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Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... that I'm surprised the RST 16 routine isn't quick enough ... -
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.
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.
... about how ROM printing routine (RST 16 or RST $10) works, due to ...Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…
... of PRINT AT, only using RST 16.
When in lowerscreen ...New Game(s): Sir Ababol 2 and Sir Ababol DXHere is our own Christmas Present from Mojonia! We weren't going to release these games (at least, by the moment) but we decided just yesterday to fi…
... at'
rst 16
ld a,0 ;y
rst 16
ld ... a,0 ;x
rst 16
plp ... string
ret z
rst 16 ;print ASCII until we get ...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…
... , "*" ; 60004 62 42 7ts
rst 16 ; 60006 215 11ts
jr ... the restart to work... 0x10 = 16 decimal!The magic's goneI dunno, i'm glad the new site is now up and running and most of the regulars are here but there's something missing and i can't quite put my finger …
Falling Blocks - new game from z80 assembly beginner<p>I started learning z80 assembly earlier this year, mostly from reading Jonathan Cauldwell's "How to write ZX Spectrum Games" and from reading arti…
... call and then only use RST 16.
(Or open the channel ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... want an asterisk here.
rst 16 ; display it.
call ... ASCII code for space.
rst 16 ; delete old asterisk.
... xcoord) ; vertical position.
rst 16 ; print it.
ld ... ) ; y coordinate.
rst 16 ; print it.
ret ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... -Xacross,24-Ydown).
'rst' is a quick way of ... start of the ROM, so 'rst 16' does the same as 'call ... 16' (calls the "print a character" ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... ycoord) ; vertical position.
rst 16 ; print it.
ld ... ) ; y coordinate.
rst 16 ; print it.
ret ... want an asterisk here.
rst 16 ; display it.
call ... ASCII code for space.
rst 16 ; delete old asterisk.
...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... though the use of rst 16 after it means the ... ycoord) ; vertical position.
rst 16 ; print it.
ld a ... xcoord) ; y coordinate.
rst 16 ; print it.
ret[/ ... [/quote]
"rst 16" is equivalent to "call 16". The ROM supplies ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... ,'*' ; want an asterisk here.
rst 16 ; display it.
call delay ... ; ASCII code for space.
rst 16 ; delete old asterisk.
call ...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. …
... for the reply. I know RST 16 wasn't needed - I was ...How to Write ZX Spectrum Games - Jonathan CauldwellHello, I'm trying to improve my very basic level of assembler by reading the Jonathan Cauldwell guide. I'm fine with the basics LD, CP, and JP,…
... an asterisk here.
rst 16 ; display it.
call ... code for space.
rst 16 ; delete old asterisk.
rst 16 ; print it.
...TommyGun's getting a Debuggerhttp://youtu.be/B_kZVRvYV98 I have always wanted to debug the programs I write in TommyGun using TommyGun instead of the debuggers in emulators. …
... this.
I hi-jacked rst 16 (rom print - i never use ... (8 bit) or 2 bytes (16 bit) variable.
You can ...Can't Get My Simple Code To RunHello again, I'm trying to run the following simple code: [code] org 32768 main ld b, 21 ; x coordinate is …
... control code for AT.
rst 16 ; print it.
... xcoord) ; vertical position.
rst 16 ; print it.
ld a ... ycoord) ; y coordinate.
rst 16 ; print it.
ret
Can't Get My Simple Code To RunHello again, I'm trying to run the following simple code: [code] org 32768 main ld b, 21 ; x coordinate is …
... for the whole loop
rst 16
jr ploop ; do it ... equ 15
ink equ 16 ; ink,x (0-7)
A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... EQU 5633
CC_INK EQU 16
CC_PAPER EQU 17
RET Z
RST 16
JR PRINT
RET ...predetermined number of loops in assemblerhi, i have this code that i have already written org 40000 ld c,33 ld (23612),a ld a,c rst 16 inc c jp 40001 but i only want to loop i…
ok, this works nicely.
org 40000
ld b,120
ld (23612),a
ld c,33
loop ld a,c
rst 16
inc c
djnz loopcounting in assembleri have this program which cycles through the character set. how do i do this with numbers say 0 to 65535? org 40000 ld b,120 ld (23612),a L…
... /> rst 16
ld a,0
rst 16
ld a,0
rst 16 ...Dynamite Dan II - Island 6 - HELP!Hi all, can someone possibly create a snapshot of Island 6 (car park island) on Dynamite Dan II for me please? I'm trying to work out why half the…
... (key reading routine)
rst 16 ; PRINT character
jr print2 ... 27792
ink: equ 16
paper: equ 17
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... equ 15
ink equ 16 ; ink , x (0-7 ... 0xFF
ret z
rst 16
; inc b ; ... 1,at,0,16,flash,1,"Screen#1at0,16"
defm ... ,1,flash,1,"Screen#1at1,16"
defb 255
...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... equ 15
ink equ 16 ; ink , x (0- ... 0xFF
ret z
rst 16
; inc b ... ,16,flash,1,"Screen#1at0,16"
defm at,1,16, ... ,1,flash,1,"Screen#1at1,16"
defb 255
