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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…
... /> ld e,a
ld a,c
srl a
srl a
srl a
add e
ld e,a
ret[/CODE]
I ... think it's a good ... -
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…
[CODE]com_sound LD A,something
LD C,A
LD B,0
LD HL,190 ...
INC BC ;count
LD A,B ;get flag/counter combi ...
RET[/CODE]
When I was young we did this ... -
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 as i examine in the documents of ... ;; PLOT-SUB
L22E5: LD ($5C7D),BC ; store new x ... in B.
LD B,A ; transfer count to ... LD A,$FE ; 11111110 in A.
The example i ... -
'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…
... are slow and limited. I can't even recall how ... and #e0
ld l,a
ld a,b
and #18 ...
or #40
ld h,a ...
ld b,#00
add ... dup 8
ld a,(de)
ld (hl),a
inc e ... -
'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…
... in rare cases. I see no point to ...
Fill memory routine I've provided is very simple ... /> ld a,(hl) ;get a value from (HL)
ld (de),a ;copy ... bc ;decrement length
ld a,b
or c< ...
In the example I've provided, beginning of the ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... #13).
[code] ld hl,address ;where to put ... the character
ld b,8 ;8 horizontal lines ... in the character, i.e. 8 bytes in memory ... /> xor a ;first line into A
loop
ld (hl),a ;put A into ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... /> Based on this information I've written a small (56 byte) routine ...
ld (23675),a
ld a,91
ld (23676),a
ld hl,stripe_data ... $FF ;terminator[/CODE]
I'm sure this could be ... -
'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…
... bits of E.
ld a, d
rrca ; ... add a, e
ld e, a
; Step 2: I don' ... br />
next_character:
ld a, (bc) ; Read the next character ... a register
ld b, 8
ld a, (hl)
ld (de), a ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... paint it ?
If i understood you well, you meant ... put the character
ld b,8 ;8 horizontal lines ... in the character, i.e. 8 bytes in memory ... /> xor a ;first line into A
loop
ld (hl),a ;put A into ... -
Full ASM code or a mixed solution ?Ok another important question. Building a program in asm, is it interesting that all the program is done in asm or always is interesting for some r…
... guys ?[/QUOTE]
I'm worried that you're ... even suggesting such a thing.
... much faster
[CODE]ld (hl), a[/CODE]
is than ...
[CODE]POKE a, n[/CODE]
you' ... you should seriously consider using a C compiler, like [ ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... /> xor a ;first line into A
loop_udg
ld (hl),a ;put A into ... i set the GDU A...
[QUOTE=set GDU A]define_UDG_a
ld ... /> xor a ;first line into A
loop_udg
ld (hl),a ;put A into ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... the character, i.e. 8 bytes in memory
ld a,#ff ;first ... line into A
or a ;clear carry ... flag
loop
ld (hl),a ;put A ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... the 'OR a' solution.
[QUOTE]ld hl,$4000
i.e. 8 bytes in memory
ld a,$ff
or a ;first line into A
loop_udg_b
ld (hl),a ... ;put A into ... -
How to insert special characters in Basic and ASM ?Look the next picture. [IMG]http://img25.imageshack.us/img25/9479/scode.jpg[/IMG] I dont know how to insert these black and diagonal characters. No…
... !!!!
[QUOTE]ld hl,$4000 ;65383
ld b,8 ;8 ... horizontal lines in the character, i.e ... . 8 bytes in memory
xor a ;first line into A ...
loop_udg_b
cpl
ld (hl),a ;put A ... -
Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…
... /Pages/ComputerGamer1800079.jpg]here[/url]. I disassembled the first block (below ... up a few values and then does a RET.
I then ... 7d LD A,L
7535 32fe5b LD (5bfe),A
7538 3a7b5c LD A,(5c7b ... -
Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…
... way of going about things I've ever seen.
It ... />
LD A,H
LD (5bff)
LD A,L
LD (5bfe),A
I don't even know if ... /> especially with self-modifying code. I wish you luck in getting ... -
Howto paint a squared zone of the screen ?You know what guys ? i begin to love this languaje. Cant understand why not put more effort on the 80's to learn it :( because it is really speedy. …
... /> ld a,b
add a,a
add a,a
add a,a
dec a
ld ... b,a ;in ... /> ld h,a
ret[/code]
Regarding other version. I didn ... -
KING OF PONG: Pong revisitedHello everybody. I'm proud to announce you that my last personal project for the ZX Spectrum, "KING OF PONG" is available to download here at WOS si…
... : ld a, l
bceb: ld ($fc78), a
bcee: ld ($fc77), a
bcf1: ld a, ($ ... ball straight again (or am I missing somert?), certainly better than ... dream of writing. I'm confident a man of Ricardo's ... bytes ;)
Hope I'm not being too cheeky ... -
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. …
... be easier if I'll write a working example of a menu, so ... ] ld a,2
call #1601
ld a,0
ld (cursor),a ;cursor ... de
ld a,(itemsAll)
ld b,a
ld c,0 ;current ... -
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. …
Yes, I've made a few simple games in asm ... . They were bad. In 2000s I only made some utilites, and ... ' key
ld a,(cursor)
ld b,0
ld c,a
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. …
... ( LD (HL),A ) you might XOR the the ATTRs: LD A,n, XOR A,(HL), LD ... (HL),A. This will remove ... some jp's.
Now I was quietly waiting, but curiousity ... -
Merlin has risen from the grave!Those of you following the Merlin saga [thread=29902]over here[/thread] might be slightly interested to know that the program is now available in the…
... in the listing, plus I've added a few more comments, and ... br /> 71bb 3e02 LD A,02
71bd 325e71 LD (715e),A
71c0 ... level one.
I'm concerned about the jumping ... the replacements for missing characters, I'm only uncertain about the ... -
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…
... QUOTE]
I just cut and pasted the ... Here's the code I used, I've changed the ADDs ... code for you. I've done a 2 step increment ... has gone over a Character Boundary i.e. we will ... a
ld a,c
srl a
srl a
srl a
add a ... -
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…
... of Attributes but I thought it would be a complicated routine to ... implement. I was wrong, it ... /> ld a,l
add a,32
ld l,a
ld a,d
adc a ... -
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…
... ? As far as I'm aware, it was a horizontal scroller using ... a version of the Armalyte ... you:
[code]ld a, (hl)
ld (de), a
inc hl
[code]ld a, (hl) ; part of ldi
ld (de), a ; part of ... -
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…
... :
[code]LD A,(HL)
LD (DE),A
INC D
I have for several routines...
I was talking a pair of bytes, mask ... and sprite. I'm not. I'm ... -
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…
... byte popped into D
LD A,(HL)
AND D ; Mask ... ; Sprite data byte here
LD (HL),A
INC L
I have no idea, but probably ... the mask byte first, and I haven't heard any complaints ...
