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Variable sized tiles /tile routineHow would you do a variable sized tile routine where the tiles have position variables too? Thanks would be interested to learn :)
... in d & e and print all the graphics on screen ... /> ld a, (currentlocation)
ld bc, roomtable
call getgfx
ld bc, roomtable
call getgfx
add hl, bc
ld a, (hl)
Can anyone show a slight diagram of how pokes work in a jet set willy game for example?I know its kind of something to do with machine code and Memory addresses etc but would be nice to see a youtube video or some drawings etc ? .Many t…
... ]
ORG 32000 ;tells the assembler where to store the code ... works, try modifying it to print different patterns, see if you ... can print it elsewhere on the screen ...Calling machine codeOccasionally I see on ZX computers (mostly the spectrum, but I think also the '80 and '81), how someone made their machine code and wrote the bytes i…
... X is the contents of BC at the end of the ... you execute 'LD BC,1234: RET' using a PRINT USR statement, it ... will print '1234' on the ...Help! I'm learning Machine Code...Having decided to take the plunge and learn to machine code a while ago, I have started in earnest using the much recommended 'Mastering Machine Code…
... 's not clear how an assembler would handle this. In theory ... "]waaay to tedious. Get an assembler (for example pasmo - http://pasmo ... 've never worked with an assembler before and therefore have no ... that it worked? Could I PRINT PEEK the first 50 locations ...Calling machine codeOccasionally I see on ZX computers (mostly the spectrum, but I think also the '80 and '81), how someone made their machine code and wrote the bytes i…
I tended to use PRINT USR 32768 or LET X= ... see the value of into BC and chucked in a RET ...Simple bit of machine code not working [SOLVED]ishHi all. It's late and I'm tired and I have no idea why the following piece of code wont display a little smiley face [code]ld hl,udg ld (236…
I suggest setting the print position before your routine
< ... /> CALL CLSET ; $0DD9 Set print coords from BC
[/code]
Simple bit of machine code not working [SOLVED]ishHi all. It's late and I'm tired and I have no idea why the following piece of code wont display a little smiley face [code]ld hl,udg ld (236…
... /> CALL CLSET ; $0DD9 Set print coords from BC[/code]
...does ... ? It seems to print my character ...Online AssemblerHi, Has anyone tried this? [url="http://clrhome.org/asm/"]clrhome.org/asm/[/url] I tried building the example to a .tap file, saving it and …
... /> This little code snippet will print "Hello world! " at 2,2 ... that is loaded into the BC register pair before the code ...
done:
ld bc,0
ret
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... br />
Dis-Resolve assembler listing: [code]
org ... ld de,X0_Y0
ld bc,4
ldir ;set ... #
pop bc ;BC=unplotted pixels #
push bc
call ...Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... br /> ld hl,16 ; print number in hexadecimal
push ... char *buffer
pop bc ; radix
push af ... : hl = uint num
; bc = int radix [2,36]
; hl = unsigned int
; bc = radix
; ix = char * ...What am I doing wrong here?[code]IF INKEY$=SCREEN$ (21,4) THEN LET SCORE=SCORE+1[/code] It's delivering a positive every time.
... ;HL=$2d2b (discard)
pop bc ;BC=$3365
pop de ;DE ... br /> push de
push bc
ld de,(23653) ;(STKEND ...
LET score=score+1: PRINT AT 21,16;score; AT ...Character Based SpritesHi, I'm working through Jonathan's excellent guide to writing games, and have mastered the animation of single UDGs. Before or move onto Pixel…
... using 'UDGs' and the ROM PRINT routine.
The 'UDG ...
ld bc,32
add hl,bc
dec ...
ld bc,32
add hl,bc
dec ...
djnz loop2
pop bc
djnz loop1
Empire - port of trs80 basic programBack when I was a little kid, I had the opportunity to play around with a trs80 model 1 with level 2 basic. One of the games I often played was call…
... version of PRINT USING, so I rewrote it in assembler (341 lines ... about 0.2 second to print a line.What if the Spectrum never had colour clash?Silly topic ahoy! What if the Spectrum never had colour clash? Would the Speccy have had the same charm? Would games have looked like this?: [url="h…
... (%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1 ... the color port, then just print the graphics on any single ...What if the Spectrum never had colour clash?Silly topic ahoy! What if the Spectrum never had colour clash? Would the Speccy have had the same charm? Would games have looked like this?: [url="h…
... (%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1 ... the color port, then just print the graphics on any single ...Empire - port of trs80 basic programBack when I was a little kid, I had the opportunity to play around with a trs80 model 1 with level 2 basic. One of the games I often played was call…
... /> [code]
PRINT-USING.ASM assembler listing for "PRINT USING" function
PRINT64-FN.ASM assembler ... Spectrum BASIC listing
PRINT-USING.BAS BASIC listing for ...Empire - port of trs80 basic programBack when I was a little kid, I had the opportunity to play around with a trs80 model 1 with level 2 basic. One of the games I often played was call…
... ): LET j=k1:
LET bc=USR pu: GO SUB s5 ... )+") ": LET j=k1
97 PRINT c$; FN t$(p$(i ... $=STR$ a(i,k6): LET bc=USR pu:
LET z ... $=STR$ a(i,k7): LET bc=USR pu: PRINT ,z$:
[/code]Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…
... . Here is the finished Z80 assembler:
[code]62000 ...
120 CLS
130 PRINT AT 0,0;"ADDR";AT ... GO TO 300
180 PRINT A;TAB 7;H$;
210 PRINT TAB 12;P;
220 ... D=D+P
260 PRINT TAB 17;P;TAB 22 ...DYNAMITE DAN I vs DYNAMITE DAN II - WHICH IS THE BETTER GAME?Welcome to the September 2016 edition of Which Is Best? Last month I placed three Amiga top down racers, Nitro, Super Cars II and Overlander. Overl…
... shiny new CPC and a print out of Rod's source ... the source into my DASM assembler and this taught me everything ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... programs you'd use an Assembler to do this for ... LD DE,58368
LD BC,6912
LDIR
RET ... DE=58368
1020 LET BC=6912
1030 POKE ... +1:
LET BC=BC-1: IF BC>0 THEN GOTO ... It simply repeats itself until BC counts down to 0. That ...Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…
... ROM routine that does a PRINT or a LET or a ... /> 65350 1, 0, 8 LD BC,2048
65353 237, 176 ... /> 65362 1, 0, 8 LD BC,2048
65365 237, 176 ...POKE taking a variable amount of time...Hi Folks, Does anyone know why the following POKE statements seem to vary in their execution time? [code]100 POKE 60000,10 110 POKE 60001,16…
... actual operand of the LD BC,[i]nnnn[/i] instruction, ... /> $EA60 $01 Opcode for LD BC,nnnn
$EA61 $00 Lower ... already part of the LD BC,[i]nnnn[/i] instruction as ... typed the values into an assembler yourself.
[ ...Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…
... are a few ways to print these pretty fast as opposed ...
xor (hl)
ld (bc),a
inc c
RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... /ZXBasicManual/zxmanchap26.html[/url]
PRINT USR n calls the machine ... contents of BC register pair which is then printed by PRINT command ...RANDOMIZE USR, PRINT USR etcHello just wondering why is it called RANDOMIZE UsR what does randomising have to do with it ? When calling machine code routine from adress x you ty…
... question first, "PRINT USR 65368" doesn't print the UDG because ... starting at 65368 and then print the resultant number.
... [code]
pop bc ;BC=$2d2b (discard)
pop bc ;BC=$3365
pop ...
