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writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... 'll have to start implementing floating bus, flags 3+5 (MemPtr) and others ... -
same game diffrent versionwhich games have diffrent versions of the same game
... -released when Amstrad broke the floating bus.....[/QUOTE]
Yes, I ... -released to work with the +3 / +2a. -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... />
Don't believe the +3 diagnosis, this is because fusetest ... go as well. What about floating bus? Is that known to work ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... . Thus, the CPU clock is 3.575 MHz and there are ... go as well. What about floating bus? Is that known to work ... ?[/QUOTE]
FLoating bus cannot work as there's ... -
Kralizec, a MSX development group, publishes "MajiKazo" for ZX Spectrum[youtube]wJI30FyT7Qw[/youtube] It's a port from a MSX game called [URL="http://www.generation-msx.nl/msxdb/softwareinfo/3449"]MajiKazo[/URL] release…
... Spectrum models except +2A and +3 because [URL="http://members.fortunecity ... /shirka/LIBROS_EBOOKS/MANUAL_ESPECTRUM/floatingbus.html"]floating bus[/URL]. -
What was the best Designed Speccy???So what does the World Of Spectrum think the best Designed Spectrum was? [URL=http://imageshack.us/photo/my-images/845/thespectrums.jpg/][IMG]http:…
... Amstrad made in the +2A/+3. It's a shame about ... been the best since the +3 has the floppy controller :)
floating bus aren't features, they're ... -
Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
... a nice issue 2 Spectrum +3. I'm not sure if ... , is this the issue 2 +3?[/QUOTE]
Both Issue 1 ... games that need the floating bus on your +3 then yes... if not ... -
Use a +2/+3 case as a replacement keyboard for 48KI was just wondering if a 48K Spectrum motherboard could be housed in a +3 case, and somehow the keyboard be connected so that it could have a proper…
... =Alien 8;599801]
The +3 in my experience is notoriously ... is there to do anyway? floating bus "fix"... what else?) -
Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... pair gets put on the bus after an instruction fetch for ... +3 would be immune, since they don't have the whole floating bus ... -
Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... ULA snow will appear. The +3 and +2a do NOT exhibit ... behaviour, EVEN when secaria's floating bus fix is implemented (a resistor ... -
Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... 0x800 + 0x94fc
Machine type: +3
Contention offset: 0x08
Contented IN... passed
Floating bus... skipped (B=0x01)
Contended ... /> [/INDENT]
Is it my +3 a "late timing" exemplar then? -
Kralizec, a MSX development group, publishes "MajiKazo" for ZX Spectrum[youtube]wJI30FyT7Qw[/youtube] It's a port from a MSX game called [URL="http://www.generation-msx.nl/msxdb/softwareinfo/3449"]MajiKazo[/URL] release…
... by Lemonize, which uses the floating bus effect to synchronize with the ... /> Since +3 and +2A models don't have the bus effect, I ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... of the games in list 3 to work? [url]http://www ... some things. Others rely on floating bus, so the D7 resistor mod ... for +2A/+3 could fix some of those ... which work on stock +2A/+3 so I'll end the ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... delay routine. Cobra uses the floating bus reads but it can also ... newly-drawn background.
3. Hope that these graphics routines ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... delay routine. Cobra uses the floating bus reads but it can also ... newly-drawn background.
3. Hope that these graphics routines ... my current understanding of the floating bus :-D
[IMG] ... .com/albums/n608/daveyboyhughes/bus-1.jpg[/IMG] -
Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…
... paging register, probably from the floating bus.[/QUOTE]
OK! Finally ... the bits 0,1,2,3,4 during the whole port ... -
48K/128K classificationI'm sorry if I've looked in the wrong places and not found it, but what are the rules regarding a game being listed as either: ZX Spectrum 48K ZX Sp…
... ROMs)
* requires the floating bus (original release of Arkanoid)
3)
* requires original 128 ... demos)
* requires a 3.5Mhz CPU (border effects timed ... 128 )
* requires a +3/+2A/+2B (border effects timed ... -
Software Projects Anaconda 128k problemTry as i might i cant get further than perhaps a screen before this crashes and resets, anybody else have that problem?
... run unmodified on an unmodified +3/2A. If the 48 version ... rule out the lack of 'floating bus'. Otherwise it's probably doing ... -
"The Amazing Rocketeer", compatible with real hardware?I've managed to create a physical copy for myself of [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0017643"]this game by John Fotou[/URL] bu…
... + (1987?) - fixed HAL as per +3
C) black +2A (1988 ... ) - semi-populated +3 mobo
D) black +2B ... /> If the game requires the floating bus it will only work on ... -
Spectaculator 8 is out!By the looks of it, Jonathon has just release Spectaculator 8. No write up on new features yet. Will have to wait. [url]http://www.spectaculator.co…
... /> Some ZX software support all 3 mouse buttons. Original old Kempston ... bitst D2-D7 are transparent (floating bus). But this original device are ... version of kempston mouse with 3 buttons (also exist next versions ... clones and emulators support also 3 buttons. -
TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... the Z80 clock speed is 3.575611 MHz, so the frame ... IN from an unattached port ('floating bus').
[*] Details on how the ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... the same issues as the +3 with the sound distortion.
floating bus mod for greater software compatablity ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
[QUOTE=1024MAK;718266]I can't think of anything that needs doing for the +2B other than the floating bus mod for greater software compatablity (along with a new pair of ROMs).[/QUOTE]
Could restore the tape input to match the +2A/+3 -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... the same issues as the +3 with the sound distortion.
floating bus mod for greater software compatablity ... sound distortion issue and the floating bus modification or the ROM issue ... -
Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…
... sound distortion issue and the floating bus modification or the ROM issue ... /> +2a board is essentially a +3 board without the FDD controller ... -
ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... /> * That the +2A, +2B and +3 are not compatible with all ... fixable. You can fake the floating bus by adding a resistor and ... /> *That the +2A, +2B and +3 lack some parts causing it ... />
*That +2A, +2B and +3 have different rom paging which ... -
Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
... .ro/html/plus3_hardware.html#inFFport"]floating bus modification[/URL]?
-Stephen ... /ZX_Spectrum_128Ke"]128Ke[/url] which has +3 contention and a floating bus. -
Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…
... "]128Ke[/url] which has +3 contention and a floating bus.[/QUOTE]
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... frame. This is almost 2/3 of the available time in ... you plan to leave the floating bus synchronization in like in the ... from drawing routines, designate 2-3 buffers for 'onscreen objects' (depending ...Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
Using the floating bus, that method won't work on +3/+2A models.
