-
my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
... fix it, change LD H,B to LD H,D at line ... ), we could replace LD BC,#0020 with just LD B,#00. Depending ... /> In all, at least 36 bytes could be achieved. -
UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…
... /> ld a,11110000b
ld (16384),a
ld a,11111000b
ld ... (16384+256),a
ld a ... /> It just sets up 8 bytes and writes them to screen ... ;store for later
ld hl,char_rows ;start of character ... -
UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…
... , so this part:
[CODE]ld hl, chars ;start of character ... graphics
ld d,0
ld e,a ;de = character ... :
[CODE]ld de,chars
ld h,0
ld l,a ... smaller and also faster (9 bytes, 15T states). -
my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
... 32857
loop
ld d,a ;based on the ... just 2 (maybe even 1) bytes loaded into the stack.
my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
... code length of 69 bytes was later reduced to 64 ... initial test code intro (57 bytes):
[PHP]mlp:
bytes, JR XXX - 2 bytes, if enough [/PHP ... /> push de
; 3 bytes ld hl, 0,but HL is ... # 5b from 3 to two bytes ----- ld a, h: cp # 5b: ...High Score ASCII array reset ?Hey guys, Noob alert! I'm working on my first game and I'm having problems with the high score on the second time through the game loop. My high …
... would indeed load the six bytes at 'score' with ASCII zeroes ... "000000"
...
ld hl,score
ld b,6
loop ... : ld (hl),"0"
inc ...my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
[PHP] device zxspectrum128
ORG #6000
begin
ld h,#58
bra: rr(hl):inc hl
res 2,h:jr bra
end
display /d,end-begin
savesna "test.sna",begin[/PHP]
9 bytes)
or 8 if use some trickssmooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…
... up more space (85 bytes as to 62).
inc hl
ld bc,5
ldir ... /> djnz NextVar
ld (23653),de ;STKEND
rst $10
ld a,$16 ;AT
...Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... .
The fake instruction LD HL,DE for example, is ... /> LD H,D
LD L,E
which takes 2 bytes and ... 8T. Exactly the same space and time a supposed LD ...Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... Z80 was based on 2 bytes instruction only?[/QUOTE]
LD r1,(IX+r2) etc, or ... , you know, making the regular LD r,(IX+n)'s etc ...Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…
... asm
ld bc,78
ld de,67
ld a,5 ... /> light1:
asm
ld de,888
add hl ... as it saved over 100 bytes!
The reason why ... be else changed to LD BC,0: LD DE,BC by ... at program initialisation as LD DE,@buffer is not ...Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…
...
light1:
asm
ld de,888
add hl ...
candles1:
asm
ld hl,777 ;'Address of Level ... for candles
ld bc,418 ;'Counter for bytes to search in ... /> jr candles2
candlesend:
ld a,e
end asm ...Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…
... :
asm
ld hl,777 ;'Address of Level ...
ld bc,418 ;'Counter for bytes to search ... candles2
candlesend:
ld a,e
end asm ...
ld bc,417 ;'Counter for bytes to search ... It should be 2 bytes shorter and more than ...IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…
... the instruction
ld a,(ix)
... but it likes ld a,(ix+0)[/QUOTE]
ld a,(ix) because there ... />
It is always ld a,(ix+something) even if ... . This instruction takes 3 bytes which are prefix, instruction ...IX register woes - or is SPIN buggy?Or am I missing something? I'm trying to use the IX reg to acess a table containing an x and y coord. My code below just doesnt seem to work proper…
... ]Well, it doesn't like ld a,(ix) because there isn ... :)
It is always ld a,(ix+something) even if ... 0. This instruction takes 3 bytes which are prefix, instruction code ... /> [/QUOTE]
Sorry, but ld a,(ix) is a perfectly ...Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…
... /> -each line is 32 bytes
-each row is ... 8x32 = 256 bytes
-each segment is 8 ... is 3 x 2048= 6144 bytes
-each line ... /> -each segment is 2048 bytes apart, same as 8 high ...
ld d,a ;segments are 8 high bytes apart, so ...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 …
... />
1 - Speed optimized, 185 bytes:
[code]
... ld iyh,b
ld iyl,c
ld h,d
ld ... ap_finishup
ap_getbit: ld a,ixl
ap_getbit2: add ... ret
ap_getgamma: ld bc,1
ap_getgammaloop:call ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
[code]
ld a, (hl)
inc hl < ... *27=6912
ld a,(hl)
adc a ... /> At the cost of 2 bytes: 3,5% speed!Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... /> ; exoopt
ld iy, exo_mapbasebits
ld a, 128
ld b, 52 ... nz, exo_get4bits
ld de, 1
ld ixl, c
... hl
ld hl, 1
defb 210 ;3 bytes nop (JP ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... bc
Ld b,ixh
Ld c,ixl
ld (nn+1), bc
...
nn: ld bc, 0
20 ... +16= 32 and using 7 bytes instead 8.Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... a
ld iyl, a
ld a, 128
ld b, 52 ... hl
ld hl, 1
defb 210 ;3 bytes nop (JP ... exo_getbits_fin1
exo_gb4:
ld a, (hl)
inc hl ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... off 2 screen$ of 13824 bytes. destiny is 42240 (49152-6912 ... the table is only 160 bytes, but in this optimized one ... the table is larger (565 bytes).
Before you call ... , a
ret nz
ld a, (hl)
inc hl ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... /> I'd missed out a "LD A,B" in one place ... calculator version but is 200 bytes bigger again. It was 215 ...Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …
... cost of an extra 10 bytes I'll have a slightly ... Messages
;
.msgprt ld de,$5068 ; screen memory where ... always 16 characters
.msgprc ld a,(hl) ; load character into ... ; transfer remaining pixel rows
ld b,c ; restore character count ...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 …
... for aPLib fast depacker, 197 bytes:
[code]
ld a,(hl)
inc ... jr nz,apnogetbit2
ld a,(hl)
inc ... ld iyh,b
ld iyl,c
ld h,d
ld ...
