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128kB software with incorrect memory pagingI search all ZX software using incorrect memory paging via OUT (253),A. This software must write to port data value with D6=1 for compatibility with …
... all ZX software using incorrect memory paging via OUT (253),A ... use on this computers different memory pages. -
Have a real 48k Speccy? yes ? I need your help.Im looking to run this quick test on as many [COLOR="Red"](only)[/COLOR] 48k Spectrums as possible [B][COLOR="Red"]files moved[/COLOR][/B] [URL="ht…
... looking to run this quick test on as many [COLOR="Red ... NOTES: [COLOR="red"]extra components, memory type etc.[/COLOR]
Xpectroid Android ZXSpectrum Emulator TESTI'm working in a port of the iphone iXpectrum emulator, A.K.A GP2Xpectrum to the Android Platform... Since i haven't an android phone yet (i plan to…
... touch control works only to test the emulator (you cant walk ...Test / comments wanted: new composite video output for +2A/+3I've been fiddling with the composite video mods for +2A and +3... with no luck. Because neither desings in [url=http://www.secarica.ro/html/zx_zone.…
... resistors.
Because my test computer may be damaged, I ... mods. It would be interesting test it in a good known ...Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …
... "]On the 128 and +2, memory is entirely controlled by port ... this does not affect the memory between 0x4000 and 0x7fff, which ... />
Bit 5:If set, memory paging will be disabled and ... editor, menu system and self-test program
ROM 1: 128k ...Channel 4 80's Computer Audio TestThis is a channel 4 test broadcast from the 1980's. There definitely is some computer code being put across the airwaves. The video claims that it c…
This is a channel 4 test broadcast from the 1980's. ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]
[quote]Memory banks 1,3,5 and 7 are contended.[/quote]
Really? I thought it was banks 4, 5, 6 and 7 that are contended.Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…
... information available on how the memory within the system is mapped ... , but where does the graphics memory sit, and what is its ... and what size is the memory available to the user etc ...Contention detectionJust a thought, based on discussion elsewhere... Is there any way of telling if reads/writes are being contended around the time that they happen? L…
... if reads/writes are being contended around the time that they ... certain data in the screen memory.
So is there ... answer as to whether the memory is in contention?ZX Spectrum Test UnitHi all, I aquired this as part of a job lot, offering for sale for ?20 + postage (paypal payment only). No idea if it works, but it seems in good c…
... shop built/used it to test Spectrums. It's an interesting ...FLASH EPROM programming on ZX SpectrumThis is photo of Winston's DIAGNOSTIC BOARD: [img]http://velesoft.speccy.cz/other/diagboard.jpg[/img] Schematic and flash utilities: [url]http://www…
... (or equivalent).
I test this chips:
AM29F040B (AMD ... ]http://velesoft.speccy.cz/flash-memory.zip[/url]
[url]http ... is usable also my MB02 memory interface:
[url]http://velesoft ...4164 memoryHi all, I'm looking for 4164 memory, probably 4 chips. If you have some you willing to part with for some cash, let me know how much you want for it…
Hi all,
I'm looking for 4164 memory, probably 4 chips. If you have some you willing to part with for some cash, let me know how much you want for it + postage.
Cheers.memoryprobably a dumb question i have 1gb memory in my PC, if i buy another 1gb memory (the same one i bought before.) and plug it into the other slot, do…
...
i have 1gb memory in my PC, if i ... buy another 1gb memory (the same one i bought ...testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... and the Z80 processor to test if they are faulty?
memory for the 48k and heatsink ...DivIDE with gray +2 LOAD not workingI have 128+2 gray. It has faulty upper memory. PEEK 23733 shows 191. I wanted to use divIDE to load some test programs, but it always hangs when exec…
... gray. It has faulty upper memory.
PEEK 23733 shows 191 ... use divIDE to load some test programs, but
it always ... /> I suspect that not only memory can be faulty but also ...Broken ram or what?Hi! I own ZX Spectrum 48K. When i run command PRINT PEEK 23732 + 256 * PEEK 23733, I should get answer 65535? But i get 49151. In my machine the upp…
... . In my machine the upper memory chips are in sockets so ... /> I also have a test program which can test ram. It also ... if i remove upper memory chips, test program says memory is OK.
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 ...SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…
... go anywhere.
Blocks of memory can be allocated and anything ... version soon for people to test.
D ...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 ...48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... br />
The PEEK test to determine if the machine ... bit of a tangled memory map at a chip ...
... the first test was a bus test, this tells the pseudo ... have an original Sinclair test ROM cart for the ... and buzzed through to test that all the address ...Spectrum Originals for salehi all, ideally i'd like to get rid of the lot in one go.... Standard Cassette Cases All Original tapes with sleeves and instructions 10 Pack Volu…
...
Daley Thompson?s Super-Test 128 Ocean
Dark Star ...
Shadow of the Unicorn (+ memory pack, no instr.) Mikro-Gen ...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 ...Any MCODE programmers fancy a challenge?Hi Folks, I have been using the Micro-Print utility in the archive and found it to be really good. It is the one that provides 32, 36, 42, 51, 64 a…
... be romoved thus saving more memory.
Is there any ... word). This is my small test program below.
[CODE ...Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
... to snapshot the display or memory to disc. I modified ... function to save a memory dump of the Spectrum ... by saving the whole memory map from 0 to ... sourcecode test I typed. I would be examining memory to ... I know the location in memory.
Stay ...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 ...A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... being calculated and written to memory on each pixel PLOT ( ... everything using only registers in memory with a Bresenham's algorithm ... a
bit 2, a ; Test for INVERSE1
jr z ... (hl)
bit 1, c ; Test for OVER
jr z ...
