-
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... 't be necessary, I'm planning to implement animations without ... LET t=t+1: NEXT c: NEXT r
60 ... INT ((r+f)/8))*32+c+g*256+h)
... (35000+256*(r+f)+c+g*32+h+6144)
routine at line 100 converts a ... coordinates [B]r[/B],[B]c[/B] to tile image ... -
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... parenthesis from the sub-routine invocation from inside the ... idea!
I'm also defining a few other ... that calling "BIFROSTsetTile(r, c, 255)" produces the following ... experience from implementing an optimized C compiler decades ago (unfortunately ... -
Routine for clearing screenI was looking for a 'nice' way of clearing a screen of graphics in Z80. After a ridiculous amount of time mucking around, this is the best and most …
... />
Be my guest. I'm only in it for the ... xor H (before rotation) by C register (=192) and also keep ... ;613391]Clever, looks nice. I'm not too hot on the ... out not provided by my routine. -
Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…
... , except for replacing a few routine names:
[CODE]
/****************************************
Save As: bfdemo.c
Compile with:
zcc +zx -lbifrost -vn bfdemo.c -o bfdemo.bin -create-app ... -
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... the buffered display and the routine will
automatically sort ... And Push Edition
; Copyright (c) 2012 Andrew Owen
routine*. Though in data terms I ... as pedantic, & I'm sure I'm not telling anyone anything ... -
Store and restore attribute valuesI am needing ideas on how to write a machine code routine that will store/restore (more important to restore) attribute values to the 22528 area. I …
... to write a machine code routine that will store/restore (more ... make it easier, but I'm a bit lost...[/QUOTE]
m sure but a quick test ... save
stlp ld c,255 ;c is decremented during ldi, so ... b,16
ralp ld c,255
ldi
... -
Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... pop bc
bit 5,c ;check attributes option
ret ... not valid for the routine). i'm not checking if address ... -16415). so call this routine as randomize address: randomize ... 24 attribute bytes
ld c,32
loop:
... -
Open and read a file using +3DOS in MCForgive me if this has been asked and answered before, I've spent a fair few hours searching the forums and looking for books on the subject, all wit…
The OPEN in that routine uses "open action" 1 - "open - ... />
I must admit I'm not clear on the use ... of the C register with READ/WRITE or ... on page 223. I set C to 2 for page 2 ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... /> AAAA
Also, I'm chuffed (& suprised) to see ... ,192-16
loop ld c,255
pop de
nextlinedn ;modified from AOWENS Routine above
ld a,d ... /> ld e,a
ret c
ld a,d
SUPER INPUTA couple days ago I searched for an "INPUT string" routine that I could use in Assembly programs and supported multiple lines, but I found none. Thus…
... program to invoke an Assembly routine passing parameters through a BASIC ... /> ld a,b
or c
jr z,NOTEXT
m handling all error cases (except ... documented somewhere and I'm just reinventing the wheel?Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... implements a "table lookup" routine, used when reading an ... quicksort implementation. I'm not quite comfortable with ... /> call asm_tolower
ld c,a ; c = *s2
or a
jp m, swap_ij ; if item[j] ...Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…
... code but will the LET C= line only give 4,8 ... ,16 anyway? If so the routine below would do this.
m on my brew :-D
ret c ;carry not set, number already ...Low level microdrive programmingSo I'm on my lunch break trying to find out about low level microdrive programming (without using IF1 ROM). I see one can use port 0xe7 to read and w…
... a sector separator. The read routine first looks for a non ... /w bit (port 0xef)
c) write to port 0xe7
c) stop motor (but when? how ... size in bytes, but I'm not sure that have any ... the r/w bit
c) read from port e7 (byte ...Switching 48/128 modes within a BASIC programI'm not sure what use this would be; ie. being able to switch between 48k and 128k modes and back again from within a continuously running BASIC prog…
... from an 8-year old c.s.s. posting "How to ... an assembler listing. The switch routine relies on the error trap ... /> 2010 INPUT "Switch/Quit ";m$: IF m$="s" THEN RANDOMIZE USR 32834 ... $1f54 ;BREAK-KEY
JP C,$1e73 ;GO-TO-2 - jump ...Quickest way to fill the attributes using LDIRI'm looking for a small routine to fill the entire attribute area of the memory with a single value, I've used LDIR in the past, but forgotten how to…
[QUOTE=daveysludge;645434]I'm looking for a small routine to fill the ... attributes -
[IMG]http://c.cslacker.com/976l.jpg[/IMG ...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…
...
Hi folks, I'm a machine code novice who ... 'djnz fillscreen'
Because our routine will continue from the loop ... keypress to 'brake')
;wait routine
ld bc,$1fff ;max ...
djnz fillscreen
ld c,b ;initialise score
push ...recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …
... />
Disabling interrupts in the routine itself is too late, as ... LLIST (two places)) and I'm not calling any of them ... expressions give errors 2 and C respectively and, presuming that the ... the normal error exit), my routine executes the given actions, stacks ...Mini scroll routineI'm looking for a routine that scrolls a small section of the screen downwards and replaces it with nothing, 2 x 2 charcter blocks to be precise, to …
... would do this anyway*. This routine scrolls the whole display file ... for an atmospheric effect? (I'm assuming this is for an ... is affected by the called routine, so save it nice
ld l,a
ret c
ld a,h
ld e,a
ret c
ld a,d
help needed :) how to rotate a 3 x 3 array 90 degreesI just cant seem to get this sorted in my head ( or on paper ) , I've found multiple examples in C , python , etc but cant find any z80 examples any …
... little BASIC demo of a routine which will rotate any 2D ... t know about arrays I'm just using a simple 1D ... DIM b$(d*d): LET c=CODE "A"
20 ... a-1)*d+b)=CHR$ c: LET c=c+1:
NEXT b ... br /> NEXT b:
LET c=c+1: NEXT a[/color]
help needed :) how to rotate a 3 x 3 array 90 degreesI just cant seem to get this sorted in my head ( or on paper ) , I've found multiple examples in C , python , etc but cant find any z80 examples any …
... assembler version of my BASIC routine which will work for squares ... dims=5: LET m=dims*dims: DIM a$(m)
15 FOR ... /> 20 FOR a=1 TO m: LET a$(a)=CHR$ (PEEK ... /> jr nc,LOOPB
inc c ;C'=c =c+1
ld a,b ...Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.
OK Guys, I've updated the TAP version to include digital audio by default, and moved the player code to Uncontended RAM making it sound much better.
I've also made the IDEDOS / +3 disk version which includes a cheat menu and in-game level skip ...Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... -32767. The BASIC routine works fine; I'm sure it's the ...Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... at 25278 ) in the routine at [url="http://pyskool. ... 28130 onwards in the routine at [url="http://pyskool ... after the RET C at 62816 in the routine at [url ... url]
[*]The entire routine at [url="http://pyskool.ca ... m not sure yet what's going on with the routine ...Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... A) boom, B) fizzle, or C) nothing? It'd be fun ... a MIDI interface although I'm not sure whether it's ... understand unless someone writes a routine to read that data.
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
[QUOTE=FrankT;674730]I'm using this to decompress ... contain RCS address)
ld c,0 ; current column
... ; next row
inc c ; next column
inc ... /> [/CODE]
The routine above is simpler and shorter ...RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…
... , or unless a different interrupt routine has been loaded, the +2A ... call the disk motor timeout routine as part of the interrupt ... load from BASIC, and from c/m use DOS INITIALISE, DOS OPEN ... of the game's IM2 routine shifting stuff around - including the ...Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…
If I'm looking for a ... past, or if I'm looking at a file ... [strike]Otherwise, here's a routine which lists addresses for areas ... ld bc,$7ffd
out (c),a
ei
... ld a,b
or c
ret z ;nothing to ...Quest for Witchcraft undeniencedI notice on the latest [url]http://www.worldofspectrum.org/whatsnew.html[/url] (02 Jan 2013) that LCD undenienced [url=http://www.worldofspectrum.org…
... a issue with Beepola playback routine which I cannot fix, as ... in October 2010, predating the (c)2011 message in Quest for ... ? I suspect not, myself. I'm guessing Mr.Beep used summat ...
