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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…
... clocks, and enough fast block RAM to implement an extra memory ... replacement ULA to touch the upper half of the case, and ... -
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. -
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 ... -
Some stupid 16K questions...Starting with... 1. Should a 16K Spectrum that's been upgraded to 48K behave [I]exactly[/I] like a 48K Spectrum? i.e. should the machine test/clear…
... /clear the entire 48K of RAM on start up, and should ... I expect to see the upper 32K RAM on such a machine ... -
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 ... -
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…
... />
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 ... -
Compatible Memory Chips for Issue 2 48K MotherboardHi I was wondering if anybody have a list of manufacturer chips which is compatible with the Issue 2 48K Motherboard, especially the upper 32K RAM.…
... 2 48K Motherboard, especially the upper 32K RAM. According to all the ... that 7 of the 8 RAM chips test faulty. I replaced ... -
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 ... -
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…
... based replacement for the lower RAM that works in all 16K ... the column address to the RAM and so there isn't ... that appear on the lower RAM address lines. In particular, in ... is the ZX Spectrum Lower RAM Replacement Module, pictured below:
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 ...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$=source string expression ...Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…
... />
I carried out the RAM test I found elsewhere on ...Replacement Spectrum +3 RAM ChipsHi all Bought a +3 last week with a RAM issue, so I have removed the old chips, added sockets and now just need a full set of chips to get her back…
... +3 last week with a RAM issue, so I have removed ...DIY Issue 1 Internal 32K RAM expansionFollowing on from the information in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40173"]this[/URL] thread, I finally figured this ou…
... of the Issue 1 internal RAM module.
The pinouts ... when the top 32K of RAM is addressed. Here's a ... the machine saw 48K of RAM, verified with PRINT PEEK 23733 ... machine is seeing 48K of RAM now and that there were ...Buying ram for W7It's been a long time since I bought any ram for a PC (I think I bought a few DIMMs when they first appeared) so I thought I'd ask here to make sure …
... time since I bought any ram for a PC (I think ... /components/memory-pc/ddr2pc2-6400800mhz/ram-804gk.html"]these DDR2 DIMMs ...From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... question is related to "quick RAM copy using LET in Basic ... buffer".
- A zone of RAM with 160 bytes corresponding to ... that stores the v$ dim RAM position.
When ... readed from RAMPEEK v$ dir RAM...
[INDENT]POKE dir,byte ...ZX81 internal RAM upgrade?It's only a matter of time before I kill my ZX81 due to this slack ram pack :( Is there a tutorial available that will allow me to upgrade my RAM to…
It's only a matter of time before I kill my ZX81 due to this slack ram pack :(
Is there a tutorial available that will allow me to upgrade my RAM to 32k or maybe even more?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 it ... 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 ...
