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Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…
... to get from one line to the next below it?
next line[/I]" than this, because if ... -
BASin Release 6 available for DownloadHi all - It's another cut'n'paste from CSS :) I've been tapping away again, and seeing as a couple of people have recently seen BASin's latest bits…
... the line that the text occurs on. Replace functions may be next ... .
Added in the GOTO line numnber and ... accordingly.
Added the command line history - use the pgup/pgdn ... Menu Items "single step" and "next line" in the main window's ... -
How to get Grahics to wrap vertically around the screen?I am using the following code to draw an image to the screen. First I use HL to contain ROW and COLUM I then call the MapScreenFunction As I draw m…
... my sprite, it calls Next line to get the next line.
However ... 192 lines, I want the next line to go to 0, thus ... -
Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... INC H ; *256 to get next line
LD A,(DE)
next line
LD A,(DE)
next line
LD A,(DE)
next line
LD A,(DE)
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... INC H ; *256 to get next line
LD A,(DE)
next line
LD A,(DE)
next line
LD A,(DE)
next line
LD A,(DE)
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... INC H ; *256 TO GET NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
NEXT LINE
LD A,(DE)
Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... INC H ; *256 TO GET NEXT LINE
INC B
LD ... INC H ; *256 TO GET NEXT LINE
INC B
LD ... INC H ; *256 TO GET NEXT LINE
INC B
LD ...Does ScanLine[0] have a left border?My emulator couldn't handle Cobra or ShortCircuit so I added some rough port FF values. I now want to make it a bit more accurate. The FAQ gives me a…
... then border again." (left on next line)
But it ... ) Skipping ahead to line 311 - the last line. What happens to ... is on the next line but there is no next line! Does the horizontal ... retrace of line 311 also ...My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... />
call IncY ;get next line draw position, return in de ... inc d ;256 bytes below (next line for this char)
... yet, so, adjust de to next line
;and 0xF7 ; ...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 hand end of next line to be copied
... to
dec c ;next line up
ld a, ... next line through a char
add hl, de ;goto next line ... to the next line up
sub 7 ;next line up is ... to the next line up
sub 7 ;next line up is ...How can I do this, please?I'm using the PSP as an e-book reader, as it has a good text viewer (built into iRSHell), but it has the fault that it's not much good at word wrappi…
... the text so that each line is a maximum of x ... number x), and if that line would then terminate in the ... the begining of next line instead, and the current line is shortened by ...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…
... left hand verge on the next line, we need to move 21 ... to left verge on next line'
Insert line 16, 'add hl,de ... to 0 in the next line.
Change line 20 'ld bc, 0 ... line 3 with 'di'. Insert line 29, ei. Insert line 31, di. Insert line ...Machine code issue...Hi Folks, My trials with MCODE continue and I am stuck. I wrote the following program in BASIC to simply POKE an attribute byte in to a "box" on th…
... a=a+1:
NEXT c:
LET a= ... 32-p(4):
NEXT b:
RETURN [/CODE ... br /> 0D DEC C ;Next Character
2006 JR ... br /> 05 DEC B ;Next Line
201B JR NZ ...Help?Hi All, I wonder if anyone has a few minutes to look at this bit of code I'm working on. I'm trying to move to sprites and want to do it with a scr…
... down the left side line by line l the way ... or anything below (ie next line down as dictated by ... 2 bytes along for next table address line
inc ... (lines of character for next from top
ld ... down, increase twice for next screen address
inc ...Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... br /> inc l ; 4t - next mem
exx ; 4t - ... ; ********************
inc l ; 4t - next char square
srl c ... ; 4t - down another for next line
dec l; 4t - ... ; 13/8t (1183t per char line)
; *************************************
; move ...Kiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…
... ;RETRIVE CHARACTER
INC HL ;NEXT ADDRESS
OUT (2), A ... $C0 ;LOAD A WITH NEW LINE COMMAND
CALL COMMAND ;SEND ... , $C0 ;LOAD A WCITH NEXT LINE STARTING ADDRESS
IN A ... /> INC HL ;INCREMENT HL (NEXT ADDRESS)
INC DE ;INCREMENT ...Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... repeats the process with the next line of 22 tiles.
...
inc h ; Point to next line down (4)
inc de ... 2 bytes for address of next tle line
nop
< ...
scroll_loop pop de ; POP next destination address 10
pop ...joining lines of BASICDue to overwhelming demand - well, one demand - well, more of a suggestion, really - here's a routine to join together lines of BASIC. The vertical c…
... will join the line to the next line (if there is ... lines. (If the next incremental line number had already been ... ;cursor down : end of line : join next
LD DE,(23649) ... : ;addresses: DE=LH-line; HL=RH-line
sbc hl,de ...28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... at the end of the line and starts PUSHing like crazy ... 8 characters of the top line
PUSH BC ; At this ... -most 8 characters of the next line
PUSH DE ; At this ... -hand area of the 9th line of the screen (not really ...INPUT help?Hi folks. :) Brace yourselves, this is probably a very silly question, my BASIC knowledge is very... well, basic... Let's say, for example, I'm mak…
... you play. I write a line to generate the random number ... />
I'm thinking the next line should be something like "IF ...TAPlist - the emulator versionI've got this working reasonably well; there's just a couple of small extra features which I want to add. (Recall that TAPlist writes a formatted lis…
... /> [*]Additional "alignable" commands defined in line 9996. These are a selection ... 6kb buffer. Whenever the next text fragment would overflow the ... at the start of the next line.
[*]As there is ... big series of nested FOR...NEXT loops which illustrate the ...Simple text scroller, first character problemin a text scroller, whole line scrolled to the left by 1 pixels using RL(HL) ; DEC L method. But at the rightmost character must be printed immediate…
in a text scroller, whole line scrolled to the left by ... character at the start of next line and hiding it with attributes ...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…
... address to get to the next line.
To start with ... SCREEN ADDRESS TO GET TO NEXT LINE
LD BC,32 ; 32 ... ADDRESS TO GET TO THE NEXT LINE
POP BC ; RETRIEVE THE ... get the address of the next character line down etc...
RET ...How 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…
... left then you move every line left and draw entire column ... 'd be adding 256 for next line. And when you're done ...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…
... inc l ;advance to next byte (make sure sprite data ...
inc l ;next char cell to the right ... br /> inc h ;down one line
ld ... if we're moving onto next third,
and 7 ... overflow, we're on the next line
;of char row, ...Working with streams in BASICHi I've been screwing around with streams and Spectranet, there's something I can't figure out. If you want to send data to a stream how can you tel…
... instead of reading some data line by line I want to receive ... rather than me reading it line by line with INPUT statements and ... computer to give me the next line. I have a feeling it ...RAD for SpeccyJust wanted to share a fine technique of rapid app development for ZX Spectrum in C. Programming without debugger is a pain. It comes down to needing…
... startLine;
// Start line is line at which we start our ... it.
int line = 0;
while (line < intersect.h ... )
{
// Calculate line pos. in vmem.
int ...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…
... counter
inc de ;next text character
ld ... br /> ld h,51h ;line address
inc a ... scr_lp1
inc h ;next line down
db 18h ...
