-
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…
... /> ld hl,tad_asc
ld de,#4000
filltab push de
ld (hl),e ...
inc hl
ld (hl),d
inc ... hl
inc d
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…
... /> ld hl,PtsTab
ld a,#80
lp_mpt1 ld (hl),a< ... /> and #1f
ld (hl),a
inc l< ... ld b,#c0
lp_mpt3 ld (hl),e
inc h
ld (hl ... -
machine code basicsWondered if anyone can help me out. I have been playing round with some disassemblers (Zeus). And Machine code loaders. All I want to do is print my…
... 50000
LD HL,message
loop: LD A,(HL)
OR A ... br /> RST 16
INC HL
JR LOOP
...
(main screen) with LD A,2 CALL #1602 -
Calling all coding munkeez...Having spent the last 8 years as a Windows application developer I thought I'd try my hand at a bit of Z80 speccy coding - something I missed out on …
... /> Like
LD HL,16384
LD A,(HL)
must work ... like this:
LD HL,16384
LD ... A,(HL+higherload)[/quote]
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... />
......dec hl
searchfor0: inc hl
......ld a,(hl)
......inc a ... 8 bits at once
......ld (hl),a
nextbyte: dec b ... 8 bits at once
......ld (hl),a
......jp nextbyte ;jump ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... LD C,E
LD HL,TABLE-1
PRINT LD B,(HL)
INC HL ...
LD A,(HL)< ... br /> RST #10
LD A,(HL ... br /> CALL #22B1
LD A,(HL)
RST #10
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
...
........LD HL,TABLE-1 ; esc.code table
PRINT...LD B,(HL) ; B ... HL ; and HI returnbyte
........LD A,(HL)
........RST #10
........LD A,(HL ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... .
LD (HL_Store),HL ; Store HL in Store.
LD D,B ; Store ... in HL' and restore original HL.
POP HL
EXX
LD HL,(HL_Store ... )
LD B ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
...
.....dec hl
searchfor0: inc hl
.....ld a,(hl)
.....inc ... was 0 originally)
.....ld a,(hl)
.....and c ; ... once
.....ld (hl),a
.....inc hl ;move onto next ... (in cy)
.....ld a,(hl)
.....djnz nextbyte
Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... 20 LD (HL_Store),HL ; Store HL.
800B 50 4 LD D ... LD HL,(HL_Store) ; Restore original HL.
8025 7E 7 Next_byte LD A,(HL ... br /> 803A 77 7 LD (HL),A ; Store byte ...Machine CodeOk i had a spectrum when i was younger and only used it for playin games and typing simple BASIC programs - i mean really simple! Things like 10 Pri…
... 50000
LD HL,message
LOOP LD A,(HL)
OR A ...
RST 16
INC HL
JR LOOP
message ...Spectrum ROMI downloaded some text files (they are actually the spectrum ROM files but in text) which can be compiled using TASM (or soemthing). I read on WOS th…
... />
LD HL,GRAPHIC
LD B,10
LOOP LD A,(HL)
RST ... 16
INC HL
DJNZ ...Merry ChrysanthenumTHE COMPUTERS FIRST CHRISTMAS CARD jollymerry hollyberry jollyberry merryholly happyholly jollyjelly jellybelly bellymerry hollyheppy jol…
... #8000
LD HL,text
loop LD A,(HL)
CP #FF ...
RST #10
INC HL
JR loop
text ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... />
[code]
LD HL,ERRORMESSAGE
LD A,(HL)
OR A
LD HL,(.....) ; IN BASIC LAST LINE EXECUTED 23621????
LD (23618),HL
LD A ... ,(23623) ; LAST STATEMENTNR EXECUTED (23623????)
LD (23620 ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... />
[code]
LD HL,ERRORMESSAGE
LD A,(HL)
OR A
LD HL,(.....) ; IN BASIC LAST LINE EXECUTED 23621????
LD (23618),HL
LD A ... ,(23623) ; LAST STATEMENTNR EXECUTED (23623????)
LD (23620 ...Run BASIC program by R. USR xxxxxGuys, please help. Suppose I have BASIC program in my Spectrum 48K starting with line 10. I'd like to start it by RANDOMIZE USR xxxxx. Which paramete…
... />
[code]
LD HL,ERRORMESSAGE
LD A,(HL)
OR A
LD HL,(.....) ; IN BASIC LAST LINE EXECUTED 23621????
LD (23618),HL
LD A ... ,(23623) ; LAST STATEMENTNR EXECUTED (23623????)
LD (23620 ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... do something like:
LD L,shiftreg ; thing we're ... a 256 boundary table
LD A,(HL) ; get shifted value from ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... to the screen location POP HL, you can shift (well ... left at least) with ADC HL,HL, using the previous carry from ... the rightmost bit and PUSHing HL back onto the screen ... BC, IX, IY, BC',DE',HL' and rotate all in sucession ... 50h SUB A,16 LD L,A LD SP,HL using A to ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... : di
ld (temp_sp),sp
ld sp,hl
ld sp,ScrAddr2 ... lscrsp10
ld hl,(temp_sp)
ld sp,hl
ei
Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... , along these lines:
; hl is base of shifting table ... />
pop l
ld a,(hl)
and (ix+0)
pop l
or (hl)
ld (ix+0),a
inc ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... , along these lines:
; hl is base of shifting table ... />
pop l
ld a,(hl)
and (ix+0)
pop l
or (hl)
ld (ix+0),a
inc ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... /> pop l
ld a,(hl)
and (ix+0 ... l
or (hl)
ld (ix+0),a
ld l,c
ld a,(hl)
and ... (ix+0)
ld l,b
or (hl)
ld ...compatibility between ZX computers?Hey all, I'm new here :) I was wondering about compatibility between ZX computers. Is it possible to run a game made for ZX80 on a ZX Spectrum? Or a …
... to 'error'routines like
LD A,(HL)
RST 8 etc ... ...
If HL is i.e. #4000 then ...Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... hl
ld (nnnn), hl 6144/2 times
pop hl
ld (nnnn-2), hl ...
...
pop hl
ld (nnnn-6142), hl ...
ld sp, 0
AssemblersOk, two quick questions for you guys: 1) Can anyone give me a link to the Prometheus Assembler ? 2) Does anyone know of an assembler that satisfies …
... 50000
ld hl,text
loop ld a,(hl) ; fetch data
inc hl
rst 16
jr ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... Load Accumulator with 3
LD (40000),A ; Store contents ... of lives:-
LD A, (40000) ; Load Accumulator ... to game over routine
LD (40000),A ;
< ... /> 8E71 21 E0 D7 LD HL, D7E0
8E74 22 ... EF AD LD (ADEF),HL
At ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... />
E8EB 2A 7A E9 LD HL, (E97A) ;the code you see ...
E907 21 E7 03 LD HL,03E7 ;make sure
no ... /> EA24 E5 PUSH HL
EA25 2A 44 EA LD HL, (EA44) ;take ... change the first instruction LD HL, (E97A) to LD HL,0000
LD HL,0000128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
...
DI
LD BC,32765
LD HL,49152
LOOP: OUT (C),D
LD A,(HL ... )
OUT (C),E
LD (HL), ... ,LOOP
LD A,(23388)
OUT ( ...help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
... :
LD A,normalbyte
LD H,tablehighbyte
LD L,A ... ; tablelowbyte
LD A,(HL) ; bada ...
