-
Spreadsheet help (Excel numbers larger than 15 digits)Hi all, I have a problem with a spreadsheet not being able to give a result if there are more than 15 digits. Made a spreadsheet to add up the fib…
... cell:
=Left(first number,8)
2nd cell:
=Left ... (second number,8)
3rd cell:
=right(first number,7 ... )
4th cell:
=right(second number,7)
5th ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
[code]
; de pointer to 8 bytes graphic data
; b ... *row
sla b ; row = 8*row
sla b ; row ... be aligned to a 256 byte boundary
adc h ; A ...
ld b, 8
.loop:
; blit 8 pixel row to ... -
Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... 0,128,64,32,16,8,4,4,2,2, ... ,64,32,32,16,8,4,2,1,0, ... ,2,2,4,4,8,16,32,64,128, ... RET
SCROLL DI
LD (SCRMODA ... A ;the screen, ie. the right side
INC E ; ... LD A,(DE) ;The leftmost byte of each background
OR ... -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... to right, 1line up
ex (sp),hl ;?? load posn of byte ... top of a group of 8 pixels
jr nz,addone ... top of a group of 8 pixels
jr nz,nextblock ... ;otherwise continue with another pixel scroll
endroutine
ret
Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... car
;scroll road
;random road left or right
;jump ... meets will be an instruction byte.
It does something ... its work using 7 temporary byte-sized addresses called 'registers'.
8 pixels per byte.
Try POKE-ing ...multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width isHow would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…
... smooth ongoing scroll step be? 2? 4? 8? 8 seems easy ... more nasty to scroll (3 shifts per byte); but one ... 512 tiles. If you scroll 8 pixels left then you ... draw entire column on the right.
You ... simple, sequential 8x8 chars (8 bytes per tile, one ...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…
... never oversteps the 256-byte boundary. If that’s ... ;load C with first byte
inc l ;advance ... to next byte (make sure sprite data ... next char cell to the right
ld a,(hl ... high byte of screen address
sub 8 ;subtract 8 from ...ZEsarUX 8.1 Beta 2Hi! I have uploaded a new ZEsarUX 8.1 Beta 2 version! You can download it from https://github.com/chernandezba/zesarux/releases/tag/8.1-161220…
... have uploaded a new ZEsarUX 8.1 Beta 2 version!< ... .com/chernandezba/zesarux/releases/tag/8.1-16122019
... , registers located at the most right position
-debug CPU ... br />
Improved Waveform: new scroll type
Fixed error ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... .com/chernandezba/zesarux/releases/tag/8.1
... />
Version 8.1 - The Great Escape edition ... registers located at the most right position
-cpu transaction ... br /> Improved Waveform: new scroll type
Improved file selector ...Sort 2 byte words (x, y) on ypos, also question about swap (DE), (HL)Well that was a lot of debugging ;) But if you want a routine which takes an array of 16 byte words x, y and then sort them on y (ignoring x), I'm…
... takes an array of 16 byte words x, y and ... both even) can save 8 T-States by changing the ... /> ld c, a ; largest = right
jr .donerightandlargest
.doneright ... /> largest = l;
// If right child is larger than largest ...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…
... h, (hl) ; second byte of table
add d ... hl, hl ; HL = char * 8
add hl, de ; + ... loop counter
ld b, 8
.loop
ld ... cp 24
call z, scroll
ld (scr_out_row), a ...
rra ; rotate right including carry
jr ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... happen when you get the right code?
Well, ... jump whether the code is right or wrong) and presto ... against our own.
Scroll back a tad again and ... A,D ; Take the high-byte
E904 AND 03 ; ...
128 64 32 16 8 4 2 1
0 ...New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... :
POKE 23658,8: REM CAPS ON
POKE ... keys 6, 7, 8, 9 and 0 (left, right, down, up ... 6, 7, 8 and 0 (left, down, up, right and fire, respectively ... 0)
50 IF K$="8" THEN X=X+(XCHR$ ... 7 always points to the right character set when PRINTing, ...Alien8 style 3D Tiles - TheoryHello, Are there any articles etc explaining how to do 3d style tiles, i.e. when to redraw those in front etc. I would guess you would need to work…
... that I used to scroll objects across that were ... I rotated it into the scroll buffer before masking into ... , sometimes it might be 8 pixels wide, sometimes 16 ... drawing left to right loops every third byte but if you ... the normal left to right method or by some ...Xenon TriOxide (Xeo3)I just wanted you all to know that a new cross platform game has started development (well the +4 version has been around a while, but my colleague f…
... ; 64009
ld b, 8 ; 64010
l_fa0c: sla ... ; 64019
ld b, 8 ; 64020
l_fa16: inc ... LD L,C (restore lower byte of pointer), AND A ... pixel right to the correct position.
so scroll them ...Scrolling Loader CounterPlease can someone help me with writing a scrolling counter for a loading system. I like the Hewson counter so i`ve taken the font from zynaps loade…
... `t even understand how to scroll the numbers in assembly yet ...
when 8 bits are collected, loader put whole byte at adress ... -BYTES ?, i don't know right now)
the point ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... width text messages to scroll across the bottom of ... />
for (i=0; i!=8; ++i)
{
*(sbuf++) ... [code]
bmp = d_chars + *(s++)*8;
[/code]
"d_chars ... we store the right half of the UDG byte into the ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... /> #asm
////////////////////////////////////////////////////////////////////
// Scroll the double printed message 1 ... "uchar *dbuf" then 8 bits for "uchar l". ... sbuf (skip 1-byte l, 2-byte dbuf)
... pushed in left to right order onto the ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... Edit: Ooops, you are right. The 8*32 ldis decrease bc by ... like starting and stopping continual scroll and changing the message ... , 0xd1d1); // create a 257-byte table at address 0xd000 containing ... call creates the 257-byte interrupt vector table at address ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... (disp, disp, 32, 8); // scroll scanline left using operation #8 (rotate left source ... we are implementing a right to left scroll, is where the current ... using memopd() with operation #8 (rotate source byte left) which starts at ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... to right, 1line up
ex (sp),hl ;?? load posn of byte ... top of a group of 8 pixels
jr nz,addone ... top of a group of 8 pixels
jr nz,nextblock ... ;otherwise continue with another pixel scroll
endroutine
ret[/CODE ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... QUOTE]
Chapter 8 in [url]http://www.z80 ... address one double byte at a time, right? In which case ... bytes back in the right order on the screen ... And this doesn't even scroll the screen in pixel row ... to hard code the scroll in a single monolithic ...ANN: Spud v0.201New version of Spud released. Nothing major just a few bugfixes thanks to user feedback. At the soon to be usual link [COLOR=#4040c0][URL]http://…
... close icon at top right. Program not responding! I ... should be removed?
8 - If you make the ... the ROM is just byte after byte of 00.
... stop the stack window (top right) from showing anything!
scroll bar doesn't do anything.ANN: Spud v0.201New version of Spud released. Nothing major just a few bugfixes thanks to user feedback. At the soon to be usual link [COLOR=#4040c0][URL]http://…
... close icon at top right. Program not responding! I ... should be removed?
8 - If you make the ... the ROM is just byte after byte of 00.
... stop the stack window (top right) from showing anything!
scroll bar doesn't do anything ...A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... QAOP keys to change scroll direction of starfield.
CP 'p' ; right
JR NZ,KEYTEST5< ... br /> CP 0 ; Right
JR Z, ... 8
ADD A,H ; add original high byte ... POP HL ; retrieve pointer screen byte
XOR ( ...Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....
... graphics in the full 8 colours per layer (or ... can track down the right Ictari group disk-mag ... to manipulate the low-byte of the screen pointer ... the screen address per byte, you could manage pixel ... ST, you could hardware scroll 8 pixels vertically), but you ...Jonathan Cauldwell writes.I also found this in me old archives, which was actually written by Jonathan Cauldwell. Again, typos and editorial tags included for authenticity ;-)…
... game doesn't feel right it simply won't ... is important to get this right. Subtle changes to the ... to manipulate sprites or scroll the screen has to ... considered. Even when every byte is used, there is ... Spectrum games today? Perhaps 8-bit developers do need a ...
