-
+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…
... = current stack pointer
push bc
pop ix ;IX = entry address ... ;SP now equals chk
push de ;First word on stack ...
ei
push ix
pop hl ;HL = entry address ...
out (c),a
pop hl ;HL = old stack pointer ... -
+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…
... , return value = 1
48941 PUSH BC ;store return value
48957 POP BC ;Set back our return ... -
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…
... put down
p_print0 push af
;save off ... /> jr c,p_print1
pop af
ret
... Y values]
p_print1: push hl,de,de
... boundary
p_print3: pop hl
;POP one of the Screen ... a merge]
p_print4 pop de
inc d ... -
Assembly OUT commandHello, im trying to send a signal to the output using this command. LD A,2 OUT (0FEh),A ---> This will set the border colour to RED The problem i…
... '
so1 PUSH DE ;now loop
PUSH BC
PUSH HL
POP HL
POP BC
POP DE
INC ... -
Rom Routines list ?Exist some document that show detailled the routines on the spectrum ROM ? Ad for the Spectrum +3 ? are they the same or exist more ? Example i was …
but always when i call a ROM routine i must do the same pushes and pops ? The same ?
push bc
ld bc,#5d70 -
'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…
... b,2
loop
push bc
ld a,0 ... $0c0a ;print the message
pop bc
djnz loop
'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…
...
printChr
push hl
push de
ex de ...
org $-2
pop de
pop hl
inc l ...Which assembler do you recommend to a (complete) newbie?OK, I am re-dusting my assembler books and want to re-dig into the Wonderful World of Assembly. Just wondering which assembler to go with. I reme…
... ; (etc)
PUSH BC
PUSH DE
PUSH HL
asm
POP HL
POP DE
POP BC
How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
The draw routine destroys the alternate HL register (HL'), not the main one.
So instead of
push hl
...
pop hl
you need to do
exx
push hl
exx
...
exx
pop hl
exxHow works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... />
[CODE]
exx
push hl ; preserve value of HL ... stack instructions)
exx
pop hl ; restore value of HL ... first thing they do is pop values into registers. To use ...How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... />
[CODE]
exx
push hl ; preserve value of HL ... stack instructions)
exx
pop hl ; restore value of HL ... first thing they do is pop values into registers. To use ...How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... /> [/QUOTE]
You can push your parameters onto the calculator ... return-stack, accessed using the PUSH and POP instructions); but in this ...'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..
