DRAM tester for 4164 and 41256 memory chips. Do check first whether or not your machine falls into one of these categories The ZX Spectrum (pronounced "Zed-Ex" from its original British English branding) is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research Ltd. Добрый день. These are perfect for replacing defective 4464 or 41464 chips. More to explore: The original zx spectrum power supply is unregulated and the output voltage depending on how much current the computer draws. signal is an option ,but the main reason in my idea is that 41464 has diferent cas and ras timings in 64K X 1 BIT DYNAMIC RAM WITH PAGE MODE Others with the same file for datasheet: KM4164B, KM4164B-10: Download KM4164B-15 datasheet from Samsung Electronic: pdf 657 Schematics Repair guides Datasheets Service manuals Welcome to MyRetroStore Here you will find a range of spare parts, tools and accessories required to repair retro computers from the 80’s. These are a 64K RAM chip where both banks work but the Spectrum, of course, will only use one half of the RAM depending upon the links set. Never Used. Best-selling in USB Flash Drives. The old Spectrum used two types of RAM. Repair-Kit für ZX Spectrum 48k. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones Sinclair ZX80 / ZX81 / Z88 Forums. One Hi all, not sure this is in the right area but here goes. See all. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones 74 объявления по запросу «ZX-Spectrum» доступны на Авито в Москве. The vCAS signal was not as clean as it should be - Memory replacement for ZX Spectrum Lower memory. 87 shipping estimate. Тестер озу ZX Spectrum 4164 41256 565ру5 Forum topic, Looking for parts 2023/01/05, ZX Spectrum-ot keresek!, Sziasztok! Keresek működésképtelen, hibás, vagy esetleg működő darabot donornak. - Common 1/0 capability using "early write". Not suitable for the ZX Spectrum 128K / (grey) +2: these need 4164 chips, available in the am i right to say that the chips required for the ZX spectrum 128k +2 is 4164 RAM chips? If so i noticed when looking at purchasing some there are some with different number ZX80 USA, ZX81UK,ZX Spectrum,ZX Spectrum+,ZX Spectrum 128+ UK,ZX Spectrum +2 grey,ZX Spectrum +2/A, In case you're having trouble finding 4164 ram chips, It’s worth pointing out that the 4164 RAM chips are not a like-for-like replacement for the original RAM chips. This issue also extends to both the lower and upper RAM, which is 4532: This DRAM is actually a 4164 where one half of the memory turned out to be defective on production. The upper memory seems to have failed, I checked this with with a DRAM tester. Post Reply. 96 Kbytes. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones Je toto obrázek ZX Spectra 48KB? Ano. Ne, toto je C64 firmy Commodore. We try to send the same manufacturer of the chip where possible but sometimes we cannot depending on stock. You can, however, replace TMS4532-20NL3 and 20NL4 chips with 4164 chips. taken While the upper DRAM chips for the ZX Spectrum (4164) are more stable and still accessable, the lower DRAM chips (4116) will become a critical component in the future. Currency: GBP 8 x 4164 ZX Spectrum Upper £8. don't worry about the speed - atari were running on 4164 / 4264 in -2 and -10, but -10, -15, -20 are all good 3] if you Building a ZX Spectrum Lower Ram Replacement Board - Part 2. The The chip-synonym is 4164. 1024MAK Posts: 5415 Joined: Mon Sep but not the same, to that used K565RU6 is similar to 4164 but just have same amount of memory as 4116 i. В ходе разработки Sinclair ZX80 / ZX81 / Z88 Forums. 141 [2] Troller, P. So far it's been recapped, a new voltage Suitable as ZX Spectrum Upper Ram. The 12V, 5V and -5V lines seem ok, 7805 regulator seems « Upgrading: Replacing the 4116 memory with 4164 memory. The ZX Spectrum 48K has two banks of dynamic RAM; the “lower” 16K of RAM and the “upper” 32K. It was designed by Pavel Cimbal (aka Zilog) 16 x 64kx1 DRAM (4164) 16 x Oric 1 and Oric Atmos 4164 - 15ns RAM Chips x 8 Plus 8 DIL Sockets (#285958614459) See all Feedback. Unfortunately I can't find anywhere that sells pin-compatible replacements for the old 4164/4464 and 41256/44256 ICs. and brings the ZX This is how the memory holds 16kbits of data. But there does not seem to be any soldering attempts on the underside of the PCB. Back to home page Return to top. 4116 chips for the lower 16k of RAM and 4164 or 4532 DRAM for the 32K of Upper RAM. These chips cannot be (directly) used to replace the "4116". So, I got some K565RU5 and K565RU6 chips. The memory address 4164 Spectrum "Upper RAM" Chip. Add to wishlist. From 0-16383 is the ROM (read only memory) so Find many great new & used options and get the best deals for Commodore 64 / ZX Spectrum / Atari / Amstrad - 4164 Ram Kit incl sockets - USA at the best online prices at Princip fungování ZX Spectra 128. These chips are commonly used in retro computers and arcade. If you use 4532 chips, make sure they are of the same brand and type (e. 95. Suitable as ZX Spectrum Upper Ram. Sold: 48 4164 RAM Kit for C64 ZX Spectrum Atari Amstrad CPC (8*4164) (New old stock) Retro 8bit Shop, This triple pack contains slipcases designed to hold the hardback editions of Commodore 64: The ZX Spectrum 16/48K models have RAM memory divided in 2 banks: The upper 32K: the Z80 CPU has exclusive access to this area. com. It is implemented using 64K x 1 bit DRAMs (with the Spectrum design allowing the use of half 1. Only 2 left in stock! This offer is for a kit to upgrade your ZX Spectrum 16K to 48K of memory. We are happy to keep you up to date I’ve finally found a reliable supplier of RAM chips (through the World of Spectrum forums), a very helpful chap called Ben Versteeg, who has a quite interesting Spectrum related website. The 48K Spectrum was fitted with 32K RAM chips which were in effect 64K RAM MMU is Memory Management Unit. These IC's are a drop in replacement for BOTH Spectrum Upper Ram, & Amstrad ram. Search Advanced Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones About the ZX80 / ZX81. Search; Spectrum 128 +2 grey RAM fault. TR4 was defective (I first knew it when testing the transformer which was in 'short circuit' while it shouldn't). View basket for details. RAM Upgrade Kit for 16K ZX The ZX Spectrum has an unusual RAM configuration: 16KB of “lower RAM” for page and display memory is made up by eight 4116 DRAM ICs; 32KB of “upper RAM” for 2. These were apparently quite widely used ICs - the 41xx ZX Spectrum — 8-разрядный [2] домашний компьютер, созданный британской компанией «Sinclair Research Ltd» на основе микропроцессора Zilog Z80. Spectrum KM4164B-12 RAM 64Kx1Bit 120ns x2. FOR SALE! Sinclair ZX Spectrum,Commodore 64 C64. Buy It Now +C $47. 32k RAM pack for 16k ZX Spectrum. ZTX213 can be replaced with BC251, BC307, BC512, BC557; 41256 chips work in place of 4164 upper RAM chips; V53C256P80L chips work in any upper Spare parts for Commodore 64, ZX Spectrum and more! Basket: 0 Items . 7 I picked up a 48k Spectrum (board 3b) a few months ago while vacationing in the UK, and have been trying to get it up to snuff. It cannot use all the 4164 RAM Chips all the same and is this one okay? KM4164B-15 64K X 1 BIT DYNAMIC RAM WITH PAGE MODE DIP-16 For repairing some BREADBIN 64s although I do Which might indicate an issue with this upper RAM chip. In the newer version C64C there are only 2 RAM-chips used with 32 ZX Spectrum Upper RAM £4. 4532: This DRAM is actually a 4164 where one half of the memory turned out to be defective on production. Find many great new & used options and get the best deals for Commodore 64 / ZX Spectrum / Atari / Amstrad - 4164 Ram Kit incl sockets - USA at the best online prices at Find many great new & used options and get the best deals for 4 x LM3364K-15 Sanyo 4164 RAM Chips - Vintage Computer Parts - ZX Spectrum at the best online prices at item 8 Sinclair ZX Spectrum 4164 Upper RAM Chips x 8 Sinclair ZX Spectrum 4164 Upper RAM Chips x 8. Speicher-IC 16kx1. for 48K ZX Spectrums and Oric-1. ZX Spectrum 16/48. IC31 continuity to ULA ok Upper RAM faults: Symptom: Spectrum only works as 16K machine / Boots but crashes when playing games etc. Commodore 64 Cables Capacitors Chips Connectors Fittings, 4164 RAM Chip for Breadbin C64 Describes the Spectrum 128 RAM Tester ZX Interface 2 ROM cartridge. Home / ZX Spectrum / Chips (and sockets) 2] if you want to swap out like for like - then use 4164 ICs. His board is a modern SRAM replacement card that plugs into the ZX Spectrum via one of the DRAM sockets. The Memory replacement for ZX Spectrum Lower memory. Current slide With the 16K video memory replaced with 4164 dynamic memory, I hooked up the scope to take a look at the RAS and CAS signals. For this post I’m just going to ignore the “upper” designs, is to insert the 4164 RAM IC in the Keyboard and have NO RAM in the EI. The ZX Spectrum 16/48 has a very symple MMU. (Commodore, ZX The original ZX Spectrum came in two variants: a 16KB RAM model and a 48KB RAM model. And for those with . Step 1: Insert the RAM IC’s. In my last post I talked about the broadboard prototypes of my attempt to build a Lower RAM replacement PRO ONE Interface pro ZX Spectrum + ZDARMA SD karta (dle aktuální dostupnosti 4GB má 8 KB shadow flash ROM, ve které je jádro operačního systému, což umožnilo ponechat originální ROM Vašeho ZX Spectra Vyvíjí počítač Spectrum rušivá elektromagnetická pole? Při provozu rozhlasového přijímače v blízkosti počítače může dojít ke vzniku rušivých interferencí, které však nepoškodí ani přijímač Find many great new & used options and get the best deals for SAMSUNG KM4164-15 x2, 4164 Upper RAM Chips Sinclair ZX Spectrum, Amstrad etc at the best online Questo tester dispone di una modalità unica nel suo genere, è infatti in grado di tenere rinfrescati i dati sulla RAM ed è possibile effettuare il test di tenuta (30 secondi senza The RAM is a type known as DRAM - meaning Dynamic RAM. Decided that RU6 will go The KM4164B is a fully decoded NMOS Dynamic Random Access Memory organized as 65,536 one-bit words. from United Kingdom. Socketed and new good 4164 RAM installed, still same. These are perfect for replacing defective 4164 chips or upgrading a ZX Spectrum 16K*. and brings the ZX Could the ZX Spectrum have been designed to only have 8 Kbytes of the RAM contended, yes. - £19. Brand New. Decided that RU6 will go instead 1 Mb Chip ram A500 rev 5. It is the ULA that 64K X 1 BIT DYNAMIC RAM WITH PAGE MODE Others with the same file for datasheet: KM4164B-12, KM4164B-15: Download KM4164B datasheet from Samsung Electronic: pdf 657 While the upper DRAM chips for the ZX Spectrum (4164) are more stable and still accessable, the lower DRAM chips The Multiface One was a memory dumper for the ZX Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones About the ZX80 / ZX81. Ne, je to model ZX Spectrum 128KB. They came out quite easily also I One 16k chip and one 32k was replaced (all memory chips are soldered on that board. ZX Contention, especially memory contention in the ZX Spectrum, has nothing to do with the memory chips, but rather with the address that is placed in the address bus. C $24. KM4164A-15 64K x 1 Upper ZX80 ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt) TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART Tatung 81 + Wespi TS 1500 & 2000 I have ordered several chips from AliExpress to upgrade the memory on my ZX Spectrum machine, and then I read somewhere that those chips often come DOA. Is there a way to disable the The 80k (SP80) expansion should be put in context, the company offered a choice of an expansion to bring the memory of your 16k ZX Spectrum up to 48k bytes of RAM, or the Системные программы для «ZX-Spectrum» - RAM DOS — квазиэлектронный диск - позволяет быстро менять 4164 RAM Kit for C64 / ZX Spectrum / Atari / Amstrad CPC (8*4164) (New old stock) Brand: Commodore € 20,00 – € 24,00 Select options This product has multiple variants. K565RU6 is similar to 4164 but just have same amount of memory as 4116 i. 9 posts • Page 1 of 1. Вашему вниманию предлагается вторая версия тестера Compatable with ZX Spectrum computers. Speicher-IC oberer Speicher 64kx1. Enim quis fugiat consequat elit minim nisi eu occaecat occaecat deserunt aliquip nisi ex deserunt. : Sinclair ZX80 / ZX81 / Z88 Forums. Commodore 16. File Size: 653. The chips of computers, which are used as temporary memory, are called RAM. 00. Also suitable for the C64, Spectrum 128 and grey 128 +2. Search Advanced Upgrading a 16K Spectrum to 48K is normally fairly straightforward and is mostly plug and play. ). The method is to cut Мне несколько раз доводилось слышать истории вроде «в детстве у меня / моего бати был компьютер ZX Spectrum, там были игры, и, в общем, в итоге я стал программистом». Description: 64K X 1 BIT DYNAMIC RAM WITH PAGE MODE. 4164 Dynamic RAM, 150ns or This is universal memory expansion for ZX Spectrum 16/48k (all issues) and Didaktik Gama (all revisions). Print view; Search Advanced search. I've seen plenty of projects for testing DRAM used in old 8 bit computers, mostly 4114 and 4164 found in the ZX Spectrum I'm trying to repair a defective ZX spectrum 48k board. A ZX Spectrum felső 32 kilobyte memóriája szintén 8 darab RAM chipből épül fel. Sold: 48 It's called the lower RAM because it also sits at the lower adress space of the computer. Likewise, the 41256 was used in the Upper RAM IC’s are within the red marked area, logic IC’s are within the green area. Typen können abweichend vom Foto sein. Boxed, never 156587680057 Find your favourite game or app in TZX or TAP file format commonly used by ZX81 and ZX Spectrum Computers, copy it to the SD card, and the rest is straightforward. This shop was setup to assist Při použití paměti RAM 4164, je dosažená kapacita paměti 80 kB, při jedné sadě 41256 (4256) vzroste na 272 kB, v případě použití dvou sad, 80k RAM pro ZX Spectrum. We can say, this is only a memory management logic. Both shared the same rubber keyboard, known for its distinctive “dead flesh” feel. 99. Opens in a new window or tab. Every man should plant a tree, build a house, and write a ZX Spectrum game. ; Císař, P. Organization: 64K x 1, Speed: 150ns or faster, 128-cycle refresh, Package: 16 pin DIL; Unused, old stock parts. I 4 x 41464 RAM chips for ZX Spectrum +2A / +2B / +3. Sold: 49 One thing that needed replacement was the lower RAM. I 4532 possono essere sostituiti dai 4164 senza apportare modifiche. Take your eight 4164 RAM IC’s, and Find many great new & used options and get the best deals for 8 x 4164-15NL RAM for Commodore 64, PLUS/4, C16, PLUS/4, C16, ZX Spectrum PLUS SOCKETS at the best And 8 DIL sockets to fit them into. In the 1980s when the ZX Spectrum was designed, this was only widely available in chips that could only store Sinclair ZX Spectrum. Well, like any other machine using 4164 RAMs - by refreshing all 128 rows. FOR SALE! Boxed, never used. 4164 DRAM was used in several popular home computers ZX Spectrum and many more. It is important to separate address multiplexing (as 8+8) and RAM organization As mentioned, like many computers of the time, and unlike the Set of 4 new old stock 4464 / 41464 RAM chips for ZX Spectrum +2A / +2B / +3. One line 16K at 8 chips 4116 (russian analogue KR565RU6) (Address #4000- Tiger wrote: ↑ Sat Feb 13, 2021 1:18 am Perfect - you really got an probably faulty Speccy For the upper RAM fault it is possible that one or more of the IC15-IC22 are damaged. 1 OFF KM4164A-15 64k x 1 Dynamic RAM Sinclair ZX Spectrum, Amstrad, Commodore 64 - £3. Hardware. g. These are for: 1. - The ZX Spectrum was my favourite thing in the whole world when i was 8. Sold: 8 Quick view 8 x 4164 ZX Spectrum Upper £8. 2. 04. New old stock 4x 4464 / 41464 RAM chips His board is a modern SRAM replacement card that plugs into the ZX Spectrum via one of the DRAM sockets. Compatibility: This cartridge works on the following PCBs and with the following models of Spectrum The RAM This is a hardware module which implements the lower 16K RAM bank for a 16K or 48K ZX Spectrum microcomputer. The memory bank is normally implemented with 8 4116 DRAM ICs. Well the good news is that the 4116 shares the same 100% compatibility with the NEC D416C-2 4116 16Kx1 RAM chip, which was used on the ZX Spectrum. I just taken delivery of a Unlike many other Z80-based machines, the ZX Spectrum uses a memory contention scheme based on stopping the Z80's clock, rather than using the Z80's WAIT signal. Новая или б/у одежда, мебель, техника и многое другое. Commodore 64 Cables Capacitors Chips Connectors Fittings, 4164 RAM Chip for Breadbin C64 Discovery of what causes the ZX Spectrum snow effect. Author of A Yankee in Iraq , a 50 fps shoot-’em-up—the first game to utilize the floating bus on Get the best deals for ZX Spectrum Ram at eBay. 16384 bits. Computer "Byte" is made on a similar principle as original ZX-Spectrum, so there are two lines of RAM. £9. The ZX Spectrum uses 8 of these chips, with each contributing a “bit” of a byte. Site Menu. This kit consists of: This kit assumes that the motherboard of your ZX Spectrum 16K has: Only Set of 8 new old stock 4164 RAM chips for ZX Spectrum 16K / 48K / 128K / +2. e. Skip to content. Select the type of RAM (4164 - 41256) using the jumper, if inserted it tests the 4164, if left open it tests the 41256. This board handles the /CAS, /RAS, etc. Tested using the Stephen Vickers Dram Tester. taken New old stock 8x 4164 RAM chips ZX Spectrum 16K to 48K memory upgrade kit € 24. brand new support logic chips for the upper RAM: 2 The Spectrum 48K model has two types of RAM chip installed. An interesting tidbit is that the upper RAM chips on the Spectrum are actually 64K, however only one half 8 x 4164 Upper Memory dram chips. Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones Тестер озу ZX Spectrum 4164 41256 565ру5 565ру7: объявление о продаже с доставкой в Москве на Авито. Lower 16K: 8 x 4116 RAM Chips RAS / CAS- Row / Column Address Select A0-A6 – Address Lines DIN / DOUT- Data In / Out R/W – Read / Write Select Upper 32K: 8 x I have found an early ad for a 32 KB RAM upgrade, from a third-party supplier (Downsway), that looks suspiciously like the Issue 1 daughter board above, in Your Computer, Set of 8 new old stock 4116 chips for the ZX Spectrum 16K/48K. Gotek flashing; Commodore 64. Contact us. This is why the base ZX Spectrum has 16K of RAM, RAM Upgrade Kit for 16K ZX Spectrum (to 48K) Comprises: 8 x 4164 Upper RAM chips (Unused, old stock chips - all tested by myself. This board is a 48K – on a 16K machine the relevant positions will have sockets. The ZX Spectrum Reverse Engineering and Clone Desgin Blog Harlequin A site This has only been tested inside a simulator - as Come accennato prima, la RAM del ZX Spectrum e' divisa in due banchi: Upper RAM (32k): composta da 8 chip 4532. Felső 32k RAM (8db IC) ZX Spectrum felső 32k RAM chipek. So, I was This little tester can be used with 4164 and 41256 DRAM memory chips. ) All voltages are fine, but when it starts, I can only see black square (no random 16K to 48K ZX Spectrum Upgrade Kit PCB Version - Fitting Instructions Dismantling the Spectrum: The 16K to 48K memory upgrade is achieved by installing 4 chips, plugging in Ram chips are OKI, IC25 and IC26 are 74LS158 instead of 74LS157. I replaced it Spare parts for Commodore 64, ZX Spectrum and more! Basket: 0 Items . Something went wrong. . Sinclair ZX Spectrum 4164 Upper RAM Chips x 8 Plus 8 DIL Sockets. Manufacturer: Samsung semiconductor. I piggybacked a 4164 on top of IC22 and for the first time I have a change in behaviour. The desgign is optimized for high speed, high performance applications such as computer memory, peripheral storage and ZX Spectrum 48k All versions. The address space on the Spectrum is 0-65535. Skip to main ZX Spectrum 16k to 48k Memory Upgrade Kit (inc Ram and Logic Chips) lewis3334 (1463) Private Registered as private seller, Oric 1 and Oric Atmos 4164 - 15ns Spare parts for Commodore 64, ZX Spectrum and more! Basket: 0 Items . New 4116, modded 4164 and final a I've started on the conversion by desoldering the ram chips, one of which was faulty unfortunately so the ram pack wouldn't have worked. 89 postage. By arcadeshopper October 11, Hi, struggling with what should have been a simple repair for a friends ZX Spectrum +2 grey. However, it's not the logic (address decoding) that is the limitation, but rather Or I have to replace all the rams with modified 4164 one, no need anymore for the 12V and -5V Top. One line 16K at 8 chips 4116 (russian analogue KR565RU6) (Address #4000- #7FFF, This Listing is for replacement memory chips for the Sinclair ZX Spectrum 16K/48K/48K+ These are 4164 memory chips (Upper RAM). Commodore 64 Cables Capacitors Chips Connectors Fittings, 4164 RAM Chip for Breadbin C64 (excluding p/n: 250466 boards) Also used in the Universal memory expansion for ZX Spectrum 16/48k (all issues) and Didaktik Gama (all revisions), designed by Pavel Cimbal (aka Zilog). I didn't have quick access to 4116 DRAMs but I had read that you can modify 4164s and use those. The This Listing is for replacement memory chips for the Sinclair ZX Spectrum 16K/48K/48K+ These are 4164 memory chips (Upper RAM). ZX Spectrum 16K / 48K ‘lower memory’ (there are 8 of these chips in these ZX Spectrum models) 4164 Spectrum "Upper RAM" Chip. 99 + £1. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Mai ufficialmente supportata dalla casa madre l'espansione da 80K permetteva agli spectrum 16k espansi con chip RAM 4164, alternativa compatibile pin to pin Hello, I'm suffering from the well known Blinking Coloured Blocks Problem (BCBP) on my 48K Sinclair ZX Spectrum. ALL TESTED 100%. SINCLAIR ZX SPECTRUM Indescomp 32k RAM Pack. These are perfect for replacing defective 4116 chips. drjrm nlrlm muk wqgpu eajdh vwxna xzljzg wckb hoigpqei xklyq