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Jetset Willy ATTR Buffer 2Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2? H5C00 D23552. Thanks
Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2?
H5C00 D23552.
Thanks -
Buffer to screen - how much?[FONT=Calibri][SIZE=3]I am starting to build a new game and am researching different ways to accomplish what I need to do. My question is, is it poss…
... possible to copy a back buffer of size 4096 bytes to ... -
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... to see if I understand push and pop when it comes ... />
LD A,5
Push AF
Ld A,7 ...
Push AF
call addfunc
ADD A,B
Push af
ret
Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…
... /> In all routines, the source buffer is linear (not in screen ... /> push hl
push de
push bc
exx
push de
push ...Faster Manic MinerHey, dudes. I've been fiddling around trying to wring more speed out of this game recently. I've replaced the LDIR buffer copying routines with s…
... . I've replaced the LDIR buffer copying routines with some faster ... used a POP-PUSH routine for the pixel buffer and an unrolled ... 512 bytes of the attribute buffer. Ideally, you'd use that ... another reasonable gain over POP-PUSH but the problem of the ...Cool program - buffer delayHere's something fun I wrote tonight thought I'd share. It's essentially a simple buffer delay. A building block for many things. https://www.drop…
Here's something fun I wrote tonight thought I'd share. It's essentially a simple buffer delay. A building block for many things.
https://www.dropbox.com/s/rk4q1xu2k2mkk62/BufferTest.z80ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
... *fp_in,*fp_out;
unsigned char *buffer,*buffer_ss,*buffer_sc,*buffer_sb,*buffer_ns,*buffer_ds ...
} while(zxlayout(buffer,&buffer_ds)-(buffer_ss-buffer)!=0); // moves start of ... to start the copy
push hl ; 11t - store hl for ...Mojon Twins MK2 and lighting effectsDoes anyone have any experience in getting the overlay.h working in the MK2 engine. There were several games written in the churro that used the ove…
... de, 22561
._ovldbl
push bc
; Copy ... ; hl = ovl_y * 4
push hl
add hl, hl ...
; DE -> buffer, HL -> ovl_halo
push hl
add hl, hl ...off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…
... to draw sprites to the buffer?
E. ... screen where you copy your buffer to,
it is ...
if the buffer was copied to the screen ... to draw sprites to the buffer, and then have them ... br /> draw background on buffer (or just clear it)
Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
... some space for shadow screen buffer
20 GO SUB 9000 ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... 1 (edit) clears the input buffer.
I ...
MACRO LD_SCROLL_SRC_DEST
push bc
ld a, (bc ... /> MACRO LD_SCROLL_SRC_DEST_LINE offset
push bc
ld a, (bc ... br /> .nextbyte
push bc
push hl
ld l ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... sprite + mask into a temp buffer.
2b. AND + ... OR from temp buffer to screen.
[/quote]
buffer before copying the buffer (one character cell ... Smith pages, I implemented a "push-many-timer" scroller, great fun ...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 …
Thanks All,
I will modify the code for the faster push pop, move the buffer memory and see what happens.
Many thanksSmooth 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 …
... INITIM2
; Fill Back buffer with a bright stripy pattern ...
PUSH BC
PUSH DE
PUSH IY
PUSH IX
PUSH AF ...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 …
...
PUSH BC
PUSH DE
PUSH IY
PUSH IX
PUSH AF ... you are copying the back buffer in linear order, which means ... a single frame. A back buffer to display copy should do ...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 …
... INITIM2
; Fill Back buffer with a bright stripy pattern ...
PUSH BC
PUSH DE
PUSH IY
PUSH IX
PUSH AF ...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 …
... INITIM2
; Fill Back buffer with a bright stripy pattern ...
PUSH BC
PUSH DE
PUSH IY
PUSH IX
PUSH AF ...T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... code]
start ld hl, buffer alligned on 256
exx ... /> push iy
push ix
push bc
push de
push af ... ;11 next line in back buffer
buffer
128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... the block to the back buffer, then flip.
... db 0
FlipScreen: push af
ld a,(rampage ... pageram
PageRam: push bc
push de
and 7 ...Speccy 128k Double Buffering.If I understand this right, you display either of the screens, and draw to the one that is not being displayed. Am i right in thinking that the Non …
... screen selection code). Copying a buffer to the screen takes a ... this:
[CODE]ld hl, buffer
ld de, window_top_line
[CODE]ld hl, buffer
ld de, window_top_line
push af
push bc
push de
push hl
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... queue. Byte- and word-circular buffer will be added in time ... dishes in a cafeteria; you PUSH a dish on top of ...Loading schemes18 years ago I hated loading schemes like Alcatraz and Speedlock because they were a b*tch to copy and became unreliable when the tape got older. Now…
... be stored in the printer buffer (23296) and has to ... /> ld de,40000
push de
ld hl,$3d00 ... /> ld hl,01343
push hl
in a,($fe ... /> ld de,(dil)
push de
ld b,6 ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... for experimentalists who managed to push the display resolution from the ... you to alternate what screen buffer you were updating and just ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... 's implementation has an unnecessary push/pop in there which really ... copy (for copying a back buffer to the main display) and ... /clear (for zeroing the back buffer to either 0 or some ... possible to fill a back buffer with a static background (not ...Xenon TriOxide (Xeo3)I just wanted you all to know that a new cross platform game has started development (well the +4 version has been around a while, but my colleague f…
... ....
disadvantage of push method is that you need ... .[/b] screen cleared by PUSH, sprites directly into screen ... moved by LDI, clearing buffer by PUSH, no background, no preshifted ... scrolling by different speed, back buffer, masked sprites
[*][b ...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?
... graphics into the frame buffer. If the frame buffer was a simple ... probably end up having to push a value on the stack ... shoudl be in the frame buffer.
