-
Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... /> #asm
dec e
// dec e
dec e
#endasm
2. The new and expanded c files are then ... step. Eg, zcpp will take a c source file as input and ... to run "zcc -a foo.c" on your c source file. This will ... -
More questions to ponder/argue/ignore as you wish...Just copying some stuff to a memory stick, and I found some old questions I'd intended to post on these forums to provoke debate, that I'd never got …
... your opponent"
2. it's much like music ... ;-)
6. A Tribe Called Quest - Can I ... Journey into the light etc a few things / superstition or ... to buy a console..e.g. gta.. grand turismo , c.o.d ... it's just GTA 1 / 2 .. made 3d.. I was ... -
Help fix this keyboard read program?This code runs in an interrupt routine with DI. What would be the simplest way of making it so it doesn't auto repeat a keypress? [code]keys: ld a…
... /> ld bc,$dffe
in a,(c) ; read keys once right here ... left / right keys
ld c,a ; c = keys
ld hl ... /> inc hl
ld (hl),e
inc hl
ld ... middle, 1 for left and 2 for right.
I ... -
BEEP pitch values for key of G?I've been transcribing a listing which is supposed to include a DATA statement with the pitch values for the key of G. What it's got is: DATA 5,7,9,…
... C[/u]
2 2 1 2 2 2 1
^ ^ ^ ^ ^ ^ ^
C D E F G A B C ... C[/u]
2 1 2 2 1 2 2
^ ^ ^ ^ ^ ^ ^
A B C D E F G A ... ]
2 1 2 2BEEP pitch values for key of G?I've been transcribing a listing which is supposed to include a DATA statement with the pitch values for the key of G. What it's got is: DATA 5,7,9,…
... 40
100 FOR a=1 TO 2
110 BEEP 0 ... )
130 NEXT a
140 BEEP 0.2,s(4+key ... REM C D E F G A B C D E F G A B C
910 REM 1 2 ... /> And set it up as a 2 dimensional array so it can ...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 …
... in DE
add c ;
ld e,a ;
ret ;
... a,(hl)
ld c,0
sra a ;repeat these 2 ... Instructions 8 times
rl c ... br /> .......
ld a,c
ld (de),a
; ...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) …
... /> E-4 1 C#4 - 1
--- - --- - -
--- - --- - 2
A-3 - C#4 - 2
A ...+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…
... /> 60 READ d: POKE a, d: LET a = a + 1
70 IF ... DATA 1,5,0,17,2,0,205,6,1,1 ... /> res 4, a
ld (BANKM), a
out (c), a
ei
ld de, 2 ;Open file if it exists ... /> ld b, d
ld c, e ;BC = result
ret
'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…
...
;input: B=Y,C=X
;output: HL= ... e0
ld l,a
ld a,b
and # ... /> ;input: HL=screen address, A=char
printChr< ... /> ld a,(de)
ld (hl),a
inc e
... inc h
edup
org $-2 ...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…
... you. I've done a 2 step increment down and ... /> srl a
srl a
srl a
ld e,a
e,a
ld a,c
srl a
srl a
srl a
add a,e ...
ld e,a ...Sprite RotatingI was looking (actually at Everyone's a Wally), and noticed that all the graphics for the main characters are left facing, and two characters wide. …
... loop
ld (de), a
inc e
ldi
ldi ... /> ld a, (de)
ld (bc), a
inc c
... time
2) then i use one of ... br /> shift 2px ... call 2 times rr(hl) / inc ... /> shift 6px ... call 2 times rl(hl), dec l ...Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... =4222
A normal level is 39 bytes ... hoodie baddie shooting biscuits
2 - blubbery baddie
3 ... hex
A table at 86OFhex shows levels ... -ords are always 2,4,6,8,A,C or E.
a list of levels that have ...Keyboard demoHere's a preview of a new keyboard for the special fx engine. Press any key to start/restart. [url]http://dl.dropbox.com/u/9498358/fire_keyboard.sn…
... /> add a, a
add a, l
ld l, a
ld e, (hl ... -1
; second byte is 2 for black key and 4 ... /> defb $06, $04 ; C
defb $07, $02 ; C#
defb $07 ... -1
; second byte is 2 for black key and 4 ...Sorting an array...Hi Folks, Over the weekend I had a play with sorting algorithms - takes me back to my student days! :-o My first try was with the good old Bubble S…
... br /> ld a,c
LINE50: add a,(IX+2) ;A =t=j+m ... BASE ADDRESS
ld e,(IX+0) ;E =j ROW j INDEX ... BASE ADDRESS
ld e,(IX+3) ;E =t ROW t INDEX ...Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
... /> LD D,A
LD E,L
LD A,(ATTR)
... /> RRCA
ADD A,C
LD L,A
LD (PRTPOS), ... ,0 ; #16 indicate next 2 bytes will row and column ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... SNA file and download PDS/2 romfile functions. I still ... able to develop using PDS/2 (aka P2) it ... found in a zero padded 64K PDS/2 romfile and ... c),a
ld bc,49149
xor a,a ; Input mode
out (c),a ... br />
ld a,e
or a,d
jp nz ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... off period of about about 2 million cycles after receiving data ... developed using PDS/2 and a modified version the O.C.P Full ... (c),a
exx
ld a,14 ; I/O
out (c),a ...
out (c),e
exx ; 26
and a,a ; 4
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…
... /> ld (ix+SPR_def+0),e ; LOW
ld (ix ... br /> ld c,(ix+SPR_ypos)
ld e,(ix+SPR_def+0 ... F D S A
; 251 T R E W Q ... a,(254)
and a,2
jr nz,no_left
ld a,c ... frame table
ld e,(hl)
inc hl< ...Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... br /> dec a
jr z,write ; 2
dec a
... />
; ------------
fail ld a,2 ; RED
error out (254 ... (c),a
exx
poll in a,(c) ; Wait
and a ... hl
ld a,e
or a,d
jp nz ...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 …
...
ld d, (hl) ;parameter 2
inc l
ld ... , peeb1
ld a, c
xor 16
ld c, a
out ... (254)
ld l, e
peeb1 ... /> ld a, c
xor 16
ld c, a
out (254), a
Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
... ),c
ld a,254
ld i,a
im 2 ... tu01 ld a,(de)
inc e
ld l,a
ld ... tu02 ld a,(de)
inc e
ld l,a
ld ... tu03 ld a,(de)
inc e
ld l,a
... tu04 ld a,(de)
inc e
ld l,a
...Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... 13 BYTES)
Pass 2:
23296 - 25343 ... start address.
2) A 88 BYTE depack and ... Cybernoid's case, pass #2 shows location 65194. It ...
ld a,c ; Check for zero?
... br /> .next: ld a,e ;
cp a,l ;
jr nz ...Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
... /> db 121 ; ld a,c
db 176 ; or a,b
db ... /> db 123 ; ld a,e
db 189 ; cp a,l
db ...
cmp byte [ebp+SNA_int],2
jne go_dos ; ERROR!
mov byte [reg_pc+2],0 ; NOP
; ------------
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…
... /> ld (ix+SPR_def+0),e ; LOW
ld (ix ... br /> ld c,(ix+SPR_ypos)
ld e,(ix+SPR_def+0 ... F D S A
; 251 T R E W Q ... a,(254)
and a,2
jr nz,no_left
ld a,c ... frame table
ld e,(hl)
inc hl< ...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…
... /> ld (ix+SPR_def+0),e ; LOW
ld (ix ... br /> ld c,(ix+SPR_ypos)
ld e,(ix+SPR_def+0 ... F D S A
; 251 T R E W Q ... a,(254)
and 2
jr nz,no_left
ld a,c ... sprite frame table
ld e,(hl)
inc hl< ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... read from
trig IN A,(C)
AND 16 ; Trigger ... you are, you are missing 2 points:
[LIST=1]
A,(C)
AND E ; any register that doesn ... trig ; btw: perhaps IN A,(port#) sets a flag that you can ...Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... e,a
add hl,de
ld a,(hl)
xor c ... ),hl ;the above 2 lines is a fix by Digital Prawn ... hl ;the above 2 lines is a fix by Digital Prawn ... ),a
ld a,(ix+2)
rra
ld (ix+2),a< ...
defw 16448 ;row 2
defw 16704
defw ...Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... for the interrupt, runs bank 2, waits again, then loops ... in 16 rows of 2 bytes i.e.
; b1,b2 ... br /> ld a,(hl)
add 2
ld (hl),a
... 0,1
db 2,10,5,2
db 3, ...
ld a, c
and 7
ld e,a
ld ...yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... ;; d=key code 1, e=key code 2
;; affects
... " keys
scanline: in a,(c) ; read kbd
or ... endofscan
keytoe: ld a,e
cp 0
... ','w','e','r','t'
.byte '1','2','3',' ... ','W','E','R','T'
.byte '1','2','3',' ...
