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Optimisation Needed! Is this the Fastest way to copy bytes from screen and back again?I have the screen address (say 0,0 i.e 16384) I want to copy 4 bytes wide by 32 bytes high from the screen to an area of memory. I then want to cop…
... :
di
push iy
; Draw ... ; Copy from store to the screen
ld hl ... 32
lp1:
push hl
ld ... -
Screen LoaderCouple days ago i find very interesting loader routine in ex Yugoslavia magazine "Svet Kompjutera" from january 1987. Authors of article, calls this …
... most impressive.
Uncompressed screen must be at 49152, routine ... /> LD HL,01343
PUSH HL
IN A,(& ... LD (IX+0),L
PUSH AF
RRR CALL RUT ... )
AND C
PUSH AF
LD A,(FL1 ... /> LD (DE),A
PUSH BC
LD BC,32 ... -
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…
... that needs a final push to get done.
screen into character squares, each ... to either the screen or to a buffer in memory. ... from the buffer and scrolls that on the screen.
... library for the strange screen address manipulators seen ... -
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... Pointer:
push af
push bc
push de
push hl
push af
push bc
push de
push hl
push ix
push ... screen
push hl ;Write 8 bytes from registers
push de
push ... -
Real Spectrum screen flicker with SCREEN$I've written a basic loader to simply do a 'load "" screen$' based video from a divide+ however I'm finding the Spectrum can't render a screens and a…
... to simply do a 'load "" screen$' based video from a divide ... not a problem as the screen refresh is instantaneous.
buffer a pre rendered screen$ somehow for copying ... -
42 colums in screen, in anywherethe routine write in anywhere of the screen, it can start to write in 32X24 position and write from it in 42 colums, it is utility to have border wit…
... write in anywhere of the screen, it can start to write ... to 256 character in a buffer
The char set, copy ... coordenates in addres of spectrum screen.
I redesing the article ... -
(part of) screen to UDGHere is a routine to copy a Y,X-position on screen to a UDG. 0<=y<=23 0<=x<=31 144<=udg<=165 (UDG "A" to UDG "U") [code] ; start code with ; PRINT …
Here is a routine to copy a Y,X-position on screen to a UDG.
0 -
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... byte order) buffer at 57484 to the Spectrum screen at
push bc
push de
push hl
... push af
push bc
push de
push hl
push ix
push ... br /> push hl
push de
push bc
push af
Push 'n' ChaseIt is my great pleasure and honor to announce the release of PUSH 'n' CHASE a game made with CGD featuring a wonderful loading and intro screen …
... a wonderful loading and intro screen made by the creator of ... am using the "skip the screen" option to show you all ... . Baddies can push the mines all over the screen and kill you ... Amore
Loading and intro screen, advises, critical suggestions, game testing ...SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
I've been using the SCREEN$() function recently for reading ... data off the screen rather than taking up ... fix for it. Instead of SCREEN$(row,col) use FN ... ;HL=$106E
push hl
push de
push bc
ld ...From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…
... *20) DIM variable for "video buffer".
- A zone of RAM ... v$ string "video buffer" for paint whole level screen.
Works ...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 +…
... /> [CODE]
; Bi-Colour Scrolling-Buffer Game Engine for Four Player ...
;--------------
print_char_obj_hl_b_c
push bc
push hl
call print_attr_b_c ... ;hl = address of attr on screen
ld a,(print_attr_cache)
Developing "Push n Chase" into a good gameI was wondering if anyone would like to help developing my CGD "Push n Chase" into a good game. [url]https://www.youtube.com/watch?v=cdZ5XYbterc[/u…
... help developing my CGD "Push n Chase" into a ... are crates scattered around the screen, if you go over ... traps which you can push to kill your enemies. ... buy the crates (you push money bags against special blocks ... you are supposed to push blocks to clear the way ...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.
ThanksFunction 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
screen address 16386
its ...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…
... routines, the source buffer is linear (not in screen order) and address ... /> push hl
push de
push bc
exx
push de
push ...Printing text using direct screen addressingHaving some problems printing using the FASE engine which is currently defeating me. Hoping to have someone clear out the bit of fog currently dwell…
Having some problems printing using the FASE engine which is currently defeating me. Hoping to have someone clear out the bit of fog currently dwelling in my brain for this function. I'm trying to get the text working properly in 128k mode which uses ...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 ... /> ; base address of the screen
SCRBUF_BASEADDR EQU #4000
MACRO LD_SCROLL_SRC_DEST_LINE offset
push bc
ld a, (bc ... /> .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…
... 2b. AND + OR from temp buffer to screen.
[/quote]
... algorithm draws directly on screen. I eliminated flicker ... buffer before copying the buffer (one character cell) to the display file. Screen ... pages, I implemented a "push-many-timer" scroller, ...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 ... /> ;DOATTR:
; PUSH HL
;
; ; CONVERTS A SCREEN ADDRESS TO AN ...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 ... /> ;DOATTR:
; PUSH HL
;
; ; CONVERTS A SCREEN ADDRESS TO AN ...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 ... /> ;DOATTR:
; PUSH HL
;
; ; CONVERTS A SCREEN ADDRESS TO AN ...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 ... ;11 next line in back buffer
... screen down
ex af, af'
exx
push iy
push ... ;11 next line in back 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.
push af
ld a,(rampage)
xor 8 ; flip screen ... call PageRam ; effects the flipped screen
ld a ...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 …
... some simple screen selection code). Copying a buffer to the screen takes a ... , screenptr
push af
push bc
push de
push hl
push af
push bc
push de
push hl
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…
... screen. The message must be stored in the printer buffer ... ld de,40000
push de
ld hl,$3d00 ... ld hl,01343
push hl
in a,($fe ... ld de,(dil)
push de
ld b,6 ...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…
... E.[/b] screen cleared by PUSH, sprites directly into screen by OR, ... backbuffer moved by LDI, clearing buffer by PUSH, no background, no preshifted ... added by OR directly into screen, 24*16
[*][ ... Dragon[/b] background pushed on screen
[*][b]North Star ...
