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Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... $2da2 ;FP-TO-BC
push bc
ld ix,16384 ... /> call $2d2b ;STACK-BC
pop bc
bit 5,c ... ,(hl)
ld (de),a ; copy byte
ld (hl),0 ... -
Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... number & attribute copy options it also allows ... old att address
push hl
ld a,( ... A =old attributes
push af
bit 0,(ix ... ld (bc),a ;copy attributes
NOATTR: pop de ;DE=old ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... change the addresses where you copy it from. There are a ... using the last word you POP from each line as the ... you've scrolled a whole block, a whole row has been ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... /> loop ld c,255
pop de
ldi
ldi ... /> ld b,7
slp2 push bc
call sprite
inc ix
pop bc
djnz slp2
sprite ld hl,block
ld d,(ix+1 ... a
inc hl
pop de
call nextlinedn
number padding functionI wrote a number padding function in BASIC a while ago, but when I came to want it again I couldn't find it, so I've done this enhanced [url=http://w…
... br />
GOTDP: push de
pop hl
add hl ... br /> FINDA: push bc
push de
pop hl
cpir ...
pop bc
ret
;copy ...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... command is a completed code block, so it is your risk ... versions, I suggest adopting the POP/PUSH method instead, even for generated ... both options to access parameters (POP/PUSH or IX), notice you ... optional for native routines to PUSH parameters back to the ...In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... about POP instead of LD IX, there are two code block ... top address
POP IX
PUSH BC ; place the ... INC SP
PUSH HL
POP IX ; the old IX ... restored
PUSH DE ; ...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 push bc
push hl
push de
push af ... br /> NotNewLine pop de
pop hl
pop bc
... registers? Yes
Block Graphics/UDCs? No
SUPER INPUTA couple days ago I searched for an "INPUT string" routine that I could use in Assembly programs and supported multiple lines, but I found none. Thus…
... br /> [CODE]EDIT: push hl
push bc
ld a ... SET_WORK (reset workspace)
pop bc
push bc
inc bc ... jr z,NOTEXT
ldir ;copy initial string to INPUT workspace ...Multiply the value of 'a' by 5Is there a way of multiplying the value of 'a' by 5? I've tried 'add a,a' etc. but only get multiples of 2...
... ;639573]Anyway, I guess PUSH HL, POP DE is our best option ... as opposed to 21T for PUSH HL : POP DE . I'll generally ... immediate 16-bit register copy, and PUSH rr : ... : POP rr for a delayed ... copy or a "save until later ...64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... from left-to-right, to copy up a line in segments ... far, which is to POP HL from the source data ... changing SP and doing a PUSH. You can also use ... by using LD instead of POP to fetch the data from ... problem is the fastest operations (PUSH) fill right-to-left when ...64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... LD SP,(CurrentLineAttrs)
POP HL
LD (MV0 ... 256+15
PUSH HL
POP AF
PUSH HL
POP AF
EX ... PUSH IY ;copy MV11
PUSH IX ;copy MV10
PUSH AF ;copy MV9
PUSH BC ;copy ...64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... /> POP AF ;MV9
POP IX ;MV10
POP IY ;MV11
POP ... /> PUSH IY ;copy MV11
PUSH IX ;copy MV10
PUSH AF ;copy MV9
PUSH BC ;copy ...Play command on divideHi, i thought I'd have a quick go on divide seeing as i had an afternoon spare.However,i can't seem to get the 'play' command on the screen?. It see…
... code, but I had to copy the assembly; no problem with ... 40300
MIDIOUT PUSH DE
PUSH HL
PUSH BC
L11A3 ... NZ,L11E7
POP BC
POP HL
POP DE
RET ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... br /> pop af ;
pop de ;
pop bc ;
pop hl ;
cp 144 ; block graphic?
jr c, blgr ... /> call po_gr_1 ; constructs the block graphic
ld hl, ... a ;
pop bc ; restore count
push hl ; save mask ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... call overshiftscratch ;
pop hl ;
push hl ;
call ... pop bc
djnz nextshift
ret
copytoscratch ;copy ...copying between RAM pagesSay I'm storing stuff in RAM pages 0,1,3,4 which gets used in 6,7 (which I am) and I might want to transfer up to 7kb at a time (which I do) and I do…
You could do a copy via the registers, which requires ... fastest means. Adapting an existing POP/PUSH copy routine shouldn't be too ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... stack pointer to do a PUSH scroll, you can page in ... the stack pointer and use POP to copy bytes into registers, then ... the stack pointer again and PUSH to write to it.What Spectrum projects (Software/Games/Utility)(Hardware)(Others) are you working on?So, basically that :) You dont have to give names or more clues if you dont want to ;) Also, if you are working on more than one, you can tell all of…
... [/B] having a go at PUSH scrolling. Don't forget that ... use them for an alternate block pattern for some of the ... same top line is then POP/PUSHed down 7 times, finishing ... screen behind the scanline. The PUSH routine can also be looped ...smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…
... ld hl,(23627) ;VARS
push hl
ld de,(23653 ... /> ldir ;copy by,bx,my,mx to calculator stack
pop bc ... C=sign,my
push bc
push de
call $2307 ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... ]
...you can try copy/paste the link below:
Push ix
Pop bc
Ld ...MEMPTR tests for emulator authorsI've recently been completing my MEMPTR implementation and have written a series of tests in [URL="http://homepage.ntlworld.com/mark.woodmass/z80test…
... :
[code]
PUSH AF+POP AF
PUSH BC+POP BC
LD ... BC,x
LD BC,x+PUSH ... BC+POP BC
EI
copy of the flags register (or ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... :
ldi ; copy literal byte
... restore destination
push hl ; store destination< ... /> ldir
pop hl ; restore source address ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... :
ldi ; copy literal byte
... restore destination
push hl ; store destination< ... /> ldir
pop hl ; restore source address ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... :
ldi ; copy literal byte
... restore destination
push hl ; store destination< ... /> ldir
pop hl ; restore source address ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... :
ldi ; copy literal byte
... restore destination
push hl ; store destination< ... /> ldir
pop hl ; restore source address ...
