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Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... is it saying that each line of block must be always ... in length and not ordered line by line?
Or ... each line be 811 bytes in length ... would be 5 bytes per line (2 pixels per byte) ... by 5 bytes for the next line etc... so just 50 bytes ... -
basizx newsHello. I've uploaded a new version of basizx. Now there is also an Amstrad CPC incarnation, able to LOAD and SAVE +3 basic files in disc. And the I…
... character by character rather than line by line.[/QUOTE]
... header" - two bytes form the line number, two bytes the length ... are used to search line by line, rather than character by ... to search from the next line if the line number to search for ... -
basizx newsHello. I've uploaded a new version of basizx. Now there is also an Amstrad CPC incarnation, able to LOAD and SAVE +3 basic files in disc. And the I…
... " - two bytes form the line number, two bytes the length ... are used to search line by line, rather than character by ... search from the next line if the line number to search ... to get to the next line except it uses 1 ... byte for the line length. Thats also where ... -
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…
... number of bytes per line
ldir ;draw line
call IncY ;get next line draw position, return in de ... /> pop bc ;one less line to draw
dec bc ... -
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…
... - the address of the line below ;
; ... - the address of the line above ;
; ... character to next line
... -
Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... . Getting new address (one line down) is very fast just ... HL next line
LD (HL),B
...
POP HL next line
POP HL 1st line
- draw line here -
POP HL ... 2nd line
- draw line here -
POP HL ... -
Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... cases. Getting new address (one line down) is very fast just ... -position
POP HL first line
LD (HL),C some ... HL next line
LD (HL),B
...
POP HL next line
line", you still have to add ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... of the first line and press "DEL", the next line will be concatenated ... -
How did games started with LOAD "" CODE auto-start?Some early games (l remember for example [B]Galaxians[/B] from 1982) was loaded with LOAD "" CODE, which in one single block first loaded the loading…
... then after reloading the
next line in BASIC is executed; the ... -
question about RST 10hhow do you set the position of the text when using 'RST 10h' to print to screen?
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…
... /> [/code]
The first line above is a prototype; after ... the element m[0]. The next line adds 1 to the address ... an integer. However the following line "*v = 10;" is illegal because ...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…
... number generators actually calculate the next random number from the previous ... to move down one scan line
void d_PrintDoubleW( ... won't wrap to the next line). 2- the scroll routine ... new destination address for the next pixel row.
...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…
... // compute initial print position of line
if ( ...
// print chars in line
while (*s ... }
}
// get next line in string
++prow ...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…
... a pointer to the next line to print and will ... disp".
The next line colours the character square on ... advances to the next scan line in the next line by adding 256 ...
[code]
// get next line in string
++prow ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... calculates the address of the next line down the screen. You should ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... address of start of character line
oneLineLoop
; Move on to the next screen line.
; Alternatively could get ... out the address of the next line
; This is ... need to move to the next block.
...Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... /> inc h ;Go to next line.
cp 7 ;Have ... 32 ;Perform jump to next char boundary
add ... ;increment h to pixel line aligned address
dec ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... call the instruction on the next line.
This cause me ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... call the instruction on the next line.
This cause ... a specific statement within a line, with the value being ... of statement numbers within the line. However, people have wrote ... LET statement just before the NEXT statement is another handy way ...Help!!!i had to re boot my computer recently and now i keep getting a message saying somthing about a generic host and win 32 problem.Please could anyone h…
... .\svhost.exe.mdmp
next line is the same but at ...New Spectrum game - On Reflection"On Reflection" has been my pet project for the last two years or so. My initial idea was to try to create a Spectrum adventure which was a bit more …
... punctuation mark on a new line when it follows a colour ... at the begining of the next line. No solution (save shortening the ...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 ...IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …
... as it just LOAD"" the next game).
... LD E,(HL) ;get line number into DE
INC ... LD B,(HL) ;get line length into BC
INC ... br /> CALL prmsg
DEFM "Line"
DEFB ' '+$80
line reached
JR newline ;do next line in ...Start Tape, Press any key...Hi, I'd like be able to save (program or data or code) using the save "whatever" command, but I want it to start recording immediately, rather than …
... the program moves to the next line. If it doesn't work ...which is the best?Hello, Since RealX is not coming out in the near times (realSpectrum was my favorite emulator) Can anyone point me a good one to replace it??? Som…
... that sometimes is on the next line under the zxspin bit lol ...Changing the way SCREEN$ is loadedThe way the speccy loads in a SCREEN$ is interesting - top two-thirds first, then middle and finally the bottom, which is due to the way the speccy d…
... understand how to draw line by line first. Its my ... 224 bytes to next line
nextline: inc hl ; next screen address< ... nz, nextline ; continue if hl = next line
push bc ... jr nz, screenaddress ; draw next character line if not
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... (they will be filled with next PUSH anyway). So, you must ... (hl),d
inc h ;next line of screen
pop de ... (hl),e
inc h ;next line[/code]Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…
... is needed to test the next characterline ( like the PRINT AT ... = H=64, L=0
Next pixel line = H =65, L=0 ... , L=0
Then the next line is H=64, L = 32 ... that you are on the next line
then you need to ...
