-
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... br /> pop bc ; discard scan-loop and
pop bc ; ...
class_5:
pop bc ; discard scan-loop return ... br /> class_2:
pop bc ; discard scan-loop return ... ; evaluate expression
pop af ; unstack system variable ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... org 0x1cf0
c_if:
pop bc ; discard stmt-ret return address ... call each_stmt ; examine statements
pop bc ; unstack end of line pointer ... return:
pop bc ; stmt-ret address to BC
pop hl ; error address ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> fce ; exit calculator
pop bc ; restore arc count
ret ... set
pop bc ; diagonal step to BC'
push bc ; put it ... exx ; alternate register set
pop bc ; horizontal or vertical step to ... -
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…
... />
push af
push bc
push de
push ...
pop hl
pop de
pop bc
pop af
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…
... backbuffer to screen
#asm
LD BC,999
LD ... /> #asm
LD BC,37000
writeagain:
LD (BC),A
INC BC
INC A
screen is overwritten with 'hello'
128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
Yes, but you save the need of an off-screen buffer you have to copy to the screen memory.128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
[QUOTE=na_th_an;734560]Yes, but you save the need of an off-screen buffer you have to copy to the screen memory.[/QUOTE]
oh yeah thats trueDocumentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
...
push af
push bc
push de
push ... /> pop iy
pop ix
pop hl
pop de
pop bc
pop af ...That painter thing..I'm struggling to think of a non clunky way of detecting when a 'box' has been surrounded and can be highlighted, like in the pic: [IMG]http://i1142…
... /> ld bc,32
ex af,af'
pop af ;A ... djnz Loop5
pop hl
ld bc,32
add ... br /> jr nz,Loop4
pop bc
jp NextBox
< ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
Slower but 22 bytes
[CODE] ld hl,51990
ld b,(hl)
ld de,$0020
push de
lp add hl,de
djnz,lp
ld de,udg-32-51990
add hl,de
ld de,55143
pop bc
ldir
ret[/CODE]Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... it for later use in BC
lp add hl,de ... ;
ld de,$D767 ;
pop bc
ldir
ret[/CODE]Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
...
pop af; 2
pop bc; 4
pop de; 6
pop hl ... ; 8
pop ix ...
pop af; 14
pop bc; 16
pop de; 18
pop hl ... ; 20
pop ix ...Clear the screen from assemblerI want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is p…
... I want to clear the screen before I draw my graphic ... similar routine to clear the screen?[/QUOTE]
The quick ... ; top of screen + 1
ld bc 17ffh ; size of screen -1
screen
ldir ; copy (hl)-> ...Clear the screen from assemblerI want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is p…
... ; top of screen + 1
ld bc 17ffh ; size of screen -1
screen
ldir ; copy (hl)-> ... attributes as well just make bc = 1affh
There's ...Clear the screen from assemblerI want to clear the screen before I draw my graphic elements on it. Speed is not important so I was thinking of using the rom CLS option if that is p…
... want to clear the loading screen before my game starts properly ... ; top of screen + 1
ld bc 17ffh ; size of screen -1
screen
ldir ; copy (hl)-> ...Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... ;; get return address
pop bc
pop bc
pop bc
push de ;; put ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... binary number
push bc
exx
pop bc
exx
;rst $10
pop bc ;length of octal number in ... /> inc hl
Next7: pop bc
jr nz,Loop4
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... (I was doing the PUSH/POP BC too often, and going around ... 10s overflows leftwards,
push bc
Loop4: add a,(hl ...
inc hl
Done6: pop bc
ret
[/code]
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... fetch "last value" to BC
;BC=(BINsize)/3 (loop counter)< ...
exx
pop bc
djnz Loop0a
jp ... LoopIX
EndLoop:pop bc
ld a,2
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... br />
pop bc
exx
pop bc
djnz Loop0a< ... LoopIX
EndLoop:pop bc
push de
ld ... ;CHAN_OPEN
pop hl
ld bc,0
ld ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... The Loop5 section from PUSH BC to POP BC becomes:
[code]
push bc
ld b,0 ... LHS of number
pop hl
ex de, ... ;DE=LHS address
pop bc
[/code]array offset (z88dk)Im trying to simulate a 2 dimensional array by using an offset [code] #include <fzx.h> char scr[768]; int arrayoffset(char x,char y) { return (x*…
The macro will work but it's like inlining code -- it will lead to a larger code footprint, which is what slenkar was trying to reduce.
If code footprint is important you can modify the macro to call a function to compute the index instead -- ...What Spectrum projects (Software/Games/Utility)(Hardware)(Others) are you working on?So, basically that :) You dont have to give names or more clues if you dont want to ;) Also, if you are working on more than one, you can tell all of…
... hl
ldir
pop hl
...
pop af
pop bc
pop de
pop hl
...
push hl
push de
push bc ... br />
pop hl
pop bc
pop de
ex ...Isometric GamesAs a longer term project I'm thinking of attempting an isometric game, along the lines of Alien8, but with Magic Knight. No promises though, because …
... that Ultimate redraw the whole screen every frame - that would be ... redraw chunks into a full screen buffer and then copy the changed ... chunks to the main screen.
This would be a ...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... =blue]
ld bc,1024 ;size of 10 ... + 1
push bc
jp FirstDE[/color]< ... /> ld (de),a
pop de
ld ... />
SKIPDE: pop bc
dec bc
ld a,b ...Colission detection problems.G'ah...it's always the same (I've asked before too) - I'm always struggling when it comes to doing box colission checks, so I'm basically hoping you …
... table
DELSHOT PUSH BC
PUSH HL
DEC ...
DEC (HL)
POP HL
POP BC
RET Z
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... of 2nd line on screen display
pop de ; load bomber ... of 10th line on screen display
pop de ; load bomber ... of 16th line on screen display
pop de ; load bomber ...Using the stack to blit bufferI was using a ldir to blit my back buffer to the screen RAM, and it was working pretty well if not rather slow. After reading about using the stack …
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
[QUOTE=joefish;765476]So, your screen buffer is in linear order instead ... of Spectrum screen order? Good move.
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
[QUOTE=joefish;765476]So, your screen buffer is in linear order instead ... of Spectrum screen order? Good move.[/QUOTE]
screen to the display area, while ...
