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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 ... -
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 ... -
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 ... -
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 …
... ) you can use the normal RST 16 for all characters on the ... -
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 ...Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... 5633
CC_INK: EQU 16
CC_PAPER: EQU 17< ... ret z ; so exit
rst 16 ; print the character
... $bf
key_pause_pattern: defb 16
key_quit_port: defb $df< ... br /> key_quit_pattern: defb 16
msg_up: defm CC_AT,7 ...Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... text printing routine that used RST 16, with the ASCII code in ...
ldi ; Using LDI, 16 ticks per byte * 22 = 352 ...New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…
...
CC_INK: EQU 16
CC_PAPER: EQU 17 ... z ; so exit
rst 16 ; print the character
... $bf
key_pause_pattern: defb 16
key_quit_port: defb $df ...
key_quit_pattern: defb 16
msg_up: defm CC_AT ...Newbie says 'Alreet?'Hiya dudes, Just dropping a line to say hello as i've decided at 33 to try and fulfill a long time ambition to write a speccy game in machine code..…
... wrote my first game using RST 16 and udgs, so I'd ...Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... afraid! I managed to use RST 16 quite well, but as you ...Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... br /> ;and again - multiplying by 16. Why multiply this number by ... need to fiddle around with 16 bit
;arithmetic - those ... of...basically just replaces the RST 16 command - I won't ... character just like PRINT....or RST 16)
pop de
;since ...
