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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 …
... print to the screen via RST 16 then the characters will inherit ... -
'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... ROM-routine is done with RST 16
So Hello World ... ,(hl) fetch next character
rst 16 do the actual print
16-21 -
'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... ,(hl) fetch next character
rst 16 do the actual print
ret z
rst 16
inc hl
jr ...'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
[QUOTE=Winston;448233]
It's amazing how many ways there are to write a null-terminated string print routine :)
[/QUOTE]
[code]
xor a
or (hl)
ret z
rst 16
[/code]Howto paint a squared zone of the screen ?You know what guys ? i begin to love this languaje. Cant understand why not put more effort on the 80's to learn it :( because it is really speedy. …
... ;AT
rst 16
ld a,d ;X
rst 16
ld ... a,e ;Y
rst 16
.loop0 ... 255? then all printed
rst 16
jr .loop0
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... opcode
rst 16
ld a,y-val
rst 16
ld ... a,x-val
rst 16
ld ...IF and control flow in machine codeHi everyone, Basic has a nice control flow like if statements. How can these be done in machine code since i cant find anything thanks
... ,48 ; make it printable
rst 16 ; do print
pop af ...designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... giving the ability to address 16 different registers (0-F) - if you ... a mandatory 4 bits for 16 registers. The Z80 generally only commits ... bits for 8 (and not 16) addressable registers.
4) Call your ... the Z80 and (b) such registers can be very useful in ...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…
... added
LD A,"."
RST 16
and deleted these from ...Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
... kind of ROM based code, RST 16 (?), but can that print more ... 255
ret z
rst 16
inc hl
jr ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... 255
ret z
rst 16
inc hl
jr ... /> text defb 22,6,15,16,4,18,1 ; AT 5 ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... of genuine general purpose registers over CISC features. After ... Having to constantly shuffle registers around to make sure the ... comparison, the ARM with 16 registers, hardware multiply, a barrel ... very large number of registers, with limited addressing modes ...Printer Printing Problem (assembler)I've a program that outputs to the lower screen at various places, using a combination of calls to RST $10 plus OUT-NUM-1 and PR-STRING. It also call…
Show us your code.
The call channel routine is OK, but do you use the RST 16 to (L)PRINT?Time difference for jumps and calls?Just interested (and possibly trying to distract myself from the more pressing problems in my sprite routine) and willing to risk a potentially daft …
... get some background on that RST 16 I used so much.New game! Nanako in CJMC for ZX81!Yup, that's true. We've been busy in crafting a nice, small, simple library to code games in text mode (this is, standard, unexpanded) for the 16K ZX…
... on a routine to replace RST 16 to use with UDG and ...Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…
... 62 17
RST 16 ; 27929 215
;RST 16 is the standard ... L ; 27933 125
RST 16 ; 27934 215
CALL ... br /> LD A, 16 ; 27944 62 16
RST 16 ; 27946 215
RST 16 ; 27951 215
CALL ...Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…
...
LD A, 16 ; 28735 62 16
RST 16 ; 28737 215
LD ... A, L ; 28741 125
RST 16 ; 28742 215
CALL 7341 ...Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …
... A,22 ;AT INSTRUCTION
RST 16 ;FAST CALL, don't know ... SCREEN)
RST 16 ;
LD A,6 ;COLUMN
RST 16 ;
ld ...Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …
... A,22 ;AT INSTRUCTION
RST 16 ;FAST CALL, don't know ... SCREEN)
RST 16 ;
LD A,7 ;COLUMN
RST 16 ;
ld ...Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …
...
This means using more RST 16 Control Codes. I avoid the ... ld a,16
rst 16
ld a,7
rst 16
... ld a,17
rst 16 ...
ld a,4
rst 16 ...Print TextHow do i print text on the bottom left row(memory location in attribute 23295) of the screen in assembly? I understand the parts better on paper and …
...
ld a,16 ;set ink colour
rst 16
ld a ... A,22 ;AT INSTRUCTION
RST 16 ;FAST CALL, don't know ... SCREEN)
RST 16 ;
LD A,6 ;COLUMN
RST 16 ;
ld ... ]
These codes before RST 16 or in the defbs of ...Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
(part of) screen to UDGHere is a routine to copy a Y,X-position on screen to a UDG. 0<=y<=23 0<=x<=31 144<=udg<=165 (UDG "A" to UDG "U") [code] ; start code with ; PRINT …
... set back by a simple RST 16 of the valid UDG.Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…
... color control code
RST 16 ; fast call
... color control code
RST 16 ; fast call
RST 16 ; fast call
RST 16 ; fast call
...Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…
... color control code
RST 16 ; fast call
... color control code
RST 16 ; fast call
RST 16 ; fast call
RST 16 ; fast call
...User Defined GraphicsCan someone please give some very simple code for a displaying a UDG at a location on screen? Any assistance would be greatly appreciated. Sincerely…
... routine for printing chars (the rst 16 thing) just using the char ...
