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Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... : That adjustment saved me 9984 t-states approx, :D -
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…
... you saying there were less T-States (and was surprised) and was ... -
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…
... Majikazo), and under around 5000 t-states.[/QUOTE]
You're ... -
Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?
... , it means counting bytes and T-states. But in very large corporate ... -
ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... time.
I also don't like annoying dialogs... :-) I ... B or so have 4 T-States, while LD B,(HL) ... ability to list the T-States of each line in ... and graphics drivers :-) the T-State calculation will be important ... to put in all those t-states, but this has to be ... -
ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... understand you right about the T-State calculation...
< ... the total amount of T-States while running the machine ... . My now implemented T-State display may be ... impossible to calculate the T-States of a code ... DIS has two different T-States depending on the ... -
ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... taken?[/b] and adjust the t-state total accordingly.[/QUOTE]
T-State counting in loops).
Now, opcodes with different T-States are shown as e.g ... -
Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
Provided the Pixel Address Table is aligned to an even byte ($00, $02 etc) then 2 t-states can be saved thus, correct?
[CODE]LD E,(HL)
INC HL change to INC L
LD D,(HL)[/CODE] -
Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
Provided the Pixel Address Table is aligned to an even byte ($00, $02 etc) then 2 t-states can be saved thus, correct?
[CODE]
LD E,(HL)
INC HL change to INC L
LD D,(HL)[/CODE] -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... 21 t-states
cp #0 ; 7 t-states
dec a ; 4 t-states
nop ; 4 t-states
nop ; 4 t-states ... /> ld a,e ; 4 t-states
cpl ; 4 t-states
ld (hl ... -
ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... is: I cannot count the t-states in such cases - except if ... emulator. An emulator can calculate t-states easily.
Besides of ... -
Show some love for the Magnum Light GunI remember the reviews were mixed, but in hindsight I suspect the negativity was a result of the quality of some of those initial six games. I recal…
... the /CLK signal during wait states, of course).
This ... trigger is pressed, how many T-states have passed since the last ... patching for use there wouldn't be a huge amount of ... -
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…
... them, and not count the T-states.
It would require ... creating these files, which isn't much of a pain, but ... -
Is this really too much to bloody askCall me picky, but one of the things that really pisses me off when I buy a speccy game off eBay is when it arrives, you open the case and see that t…
... .. turns up buyer didn't know 48k mode to run older games ... -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... )
out (RS232_CTL),a ; 11 t-states
start_bit:
;; get ... -
Issue 3B no soundI just noticed that there's no sound in the Issue 3B Speccy that I've been fixing. Is it more likely that the speaker is bust or is it TR7 and D9? …
... .worldofspectrum.org/forums/showthread.php?t=47100"]48k no beeper sound[/URL ... .worldofspectrum.org/forums/showthread.php?t=47370"]48k no beeper sound (again ... .worldofspectrum.org/forums/showthread.php?t=47726"]VERY loud beeper!![/URL ... -
Toastrack refurbishmentYesterday I opened a drawer in my old desk and discovered 2 complete toastrack 128s and a board only for the same. As I already have a fully working…
... . I knew it wasn't a 48k and from experience could see ... an ordinary 48k+ case (which it did). I can't remember what ... 128+ models and a +2. 48k+ cases are fairly easy to ... -
Skooldaze and Back to Skool loading problemsIve got both of these on original Microsphere release and Ive never come across two titles that are so azimuth reliant before!! I mean it has to be …
... routine times bits at 855 T states for a 0, and 1710T ... -
Top 10 tape-based 128K-only games of all timeOn foro.speccy.org we came up with this list: La Abadia del Crimen Los Amores de Brunilda Carrier Command Gauntlet 3 The Muncher Pang The Pawn Rod-…
... to shave off a few T-states isn't my idea of fun ... -
Top 10 tape-based 128K-only games of all timeOn foro.speccy.org we came up with this list: La Abadia del Crimen Los Amores de Brunilda Carrier Command Gauntlet 3 The Muncher Pang The Pawn Rod-…
... to shave off a few T-states isn't my idea of fun ... it. I've tinkered with T-states for the purpose of visual ... -
Your Spectrum RegretsSpeccy things that you have done (or haven't done) and have regretted them since. Here's mine... (in no particular order). 1) Sold my Spectrum 128K…
oh don't get me started....
... came out (you couldn't buy 48k's...sold out)...gone???
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…
... game will have about 15K T-states available per frame, so
your game won't need to spend time with ... will save about 1.8K T-states. For instance, reducing 4
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.…
... point. The 4116 DRAM datasheet states that a memory read should ... from screen RAM. The datasheet states that the 4164-2 DRAM ... /> 35 T-states, not couting the RET instruction. Yours last 53 T-states, not ... lines, circles, etc you won't be calculating a new plot ...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…
... can be sure you didn't screw up on any map ... frames, spend only about 10K T-states each time, and still get ... change really, I just didn't have time to include it ...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…
... short time (between 11K T-states and 12K T-states) to calculate just a ... and number of goals don't make much difference for how ...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…
... of specifics that I don't remember about that scrolling routine ... complete sense, and I don't remember what I did with ... quite unusual as it didn't use any kind of back ... interrupt.
- Wait enough t-states so the raster has moved ...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…
... and you know how many t-states it takes per line. Everything ...
