-
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. …
... :
LD SP, HL
POP AF
EX AF, AF'
POP IY
LD SP, HL; THE SECOND ONE :)
PUSH ... test of adress in HL by BIT x, HL JP Z/NZ ... fast and then
modify hl to next char line
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... ), SP
EX DE, HL
LD SP, HL
EX DE, HL
POP DE
LD (HL ... /> .
restore LD SP, 0
EI
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 …
... /> LD L,A
LD SP,HL
POP IY ;Store address ... /> DEC H
LD A,(HL)
EX AF,AF'
LD ... /> DEC H
LD A,(HL)
EX AF,AF'
LD ... /> DEC H
LD A,(HL)
EX AF,AF'
LD ...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 …
... br /> POP BC
LD SP,HL
PUSH BC
... /> ADD HL,DE ; Add onto GFX
EX DE,HL ; Let ... /> POP BC
LD SP,HL
PUSH BC
...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 …
... /> POP BC
EXX
ex af,af'
POP AF ... br /> POP BC
LD SP,HL
PUSH BC
PUSH ...
add hl,de
EXX
ex af,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 …
... /> ADD HL,DE ; Add onto GFX
EX DE,HL ; Let ... BC
EXX
EX AF,AF'
POP AF ... EXX
LD SP,HL
POP AF
POP ...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 …
... /> ADD HL,DE ; Add onto GFX
EX DE,HL ; Let ... POP BC
EXX
EX AF,AF'
POP AF ... INC H
LD SP,HL
POP AF
POP ...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. …
... skipped first time
fastcopy2 ex af, af'
exx< ... /> push af ;33
ex af, af'
exx
push af ;33
ex af, af'
exx
ld sp, hl ;6
pop ...z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... hl,2
add hl,sp
ld a,(hl) ; a = N
inc hl ...
inc hl
hl)
inc hl
ld b,(hl) ; bc = colours
ex de,hl ; hl ...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…
... sp, hl
ex de, hl
pop hl
ld (memory1), hl
pop hl
ld (memory2), hl
ex ... de, hl
Shoot-em-up Development UpdateHi Folks, I am still working away at my horizontal scroller. Here is a link to let you see progress. I have re-written the scrolling routine to make…
... ]
[FONT=Courier New] LD SP,HL
POP BC: LD ... LD H,A
LD SP,HL
LD H,D: LD ... =Courier New] EX AF,AF'
LD SP,HL[/FONT]
[FONT ...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…
... hl
ld (hl),a : inc hl
ld (hl),a : inc hl
ld (hl ... /> ; hl = 0x4000
; de = bitmap
ld (temp),sp
ld sp,hl ...
ex de,hl
ld c ...Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…
... /> ld e,(hl)
inc hl
ld d,(hl)
ex de,hl
ld e,(hl)
inc hl
ld d,(hl)
ex de,hl
ld sp,hl
adc a,h
ld sp,hl
adc ...IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …
... C,(HL)
INC HL
LD B,(HL)
INC HL
PUSH HL ... br /> ADD HL,HL ;x4
ADD HL,HL ;x8
ADD HL,BC ;add ... /> EX DE,HL ;result back into DE
POP HL
INC HL
reloc1:
LD SP,$0000 ;value gets modified by ...Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... />
[CODE] ld hl, (lines+2)
ld de ... lines
...
ld hl, (lines+382)
ld ... Also we can just make SP=lines and all the scroll ... the registers, like LD HL, 16384: LD DE, ... br /> ld hl, (y_off)
add hl, hl
ex de, hl
...Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…
... ] LD HL,#1303
PUSH HL
LD (#5C3D),SP
LD HL,#1BB0 ...
PUSH HL
LD HL ... /> LD DE,#1B5E
EX DE,HL
LD BC,4
SP & get HL.Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... DI
LD SP,SPADR
LD HL,MSSTR
CALL ... CALL PRNT
REP1 LD HL,MS1K
CALL PRNT< ... (PORT),A
LD HL,MS1K
CALL PRNT
LD HL,MS2K
CALL PRNT
BD EX DE,HL
LD HL,MSBD
CALL PRNT ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... ;Disable Interrupts
LD SP,MyStack ; Move stack to screen ... preserving HL
CALL RAND16
EX DE,HL
POP HL
EX DE,HL
ADD HL,BC ; temporarily use HL register pair ...So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
... HL,14
ADD HL,SP
LD SP,HL ; undo USR command
LD HL ...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…
... />
Assuming HL holds the address of the ... [code]
ld sp, hl
ex de, hl
ld ( ... ), sp
pop de
pop bc
ld (hl), ... /> inc l
ld (hl), b
...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…
... disable interrupts
ld hl,gfx ; hl points to graphics
... br /> ld sp,hl ; SP = Graphics Block
ex de,hl ; hl now has ... a1:
; Store Counter
ex af,af'
;-------------------------------------
; ...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 …
... /> add hl, hl ;
add hl, hl ;
add hl, bc ;
ex de, hl ; character ... push iy
ld (sp_cache),sp
;Pause for ... per row
ld sp,colour_map+(16*pixel_row)+(128* ... pop de
pop hl
ld sp,22552+(32*char_row) ; ...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…
... LD HL,#1303
PUSH HL
LD (#5C3D),SP
LD HL,#1BB0 ...
PUSH HL
LD HL ... /> LD DE,#1B5E
EX DE,HL
LD BC,4
SP & get HL.[/QUOTE]
...+3 how to detect if a file exist ?Need help. I am making a generic menu to my compilations over the spectrum +3. Exist some way programatically to detect if some file exists on the d…
... />
chk: ld hl, 0
add hl, sp ;HL = current stack pointer
ex de, hl ;DE = stack pointer, HL = entry address
add hl, bc ;HL = address of chk
ld sp, hl ;SP now equals ...Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …
... /> LD HL,#1303
PUSH HL
LD (#5C3D),SP
LD HL,#1BB0 ...
PUSH HL
LD HL ... /> LD DE,#1B5E
EX DE,HL
LD BC,4
Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …
... ]LD HL,#1303
PUSH HL
LD (#5C3D),SP
LD HL,#1BB0 ...
PUSH HL
LD HL ... /> LD DE,#1B5E
EX DE,HL
LD BC,4
Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
...
exx
pop hl
ld sp,hl
add a ...
fm01 ex de,hl
ld (hl),e
inc l ... /> ex de,hl
add hl,bc
ex de,hl
ld (hl),e ... /> ld (hl),d
inc hl
ex de,hl
add hl,bc
New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…
... br /> start: di
ld sp,copy_tab ; **MUST RELOCATE**
< ... memory
pop hl
dec sp
pop de< ...
ex de,hl ; HL = 0
add hl,sp ; Point HL to change_tab ... inc hl
ld d,(hl)
inc hl
ld c,(hl) ; ...yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... thread
ld (thread_sp), sp ; store SP, no flags affected; 6 M ... iy ; 3 M-cycles
ex af,af' ; 1 M-cycle ... stack ptr
push hl ; push sp
; hl points to return address ... c,(hl)
inc hl
ld b,(hl)
inc hl
push hl ...Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
... this.
Updating the SP for POP/PUSH can be ... this also.
DE=destination, HL=source.
[code] ld de ... ; 10ts
ld sp, hl ; 6ts
pop bc ; 10ts ... bc ; 10ts
ex de, hl ; 4ts
ld sp, hl ; 6ts
push ...
