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Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…
Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…
... .
The system clock (3.5MHz) is the best choice ... , it's truly periodic in +2A/3 models. In earlier models, that ...CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…
All 5 are contended (48K/128K ULAs, not for the +2a/+3) with contention based on the address in HL. And there is no write as you say :)
The same goes for the extra 5 for the repeating varieties.CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…
... attention to MREQ) whereas the +2A/+3's does not.CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…
Spectrum +3 Scart and Video CaptureHi all, I have my Spectrum +3 hooked up to my telly via scart. I have a PCI video capture card fitted into my PC and a copy of DScaller (freeware u…
... this mod compatable with the +3 ? It modifies the UHF modulator ... won't work on the +3 (or any 128k model?) because ... /> the section marked ZX Spectrum +2A/+3 VideofixHave 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…
... suite for the 128,+2,+2A,+3 so at least emulation autors ...Codemasters CD Pack CableHi all Does anyone have a spare cable from the the CD game pack codemasters brought out? I got one today but its got the wrong cable with it :( nee…
... CAN DAMAGED spectrum ( specially spectrum +2A/+3)
I study the ... lost a spectrum +2A and I damaged a spectrum +3 :-(
(1-up, 2-down, 3-left, 4-right 6-button ... is VCC. In the spectrum +2A/+3 is signal D3/D4 and ...Modding / repairing a +3I've got a +3 and I'm repairing and enhacing the computer. The enhacements I've done so far: - A slightly buggy video composite output. - Repairing …
... alone and go for the +2A / +3 versions of failing games?[/QUOTE ...Favorite models! :)Hello everyone. This topic has probably been covered before, but I cant be bothered to look back through the archive to check! What is everyones fav…
I always preferred the +2a/+3. Even going so far as ... convert a grey +2 to +2a
This is mainly because ... the sound mod on my +3Mistake 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…
Quicker and easier would be to try reading from the AY [i]data[/i] port. Floating bus => 128K, same as AY [i]register[/i] port => +2A/+3. Might make debugging on some emulators harder though.Vic 20 game better than Speccy version?Years ago, when I had my Vic 20 I had a game called Blitz, it was on the welcome tape in fact. Very simple game, but strangely addictive. For those t…
... of the emulator by over 3%. This might not sound much ... VIC 20 emulator (SAM and +2A/+3) is still much quicker than ...Vic 20 game better than Speccy version?Years ago, when I had my Vic 20 I had a game called Blitz, it was on the welcome tape in fact. Very simple game, but strangely addictive. For those t…
... of the emulator by over 3%. This might not sound much ... VIC 20 emulator (SAM and +2A/+3) is still much quicker than ...Strangely, I just can't STOPOK, I bought an RWAP keyboard matrix and put it in my Spectrum+ last night (ta), I did the Swedish composite mod with a capacitor, I fixed the missin…
... -in tests in the Spectrum +2A/+3. At some point, you are ...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…
there's my flash rom board for the +2a/+3 too (which I still haven't got the boards produced for :() but it has some particular fiddly requirements for it's software, hence the reason the software doesn't work yet either!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…
... flash rom board for the +2a/+3 too (which I still haven ...+3 FaultsI have some Spectrum +3s for testing - looks like they all need drive belts. One will not start up and shows a screen of yellowy green, then one of …
All 128K machines have the colour bar screen which you can access with reset+break; only the +2A/+3 have the full QAZPLM test suite. I agree, it sounds like a stuck contact on the keyboard/membrane causing BREAK to be permanently on.divIDE not working with my Spectrum +2aHi I bought a divIDE 57c and I am told that Fatware is flashed to divIDE. I tried following jumper settings: E E+A A and no jumper at all. When res…
... this:
1) On +2A / +3 models you must connect both ... ) Turn on Spectrum
3) PRESS NMI button
z80 emulator with converter ?Hi i am finding the old z80 emulator v2 or v3, dont remember. Some of these versions have the snapshopt to 1.45 converter that allows us to conver t…
... won't work with a +2A/+3 ROM, so won't work ... I don't have a +3 any longer; this is just ...z80 emulator with converter ?Hi i am finding the old z80 emulator v2 or v3, dont remember. Some of these versions have the snapshopt to 1.45 converter that allows us to conver t…
... dont work in a spectrum +3 ? What other games are in ... =25612&highlight=bombjack+fix]"+2A/+3 compatibility fixes thread!"[/url] for ...Help, How to RGB to VGA Connector on +2A ?Hi, How would I go about converting the RGB output connector from ZX Spectrum +2/A to VGA type of connector. I found this device [url]http://www.am…
... and Din6 for power (in +2A/+3).
BTW... What are ...Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... modified it to work on +2a/+3. It has 512K of flash ...So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... the CPU was running at 3.5MHz. Nevertheless, I have to ... /> My idea, applicable to pre +2A/+3 models, is to have two ...+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…
... bug appear on the Spectrum +2A if I switch to special ... IM1?[/QUOTE]
No. +2A/+3 ula don't snow.Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
... with two modes (traditional and +2A/+3).
- No ULAs (made with ... .
- Cartridge slot.
- A 3.5 inch floppy drive (used ... as +3 drive).
- RS232/gun/centronics ..."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…
A far bigger effect is that the +2A/+3 have less contention than the 48K/128K."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…
... bigger effect is that the +2A/+3 have less contention than the ... .[/QUOTE]
In the +2A/+3 there are less contention situations ..."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…
[QUOTE=Metalbrain;450870]In the +2A/+3 there are less contention situations, ... experiences more contention on a +2A/+3 than a 48K.
2A/+3 than a 48K:
