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A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... only registers and ... ; ---------------------------------------------------------------------
; DRAW using Bresenham's algorithm and ... ---------------------------------------------------------------------
;; DRAW PROCEDURE
PROC
Reading AY registersCan anyone with a real machine confirm or deny the statements referenced in this [url="http://sourceforge.net/tracker/index.php?func=detail&aid=91120…
... the AY-3-8912's registers (and/or for the YM2149 ...Restore Registers Returning to BASICI should really know this, but I've not written code that requires a return to BASIC for a loooong time. What registers need to be preserved / resto…
... loooong time.
What registers need to be preserved / restored ... to restore:
[LIST]
[*]Registers (which ones)?
[*]I register ...Complex DRAW command?After looking at some Speccy code I noticed that the DRAW statement is used to draw lines (or it looked that way). On the Coco, the LINE command was…
... noticed that the DRAW statement is used to draw lines (or it ... command was used to draw lines and the DRAW statement was completely ... position isn't updated after draw)
B = blank (move but ... don't draw)
"U8R8D8L8" would draw a square 8 ...Adventures in Programmable Logic Part 2So, now armed with an Xilinx Parallel III cable, an XC9536 CPLD, a breakout board with power, a JTAG pin header and a 44-pin PLCC socket, I could try…
... :
- contain the memory page registers for the flash ROM, workspace ... like CPLDs, you can just draw a schematic of your logic ...How to read AY Registers from M/C?Gentlemen, I will appreciate if you can provide me some details on this, as I could not find info in other sources. I would like to know if it's pos…
... , and how, to read AY-Registers like the mixer. I tried ...Questions about registers, stack, etc.I was told that if I wanted to export code and create unprotected versions of games I should do the following: 1-Find the starting address by using …
... /> 4-Make a note of registers/stack
5-Create a ...Draw (x1,y1) to (x2, y2)?I was never very good at math. :( Given the above variables, what should I do to draw a line between the two pixels? How do I calculate the values fo…
... , what should I do to draw a line between the two ... I calculate the values for DRAW?
I thought it ... />
PLOT x1,y1
DRAW ????.????
I've seen ...wanna draw zx graphics :)Is anybody looking for a zx graphics ? I would like to help with graphics if there are projects that need it. Here is an example of a sprite (may be …
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…
... temporary byte-sized addresses called 'registers'.
The first register deals ... this chapter we will
- draw our 'car' by changing the ... character square to blue.
- draw our 'road' by using a ... hl,de ;add adds the registers together, so hl points to ...Oooh! Good draw!England has come up trumps with the World Cup 2010 draw. We're in group C, playing against USA, Slovenia and Algeria. I think it's pretty safe to say…
England has come up trumps with the World Cup 2010 draw. We're in group C, playing against USA, Slovenia and Algeria. I think it's pretty safe to say that we won't be knocked out of the 1st round :DHow works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... related to the draw rom subroutine. The Line-Draw require two sets ... show a working example to draw a line in asm ? because ...DRAW x,y,a Algorithm - how does the ROM do it?Hi all, Getting on with SpecOS, and one of the things I would love to do is to preserve the original ROM's behaviour when drawing Arcs. This is don…
... . This is done by using DRAW x,y,a where the ... provide an example of the DRAW command implemented in BASIC - but ... be clear, I can already draw bezier curves (and therefore, so ...Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... the result in DE for draw routine
... br /> ld (hl),a ; ... draw last byte here
scroll_down push hl ; Preserve registers
push de
push ... ,(32859) ; Restore SP & registers then return
...Oceans 'Melbourne Draw+' utility and MOREWas this preserved? I thought I had all my microdrives from Ocean salvaged but I don't seem to remember this being put on WOS? It's Melbourne Draw bu…
... on WOS? It's Melbourne Draw but with stuff bolted on ...Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…
... faster to transfer the registers to the shadow registers rather than using ...Can anyone draw pixels?I'm not sure where is best to post this request, but I would like to know if anyone out there would like to draw some Speccy graphics for me. It's no…
... out there would like to draw some Speccy graphics for me ...Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... do faster ?
Can we draw more patterns at same speed ... />
FOUR
Can we draw more patterns at same speed ... no limit on software emulated registers.
Emulation of PUSH ... things by reserving other hardware registers to common patterns like DE ...melbourne drawIt could be said I am easly pleased,:grin: Very nice peice of software. I was realy impressed by its ease of use. I think a lot of time and effort w…
... if i realy want to draw fancy shapes I can just ... the hobbit graphics to melborne draw. any ideas?
Side ...Rendering clipped glyphSometimes you need to render a glyph of arbitrary size to the screen. And clip it. For example: drawing a mouse cursor means combining drawing of a…
... and make sure you only draw rows of glyph that need ... much shifting as possible inside registers. Use alternate set if needed ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... mode so I can draw sprites for a laff< ... LD L,0
//draw some bytes to the backbuffer ... 37000
//draw some bytes to the backbuffer ... int
push af ; preserve registers.
push bc
push ...Scrolling Bi-Colour Engine for 4-Player GamesJust putting this code up for people to have a look at. Far from finished. Should simply compile and run a bit of a demo. Only good for 128K and +…
... br /> ei
;Draw scoreboards
;----------------
ld a ...
;Draw frame
;----------
draw_char_frame_bc
ret
;Draw character
;--------------
print_char_obj_hl_b_c
draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…
... . I can get it to draw a line ,but it always ...Euro 2016 Draw AKA The 'England Are Gonna Win' ThreadNow I know it's currently the 'in thing' to think the England footie team are overrated, overpaid, uninterested twonks, but thought I'd start a threa…
... start a thread as the draw is at 5.30pm (GMT ...How to draw a picture on ZX Spectrum Basic?How can i draw a picture on ZX Spectrum like this?? http://www.worldofspectrum.org/infoseekid.cgi?id=0026662
How can i draw a picture on ZX Spectrum like this?? http://www.worldofspectrum.org/infoseekid.cgi?id=0026662A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... address. Instead, it uses prime registers, and employs a dirty trick ... ;eight lines of pixels to draw
msl_draw_loop
push ...Restoring AY registersAfter doing (not still finished) the sna to tap converter, I'm going to try to do the same for 128k snapshots. I've got threee ideas about what to do…
... code to restore CPU registers and execute the program ... before restoring CPU registers).
AY registers would be " ... more time passes between registers load and program execution ... notes inmediatly because the registers are loaded; with procedure ...ZEsarUX-7.1Hi! There’s a new stable version of ZEsarUX, version 7.1! The next 24th of September it will be 5 years old :) So this is a special anniversary…
... (&), OR (|), XOR (^) when using registers/variables breakpoints/watches
*Breakpoints ... memory
Improved my Cursor Draw program: now you can use ... bug reading AY registers: unused bits for registers are set to 0 ...WoS Charity draw.As a thank you for everyone donating to WoS last year, I have generated a random set of raffle number for all donations. In a change to the charit…
... /> We will be doing the draw throughout March - later than planned ... be added to the charity draw - lots of prizes on offer ... will add you to the draw.
Good luck everyone ...
