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+2 OverheatingMust first give thanks to Dazza75 for supplying me a replacement +2 however it seems to be overheating and corrupting graphics in games making them u…
... Dazza75 for supplying me a replacement +2 however it seems to ... this may be?
Ram fault? ULA loose. If it ... -
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…
... of the Issue 1 internal RAM connectors, for the 16K-> ... -
RAM Turbo without a slot?Hi! I got this RAM Turbo joystick interface which surprisingly came without a cartridge slot inside. Would there be any reason someone should cripple…
Hi! I got this RAM Turbo joystick interface which surprisingly ... -
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…
... be an "almost" plug-in replacement for the Sinclair ULA chip ... is an "almost" plug-in replacement, it's for a reason ... clocks, and enough fast block RAM to implement an extra memory ... two things: to prevent the replacement ULA to touch the upper ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
Does anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ?
Looking at schematics it has to be simple solution, probably king of interleaving, but I could not find any details. -
Replacement Speaker?Can anyone suggest a suitable replacement speaker for my ZX+ ?
Can anyone suggest a suitable replacement speaker for my ZX+ ? -
Joystick Interface with built in RAM expansion?Is there such a thing as a RAM pack with a joystick interface built in?
Is there such a thing as a RAM pack with a joystick interface built in? -
CAT!RAM and PUTRAMLast year sometime I posted a couple of routines to: * catalogue the 128k RAMdisk in BASIC; * move RAMTOP and the stacks from BASIC. CAT!RAM and PUTR…
... from BASIC.
CAT!RAM and PUTRAM are updated versions ... />
As CAT!RAM is in BASIC and is ... swapping around RAM pages to get at ... threshold.
CAT!RAM prints file name & type ...
The listings follow. CAT!RAM will work on any 128k ... -
Lot's of ZX Spectrum parts: RAM chips, ULA's, etcI have new stock of 100% tested parts. I even got my hands on a bunch of ULA's!! [IMG]http://benophetinternet.nl/hobby/sales/parts/IMG_6068.JPG[/IMG…
... ]
Prices:
- Ram chips: 4164, 4532, 4116, etc ... -
Ram test / diagnostic software for 128k?I need a ram test program urgently (as I have to bring this machine into the party place tomorrow) yet I couldn't find any in infoseek by typing "ram…
I need a ram test program urgently (as I ... any in infoseek by typing "ram test" :) And most of the ... .
Are there any ram test suite which runs from ... -
RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…
... other question is how much RAM is corrupted in page 7 ... paging/transferring/rebuilding pages in RAM), so the games are loaded ... -
Replacement Microdrive RollersI have a small supply of brand new replacement rubber rollers for the QL and ZX Microdrive - they sit on a spindle on the left hand side of the micro…
... small supply of brand new replacement rubber rollers for the QL ... ://www.sellmyretro.com/offer/details/Replacement-Sinclair-QL-%25-ZX-Microdrive ... -
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 ... kB) are used as video RAM, but can be used for ... , the additional 64 kB of ram is mapped on pages 248 ... -
PlusD Mini: implementing the CPLDI am doing my first attempts on creating a CPLD to use as replacement for the PlusD's GAL (and other logic lateron). I use the Xilinx XC9500XL series…
... a CPLD to use as replacement for the PlusD's GAL ...
| f17);
// ROM/RAM select (PlusD paged in when ...
+ f17
;ROM/RAM select (PlusD paged in when ... -
Spectrum 128k +2 grey RAMhi all, the manual say that ram ic's should be KM4164B-15P but when i open my spectrum (not repaired by anyone) the ram chips was KM4164B-12 is thi…
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the manual say that ram ic's should be KM4164B ... (not repaired by anyone) the ram chips was KM4164B-12
ram?
something else, ... 48k issue 2 zx with RAM chips IC 6-13< ... to remove all the 48k ram chips? it will not ... -
RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…
... try to diagnostic a probably RAM fault on my +2 grey ... have some new and old RAM ics KM4164B-12 [B]only ... i can identify the faulty RAM ic?
any tips will ... -
+2 grey Contended RAMhi all, i have some quenstions about, contended RAM are banks 1,3,5,7 banks are the pairs of IC's (4164), so 1 pairs = 16k X 4 pairs = 64k this 64…
... quenstions about,
contended RAM are banks 1,3,5 ...
now psysical, contended RAM are the IC's on ... -
another faulty zx spectrum +2 to fix!!!Hello to all, I'm new here... I have got a faulty +2 (gray) and start to try fix it... I have read the treads of xaris_sm and Pluto63 as background…
... ...
Two ram chip (IC28 and IC30) are ... I will to order a replacement for the ZTX650 and ... do some test with the "RAM test ROM"...
ram chips... but with my ... these as temporary replacement for the two dead ram...
ZX81 + 16K RAM PackUp for sale is a ZX81 packaged with power adapter, aerial cable, ear/mic cable and 16K RAM Pack. I hooked it up to the tv and although the power sup…
... , ear/mic cable and 16K RAM Pack.
I hooked ... unable to test the 16K RAM Pack.
ZX81 + Power ... [/IMG]
Complete 16K RAM Pack:
[IMG]http://i629 ...Modern replacement PSU for +3This has probably been beaten to death in earlier threads.. but are there modern sized replacement PSUs for +3 available? My quick search did not res…
... .. but are there modern sized replacement PSUs for +3 available? My ...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 ... seem cool.
The ram fitted is 8322 4116 2N ...4116 Ceramic Ram ChipsHi all, I have a few 4116 Ceramic Ram Chips to sell. If you have any interest, please PM. Greetings, Retrorepair
Hi all,
I have a few 4116 Ceramic Ram Chips to sell.
If you have any interest, please PM.
Greetings,
RetrorepairAnyone got any 4146 RAM chips?Hi I'm looking for some 4164 RAM chips, as would be fitted to a 128k Spectrum (+, +2, +3 I think they all use the same memory). Not out of a 48k mac…
... 'm looking for some 4164 RAM chips, as would be fitted ...lower ram "new" replacement board.[url]http://www.ebay.co.uk/itm/230994088030[/url] I'm sure others have seen it .. but is it "like for like" compared to the original. .with regard …
[url]http://www.ebay.co.uk/itm/230994088030[/url]
I'm sure others have seen it .. but is it "like for like" compared to the original. .with regard timings etc ?quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... an address (if referencing free RAM). Any string names can ... two different segments of free RAM). Although the routine will ... COPY string to RAM or RAM to string or RAM to RAM
GO ... or destin location if in RAM;
b$=source string expression ...MGT Two-Face and DivIDEI've got a [url=http://www.worldofspectrum.org/infoseekid.cgi?id=1000247]MGT Two-Face[/url] that I used to connect to my Spectrum 48K and then a DivI…
... , so I had to get replacement GAL chips.
Since ... other vintage joystick like a RAM Turbo that I spotted on ...TR1 and TR2 replacementCan anyone tell me the correct replacement part for these? This is for an Issue 4S btw
Can anyone tell me the correct replacement part for these? This is for an Issue 4S btwRubber 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…
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I carried out the RAM test I found elsewhere on ...
