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Rainbow Python (with code length less than 150 bytes).[url="http://zx-pk.ru/attachment.php?attachmentid=64971&d=1523562006"]Original with 93 bytes of main code.[/url] ([url="http://zx-pk.ru/threads/290…
... ;d=1523562006"]Original with 93 bytes of main code.[/url] ([url ... modification 1 (without texture, 145 bytes of main code).[/url]
bytes of main code).[/url]
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…
... and squeezed to just 54 bytes.
The ... br /> print:
ld de,08000h ;current text stream ... scroll
ld (hl),b ;reset counter
ld b,20h ;ld b,20h = ...ZY10, a tool to store and display some small bitmapped imagesZY10 Builder ============ Download at: https://www.sendspace.com/file/rncgbo ZY10 is a file format/tool to store some small images on the Spec…
... .bin file of exactly 16384 bytes.
(I might add ...
0 - 4 Bytes - 'ZY10'
4 - 252 Bytes - Assembly code to ...
* or in assembly:
ld a,
call 49158
bytes (16*8*8 pixel data ...[Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…
... required, saving 466 bytes. $5CD2 = 23762.
ld a,BORDER_BLACK ; Select ... backwards. Attributes RAM = 768 bytes.
cls_attributes_loop:
ld (de),a ; Put ... . Screen RAM = 6144 bytes.
cls_screen_loop:
ld (de),a ; Put ...Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... all 8 bytes of a glyph at once.
ld l, ( ... /> ; Find glyph's width
ld a, #((_propfont_width - 0x0020))
adc ... #0x00
ld h, a
ld a, (hl)
ld e, a ...
prewidthloop:
ld a, d
; Loop for ...Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …
...
ld hl,$a06c
ld de,$fffb
ld bc,$0064 ... attempts to copy 100 bytes, attempting to write to ... the first 95 bytes of ROM too, as ... keys collected:
ld a,$11
rst $ ...
pop de
ld d,b
di
A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…
... that holds all the required bytes)
...instead of...
1 ... program from the +2 manual (ld bc,99 / ret) which has ...Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
... /> ld de, gfx0
ld b, 8
loop: ld a, (de)
ld ...
ld hl, $50a0
ld de, gfx1
ld b, 8 ...
loop2: ld a, (de)
ld ... and quicker way of mirroring bytes?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 ...Remainder (Mod) calculationsI've been figuring out how to calculate remainders after integer division by a constant divisor k (A mod k = A % k). I found that for most small di…
... is from 23 bytes (ModDiv9) to 25 bytes (ModDiv11).
... , 16 bytes, 61cc[/b]
[code]Mod3 ld c, ... , 14 bytes, 54cc[/b]
[code]Mod5 ld c, ... 6, 20 bytes, 77cc[/b]
[code]Mod6 ld c, ... , 17 bytes, 66cc[/b]
[code]Mod7 ld c, ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... />
which also saves 768 bytes of memory.
Anyway ... 1
ld hl, tbl_rows
ld b, 8
ld c, 6 ... /> .ok
ld (scr_out_row), hl
ld de, cursor_row
ld hl, scr_out_row ...Calling all coding munkeez...Having spent the last 8 years as a Windows application developer I thought I'd try my hand at a bit of Z80 speccy coding - something I missed out on …
... of RAM
49152 Bytes
32768 Bytes needed for ZX81ROM and ... for Spectrum-screen
00256 Bytes needed for printerbuffer
... Like
LD HL,16384
LD A,(HL)
LD HL,16384
LD A,(HL+higherload)Cross compilersAre there any z80 cross compilers out there which will produce spectrum files ready for use? That is to say something which I could copy a load of te…
... />
If you add 2 bytes in front (in your assembler ... />
LD IX, STARTADRESS
LD DE,LENGTH
LD A,255 ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... we can print bytes
xor a
ld b,c ... characters
ld a,(pattern)
ld c,a
ld a,e ... /> call pixeladdress
ld b,a
ld a,1
jr ...PAW questionThis may not be the right place but anyways there it goes: I've been trying to figure out how to import graphic files in .SCR format in the PAW parse…
... adventure. The next two bytes are poked with the values ... space is at
LD DE,2048*screensize +256; ... the screen memory
LD BC,2048*screensize ; the ... information at HL
LD BC,256*screensize ; the ... the attribute data
LD DE,22526 ; point to ...Calling all coding munkeez...Having spent the last 8 years as a Windows application developer I thought I'd try my hand at a bit of Z80 speccy coding - something I missed out on …
... />
[quote]leaves only 8704 bytes to program a full working ... you have
about 16 bytes to emulate every opcode.
LD HL,16384
LD A,(HL+higherload)[/quote ... ]
Oh come now, 16 bytes ...ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... />
; Scroll up
ld hl,04100h ; second pixel line ... will place the first 32 bytes of the attribute map at ... first tried this ;) ! )
ld hl,57FFh ; end of screen ... /> ; Scroll left colour
ld de,5000h ; second to last ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... have my screendump of 37 Bytes to proof that (If however ... HL)
INC HL
LD A,(HL)
RST #10 ...
LD A,(HL)
INC DE ... br /> NBYTE DEC B
LD A,B
CALL #22B1 ...
LD A,(HL)
RST #10 ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... "LD HL,addr" added where necessary, Mikie's was 52 bytes and ... the Doctor's was 67 bytes. I didn't stress enough ... bit. The position of the bytes varies so INC HL is ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... "LD HL,addr" added where necessary, Mikie's was 52 bytes and ... the Doctor's was 67 bytes. I didn't stress enough ... bit. The position of the bytes varies so INC HL is ...
