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How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…
... technologies arriving on the ZX Spectrum, I'm beginning to ... and fourth?) Z80 shared our contended memory, then we could "easily" ( ... computational power of the ZX Spectrum. Let me detail the ... CPU1, has access to the contended memory, but only when neither ... -
Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…
... one of the memory chips used for the extended 128K memory. I've ... way to determine if the memory is at fault, and which ... -
Spectrum GamesHi there I've been going through my storage and have come across a box with all my spectrum games in there. I'm keen to sell them and to make sure …
... a box with all my spectrum games in there. I'm ... . It would be hard from memory to give a complete list ... 100+ titles there and the Spectrum 128k unit as well. I am ... -
"Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…
... about memory and the AY chip, but I heard that the Spectrum 128K ... apparently ran faster on a 128K). Yet they all have the ... -
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…
... rely heavily on the Spectrum's ability to switch ... (port 0x7FFD). The original Spectrum 128K memory map (with only one 16K ... Second category of expansion of memory over 128k.
... Third category of expansion of memory over 128k.[/quote]
... -
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…
... Spectrum(issue 4S) which lost it's whole upper memory. ... Willy, Knightlore...with old Spectrum ). So i load it ... have another Spectrum which had also upper memory problems. So ... that i have 16K Spectrum which RAM/ROM ... i plugged in to Spectrum and the command gave ... -
A 30th Anniversary ProjectHappy new year (belatedly...) So with the 30th anniversary approaching, I've decided to do a hardware project to celebrate it. Something hands-on (o…
... a digital circuit - like a Spectrum. (It also creates a ... through an opto-isolator. The Spectrum is electrically obscenely noisy, ... the AY chip in a 128K machine or the beeper circuit ... since the Spectrum's clock output gets halted every time contended memory is ... -
Spectrum 48K - upper memory MIAI have recently acquired a ZX Spectrum which, according to the sticker on the bottom, should be a 48K model. It's an Issue 3 board, with upper memory…
... have recently acquired a ZX Spectrum which, according to the sticker ... Issue 3 board, with upper memory chips (8xTI4532) and supporting logic ... does not see the extended memory. PRINT PEEK 23732 + PEEK 23733 ... -
ZX Spectrum 128k Heatsink RGB behaviourHello, this is George from Greece. I have an 128k+ (Heatsink) and i use the rgb cable i bought from ebay on a 1084st monitor. As the monitor does …
... .
I have an 128k+ (Heatsink) and i use the ... it a problem of the spectrum?
I will test ... -
Looking to buy ZX Spectrum 48k issue 3+, Spectrum + or 128KI am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. T…
I am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. The caveat is that it needs to be shipped to sweden, if you are willing to do this?
/Johan -
Spectrum 128K: distorted picture with composite to vga converterI'm trying to get my 128K Spectrum (toastrack) to work with a vasmon3 composite to vga converter, but all I get is a distorted image on the VGA monit…
... m trying to get my 128K Spectrum (toastrack) to work with a ... The RF output on the 128K is working fine on a ... of the 48K and the 128K with my antique 10MHz ... The output voltage on the 128K is about 4 V DC ... less than 100mV on the 128K and I suspect that ... -
Spectrum 48K - upper memory problemsHi I have a ZX Spectrum 48K issue 3B which does not see upper memory. On PRINT PEEK 23732+256*PEEK 23733 i got result 32767. POKE 32768,85 and PRINT …
Your favourite Spectrum [whatever] beginning with a numberI thought I'd resurrect the fairly popular 'Best Spectrum game beginning with [whatever letter], so here goes. You know the drill, each of your answe…
... the fairly popular 'Best Spectrum game beginning with [whatever ... scene/industry, but not necessarily Spectrum related:
... : 128K of memory.
Best non-Spectrum game ... industry, but not necessarily Spectrum related: 1,000! More ...ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... to revive a dead ZX 128K +2 (the grey one).
128k-spectrum-with-no-display/[/url]
With the spectrum 48K it was possible to ... there an equivalent for the 128K ?
Is there a ...eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... time I've wondered why Spectrum 128K Toastracks were overheating when using ... think the cost is my Spectrum 128K's ULA, and that's ...128k gamesHi. I've come to World of Spectrum for advice. I'm a Commodore guy OK, please be nice to me, as I seek your wisdom! I love the Commodore 128, and I'…
... take advantage of the extra memory and modest extra speed.
Spectrum 128k, in that you had a ... could do with the extra memory to create something special for ... and 128k games to illustrate how developers used the extra memory would ...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…
... the Z80 writes to memory, that write is exposed ... 'd either use a 128K and have it display ... with writing to ULA-contended memory of an external system? ... -time memory writes onto an actual second Spectrum through ... into the uncontended upper memory so it can copy ...Sinclair 128k available?Hello there, Spectrum fans! Let me introduce myself. I am from Russia, my name is Dimitri. In the 90-s I was working for a firm producing ZX Spectru…
... was still missing some Spectrum action and decided to ... treat: I purchased a ZX Spectrum 128k +2b off Ebay. I ... rust/fungus inside and melted memory chips. I have no ... one could do to memory chips to melt them, ... . Meanwhile I got another Spectrum (it hasn't shipped ...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... my grail toaster rack ZX spectrum 128k turned up. I finally found ...[NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…
...
All the officials ZX Spectrum models.
Accuracy< ... in the affected machines (48k / 128k / +2) (Not 100% accurate ... bus’
Emulation of the contended memory timings.
Pixel to ... drives view in the ZX Spectrum +3.
Snapshot’s ...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…
... learn more about the ZX Spectrum.
If I had ... magic wand to remove the memory contention, what software would break ...Spectrum 128k +2 (grey) getting started..So, I just received a grey +2 in the mail. I don't know if it's in working condition, but that doesn't really matter. I opened it up and a small r…
... -content/uploads/2014/05/zx-spectrum-2-grey-audio-input-mod1 ... . Is this enough for the 128k, and is the plug the ...New version emulator ZEsarUX-4.0Hi I have uploaded a new version of my emulator ZEsarUX 4.0. You can download it from the project web page: http://sourceforge.net/projects/…
... , Prism, ZX-Uno and Inves Spectrum+.
Other changes:
Fixed contended memory timings on Spectrum 128k and +2A
Fixed ... to Chris Smith "The ZX Spectrum ULA" book
Fixed cursor ...Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…
... a 48k speccy, so no 128k spec page flipping used here ... particular emulator doesn't handle contended memory correctly, but relative differences are ... /02/how-to-write-zx-spectrum-games-chapter-13/ and mess ... probably not worth the 6x memory.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 ZX Spectrum uses 4116 memory for the lower memory, which can be ... but when searching for 4116 memory, what speed in nano seconds ...
Same for the upper memory:
TMS4532-3 Texas Instruments ... are needed for the ZX Spectrum.
It might ...42 "ZX SPECTRUM 128K AY" GAME MUSIC TUNES - 2.5 HOURS.Well after the positive response I got from my Amiga game music marathon video (https://www.youtube.com/watch?v=6rZ4teNugq8), I knew one day I would …
... I would compose a ZX Spectrum game music video to follow ... here it is, 42 Brilliiant "128k Spectrum" game music tunes,...it was ...ZX Spectrum 128K Toastrack - Quiet AY audio, beeper loudHi, I've got a 128K toastrack Spectrum using a RGB + MIC audio to SCART cable but I'm finding the AY is a lot quieter than the Beeper. Is there an…
Hi,
I've got a 128K toastrack Spectrum using a RGB + MIC audio to SCART cable but I'm finding the AY is a lot quieter than the Beeper. Is there anything I can do?
Many thanks,
RuairiContended 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 ... display on interrupt, as the Spectrum maskable interrupt was generated by ...SpecIde updated!Hi, all! In these past months I've been brushing up a bit my emulator, SpecIde, a.k.a. the least efficient emulator in the world. At this momen…
... , contended memory, floating bus, snow effect...)
- Pixel-perfect emulation of Spectrum 128K/+2 ... . (Also with contended memory, floating bus, snow ...
