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+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... set to point to contended memory still occurs, and also appears ... set to point to contended memory.[/quote]
Will the ... , with RAM bank 4 (contended memory) in 0x0000-0x3FFF, and place ... -
z88dk and kempston problemHi, I was working on a new project using z88dk, but when I was testing I found that I got complete strange values if I pressed UP and FIRE simultane…
... on a new project using z88dk, but when I was testing ... at [url]http://z88dk.cvs.sourceforge.net/viewvc/z88dk/z88dk/libsrc/input/spectrum ... -
Embedding external code in Z88DK projects (Beepola related)Hi all, I've been doing a few things in Z88DK, but I was wondering how I could link binary data compiled separately into my projects. Specifically I…
... doing a few things in Z88DK, but I was wondering how ... -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... 0x7FFD). The original Spectrum 128K memory map (with only one ... 0x1FFD on the Pentagon switches memory banks as described in [ ... Second category of expansion of memory over 128k.
... Third category of expansion of memory over 128k.[/quote]
< ... -
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... , this requires several kilobytes of memory - it would be much less ... -
Average PC Memory size increasing by 48K every half hourAs I'm absolutely sure everybody here is aware, Moore's law states that the number of transisters in a device will double on average every 2 years. …
... />
As average memory increases, price per megabyte usually ... fractionally, the amount of memory increased in one year would ... Law.
[*]Daily average memory increase == 901,943,132 / ... For Smartphones, the average memory is around 256MB now (48K ... -
Spectrum lost upper memoryHi again, I have a Rubber key Spectrum(issue 4S) which lost it's whole upper memory. It's worked okay, but i forgot it on over last night. My son wa…
... lost it's whole upper memory. It's worked okay, but ... Spectrum which had also upper memory problems. So i wrote PRINT ... 32767. This mean that upper memory is off. I loaded a ... .
Where is my upper memory? -
Memory upgradeHi! I bought a 16K rubber key Spectrum. It's said in the box and memory test program also said it's 16K machine. Strange thing is that there is yell…
... said in the box and memory test program also said it ... (so no soldering needed) for memory upgrade. There is also 4 ... -
WOS im memory pageThose people in loving memory, why did they die soo young? It makes me a little nervous, is this website cursed? And there is a person there who is l…
Those people in loving memory, why did they die soo young?
It makes me a little nervous, is this website cursed?
And there is a person there who is less than 40, did he die young to? -
Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…
... lost it's whole upper memory. All diagnostic programs says that ... which also have had upper memory problems and the diagnostic programs ... ram. After changing faulty upper memory chips they have worked fine ... you needed to install 8 memory chips and few other chips ... -
48k Out of memoryIv just had a 48k Speccy arrive today. The keyboard wasnt working right so I changed that. Now when I tried to load Cyclone it started to load ok fo…
... that reads 4 out of memory 30:1 I have no ... -
New memory model: 16K/48KAs earlier suggested in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=32096"]this thread[/URL], there was also Spectrum software that …
... />
Today I added this memory model and with your help ... ://www.worldofspectrum.org/infoseekadv.cgi?memory=2&loadpics=1"]This ... -
Loading a screen in to memory...Hi Folks, I want to load a SCREEN$ in to memory and save it out to RAM disk without it being displayed on the screen. I am worried about over writi…
... load a SCREEN$ in to memory and save it out to ... worried about over writing BASIC memory so would the following work ... -
Z88DK tapfile creation questionHere's another question. The game I've just started working on (Sid Spanners 3), I'm concatenating the following tap files together, to make a big ta…
... /> 5. The tapfile created by Z88DK containing the main compiled program ... by the 'appmake' tool of Z88DK in "sidspan3.tap"). It's ... option, so I wonder can Z88DK do something similar? I looked ... -
Testing memory/transistors etc with multimeterAnyone have a rough guide to show how to do this properly? Im using the diode setting on the multimeter to test various components, im touching the b…
... the corner pins on the memory etc, getting some steady readings ... -
contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …
so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct place
can it be altered on the toastrack and grey +2 to match the the +2a/b and +3? -
DIVIDE with 512kB memory upgrade for saleI sell DIVIDE (original version 57c) with my memory upgrade to 512kB ram. [img]http://velesoft.speccy.cz/other/divide512-smallpic.jpg[/img] More in…
... (original version 57c) with my memory upgrade to 512kB ram.
I sell only divide with memory upgrade and plastic case. Not ... -
zx spectrum 48k loading issue (memory problem i think)Hi I have a 48k spectrum that until yesterday was working flawlessly. The spectrum seems to work fine but the problem is with loading games.All the …
... codes like 4 - Out of Memory ; B - Integer out of range ... told that could be a memory problem.
Is there a ... -
What memory pages are being used in a +3DOS disk operation?To make a long story short: what pages are in use by +3DOS while doing read operations from the disk drive? Now, for the details, for those interest…
... block is loaded into main memory, and then, the program starts ... to be loaded in "extended" memory. To avoid side effects, I ... to the end of main memory. A CLEAR 25000 is made ... use nearly all the available memory in all pages) succesfully? Do ... -
Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …
This is external memory upgrade for ZX Spectrum ... upgrade:
+ connect external memory to adress space 32768-65535 ... your ZX Spectrum
+ memory upgrade to 48kB,128kB,512kB ... /> + switch for enable/disable extra memory (128kB / 1MB)
+ possibility ... -
Memory card questionI recently decided to get a new phone (a Vodafone VF543) and i want to upgrade the memory so i can put all my music in it (the internal memory is onl…
... i want to upgrade the memory so i can put all ... music in it (the internal memory is only 50meg) but i ... no idea which type of memory card it will take. I ... -
Calculating free memory...Hi Folks, I am using the following method to calculate the amount of free memory available to BASIC: [CODE]PRINT 65536-USR 7962[/CODE] Is this the…
Hi Folks,
I am using the following method to calculate the amount of free memory available to BASIC:
[CODE]PRINT 65536-USR 7962[/CODE]
Is this the recommended approach?
Many thanks
Paddy -
z88dk + File Handling ProblemHello my fellow WoS'ers I thought I would ask here as I am having a bit of trouble with a very simple C program that I wrote for the spectrum using…
... for the spectrum using the z88dk complier
... /> copy C:\PROGRA~1\z88dk\lib\spec_crt0.opt C:\DOCUME ... -DSCCZ80 -IC:\PROGRA~1\z88dk\include program.c C:\DOCUME ... /> copt C:\PROGRA~1\z88dk\lib\z80rules.2 < ... -Mo -LC:\PROGRA~1\z88dk\lib\clibs -oa.bin - ... -
Crazy Library failure in z88dkHello there my fellow WoS'ers yet another late night problem for the wee small hours I recently managed to get file-handling working very well, t…
... />
File 'C:\PROGR~1\z88dk\lib\clibs/p3.lib', Module ... present.... I have tried uninstalling z88dk and installing it once again ... \\
copy C:\PROGRA~1\z88dk\lib\spec_crt0.opt C:\DOCUME ... -DSCCZ80 -DPLUS3 -IC:\PROGRA~1\z88dk\include program.c C:\DOCUME ... -
z88dk hates me =(Hello there my fellow WoS'ers Under the power of darkness I was about to settle in and play with some SP1 sprite handling (as printf is simply NOT f…
... uninstalling and then re-installings z88dk, rebooted the machine and still ... -
Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
... possibility of paging blocks of memory to and from disk. Imagine ... it 48K, btw?) into 1KB memory blocks.
Each ... OS would attach bitmask of memory blocks that this process uses ... OS would compare process memory bitmask to the memory track from OS ... -
SP1 and memoryWhile developing my program, I've run into memory related issues and haven't (yet) run into any advice over how SP1 uses memory. The examples all sb…
... advice over how SP1 uses memory.
The examples ... some statically defined stuff in memory at some point above ... 50000.
What memory addresses should I avoid when ... br />
Generally, how much memory should I allocate with sbrk ... -
What memory address?If you poke 96 and 236 what would the memory address be? I've forgot how to work it out!!! :-?
If you poke 96 and 236 what would the memory address be?
I've forgot how to work it out!!! :-? -
Why are the same size memory cards different sizes?I've heard before that two memory cards or USB sticks can have the same official capacity, but be different capacities in reality, and I'm not talkin…
... 've heard before that two memory cards or USB sticks can ... the case here) that different memory cards (and USB sticks, though ... , GB, etc) is lower than memory of the supposedly equivalent size ... -
z88dk sticky?I've just tried to PM Alcoholics Anonymous and couldn't because "Alcoholics Anonymous has exceeded their stored private messages quota and cannot acc…
... dumb question here, as the z88dk Wiki isn't very clear ...
