-
64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... /> LD (CurrentLineAttrs1),HL ;start of next line
;delay
NOP ...
;----------------------
;go to next line
;delay
LD ... ,32
LD HL,(CurrentLineStart) ;next line screen address
ADD HL ... -
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 ... -
Mini scroll routineI'm looking for a routine that scrolls a small section of the screen downwards and replaces it with nothing, 2 x 2 charcter blocks to be precise, to …
... DE to next one down
call drawline ;fill one line of ... /> ;
nextlineup ;points hl at next line up in display file. Modified ... /> ;
nextlinedn ;converts de to next line down in DF, modified from ... -
Using RST 16 and udg flickerHi there! I'm using UDGs and RST 16 to make a simple canyon bomber game. I've got the game mechanics working ( finally ) but now I'd like to make …
... as it moves to the next line down. This is where I ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... update, the game goes line by line updating the screen:
1 ? If the line is the first of the ... is any sprite in that line. If there's a ... pointers and go to the next line, until the whole screen ... 2 & 3, that line will show the data corresponding ... -
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..…
... and drop through to the next line in the routine. If the ... -
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..…
... use these 2 routines for next pixel line up and down. It ... ;returns with DE pointing at next pixel line up in Display File ... /> ;
nextlinedown ;converts de to next line down in Display file, modified ... -
Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... the start of each display line, an interrupt is generated by ... the first character in that line in the display file + ... internal shift register during the next eight cycles.
... interrupt is generated for the next line of the display.
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... : READ b: POKE a,b: NEXT a:
PRINT AT s ... -(22 AND s=21):
NEXT s
1002 DATA 233 ... HL = the address of the next line.Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
... HL = the address of the next line.[/QUOTE]
But then ...Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... at the end of each line in the frame buffer that ... to the beginning of the line. That would allow it to ... need to insert the next-line jumps for each line at the right ... , add some sprites, insert the next-line commands in the right place ...Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... at the end of each line in the frame buffer that ... to the beginning of the line. That would allow it to ... the initial position at the next character row).
My ... , add some sprites, insert the next-line commands in the right place ...Using FOR/NEXT like 'while'I don't know if this has already been discussed (I did search, but the search engine didn't like the word 'while'), but here's a way of using a FOR/N…
... :
GO SUB FN w(line,while) -or- GO SUB FN ... u(line,until)
with the subroutine ... SUB stack, or else the "next line/statement" system variables.Printing textThis is probably quite a basic question, or there might be something obvious I'm missing. I'm looking for an economical way of printing formatted te…
You might be better off writing your own text printing routine where using a control character moves the text down to the next line without resetting the column number to zero.BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... be specifically line 1, just the first line of whatever' ... lost" error if the line being executed had moved. Using ... will continue loading from the next line.
--
... Fixed the broken line handling as well.
Font hack that was used in a lot of early gamesThere was a little hack for changing the fonts on a spectrum and I remember it being used in a couple of old games on the 48k, it was a sort of ye od…
... the starting address of the next line, at $1BBF LINE_USE, held in ... start to find that line, using the line lengths to do so ... br />
(The line zero POKE stops the line being edited, rather ... /> Just had a thought ... if line 10 corrects NXTLIN as well ...Font hack that was used in a lot of early gamesThere was a little hack for changing the fonts on a spectrum and I remember it being used in a couple of old games on the 48k, it was a sort of ye od…
... when attempting to find the next line. It will work just fine ... your program contains a single line, which is enough for a ... 23758,255
SAVE "test" LINE 1[/CODE]BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... editor, to maintain the Screen Line Edit Buffer and associated variables ... 7, which entailed printing each line as it was being processed ... should then present the bad line for editing with the red ... the middle of a line, then inserting the next line won't work ...BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... attempt to delete line 1 ("1" [RETURN]), the line is not fully ... /> ..which appears to be a line with last character of the ... again to delete line 1, the start of the next line (line 5 for ... me) becomes corrupted (eg: line 5 becomes ...How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
... C2 06 7F JP NZ next button check
CB ... C2 0E 7F JP NZ next button check
C9 ... C2 1A 7F JP NZ next button check
CB ... C2 26 7F JP NZ next button check
CB ... C2 2F 7F JP NZ next button check
CB ... C3 C5 7F Back to next line of MAINBIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... comments:
* A BASIC line may be split across multiple ... the lines manually.
* Line numbers do not need to ... and loading resumed from the next line.
plus:
Decent ESXDOS manualI couldn't find a decent manual for ESXDOS, so I created one myself: [URL="http://www.benophetinternet.nl/hobby/vanmezelf/ESXDOS%20manual.pdf"]http:…
... time:
Remove the next line as there is another one ... (only BASIC commands do), remove next line from the "System Commands" section ...Decent ESXDOS manualI couldn't find a decent manual for ESXDOS, so I created one myself: [URL="http://www.benophetinternet.nl/hobby/vanmezelf/ESXDOS%20manual.pdf"]http:…
... time:
Remove the next line as there is another one ... (only BASIC commands do), remove next line from the "System Commands" section ...Mushroom ManNice to see that Mushroom Man has been such a popular new release coming in at [URL="http://www.worldofspectrum.org/bestgames.html"]the top of the ch…
... -code to go to the next line, but after solving that I ...Interface 1bisHas anyone on here got a "Interface 1bis": [URL="https://sites.google.com/site/interface1bis/"]https://sites.google.com/site/interface1bis/[/URL] I …
... ; and LF
JR LIN_LP; Next line
;
MOVE_R OUT (ROM ...
