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ZX Evolution -- contended memory and raster emulationFresh bleeding update for [url=http://www.nedopc.com/zxevo/zxevo_eng.php]ZX Evolution[/url] [url=https://code.google.com/p/pentevo/source/list]Baseco…
... -- raster and ULA contended memory emulation for original 48k and ... />
1. Contened memory is emulated as described here ... some help with raster/contended memory
Mike & ... valuable insight into contended memory topic and useful discussions.< ... -
DivMMC Enjoy! Works on 3 of 4 48k Speccy's I own?Hey guys. I have a DivMMC Enjoy! Which is absolutely awesome! Love it to bits. It works perfect on three of my 48k Speccy's, but something isn't rig…
... no sign of memory card access - the blue CARD LED doesn't ... -
Playing AY music on the SpeccyCan anyone help with playing AY ripped music on the Speccy? So, let's say I want to play some ripped AY music, such as: [url]ftp://ftp.worldofspect…
...
Name=Trantor The Last Storm Trooper - Title (Beeper)
Stack ... data you should call in memory to init the routine, then ... files I need in Speccy memory (the BIN files), but I ... -
Contended memory and TritoneQuick question regarding contended memory...<div style="font-style: normal;"><br></div><div style="font-style: normal;">I'm testing ideas with Triton…
Quick question regarding contended memory...
I'm testing ideas ... the player code after 0x7fff memory address and the data in ... contended memory, and it doesn't seem ... being run from non contented memory, so I think it actually ... -
Memory testersHi, Just wondering which software people are using to test the memory in their spectrum. I have been using Zorn's memory tester as described here:…
... are using to test the memory in their spectrum. I have ... been using Zorn's memory tester as described here:
48k Memory MapIs there a link or info anywhere that explains the 48k memory layout? My game uses double buffering and I'm trying to decide where the best memor…
Is there a link or info anywhere that explains the 48k memory layout?
My game uses double buffering and I'm trying to decide where the best memory location should be.Sinclair QL bad memoryI googled around trying to see if there was a resource for this but didn't really find anything specific. I have a QL with the white screen proble…
... screen problem which indicates bad memory, so I plopped a Minerva ... you addresses of the bad memory...Problem is that doesn't ... help me identify which IC memory chip it is. Is there ... " a good chip on each memory chip but the only result ...Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... various options for loading from memory card.
What do ... to find their way onto memory card?No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…
... magic wand to remove the memory contention, what software would break ...Storm DesmondAfter the recent storm and flooding in North West England I hope all wossers are safe and sound
After the recent storm and flooding in North West England I hope all wossers are safe and soundSpeccy Games that will be 25 in 2016!Yes, time for the annual list of games turning 25! A lot of Speccy owners would be upgrading to other systems around this time, if not before 1991, …
... collections by Activision
Alien Storm
Autocrash
Back To ... /> 3D Grand Prix
Hawk Storm
Helter Skelter
Hero ... =0&turns=0&memory=0&language=0& ...Rubber foot for grey sprectrum +2 128kLooking for a single round rubber foot for a zx spectrum grey, to complete my restoration project. Not wanting to spend more than £3 or can swap for…
Looking for a single round rubber foot for a zx spectrum grey, to complete my restoration project.
Not wanting to spend more than £3 or can swap for something,
Led torch, usb 4 port hub, memory stick, voltmeter, arduino, etc etcBritsoft - Read-Only Memory Publishing"Britsoft" by Read-Only Memory Publishing is their latest book charting the rise and fall of game development in the UK from the early 80s to the end…
"Britsoft" by Read-Only Memory Publishing is their latest book ...48K Memory MapHi, I'm having some trouble understanding the top of the 48K Memory Map. From reading elsewhere I have this as the memory map: 0 to 16383 - …
... the top of the 48K Memory Map.
From ... /> 0 to 16383 - Read Only Memory
16384 to 22527 - Display ... br /> 23755 to 65367 - Available Memory
65368 to 65535 - User ... area '23755 to 65367 - Available Memory'
Also what ...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…
... ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano seconds ... refreshed, the contents of the memory will get lost? 15ns? ...
Same for the upper memory:
TMS4532-3 Texas Instruments ...Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…
... regulator.
Lower and upper memory modules from... http://zx.zigg ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... command directly to the screen memory.
5 LET a ... into a different part of memory first then dump it to ...Ordered tapes and memory links.I did something a bit sad this evening... In the old days of Spectrum, I used to keep my tapes in those little plastic cases / racks from woolies.…
... , I get a very strong memory of the time and the ... in order to keep the memory link up:
I went ...Contended Memory, literallyDoes anyone else have the sort of memory where they have trouble just picking out info cold? I know we had a discussion about memory sometime last mo…
... else have the sort of memory where they have trouble just ... we had a discussion about memory sometime last month, but...
memory, but my brain wouldn't ... that's it, my association memory is broken. Its all there ...Contended memory article on WikipediaYeah, apparently there's one. https://en.m.wikipedia.org/wiki/ZX_Spectrum_Contended_Memory [quote] However, the ULA must wait for a Z80 read or wr…
... 's clock and access the memory. As the ULA has no ... advance, it relies upon the memory being available to read to ...Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…
... ROM, which failed the upper memory RAM test, suspecting IC25 and ... high to enable the upper memory and under which conditions? Any ...Issue with loading on a +2 (Grey)Hello together, I have a problem with my newly aquired (and first ZX Spectrum + 2 Grey). It isn't possible to load any game at all, because the…
... a RGB connection which is led through a dedicated Sync Stripping ... flawless.
- I did a memory test with the TAP File ...128k memory musingI've been pondering on the 128k memory thing a bit, and it's just bloody stupid. The 64k memory space is divided in four chunks. One is always los…
... pondering on the 128k memory thing a bit, and ... br />
The 64k memory space is divided in four ... no way to page in memory there. Second chunk is ... Third is fixed to usable memory. Fourth is the bankable ... be in the always-resident memory (the fixed 16k + the ...128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... get my head around the memory contention issues of the various ... best use of the extra memory. I've searched the forums ... /> I can understand that the memory is divided up into banks ...Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …
... were to wire an additional memory chip, say a 6264 8Kx8 ... , in parallel with the main memory so that it sits in ... the Z80 reads from main memory, it might be possible to ... reduce the effect of memory contention considerably. Possibly with the ...Testing ram memory of DivIDE / DivMMCHere is new utility for testing DivXXX ram memory: [url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/sof…
Here is new utility for testing DivXXX ram memory:
[url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/software/divramka.zip[/url]Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …
... />
I believe it is memory related but I am at ... chips, placed sockets, inserted new memory chips and the result is ... .
Is this a memory addressing problem? The machine doesn ... 't "see" the memory?
Where should I ...How would I turn memory paging on/off in Assembler?Sorry for the noob question. It's perfectly ok to do OUT 32765,48 in BASIC to turn memory paging off. But how do you do it in assembly language? I kn…
... ,48 in BASIC to turn memory paging off. But how do ...Storm seasons starting earlyHere on the American East Coast we're under attack by a mother of a Nor'easter obviously determined to live up to March's 'comes in like a lion'. I…
... me on my own, last storm I tied a rope from ... , perhaps this is the same storm? They say it will be ...Apollo space craft memory coresI just watched an MIT science report about how the computer equipment for the Apollo space craft were built and tested. https://www.youtube.com/watc…
... with wire acts as a memory store. Is it possible that ...
