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Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... can put lineptrs on a 256-byte boundary and rearrange it into ... 256 low bytes followed by 256 high bytes. This ... /> [code]
ld h,lineptrs / 256
ld l,d
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... DE cause u never cross 256 byte boundary. so INC E/DEC ... /> l1: draw one byte
l2: draw one byte
l3: draw ... one byte
[/code]
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 …
... , only when your crossing a 256 byte boundary: INC L is sufficent ...Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…
... or c ; merge with low byte.
jp nz,scrol0 ; ... 256 times:
scrol0 rl (hl) ; scroll byte ... know exactly where the 256-byte boundaries are within each ... aligned exactly on a 256-byte boundary, so the routine ...Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
... map data is inside a 256 byte boundary. I now set the ... />
ORG 51200 ; MUST BE 256 BOUNDRY
MAPLOOKUP DEFW TILEIMAGE0 ...Help, my Sprite Code wont workI have zipped it all up here: [url="http://www.peargames.co.uk/downloads/galagorf.zip"]http://www.peargames.co.uk/downloads/galagorf.zip[/url] If y…
... screen line as the high byte won't change on a ... wide so it crosses a 256 byte boundary mid line. Try changing ...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…
Move the cosx table to $B800 to leave enough room for the 720-byte sinx table and suddenly a circle appears...Sintech titles no longer denienced!8 years after the initial denience ( June 1998 ), the 3 Ultrasoft titles that [URL="http://www.worldofspectrum.org/infoseekpub.cgi?regexp=Sintech"]Si…
Hi Baze
Thanks for the download! And while I'm at it, thanks for the 256 byte "Tube" intro prog, very impressive! :o
from GuyIn Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…
... 'd just reserve one N-byte long, 256-byte aligned "page", fill it ... /> ld h,PAGE/256
ld l,a ; A = byte
ld ... would just scan the N-byte array, skipping 0s or FFs ...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…
... sorted lie in the same 256-byte page. Are you not? (Better ...Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
... to #EECA because my level table is at #FDDC, seems ok ... 24bytes). I moved the 24 byte level table to #FC00, there is ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... to be aligned on a 256 byte page boundary (so instead of ...Compressors are available for Speccys ?Hi folks, although I was an wasn't strictly a speccy coder in the glory days (amstrad & amiga for the most part), I have secides to arse about with …
... the cost of a whopping 256-byte decompressor routine.Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?
Starting on machine code - BASIC first?Howdy. If I wanted to start learning machine code for the speccy, from scratch, would you recommend I learn BASIC first or is it entirely possible to…
... address is aligned on a 256 byte boundary). Spectrum display file addresses ...another c64 vs. Speccy site...[url]http://c64vsspectrum.com/[/url] 25 years and we are still brawling.. ;)
... " layout of screen memory, eg 256 bytes represent a column - hence ... cell" (fits into the same 256-byte column, as gfx data only ...About Microdrives.I have my three microdrives sitting pretty on m new shelves above my monitor. I have never noticed it before but the tape heads look like stereo one…
... they could synchronize data transfer (256 byte chunks) with the Z80's ...Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…
... crap on the specs page, 256 byte RAM ... they've made a ...Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…
... crap on the specs page, 256 byte RAM ... they've made a ...Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…
... of code (like 1 byte which give no error)
LD L ...Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…
... of code (like 1 byte which give no error)
LD L ...Filmation... how does it work?Does anyone know exactly how Ultimate's Filamtion works? There's an explantion of the room layout and graphics at [url]http://retrospec.sgn.net/users…
... the speccy I used a 256 byte
buffer) in order from ...Game engine design, graphic format?Having never written a game engine before, I'm in need of a little advice on the best way to store the game map. Its 512 x 896 map, 4-way scrolling,…
... 32*56 map, reading each byte of the map and checking ... I'm using a 384 byte lookup table for the screen. Once ...Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
... to a key code (uses table from ZX ROM, but ... you can copy that table to any place, it is ... /> ADD A,#05 ; lower byte of table
LD L,A ; < ... /> LD H,#02 ;higher byte of table (#0205 for now)
...Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
... Decode with the right table and then read SHIFT ... ;OUT:
; B=Hight byte of keyboard port
; A ... ADD A,D ; lower byte of table
LD L,A ; ... LD H,#02 ; higher byte of table (#0205 for now)
...Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
...
;OUT:
; B=Hight byte of keyboard port
; A ... /> ADD A,D ; lower byte of table
LD L,A ;
LD H,$02 ; higher byte of table ($0205 for now)
LD ...Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…
... (hl),c ; setup 257 byte vector table
inc hl
djnz ... />
Beeper: ld hl,(FXPointer) ; table pointer
ld a ...Interrupts - been a while !Not sure if this is the right place for this (1st post on WOS, but been a speccy user since Dec'84 :-o (yes I am that old ! :p) ), But I can't for …
... /> INTTABLE: equ 0xfe00 ; 257 byte vector table
INTVECTOR: equ 0xfdfd ; jp ... (hl),c ; setup 257 byte vector table
inc hl
djnz ...Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....
... the screen was fixed to 256 byte boundaries and the rest is ...So what about ethernet and ZX BASIC?Well, as of about 5 minutes ago, ZX BASIC for the first time properly wrote some packets to the network! OK, so it isn't perhaps 100% what Andrew Ow…
... have used the ready made 256 byte ZX Printer buffer for that ...
