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ZX Spectrum Light Gun - PROGRAMMINGAmongst some items I recently acquired was some information on the Spectrum Light Gun. Amongst this is a bit of hand-written paper which gives the i…
... you don't rely on timing at all, just light intensity ... if the TV is delaying by a frame or two.[/QUOTE ... lightguns relied on the CRT raster beam timing, but they had more ... hardware inside for timing which the early ones did ... -
Cycle exact emulation?I was just reading the thread about +3 emulation having different results on different emulators, and it made me wonder if any Spectrum emulators hav…
... Einar says, this is caused by early vs late timings. ... the existence of two different timing types, so you can ... of the screen has raster bars in the lower ... was some flicker in those raster line, especially noticeable on ... the semi thread highjack, by the way. -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... . What really matters is the timing between the 50/60 Hz ... of the frame sync interrupt and whether early/late timing issues apply ... TK90X ULA that was made by Fabio Belavenuto, but to avoid ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... /> What really matters is the timing between the 50/60 Hz ... of the frame sync interrupt and whether early/late timing issues apply ... about contention patterns?
By the way, I did some ... had been destroyed, as told by a former Microdigital engineer. I ... -
Circumspect - A Spectrum Emulator for learningThis is a project that I have been playing around with for a while. It must be said, I tend to have problems getting things finished where hobbies a…
... doubt it emulates all the timing faithfully.
Nevertheless I ... that are developed almost exclusively by a small development team, but ... his emulator or an experimental branch, with snapshot features disabled. Another ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... I'm guessing that the timing constants are proportionally different to ... The border colour is controlled by the AND 0x02 at 867B ... loader starts looking for the sync pulses. H therefore governs the ... without
;; an intervening pilot/sync
LD A,0x23
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... somewhere uncontended
;; 47loader by Stephen Williams 2013
;; Released ... ;; L: during search/sync, holds one of the timing constants.
;; During ... ;; a sync consists of a lone zero pulse followed by a
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... pointer
;; 47loader by Stephen Williams 2013
;; Released ... /> ;; HL:during search/sync, the address of the timing
;; constant used ... ;; a sync consists of a lone zero pulse followed by a
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... stands:
[CODE] ;; 47loader by Stephen Williams 2013
;; Released ... /> ;; HL:during search/sync, the address of the timing
;; constant used ... ;; a sync consists of a lone zero pulse followed by a
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ]
Well that proves ROM timing works okay.
[QUOTE ... ]
Bingo. There is a sync sequence (which worked), then load ... address and end address, followed by the raw data. So we ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... do with a NOP besides timing control, branch execution managment... hmmm... examples ... without a user group near by (Yea let me tell you ... the recomendations on compilers/assemblers by the way, I will look ...Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…
... others ... do you calc by head or by routine ???[/QUOTE]
A ... code is to branch, both branches must have identical timing. Anything you ... after each statement with its timing, then note the total after ...What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
...
058F LD-SYNC LD B,+C9 The timing constant.
CALL ... first. This is followed by the data bytes and the ... then signals 'BREAK pressed' by being reset, or 'time- ... up' by being set.
The ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... only. this allowed for tighter timing, as (4) was fairly ... ....
Tilt Demo - Full raster scrolls, bouncing balls, and lissajouz ... & Final Matrix - Search Loader by S Marsden & P Cooke ... Lines 4/5/ MDA Demo by Busy Soft - Crazy Loaders, ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... af' ;'store flag (trapped by emulators)
di ; interrupts ... /> dec b ; reduce by 13 t-states
... br /> ld b, 201 ; timing constant
call ld_edge_1 ; ... ; on sync pulse
ld b, 176 ; timing constant
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... miracle that's being worked by the NIRVANA engine, but one ... delay before raster beam rendering, according to the specific timing characteristics of ... to screen. And replace the raster beam render routine with a ...Space Harrier new loading screenHi, The original screen: [IMG]https://dl.dropboxusercontent.com/u/2616449/spectrum/SpaceHarrier.png[/IMG] and my new version: [IMG]https://dl.dro…
... nobody will be too offended by what I'm about to ... ) but at the expense of raster time (t-states?) so you ... a US setup (obv. the timing would need fixing) , it'd ...+2 Grey Composite question.Hello all, Long time reader first time poster and all that...... Probably a daft question which has been asked hundreds of times, even though I ca…
... televisions had very simple analogue sync separator circuits, and they work ... System has the exact same timing as the 128K Spectrum in ... was really strict about vertical sync pulses it shouldn't display ... is done by the TEA2000 from RGB, bright, and sync wheras on ...Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... registers at just the right raster line to split the display ... write takes place) but the timing is pretty precise so hardware ... could never do two side-by-side.[/quote]
There ...ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…
... the mouse movement by altering the raster settings is working ... will restrict movement by the user defined raster settings, clicking ... the raster size movement confinement by moving the selector by 1x1, ... raster size grid that confines mouse movement is out of sync ...ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…
... character grid with the raster size confined mouse movement ... the alignment of the raster sizes when the user ... the new user defined raster system either... They both ... they sometimes seem out of sync... Not sure why that ... it around, it misaligns by a few pixels and ...ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…
... the character grid with the raster size confined mouse movement
sync... Not sure why that is ... drag it around, it misaligns by a few pixels and doesn ... the interference between both
raster systems will be forgotten.
ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…
... =kgmcneil;794752]- The out of sync drag and highlight area problem ... text, yes, that's right. By fault, a tiny bug came ... not intended to restrict the raster step for overlay movement. This ...Screen buffer Tip from Raff CeccoRaff very kindly gave me this tip: "Incidentally, I remembered a trick I used on the Z80 for extra speed: When clearing the screen buffer, it was a…
... do you read where the raster is so you can do ... is just down to pure timing.
The key trick ... routines so they draw line by line starting at the top ... the start of the frame by enough that you reduce tearing ...
