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Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... FLAG IS 1, FAST COPY BUFFER TO SCREEN
It is ... /> POP IX
POP IY
POP DE
POP BC
LD SP,HL
PUSH BC
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... /> POP IX
POP IY
POP DE
POP BC
LD SP,HL
PUSH BC
buffer in linear order, which means ... a single frame. A back buffer to display copy should do ...Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... 'll go for the printer buffer option for now. It should ... ] LD SP, HL
POP HL
POP BC
LD SP, HL
LD L, B
LD B, C
LD ...Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... THE SCREEN
LD (STACKV1+1),SP
LD SP,STACCR
LD HL ... /> POP BC
EXX
POP AF
POP DE
POP BC
LD SP,HL
PUSH BC ...Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... SP, where it does this sort of thing:
[code] LD SP, HL
POP HL ...
POP BC
LD SP, HL
LD L, B
LD B, C
LD ...Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…
... buffer is linear (not in screen order) and address is stored in hl ... hl, bc
ld sp, hl
pop af
pop bc
pop de
exx
pop bc
pop ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... a time, not the screen address one double byte at ... the right order on the screen starting one pixel line ... pop bc
pop de
pop hl
pop ix
ld hl,-32
add hl,sp
ld ... 't even scroll the screen in pixel row order ...Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
... remove the push / pop of hl that would be better ... ld hl, copybuff
.nextbuffentry
ld a, (copyptr)
; check for buffer ... br /> add hl, bc
add hl, bc
ld sp, hl
ld b, a< ...
pop hl
ld e, l
ld a, h ...Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... /> add hl,bc ; Table pointer += BC * 2 (Y position)
add hl,bc
ld sp,hl ; SP now ...
ld b,8 ; Height in pixels
line pop hl ; POP screen line ... address from LPT
ld a,l
Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... /> add hl,bc ; Table pointer += BC * 2 (Y position)
add hl,bc
ld sp,hl ; SP now ...
ld b,8 ; Height in pixels
line pop hl ; POP screen line ... address from LPT
ld a,l
Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... /> add hl,bc ; Table pointer += BC * 2 (Y position)
add hl,bc
ld sp,hl ; SP now ...
ld b,8 ; Height in pixels
line pop hl ; POP screen line ... address from LPT
ld a,l
line, plot and circle in whole 256x192 displayhi! are there some way to draw lines, or whatever, in the whole 256x192 display, than just the above 256x176 part? (this is the msx1 version i made o…
...
CALL doplot
POP BC
EX (SP),HL ;fetch counter, save new ... second draw
LD (HL),A ;move to screen
POP HL ;coords
RET ...automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …
... : ld (STACKP),sp ;save stack pointer
ld hl,CHANGE
add hl,bc
ld sp,hl ;point SP ... to list of changes
ADLOOP: pop hl
ld a ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... fiddling with stack)
ld (sstack),sp
ld sp,tad_desc+384 ;okay, i ... push de
ld (hl),e
inc hl
ld (hl),d
inc ... hl
inc d
ld a ...T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... /> LD SP, HL
POP AF
EX AF, AF'
POP DE
POP BC
EXX
POP AF
POP DE
POP BC
POP ... IX
POP IY
LD SP, HL; THE ...Game Programming Source Code & Startup HelpHi there, I'm planning on porting an existing commercial title to the speccy. I'm in the process of disassembling the original code and commenting i…
...
POP BC ; c - mask, b - graphics
LD A,(HL)
AND ...
LD SP,HL ; HL holds address of background graphics
ADD HL,BC ; BC=4; width ...
EXX
POP AF
POP DE
LD SP,HL
PUSH DE ...New assember ideaAs i work with Eclipse IDE in my job i become more and more lazy. This leads me to idea that it is time to left Notepad+Tasm combo behind and move on…
... .sbrk_callee
pop hl
pop bc
ex (sp),hl
.asmentry ... bc
dec bc
ld (hl),c
inc hl
ld (hl),b
inc hl ...
ld hl,40000
ld bc,5000
call sbrk_callee ...FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…
... HL,BC=# of bytes to transfer
ld hl,(OldSP)
sbc hl,bc
ld sp,hl ... pop hl
ld sp,hl ;restore old stack (HL,DE ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... HL,BC=# of bytes to transfer
ld hl,(OldSP)
sbc hl,bc
ld sp,hl ... pop hl
ld sp,hl ;restore old stack (HL,DE ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... HL,BC=# of bytes to transfer
ld hl,(OldSP)
sbc hl,bc
ld sp,hl ... ;pop hl
ld sp,hl ;restore old stack (HL,DE ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... ld hl,0
add hl,sp
sbc hl,bc
ld sp,hl ;Make HL ...
pop bc
pop de
pop hl
...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…
... /> LD HL,0
ADD HL,SP ; HL equ SP
LD D,0
LD E ...
POP BC ; return address in BC
LD SP,HL ; load the SP by the ... DE
POP HL ; the old IX in the HL
LD SP,IX ; write ...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…
...
POP BC ; return address in BC
LD SP,HL ; load the SP by the ... DE
POP HL ; the old IX in the HL
LD SP,IX ; write ...
POP BC ; return address in BC
LD SP,HL ; load the SP by the ...Getting Unit CHS detail in +3e BASICHello there my fellow WoS'ers I would like to know if there are system VARS or PEEK's that I could use to get the CHS info within BASIC at the mome…
... HERE
ld bc,0 ;starting partition
ld hl,40000 ;address
pop hl ;recover hl
ld e,64
ld d,0
add hl,de ...
out (c),a
pop bc
ld sp,(oldstack)
ret ...
