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Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... dealing with this issue? Push and Pop will help I know, but ... -
sdcc inline assembly wtf..So, I'm trying to get division to work. By googling I've found one division algorithm that's quoted in several places, but can't seem to get it to wo…
... /> __asm
pop iy
pop hl
pop bc
push iy
__asm
pop iy
pop hl
pop bc
push iy
Recommend games that don't need the ROM ?I'm looking for a few games that: * Are freely available as .sna files * Do not need the ROM at all * Have motion on screen after snapshot resta…
A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... draw
msl_draw_loop
push bc ;store counter
ld ... , spite data -> HL
pop bc ;restore loop counter
Copying a single character from one place to another?[code] ORG 33000 LD A,8 LD HL,16384 LD BC,256 LD DE, 18432 LOOP: PUSH AF LD A,(HL) LD (DE),A ADD HL, BC POP AF DEC A JR NZ,LOOP REST […
ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
... screen (good for cut scenes, pop ups etc...). It scans the ... to start the copy
push hl ; 11t - store hl for ... /> ;; clean up before loop
pop hl ; 10t - bring back mem ...Mojon Twins MK2 and lighting effectsDoes anyone have any experience in getting the overlay.h working in the MK2 engine. There were several games written in the churro that used the ove…
... de, 22561
._ovldbl
push bc
; Copy ... add hl, bc
pop bc
djnz _ovldbl
pop bc
add hl, bc ... ; hl = ovl_y * 32
pop bc
add hl, bc ...High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... and attributes
PUSH DE ; store the present position ... br /> PUSH AF
RST 16 ; show character
POP AF
RET
PRINT:
PUSH DE ...Flood Fill IssueHi Folks, Came across the following Flood Fill routine by John Metcalf: [code]; scanline fill by John Metcalf ; call with d=x-coord, e=y-coo…
... ,255 60004 2E FF
push hl 60006 E5
rightedge:
pop de 60054 D1
ld ... 60099 C0
pop hl 60100 E1
push de 60101 D5 ...Using BASIC from Machine CodeHi Folks, Came across a very interesting article by Toni Baker in Your Spectrum: http://www.users.globalnet.co.uk/~jg27paw4/yr11/yr11_66.htm …
... />
BASIC
PUSH HL
CALL 5808
POP HL
LD BC, ... LD HL,(23613)
PUSH HL
LD HL, ... PUSH HL
LD (23613),HL
CALL 7050
POP ...
BACK
POP HL
LD (23613),HL ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
...
PUSH AF
PUSH BC
PUSH DE
PUSH HL
POP HL
POP DE
POP BC
POP AF
A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... IX
2$ push bc ;remember counter
ld ... ;table row
pop bc ;restore counter
djnz ... (8372.16 * .002)
push ix ;preserve IX, as the ... 3b5 ;ROM beeper routine
pop ix ;restore IX
Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…
... is the collumn number
push bc
ld bc,32 ...
jr nz,LOOP
pop bc
add hl,bc ...The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…
... /> ret
int_routine
push af
ld a,%01001000 ...
ld ($5800),a
pop af
jp $38
Prportional Ascii text scrollerA couple of years ago I wrote a little scroller that nestles at the top of RAM (FFCA - 65482) and scrolls standard Ascii encoded text from anywhere y…
... ,(hl) ;counter into C
push hl ;save HL
print ... (hl) ;apply (HL)
pop hl ;restore chr set address ...Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... aY)
_drawstringz::
push ix
push iy
ld ix ... /> ld sp, ix
pop iy
pop ix
ret
converting sna to tapsince i'm struggling to find a simple sna to tap converter that works fine on gnu/linux, i'm about starting to code one on my own (using a scripting …
BasinC can accept Intel 8086 assembler inside REM-linesIn the year 1983m the firmware "ACS SOFTWARE" develope basic-spectrum with REM+assembler Finally, here are two sample routines you might like to try…
...
80 REM push hl
90 REM pop bc
100 ... ; assembler;
11 rem: push esi;push edi;
12 rem: mov ... ,edx
22 rem: pop edi;pop esi
23 rem: end ...why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…
... outermost bit = key 1.
push af ; remember the value.
pop af ; restore accumulator.
... , so move right.
pop af ; restore accumulator.
... , so move down.
pop af ; restore accumulator.
...this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …
... outermost bit = key 1.
push af ; remember the value.
pop af ; restore accumulator.
... , so move right.
pop af ; restore accumulator.
... , so move down.
pop af ; restore accumulator.
...type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…
... /> push BC
push DE
push HL
call CLOCK
pop HL ...
pop DE ...
pop BC ...Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
Pity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the ZX Spectrum 48K. It was for a text/graphic adventure I'm working on. The algorithm is based on [url="http ...
