-
LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
...
;; data
push de ; save destination pointer
pop hl ; restore source pointer
.out:
pop de ; restore saved destination
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... /> pop bc
pop af
ld sp,TARGET+4096
push af ...
push bc ... /> pop iy
dest:
ld sp, 0
push iy
push ...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…
... registers.
push bc
push hl
push de
push ix
pop de
pop hl
pop bc
pop af
Troublesome routine, help needed!Having problems with this routine, it basically fires a rocket up the screen, but refuses to detect collisions. I'm using attribute blocks for detect…
... -ords into print string
push bc
call print ;call ... the print routine
pop bc
djnz loop
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 …
... data minus 32
loop push bc
ld b,32 ... pointer
djnz loopa
pop bc
djnz loop
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…
... sla (hl)
BucShift push af
dec hl
jr nz,NoFinAun
pop af
ret
... NoFinAun pop af
rl (hl)< ...harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... is a call, ret, push or pop instruction then this bank would ...Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
"DIGI POP" program: more digital music on ZX48 (no AY!)[img]http://mister_beep.republika.pl/digipop_demo.png[/img] DOWNLOAD: [url]http://mister_beep.republika.pl/Digi_pop.zip[/url] This is a 1-bit / BE…
... that there is too few pop-song
for BEEPER. So ... .2014.
Title: DIGI POP
Music and gfx ...Ghosts n' Goblins loaderI'm trying to put Ghosts n' Goblins onto a +3 disk but struggling to understand the mc loader. Basic loader [code] ink 7 : clear 25000 : load "" cod…
... NC, 65150
65129: PUSH AF
65130: LD ... PUSH BC
65244: PUSH BC
65245: DEC SP
65246: POP ... INC SP
65250: POP BC
65251: ADD ...
65258: PUSH HL
65259: PUSH HL
65260 ... NC, 65395
65372: PUSH AF
65373: LD ...Venturespeak Helplooking at the code from ZX Computing, October, November & December 1986. How do I make the code do more then 3 letters say 5. and could it be made …
... A,032
60141 C5 PUSH BC
60142 D7 RST ... #10
60143 C1 POP BC
60144 05 DEC ... RST #10
60233 D1 POP DE
60234 C9 RET ...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 …
... about using the stack to push and pop stuff to the screen ...
pop af
pop bc
pop de
pop hl
pop ix ... /> pop de
pop hl
ld sp, screen+18
push ... hl
pop ...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 +…
...
push hl
call print_char_obj_hl_b_c
pop hl
pop bc
push hl
push bc
call print_char_obj_hl_b_c
pop bc
pop hl ... /> push bc
push hl
call print_attr_b_c
pop hl
pop bc ...SBC IX,DE/BCAlways wondered why there wasn't a SBC IX, DE/BC command.... so have to use PUSH HL ; save original HL PUSH IX ; IX on stack POP HL ; IX …
... original HL
PUSH IX ; IX on stack
POP HL ; IX ...
PUSH HL ; calc'd value on stack
POP IX ; and ... off again into IX
POP HL ; get original HL back ...understanding machine codeHi Quick question. Am not really sure if it fits development forum as its not really development per se its more a learners question about developm…
... .
[QUOTE]E1 S_PRINT POP HL
7E LD A ... /> 23 INC HL
E5 PUSH HL
A7 AND A ... /> JP 15f2
EXX
PUSH HL
etc
etcCurrah ?Speech channelIt seems to me that it would be nice to be able to send words to the ?Speech with PRINT #5;"Speak English to me, Jimmy" or some such. There really i…
... />
push af ; save
push bc
push de ; the
push hl ... /> done:
pop hl
pop de
pop bc
pop af
z80 commands timeshi! I need site with z80 commands mashine times. I remember, I saw one as table, maybe in .cc domain, but pity forgot link. for example LDI take 16 …
... /> I forgot times for
POP. PUSH, LD SP,nn, and others ...Problem Reading the KeyboardHi Folks, I'm working my way through Toni Baker's rather good book and thought I'd write some code to scan the keyboard and store the results so tha…
... br /> PUSH AF
PUSH BC
PUSH DE
PUSH HL
PUSH HL ;Calculate the keyboard ... segment number
POP HL ;Calculate the keyboard ... /> POP HL
POP DE
POP BC
POP AF ...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…
... to help developing my CGD "Push n Chase" into a good ... become traps which you can push to kill your enemies. If ... to buy the crates (you push money bags against special blocks ... ). Sometimes you are supposed to push blocks to clear the way ...Double Buffer UtilityHi Folks, I've been experimenting with double buffering on a 48k Speccy for a small project I'm working on. After reading lots of good advice here…
... ','POP DE','POP HL']
self.copyPushList = ['PUSH HL','PUSH DE','PUSH BC\nEXX','PUSH IX','PUSH ... HL','PUSH ...Protek Joystick Interface with push buttonI have come across this Protek joystick interface - it does not appear to be their switchable version, but has a push button on the front: [url]http…
Help needed with a bit of code...My minds gone blank again I'm afraid, I'm having trouble with this routine that loads variables into memory then calls the corresponding routine. Th…
... de ???
push af
push de
push bc
caller ... be called
pop bc
pop de
pop af
djnz ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... /> push hl
push de
push bc
call printchar
pop bc ...
pop de ...
pop hl ...ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
I have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger.
However I believe I found a few bugs, some in "zero" application, and some on emulation itself.
The following example ...Mr. Jido makes some noiseA little something to analyse and discuss for you. [code] ORG 60000 ; RND Generator: RND LD HL,EARTH LD A,(WIND) ADD A,L LD …
...
DESTROY PUSH BC
CALL RND
POP BC
DJNZ ...Problem with BC corrupting after DJNZJust for fun, I'm messing around trying to get the level maps from Lemmings to display on the screen with machine code. It's been ages since I did an…
... FOR 8 LINES
LOOP2 PUSH BC ; STORE THE LINE COUNTER ... TO THE NEXT LINE
POP BC ; RETRIEVE THE LINE COUNTER ...Text scroller and custom fontYesterday I was testing this text scroll routine taken from Jonathan Cauldwell's Intro Maker (labels have been inserted to allow partial code relocab…
... at this height
PUSH HL
LD B ... 008
L_35420: PUSH BC
PUSH HL
LD ... /> DJNZ L_35425
POP HL
INC H< ... br /> POP BC
DJNZ L_35420
LD A,(HL)
POP HL
RLCA
...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…
... pop af
pop bc
pop de
exx
pop bc
pop ... 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…
... ever be. I used a POP-PUSH routine for the pixel buffer ... and an unrolled POP HL, LD (nn),HL section ... to stick another enormous unrolled POP HL, LD (nn),HL section ... give another reasonable gain over POP-PUSH but the problem of the ...Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…
... /> #asm
POP HL ; HL = return address
POP DE ; E = y, ... for CALLEE functions)
POP BC ; C = x, ... functions)
PUSH HL ; push return address back ...
