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Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
... following release. Real contended memory, floating bus and machine-code implementation is around ... -
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…
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. -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... the Kempston interface is disconnected, and I read IN 31 while ... more interfaces then value of floating bus can be unstable !!!
and on bits 5-7 is floating bus. But all ... modern interfaces (and all ZX emulators ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... ; read joystick port
AND 31 ; mask bits 7-5 ... IN 254 ; read keyboard
AND 31 ; mask bits 7-5 ... connected, the floating bus will normally give
(IN 31) AND 31 = ... starting condition:
(IN 31) AND 31 = 16
... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... ; read joystick port
AND 31 ; mask bits 7-5 ... IN 254 ; read keyboard
AND 31 ; mask bits 7-5 ... connected, the floating bus will normally give
(IN 31) AND 31 = ... starting condition:
(IN 31) AND 31 = 16
... -
X128 - moved forward.I don't know if anybody noticed but author of the X128 emulator resumed works on the program: [url]http://www.indigobanquet.adsl24.co.uk/x128wip/x12…
... (no two trains and a bus ride every morning for ... untested and possibly capable of crashing and whatever else), and that ... implementations of some clones and their extended features. ... /> X128 remains full of timing and display inaccuracies, but playing the ... -
Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…
... ]TC2048 has poor kempston port and IORQGE signal implementation. I prefer ... you're referring to the floating bus. That's a bug in ... -
Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…
... spectrum_contend_delay_65432100, contend_delay_common, tape_load_trap and tape_save_trap functions in there as ... then I incorporated the floating bus logic from Fuse, ... spotted the contention_pattern_76543210 and contention_pattern_65432100 tables from Fuse ... -
Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…
Trust me not as I'm not that techy, but I think the +2A and +3 can't use the floating bus trick to know if the ULA is drawing the border or not. That's what made many games such as Arkanoid not work with those models. -
What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... between the 128k and the +2a is the floating bus, and more games ... , Amstrad fixed that "bug" and rendered a whole slew of ... bugs in the ROM, and I'd not recommend it ... want to play both 48k and 128k games. I'd ... a different command syntax) and with quite a lot of ... -
What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... 't run because of the floating bus and that can be bodged up ... is identical to the +3, and the +2B is mostly the ... superior to the Sinclair 128k and the +2. (that's why ... games, cause if *fixes* the floating bus, which is only there because ... -
What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…
... superior to the Sinclair 128k and the +2. (that's ... , cause if *fixes* the floating bus, which is only there because ... port and make a real read from the video data bus, ... D7 of the video RAM and D7 of the auxiliary ( ... D7 of the video RAM and D7 of the auxiliary ( ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... to allow external tape deck and incorporating the internal floppy drive ... have recently read that the floating bus fix means that a DivIDE ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... to allow external tape deck and incorporating the internal floppy ... have recently read that the floating bus fix means that a ... off starting with a +3 and "upgrading" the sound rather ... just involves changing some resistors and stuff. Much simpler than building ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... .speccy.org).
[quote]and incorporating the internal floppy drive ... have recently read that the floating bus fix means that a DivIDE ... off with the original divIDE and Guesser's flash ROM board ... +3E ROMs in one half and double copies of the Spectrum ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... for storage. Supports virtual tapes and virtual disks on modern flash ... storage. Get an original divIDE and avoid divIDE+ like the plague ... been modified to fix the floating bus bug (not by me, previous ... fun topic to discuss though, and it seems to have generated ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... 48K, a 48K Spectrum +, and a Spectrum +3.
and install esxDOS
3) ... ROMs for maximum compatibility and in the other half ... floating bus mod, the joystick port mod, and the expansion bus mod ... titles (CP/M plus and HiSoft BASIC +3), but ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... SE ROMs for maximum compatibility and in the other half ... the floating bus mod, the joystick port mod, and the expansion bus mod.
floating bus mod has been done) would ... problem? What's the expansion bus mod? Also, are there ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... is prone to failure, and because it's a ... DivIDE+ (possibly because the floating bus mod has been done) ... edge connector. The expansion bus mod restores the ROMCS ... ]
Amstrad CPCs and central European speccies use ... works with the Spectrum+ and you sell as a ... -
What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... floating bus mod is done just need to sort the expansion bus and I ... do is add external mike and ear ports so I can ... , but it's more robust and at least it's black ... and now it says Sinclair Research ... -
What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... I test only this version and work correct, no snow:
And need connect on bottom side ... is PLD reprogrammable chip and can correct memory layout ... 7FFD (ZX ignore reading and return floating bus). Ports acceleration can be ... -
What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3
... with fixed internal structure. And need connect on bottom side ... is PLD reprogrammable chip and can correct memory layout ... 7FFD (ZX ignore reading and return floating bus). Ports acceleration can be ... +2A). But some demos and multicolors for ZX128/+2 will ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... again!) to see if the floating bus mod had been done, it ... did notice a few components and short lengths of wire on ... joystick ports. A resistor and some wires and one of those flat ... -
The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…
... again!) to see if the floating bus mod had been done, it ... did notice a few components and short lengths of wire on ... joystick ports. A resistor and some wires and one of those flat ... -
yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... version, including multi-colour support, floating bus and emulation of all Spectrum quirks ... -
Was the +3 a missed opportunity?I just wanted to gauge WOS opinion on this. Do people think that the +3 was a bit of disappointment that didn't really advance the hardware as much a…
... on to your 6th reincarnation and the software base already totals ... cause it used less components and so was cheaper doing it ... of software that use the floating bus either :p -
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 …
... sound correct. Multicolors work incorrect and port FF return value FF ... for many more Speccy clones and peripherals for quite a ... of reads on unattached ports (floating bus/not)
[/LIST]
[*] ... D80 interface in the Kompact, and there's Melodik, but ... -
Kempston mouseOriginal 3 button one in working condition. If you are willing to sell me a one, please contact me. Thanks.
... Original Kempston mouse is rarity and exist too few units. Data ... button port are unusable, return floating bus values (FF or different screen ... of Kempston mouse with better and bug fixed design. Each ... is mouse with three buttons and wheel. Software for three ... -
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 …
... the toastrack/grey +2 RAM contention you've still got all ... contention which the +3 based machines don't have, and a dirty bus ... be done to the toastrack and grey to get similar results ... to fix the I/O contention and the dirty bus? -
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 …
... fix the I/O contention and the dirty bus?[/QUOTE]
I ... I/O contention. You could probably sort out the bus by replacing ...
