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Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... how ROM printing routine (RST 16 or RST $10) works, due to the ... -
Decimal to Binary stringHi all, Anyone got a less labour intensive BASIC routine than this? Example:- take 170 and convert to a string "10101010" take 4 and convert to a s…
Here's the first thing which occurs to me:
[code]
10 INPUT A: LET s$="": LET n=A
20 LET d1=n/2: LET d2=INT d1
30 LET s$=CHR$ (48+(d1d2))+s$
35 IF d2 THEN LET n=d2: GO TO 20
40 PRINT A;"=";s$: GO TO 10
[/code] -
Decimal to Binary stringHi all, Anyone got a less labour intensive BASIC routine than this? Example:- take 170 and convert to a string "10101010" take 4 and convert to a s…
... Brute force method:
[code]10 INPUT "Number? (0-255): ";n ... 1101","1110","1111"
20 INPUT "Number? (0-255): "; ... AND n=15)
20 INPUT "Number? (0-255): "; ... 10 DEF FN b$()=STR$(INT (RND*2))
20 INPUT ... d>=2)))
20 INPUT "Number? (0-255): ... -
Decimal to Binary stringHi all, Anyone got a less labour intensive BASIC routine than this? Example:- take 170 and convert to a string "10101010" take 4 and convert to a s…
Similar to Battle Bunny:
[CODE]
10 INPUT A: LET s$= "": PRINT A; "=";
20 LET s$= STR$(A-2*INT(A/2)) + s$
30 LET A= INT(A/2): IF A THEN GO TO 20
40 PRINT s$: GO TO 10
[/CODE] -
Decimal to Binary stringHi all, Anyone got a less labour intensive BASIC routine than this? Example:- take 170 and convert to a string "10101010" take 4 and convert to a s…
... bit)
[code]
10 INPUT A: LET s$= "": LET N ... PRINT "Incorrect number": GO TO 10
30 LET s$= s ... /> 60 PRINT s$: GO TO 10
[/code]
And ... line
[code]
10 INPUT A: LET S= 0: LET ... -
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
... /> Loop: ld a,(de)
rst $10 ;print next character
inc ... -
RANDOMIZE - still not sure what it does...Whenever I wish a random number I use RND like: 10 LET a=RND*100 20 PRINT a 30 GO TO 0 and "a" will truly be random. But if is do the following: …
... use this code:
[CODE]10 INPUT n;
20 RANDOMIZE n ... /> 30 FOR x=1 to 10: PRINT RND*1000: NEXT x ... this code:
[CODE]10 POKE 23672,0: POKE 23672 ... -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
You should prefix the restart as being hex, either
[CODE]rst 0x10[/CODE]
or
[CODE]rst $10[/CODE]
will work -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
Thanks very much.
That fixed one of the problems, but I still have invalid use of opcode and operands.
[code]org 60000
ld (tvflag),00
LOOP:
ld A,"*"
rst $10
jr LOOP[/code] -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
Thanks both of you. Sadly it still errors:
TVFLAG equ $5C3C
org 60000
ld (TVFLAG),00
LOOP:
ld A,"*"
rst $10
jr LOOP -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
... /> LOOP:
ld A,"*"
rst $10
jr LOOP[/QUOTE]
RST 10h I've always done ... -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
... /> LOOP:
ld A,"*"
rst $10
jr LOOP
[/CODE ... -
SPIN AssemberHi, I'm in the early stages of learning assembler, and am now looking at some tutorials from Toni Baker in ZX Computing: [url]http://wos.meulie.net…
... /> LOOP:
ld A,"*"
rst $10
jr LOOP
[/CODE ... -
Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …
You don't need the RST $10.
HL contains the screen ... .
As you state, The RST $10 is probably not overwriting the ... -
Machine Code for Beginners - error?Dear all, I've picked rather old book called Machine Code for Beginners by Usborne.1983 There's an example inside which claims to print a messa…
Missing a RST #10 as well as preserving HL & DE. After LD A,(DE) Should be...
[code]
PUSH DE
PUSH HL
RST 10H
POP HL
POP DE
[/code] -
Machine Code for Beginners - error?Dear all, I've picked rather old book called Machine Code for Beginners by Usborne.1983 There's an example inside which claims to print a messa…
[quote="karingal;848699"]Missing a RST #10 as well as preserving HL & ... DE
PUSH HL
RST 10H
POP HL
Machine Code for Beginners - error?Dear all, I've picked rather old book called Machine Code for Beginners by Usborne.1983 There's an example inside which claims to print a messa…
[quote="karingal;848699"]Missing a RST #10 as well as preserving HL & ... DE
PUSH HL
RST 10H
POP HL
[/quote]
IIRC, [b]RST $10[/b] already preserves HL, DE ...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…
... were single characters printed via RST $10 (as jonathan's guide uses ... PRINT AT handling for the RST $10 calls dealt with printing each ... to the use of the RST $10 call, ie we set the ...ZX Spin and a question or two......Not really used Spin before since Spectaculator covers everything I need - except now I have need of an easy to use assembler. Downloaded several, n…
... assembler I tried assembled the RST 10 instruction as RET (C9), so ...how to fix instructions on screenI have a problem with my sequencer. I want the top half of the screen to stay fixed but allow the note values to print without pushing the instructio…
... into A, and calling the RST $10 restart point.
I.E ... ]
LD A, charcode
RST $10
[/code]
To be ...how to fix instructions on screenI have a problem with my sequencer. I want the top half of the screen to stay fixed but allow the note values to print without pushing the instructio…
... :
LD A,(HL)
RST $10
BIT 7,(HL)
RET Z
RST $10
INC HL
JR ...ROM PRINT routine issuesHi all, I am using the ROM print routines a lot in my assembly program and I'm experiencing issues. I am changing the system variable DF CC to po…
...
Ld a,(hl)
Rst #10
Inc hl
Jr ... />
Text:
Defb 22,10,10,18,1,16,4,17 ...ROM PRINT routine issuesHi all, I am using the ROM print routines a lot in my assembly program and I'm experiencing issues. I am changing the system variable DF CC to po…
...
Ret z
Rst #10
Inc hl
... br /> Text:
Defb 22,10,10,18,1,16,4,17 ... ,(hl)
Loop:
Rst #10
Inc hl
... br /> ...
Loop:
Rst #10
Inc hl
Start ...Anagram creation - not as easy as it looks?I'm writing a story and I have a mystery villain who is never revealed. My main clue was to have been that every alias he uses is an anagram of the f…
... *PEEK (a+1)
5 INPUT "Names list exact size ";size ... size=FN p(23670)
10 INPUT "Load binary size ";(size);" at ... $
20 POKE 23658,8: INPUT "Name ";n$: IF NOT LEN ...User defined function in Sinclair BASICI'm looking to create a user defined function in Sinclair BASIC to add up numbers being input. This is the program without a user defined function be…
Ok I did it this works :)
[code]
10 INPUT a$
20 LET b=LEN a$
30 LET s=0
40 FOR i to b
50 LET s=s+ VAL a$(i)
60 NEXT i
70 PRINT s
[/code]
Of course your number is only one digitShort program10 PRINT "You know what? I just cannot be bothered any more!" 20 GOTO 10
[code]10 INPUT "Would you like to see a 'Variable not found' error report? (y/n) ";a[/code]z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…
...
jr z,Exit4
rst $10
inc bc
inc ...
jr z,Exit7
rst $10
inc bc
inc ...I live and learnThanks to Einar's ZXDB link I found under the Books folder and English sub directory a PDF file named 'The Century Computer Programming Course for Z…
A bit simple:
10 INPUT a,b,c,d,e
20 LET s=a+b+c+d+e
30 PRINT "Sum is: ";s;" and the average is: ";s/5
Line 10 works in ZX Spectrum Basic, I don't know if it works in other Basic dialect.
