-
'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…
... all.
next_scanline:
push bc ; Free up a register ... />
inc e
pop bc
inc bc
+3 how to detect if a file exist ?Need help. I am making a generic menu to my compilations over the spectrum +3. Exist some way programatically to detect if some file exists on the d…
... ;BC=flag OK
l_bfc6: push bc ; 49094 197 ;save status ...
ei ; 49115 251
pop bc ; 49116 193 ;restore status ...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. …
...
drawArea
push bc
push hl
;first ... />
fillAttr0
push bc
push hl
ld b ... in hl
pop bc
push bc
... />
fillSolidLine
push bc
push hl
ld a ...Obfuscated code ideaThe instructions [b]SUB A[/b] and [b]XOR A[/b] both have the effect of setting the accumulator to zero. The only difference between them is that [b]…
... /> [code]SUB A
PUSH AF
POP BC[/code] sets BC ... = 2, while [code]XOR A
PUSH ... AF
POP BC[/code] sets BC ...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. …
...
drawArea
push bc
push hl
;first ... />
fillAttr0
push bc
push hl
ld b ... in hl
pop bc
push bc
... />
fillSolidLine
push bc
push hl
ld a ...KING OF PONG: Pong revisitedHello everybody. I'm proud to announce you that my last personal project for the ZX Spectrum, "KING OF PONG" is available to download here at WOS si…
... , $0000
b8d6: push hl
b8d7: ld hl ... $c020
b8de: push de
b8df: push hl
b8e0: ... ld hl, $0000
b8e3: push hl[/code]
... /> ld ($fc93),hl
push hl
ld ... ld ($b3f8),a
bbb pop hl
ret
...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. …
... position on screen
push de ;remember to draw ... loop2
pop de
showCursor
push de
... the attribute area
pop de
... /> .loop0
push bc
push hl
ld ... /> djnz .loop1
pop hl
ld c,# ...The Spec-chum 100 Push Ups challengeHi Spec Chums! I found this website last night, which says you can train to do 100 push ups in 6 weeks: [url]http://hundredpushups.com/[/url] It h…
... like it was going to pop. Not sure what I've ... a result of all the push ups, or maybe I've ...The Spec-chum 100 Push Ups challengeHi Spec Chums! I found this website last night, which says you can train to do 100 push ups in 6 weeks: [url]http://hundredpushups.com/[/url] It h…
... like it was going to pop. Not sure what I've ... a result of all the push ups, or maybe I've ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... revamped for speed to use push and pop (and it's 95 ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... /> push bc
ld a,"A"
call print_char
pop bc ... to put down
p_print0 push af
;save off ... values]
p_print1: push hl
push de
push de
;save ... boundary
p_print3: pop hl
;POP one of the Screen ...Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …
... pressed
PUSH HL
CALL BEEPIT ; ... br />
; now to push Our duration Value and multiple ...
PUSH BC
... POP BC
LD A,C
CALL $2D28; Push ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... +249
; push bc
; call print_char
; pop bc
; ld ... off bottom of screen
push bc
;save off Y ... Y\X values used
pop bc
;get the Y ...Sprite MaskingI was looking at the sprites in some games, and noticed they have sprite followed by mask. Usually a row at a time (so the mask is sort of interleave…
... the stack pointer and using push and pop, as I have for ...Sprite MaskingI was looking at the sprites in some games, and noticed they have sprite followed by mask. Usually a row at a time (so the mask is sort of interleave…
... the stack pointer and using push and pop, as I have for ...Sprite MaskingI was looking at the sprites in some games, and noticed they have sprite followed by mask. Usually a row at a time (so the mask is sort of interleave…
You know it does occur to me that that might be it:
load 2 bytes of sprite, shift it push onto stack
load 2 bytes of mask, shift it...
use mask, pop, use sprite.
That works as an algorithm..Machine Code Microdrive File LoaderI've been experimenting with transferring games to run from microdrive. Typically I like to see a loading screen while things are happening, and I li…
... /> ;
main exx
push hl ; preserve return to basic ... ; fetch current error return
push hl ; and preserve
;< ... br /> call main1
;
pop hl ; manipulate sp to handle ... channel
;
push ix
pop hl
add hl ...LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... />
The idea with [b]pop/push[/b] loops is that [b ... ]push[/b] writes two bytes more ...multicolor on 48Kmany people tried multicolor 8x1 on 48K model and ended with maximum width about 18 chars. yesterday i tried [b]8x2[/b] on 48K and achieve 24 char wi…
... LD HL,nnnn/PUSH HL could be faster than POP/PUSH. Must try ...Optimize this assembly?Aiming for Variable*192 -> HL In the first case, I came up with the obvious method - *128 +*64: [code] ld a, (variable) ;13 ld h,0 ; 7 ld l,…
...
[/code]
PUSH then POP is way slower than doing ...Using Interface II joystick in kempston-only gamesHi everyone! It's me again, bothering you with new crazy ideas :) I have recently acquired an Amstrad +2A Speccy with a joystick and built-in Interf…
... this code:
JOYEMUL PUSH DE
PUSH AF
LD A ... 3
OR E
POP AF
LD A,E ...
POP DE
RET
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
...
JR NZ,FA
PUSH DE
LD DE,0008 ... /> POP DE
DEC C
JR NZ,F1
PUSH DE ...
SBC HL,DE
POP DE
CPL
DEC ... :
[FONT="Courier New"]PUSH DE
LD DE,0017 ...
SBC HL,DE
POP DE
CPL
DEC ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... back -6 bytes 20FA
PUSH DE ; Store DE on stack ... DE to HL 19
POP DE ; Restore DE D1
PUSH DE ; Store DE on stack ... 5888d from address ED52
POP DE ; Restore DE D1
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... back -6 bytes 20FA
PUSH DE ; Store DE on stack ... DE to HL 19
POP DE ; Restore DE D1
PUSH DE ; Store DE on stack ... 5888d from address ED52
POP DE ; Restore DE D1
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... back -6 bytes 20FA
PUSH DE ; Store DE on stack ... DE to HL 19
POP DE ; Restore DE D1
PUSH DE ; Store DE on stack ... 5888d from address ED52
POP DE ; Restore DE D1
Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... back -6 bytes 20FA
PUSH DE ; Store DE on stack ... 19 ****** THIS IS WRONG
POP DE ; Restore DE D1
PUSH DE ; Store DE on stack ... 5888d from address ED52
POP DE ; Restore DE D1
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... /> push hl ;11 106
sp3
ld sp, 0
pop ... /> pop bc ;98
sp4
ld sp, 0
push bc ... /> push hl ;106
sp5
ld sp, 0
pop hl ... /> push hl ;106
sp7
ld sp, 0
pop ...Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... the quickest copy is to POP from uncontended memory during the ... of one screen line), then PUSH to screen memory during the ...Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... ]'s suggestion I switched to POP/PUSH. As I said, it's ...Z80 Machine Code Question...Hi Folks, I know not strictly a BASIC question but I have started to learn Z80 machine code - 25 years too late! :smile: I have been reading a book…
... -6 bytes 20FA
200 PUSH DE ; Store DE on stack ... to HL 19
230 POP DE ; Restore DE D1
260 PUSH DE ; Store DE on stack ... from address ED52
300 POP DE ; Restore DE D1
