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Is there an emulator that.....?I tried firing up Alien8 yesterday but the wildly variable frame rate is just too much hassle these days. Does there exist an emulator that can adjus…
I would have an emulator allow you to load ( ... directory as a snapshot) an optimisation file which would be ... run as fast as the emulator can handle when the ... them, and not count the T-states.
It would ... these files, which isn't much of a pain, ... -
analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... track of and they don't necessarily stay in the ... none of them will return an error as it's ... new variable, as it won't generate an error. I can only ... which could be done with an interrupt routine I suppose. ... I'm back to using an emulator with a modified ROM ... -
Retrogammer coveranyone seen the cover of this month retrogammer? I'm pretty sure they've done it already? (or are all retrogammers starting to look the same to me?)
... a fire, with an emoji. That doesn't actually mean I ... a fire." It was an expression of my exasperation with ... times on here and writing signing it over?[/quote]< ...
[quote]jon's emulator is excellent, and has a ... I didn't think it was a good emulator why would ... -
Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…
... The 4116 DRAM datasheet states that a memory read should ... its possible values (because for every value of Y coordinate, ... read an attribute from screen RAM. The datasheet states that ... 35 T-states, not couting the RET instruction. Yours last 53 T-states, not ... -
Command and Conquer type game?Hey all One of my all time favourite games although not spectrum based, is the Command and Conquer series. I'm sure many of you are famailiar with…
... , an action game that calls the incremental version only once every 3 ... .png[/IMG]
Except every time you press ENTER, it ... short time (between 11K T-states and 12K T-states) to calculate just a ... this routine takes to solve an entire maze. It's almost ... -
Chuckie Ess 2 tap doesnt work[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000959[/url] It loads, you press a key and it returns to Basic! Anyone any idea why or got a …
... the beginning again.
[*]Don't click on PLAY, press SPACE ... progress causes the ROM to generate an error, which takes the error ... runs the game.
[*]Works every time, as long as the ... TAP file by manually generating an error with the SPACE key ... -
Pixel level collision detection[SIZE=3][FONT=Calibri]I need to do some pixel level collision detection. Assuming I have a byte of my ?player? sprite in DE and a byte of screen to t…
... As this implies checking every byte of the sprite of ... my player with every byte of the sprite ... needed to do this on every vertical retrace, I first ... colission test and save some T-states most of the time :)< ... draws my player and an enemy that collided with ... -
64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…
... second alternative has an overhead of 29 T-states per isolated pixel to ... ,008 T-states to copy the entire attribute buffer to screen every frame ... raster scan.
Finally an even simpler alternative would be ... -
64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…
... character). 65*768*2=99840 t-states.[/QUOTE]
Good ... it will take 99,840 T-states. Therefore copying entire buffer ... br />
Considering an overhead of 29 T-states per pixel, this extra ... on screen one-by-one every frame, corresponding to more ... -
Possible Retro Gamer Interview / articleHi, im looking for some help / information about writing a possible article / interview for retro gamer *looks at merman / Martyn Carroll in parti…
... br /> There used to be an 'Old Skool Games' club in ... Speccys and BBC Micros, every month there was a ... anything interesting. I wouldn't launch into the heavy ... .
Don't get too held up on ... you don't have to worry about writing down everything they ... -
Basic SAVE and ZX Printer supportIs there a list of emulators that support any of these two features (basic SAVE and print to printer port)? Is there a emulator comparison some wh…
... me before :)
NOTE: Another emulator I use, pops up a ... file. i.e. I have an application running (ZEUS), I exit ... following structure:
- PULS 2168 t-states
- DATA bytes: "fillscr" ... 32768,156
- PULS 2168 t-sttes
- DATA 1264 bits ... -
TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…
... ?[/quote]
Televisions don't generally care so long as ... , since standard PAL TV don't do 50hz full frame non ... speccies generate the same signal for every field with just an extended sync ... of the frame. I don't think I've ever heard ... -
TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…
... standard PAL TV don't do 50hz full frame ... 576i, they were getting an effective 288p signal. The ... are actual "pixels" on an analogue display, the only ... speccies generate the same signal for every field with just an extended ... the frame. I don't think I've ever ... -
Best Z80 Assembler for PC?There's probably already a thread for this so if somebody could please point me at it I'd appreciate it. If there isn't then please respond here wit…
... like to see an assembler that has T-State counts but ... zmac could help with measuring T-states in contended memory if the ... cycle counts on every byte rather than every instruction. Right now ... 13 T-states. Arguably t(start+1) should equal t(start) + 4 and t( ... -
Emulator developmentHi, Could anyone explain or direct to a link that explains in not to technical terms how an emulator is developed. It has always blown my mind eve…
... to somewhere else, perform an arithmetic operation on a ... count of how many T-States that instruction and its ... done 69888 T-States (for a 48k Speccy) then you generate an interrupt, ... subtract 69888 from your T-State counter, ... -
The best emulator for the ZX81?Hi everyone, could you please recommend me an emulator for the ZX81 which is good and easy? Thanks!
... consider Fuse the best Spectrum emulator, not ZEsarUX. But I ... than 100) before I release every new stable version (you can ... CHECKLIST)
[quote]From an outsiders perspective I think Cesar ... emulator. Is it bad? I don't think so. Most of the emulator ... -
Manic Miner ported to Atari 800XLYep, they finally ported it :) http://atariage.com/forums/topic/252067-manic-miner-released/
... was, whether it was an XL or an XE or whatever, my ... hardware registers, the display isn't memory mapped.
... and change the palette register every scanline; made even more challenging ... its all down to counting t-states.
Which makes ... -
Some Graphic Coding & Audio help.Hello my fellow WoS'ers I am in the process of writing some code for graphical purposes - I have Z88DK raring to go but I do not know how to take…
... in the process of writing some code for graphical ... fast but you can't randomly free objects as ... about things. I don't think Andy actually posted ... are there any tracker / writing programs for the PC (Win7 ... AY music. It will generate an asm routine that needs ... -
Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... class the z80 optimisations and T-state counting as 'intermediate ... advanced'. Remember, you don't have to learn everything at ... give you an example, for my first ever attempt at writing a ...
- I didn't count T states or use an interrupt routine
- ... -
Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... loop before you worry about T-States.
And a new ... run. But it doesn't take very long before a ... And, believe it or not, writing "bad" code can actually help ... screen is two loops (an X and a Y loop ... "nested loop" solution isn't wasted - nested loops are ... -
How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…
... it does it in 18 t-states. So if I store a ... the drawing area (guarded by an IN detecting sequence of ULA ... game area 4 pixels left every 1/50 seconds. Or the ... . So you need to have an intermediate register A. You need ... -
Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …
... longest route down to 122 t-states, with printing the whole ... get it to under 85 t-states if I store only ... -9 font, and pre-generate the right side with 4 ... ldnext, to get rid of an extra jp.
[code ... printing in two passes. Saving t-states and memory. -
That's my last ZX Spectrum projectHi4all, I want to show my last project: https://www.youtube.com/watch?v=za_p9Mbfu0Y I wish to release a v1.0 very soon! Best regards
... , WxWindows... you needs to program every GUI from the start. I ... a few seconds. Now, isn't possible to load a tape ... because his favourite game isn't here, nor users screaming that ... the mistake of publishing an emulator written in an illegal language (java, from ... -
z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…
... at the t-states
Pushing HL takes 11 t-states whereas
an intelligent order so that ... step you can take when writing asm code is to ... gymnastics or move to an index register to index ... for compilers. To take an example close to home, ... -
Can emulators run 'accelerated' like Spectrum NextI saw a video of the Spectrum Next running games in 'accelerated' mode (7Hz) -- Hard Drivin' was one of the examples. This gave a smoother framerate …
JSpeccy can play the games up to x10 faster, but it meets the Spectrum behaviour, one interrupt every 69888 (or 70908) t-states. Could be possible to generate one int every N frames, but not all games tolerate these behaviour. -
Interrupts, 16k Spectrums and snowI'm writing something for the 16k Spectrum and I want to use interrupts. The avilable documentation doesn't seem clear enough for me to figure out ho…
... do get a decent window every frame when the ULA's ... sides too) where contention isn't an issue.[/quote]
I decided ... fluctuations up to about 12K T states, as well as maybe help ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... rock solid. Sadly, I don't think this sort of magic ... T states vs. 21) yet it’s also rock solid in every emulator I ... bitmap pattern), but it doesn’t. No contention, mind. I’ll ... -
MAME in spectrum emulationHey to all Does anyone use MAME as a emulator port for any Speccy HW? I was so far away from MAME developments I forgot they merged with MESS whic…
... new check is needed on every T-state) it may impact performance ... ). I doubt there are any emulator authors keen to be less ... />
The ULAplus issue is an interesting one. The original spec ... . Is it really wrong of emulator authors not to stick with ... -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
... something. Currently I got my emulator to get exactly [url="https ... they seem to happen three t-states too early... sigh). Also, I ... haven't implemented yet the floating bus ... ...
(Also, I fixed an ugly bug on how I ...
