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Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... IF FLAG IS 1, FAST COPY BUFFER TO SCREEN
NEXT LINE
INC B
... INC H ; *256 TO GET NEXT LINE
INC B
... INC H ; *256 TO GET NEXT LINE
INC B
... -
Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
...
It is very fast (As I am overwriting the ... INC H ; *256 to get next line
LD A,(DE)
next line
LD A,(DE)
next line
LD A,(DE)
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... INC H ; *256 TO GET NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... our machine code at free, fast-running (over 32768) and memorable ... to left verge on next line'
Insert line 16, 'add hl,de ... to 0 in the next line.
Change line 20 'ld bc, 0 ... our blindingly fast machine code.
Insert the following into line 106 ...Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…
... to get from one line to the next below it?
next line[/I]" than this, because if ...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…
... left then you move every line left and draw entire column ... 'd be adding 256 for next line. And when you're done ...Problem with rotating procedureHi folks! I wrote a proc in z80 asm, based on: x' = x * cos (z) - y * sin (z) y' = x * sin (z) + y * cos (z) I used a precalculated table of sin a…
... mind.
*nice example of fast game is Dark star. Math ... ]
;draw routine
compute next line point
call put_pixel
do again until end of line reached
[/code]
... drawing a line, you already have an adress. the next point will ...Pimp my code...Erm, this is just the result of a mental exercise - I wanted to repeatedly display a UDG but decided against using a ROM routine and UDGs! Any sugges…
... could do it super-duper-fast by using the stack.
line of your UDG into D ... 1024 times, load up the next line up of your UDG into ... , and so on.
Very fast.
But fairly useless.Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... new address (one line down) is very fast just 10T cycles.< ... HL next line
LD (HL),B
...
POP HL next line< ...
POP HL 1st line
- draw line here -
POP HL ... 2nd line
- draw line here -
POP HL ...Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... new address (one line down) is very fast just 10T cycles.
POP HL first line
LD (HL),C some ... HL next line
LD (HL),B
...
POP HL next line
line", you still have to add ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... "disp".
The next line colours the character square on ... advances to the next scan line in the next line by adding 256 ... />
[code]
// get next line in string
++prow ... to do it a fast way where if there ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... call the instruction on the next line.
This cause me ... different sayings flash by really fast untill the desired on is ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... call the instruction on the next line.
This cause ... different sayings flash by really fast untill the desired on is ... of statement numbers within the line. However, people have wrote ... LET statement just before the NEXT statement is another handy ...Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…
... loop code and the get next line code but that's small ... only just use this to fast draw the most common couple ...Zon xDid anyone ever use a ZON X sound generator? I've been rummaging around in the loft and found it (along with Machine Language for the absolute beginn…
... little about the ZX81 - but FAST mode was what? Processing with ... hit the end of the line, which was signalled by a ... make it wait for the next line). That meant it could only ... turning off the screen display (FAST mode), you'd get more ...Jonathan Cauldwell writes.I also found this in me old archives, which was actually written by Jonathan Cauldwell. Again, typos and editorial tags included for authenticity ;-)…
... screen has to be as fast as possible, so tricks are ... routine works by moving a line of pixels to the screen ... a time, moving to the next line down, counting how many lines ...Compiling Basic to MCHello, I have a lot of long Basic programs. These are mostly strategy programs, good but slow. I was thinking about how to speed them up without com…
... LET y1 = 0: REM line start
30 LET c ... (RND * 176): REM Random line end
50 DRAW INK ... : LET y1 = y2: REM Next line starts at current one's ... b]END IF[/b]: REM Next color
80 IF ... almost the same program. Line 6 might be removed, ... BASIC is "too fast")Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... this is for dumping a line, but you have to actualize ... and for POPs, for the next line and you have to calculate ... ]
The 'REPT 160' line is a Pasmo macro to ... SP values calculated for each line. The output code is about ... much shorter and still quite fast.GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... making the window manager look fast in comparison :)[/QUOTE]
next line and shifting 5 times left ... to random line.
2) In addition ...Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... our machine code at free, fast-running (over 32768) and memorable ... to left verge on next line'
Insert line 16, 'add hl,de ... to 0 in the next line.
Change line 20 'ld bc, 0 ... our blindingly fast machine code.
Insert the following into line 106 ...BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... editor, to maintain the Screen Line Edit Buffer and associated variables ... 7, which entailed printing each line as it was being processed ... zip up the screen too fast to check visually it serves ... the middle of a line, then inserting the next line won't work ...Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... C, from row top HL, fast enough.
[ ... push hl ;keep start of line
xor a ;same ... ;32 bytes to delete per line
loop1: ld ( ... /> inc l ;fill one line with zeroes
djnz ... to start of line
inc h ;next line down within a ...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…
... /> - Previous line right white border
- Line #3 Horizontal Sync ... top border.
- Line #58 Horizontal Sync ("black ... pixel area line, with white pixels,
- Next line information follows ... border again, and fast forwarding to PAL line #243, we ...Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... original 128K machine (a fast arpeggio line seems to sound louder in ... of port $7FFD, but the next frame following that. I don ... changed, but also on the next frame following the change. So ...2x2 tile to attribute blocksHow do you go about converting a 2x2 tile to 16 x 16 attributes? Heres an example of the tile data I'm wanting to enlarge. [code] defb 255, 25…
... 16 characters to the next line, 4 chars in
next square
RLA ; ... worth it as it is fast enough.
;-End-------------------------------------< ...2x2 tile to attribute blocksHow do you go about converting a 2x2 tile to 16 x 16 attributes? Heres an example of the tile data I'm wanting to enlarge. [code] defb 255, 25…
... 16 characters to the next line, 4 chars in< ... 24 characters to the next line, 4 chars in< ... INC HL ; move to next square
RLA ; ... worth it as it is fast enough.
;-End ...Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…
... it can print to the next line down. Removing the need to ... return. Interesting to see how fast it gets!
I ...Go to, gosub or something different?I'm going to write an arcade game in basic. May compile it. In both basic and compiled basic would a goto or gosub be faster? Also if I stored …
... it needs to do in-line, one thing after another, ... .
Your first line might be a GOTO or ... loop starts on the very next line. Or you could just jump ... make it start at any line you like.
... it's not running as fast as it could.
< ...Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…
... program scrolling the screen that fast!
I did write a ... its own 'skip character' and 'next line' control codes. It works by ...
