-
+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 ... then we have uncontended memory "upper" memory with the same logic ...
now psysical, contended RAM are the IC's on ... -
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 ... that appear on the lower RAM address lines. In particular ... 74HC series latch will not work; a 74HCT one ... is the ZX Spectrum Lower RAM Replacement Module, pictured below ... -
Mojon Twins' Covertape #2Ready for TWELVE new games? [b]Sir Ababol 2 Demo[/b] [img]http://www.mojontwins.com/wp-content/uploads/2013/06/01-sir-ababol-demo-2.png[/img] We ar…
... Photoshop) (province of Badajoz). Jos? Ram?n, the nice wizard, decided ... />
Paco?s company has detected an old abandoned ship containing ... under the sun rays. But not for long, remember?
not to get back home until ... -
Anyone 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 ... all use the same memory). Not out of a 48k machine ... -
Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…
... 8kB rom pages + 8kB ram. Interface automatically save data lines ... byte from address #0066. If detected then disable MAGIC button and ... [B][COLOR="Red"]Function is not tested because I don't ... have real MULTIFACE 3. Also not tested in emulators....meantime[/COLOR ... -
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…
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 ... ] will be fine? I may not get them from novatech, but ...so time to leave Windows XP or notSo, I finally decided to buy a SSD and I plan to install it inside my laptop. It is an old laptop, Asus X50N, from 2007, with Nforce 610m, Athlon X2,…
... 610m, Athlon X2, 2 GB RAM. I hope the BIOS recognizes ... SSD and Windows installer does not crash.
I am ... of XP, because XP was not designed specifically for SSD. Well ... here and there... It is not guaranteed that the old hardware ...HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …
... brainstorming about..
Why not using a FPGA/microcontroller with ... respond to any video ram change in the ZX ... No analog circuits, no video ram reading and contention problems.
ram, with HDMI output...
...Simple Question! RAM InterfaceI was messing around on my spectrum yesterday and blew it up! Im sure it has to do with the RAM joystick interface I bought but hadn't tested. Is the…
... has to do with the RAM joystick interface I bought but ... installing it? Should the Spectrum not be booted up with it ...Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
... "safest" address in RAM for such a table?< ... (incl. Speccy) do a RAM test
at startup. ... table before
the RAM test / it will get ... Bummer. What if we replace RAM checking
code with ... 0x11E0 JR NZ,downloop ; if not repeat
; ... loop code ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... with original PSU & 16k RAM pack actually worth here? If ... enjoy it.
If not, it shall be a nice ...For Sale?? Offers? Spectrum ZX81, PSU & 16k RAMHi all I've got a ZX81, 16k RAM pack & original PSU here I purchased sadly it won't work with my TV and I don't want to hack it apart to make compos…
... 've got a ZX81, 16k RAM pack & original PSU here ... I will accept and if not it will look pretty sat ...RAM issue for potential 48k buy?Hi guys I've got a 48k in my sight for ?20 but... it has an issue: [QUOTE]"I tested the computer and only displayed a distorted screen. Coloured …
... . Coloured blocks all over. Could not tested any further from there ... />
Would this be faulty RAM chips? I've seen similar ...Spectrum stuff for sale (ZX81, RAM pack, Tapes... etc)Selling the following: [IMG]http://s26.postimg.org/uk0ntdsq1/IMG_20140902_205737.jpg[/IMG] [IMG]http://s26.postimg.org/ronkmioq1/IMG_20140902_20575…
... original too)
ZX81 16k RAM pack - Working
Spectrum tapes ... machines.
I'm not familiar with the value of ...Early ZX80/81 RAM Pack???Hey all I got given this RAM pack... It doesn't work (i know why now) but compared to my RAM pack this one is really strange... Is this a ZX80 RAM p…
... />
I got given this RAM pack... It doesn't work ... now) but compared to my RAM pack this one is really ... strange... Is this a ZX80 RAM pack or something as it ... ]
Reason it's not working:
[IMG]http ...Interface 1bis RAM Drive modificationAll Interface 1bis users I hope I am not interfering with Dan, but I saw on his site that he has a RAM Drive upgrade/modification for the Interface …
... />
I hope I am not interfering with Dan, but I ... site that he has a RAM Drive upgrade/modification for the ... have an on-board 128K RAM drive, the user must install ...Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…
... and writes directly to RAM, instead of the CPU ... then writing them to RAM). In this case, ... thing with changing the upper 8 bits of the ... flash without requiring nonvolatile RAM (which means you have ... may note I've not mentioned RAM refresh, but that's ...80K RAM UpgradeAn 80K RAM upgrade has been listed on sellmyretro.com (not by me). It is based on the one originally designed by Sandy Electronics and has their p…
An 80K RAM upgrade has been listed on sellmyretro.com (not by me ... /details/NEW-SCT-MODULE-EXPANSION-RAM-80K-FOR--ZX-SPECTRUM-4119 ...Issue 1 16K RAM bankFolks, I recently had a chance to fix a couple of Issue 1 boards, and learned the hard way that the chips in the 16K RAM bank have a different place…
... the chips in the 16K RAM bank have a different placement ... meaningless reports from the Fruitcake RAM tester, I finally checked all ... Issue 1 board layout is not documented anywhere, to the best ... the message board archives does not reveal anything on this subject ...not working issue 3Hi all, I received this mobo from ebay, after start i have this on screen [img]http://forest.no-ip.org/wos/issue3_01/20150728_135908.jpg[/img] …
... ]
initial tests is not good :) I don't have ... have and -5v on lower ram, have only 5v.
I ... i get back 12v but not and this time :) any advices ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... , with 4 of the lower ram chips missing , the video modulator ... a label , and one does not. Really these are quite interesting ... and used until they were not needed . But stuff like this ...48k not startingHi team, I have 2 48k's, one works (Issue 4s), one doesn't (Issue 4a). The non-working one appears to start, but not finish the RAM test. The pape…
... appears to start, but not finish the RAM test. The paper goes ... IC6-13 appear close, but not quite right, some are 0 ... and within tolerance.
RAM chips don't get warm ... ... Is this normal? Unfortunately the RAM chips are soldered directly to ...Turbo RAM Glitch or feature ?I have been testing a Spectrum [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000328"]worldofspectrum.org/infoseekid.cgi?id=1000328"]RAM Tur…
... .org/infoseekid.cgi?id=1000328"]RAM Turbo Interface[/url].
not support striking two keys at ... is in Basic Editor does not support simultaneous keys, but before ...Speed (nano seconds) of memory chips ZX SpectrumThe ZX Spectrum uses 4116 memory for the lower memory, which can be replaced by other sorts or a whole, modern, module, but when searching for 4116 m…
... the refresh rate and if not within 20ns the memory is ... ?
Same for the upper memory:
TMS4532-3 Texas ... PCB) because half of the RAM was faulty, but how many ...Need some help repairing an issue 3 spectrumI am looking for some help repairing an issue 3 speccy, here's what I tried so far. The speccy is not booting up correctly, when using the diagnos…
... not booting up correctly, when using the diagnostic rom all lower ram ... (the ls157's) these were not the cause. Swapped the ULA ... . Upper memory and logic is not installed.
Removed all lower ram ... works expect for the lower ram.Creating a POK from RAM or binary.Don't know if this is the right category or not but here goes. I'm working on a bug fix for a game, it's a few hundred bytes worth of custom code …
... is the right category or not but here goes.
RAM location or a binary? I ... the code later, it's not really the best option.
Z88DK v1.99B ReleasedAt Sourceforge: https://sourceforge.net/projects/z88dk/ It's been a year since the last release so it was time for another. This is another tran…
At Sourceforge:
https://sourceforge.net/projects/z88dk/
It's been a year since the last release so it was time for another. This is another transitional release on the way to version 2.0 and hopefully we'll get there for the next one ...ZX81 Ram pack problemI got recently Sinclair 16k memory expansion for my ZX81, but for some reason it will not work. The computer itself is operating normally without hi…
... for some reason it will not work.
The computer itself ... years.
Of course, maybe ram pack is faulty, but it ...ZX Spectrum+ showing 16K of RAMHello again, as the title says my ZX Spectrum+ is showing only 16K of RAM instead of 48K when running a memory check. [url="http://www.1000bit.it/su…
... + is showing only 16K of RAM instead of 48K when running ... motherboard of a Spectrum+, and not of an original 16K Spectrum ... how to identify the faulty RAM chip, but I seriously have ...
