-
what are the advantages and disadvantages of using.........what are the advantages and disadvantages of using an emulator rather then using a zx spectrum? octave
... , gave me some trouble with a snowwy interrupt routine. In the ... .
i.e.
LD A,100
LD I,A
RET -
ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
...
jr skip1a
skip1 ld a,l ; we need to check ...
ld a,h
dec a
and 0F8h
ld h,a ; else ...
ld a,h
dec a
and 0F8h
ld h,a
; ld a,8
; and a,a - x2 every time you ... -
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 …
... more probable so jp
......ld a,(hl)
......and c ... for the next iteration
......ld a,c
......or (hl) ... /> ......ex af,af'
......ld a,(hl) ;again we prepare the ... ......rra
......ld c,a
......ex af,af'
......ld a,c
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 …
... I was thinking of a byte-wise method after building ... If however you can find a shorter code, then I ...
NLINE LD C,E
LD HL,TABLE-1< ... HL
LD A,(HL)
RST #10
LD A,(HL)
... B
LD A,B
CALL #22B1
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 …
... returnbyte
........LD A,(HL)
........RST #10
........LD A,(HL) ; ... B = 192 for
........LD A,B ; screen 191
........ ... CALL #22B1 ; calc screenadress
........LD A,(HL)
........RST #10 ; LPRINT ...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 …
... number in E.
LD A,B
OR A ; Load zero flag ... back 1.
LD A,(HL) ; Load A with first byte with ... E
DJNZ Move_bit
LD A,(HL)
XOR E ; Reset ... /> Process_byte
LD A,(HL) ; Get byte.
LD C,A ; Store byte in ...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 …
... inc hl
.....ld a,(hl)
.....inc a ;test for #ff
.....ld a,(hl)
.....and c ;okay ... 8 bits at once
.....ld (hl),a
.....inc hl ;move ... previous byte (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 …
... 7E 7 LD A,(HL) ; Load A with first byte with a reset bit ... .
8025 7E 7 Next_byte LD A,(HL) ; Get byte.
... Move_bit
8038 7E 7 LD A,(HL)
8039 AB 4 ...Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …
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…
... print last value(=BC)
LD A,(BC)
CALL STACKA ; idem ... BC
CALL PRINTSTACK
LD A,(BC)
CP 31
NOPR INC BC
LD A,13
RST 16
adding colourThis my sound like a real stupid Q but when programing a picture how do i add colour like filling in shapes with colour. What kind of programming sh…
... /> org 60000
ld hl,#5800
ld bc,768
l1 ... ld (hl),255
inc ... hl
dec bc
ld a,b
or c
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…
... , but I will give hime a simple printing routine in MC ... />
LD HL,GRAPHIC
LD B,10
LOOP LD A,(HL)
A
DEFB 145 ; UDG-B ...tzx-ingjust to let you guys here know that i have just started to tzx my complete collection of games and will check the MIA/STP lists for any i have but it…
... tzx using the [B]maketzx -a -r -f [I]gamename[/I][/B ... ] but got this command in a batch file so i dont ... change gamename to [B]maketzx -a -r -f %1%[/B] save as ... send but this will take a bit of time.
i ... have found a few covers in WOS that ...tzx-ingjust to let you guys here know that i have just started to tzx my complete collection of games and will check the MIA/STP lists for any i have but it…
... using the [B]maketzx -a -r -f [I]gamename[/I][/ ... change gamename to [B]maketzx -a -r -f %1%[/B] save ...
I often use a combination of -a, -fr1, fl600.
< ... br /> I always log to a WAV file just in case ... the way.
-a doesn't always work, but ...My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... memory adressing commands use the LD A,A, LD B,B etc... op ... that I meantioned was for a small, powerful, portable/handheld ... computer running on a z80 architechture. There has ... small device storage options - a device called the Dataplay that ...Spectrum edge connectors and 'Dataman Softy S4'Hi, I moved this from the sales thread because it seems more appropriate...anyway... I was twerping around the idea of turning a Spectrum into a we…
... 8000
LD A,#FD
LD I,A
LD HL,#FD00 ; TABLE ...
LD B,0
FILL LD ...
MY_PROG PUSH HL
LD HL,#4000
INC (HL ...New SPIN 0.3a releaseHi all, here's the next version - mainly a maintenance release, with new bugs :) Here's what's new: V0.3a - Bugs and more tapes -------------------…
... /> EF15 DEFW #15EF
3E20 LD A,#20
D7 RST #10 ... opinion the #15 is only a remaining component of the DEFW ...ZX-2-PC Interface : Is it dead ???Certainly not, but I had some problems getting the EPROM-reader constant. In my former threat I stated that it worked, well, it read ROM-values but n…
... port. This interface loaded a game in app. 40 ... at #0556 to load a block of bytes and at ... OUT 14. This also gives a BORDERing effect, which makes ... ; START OF DATA
LD A,255 ; Signal of DATA-byte ...
LD DE,16384 ; LENGTH OF DATA ...Merry ChrysanthenumTHE COMPUTERS FIRST CHRISTMAS CARD jollymerry hollyberry jollyberry merryholly happyholly jollyjelly jellybelly bellymerry hollyheppy jol…
[quote]
On 2002-12-23 12:52, secarica wrote:
Disclaimer: I have not tested it :)
[/quote]
Could do with a couple of extra lines of code at the start of the routine.
LD A,2
CALL #1601
:)Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... can't really give a working example as I ... br /> DI
LD HL,HIGHBYTE ; table
LD DE,HIGHBYTE + 1 ...
LD BC,257
LD A,VECTOR ; IM2 vector ...
LDIR
LD I, ... />
As to a suitable place for the RAMTOP ...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... br /> DI
LD HL,HIGHBYTE ; table
LD DE,HIGHBYTE + 1 ...
LD BC,257
LD A,VECTOR ; IM2 vector ...
LDIR
LD I, ... that you would make a Z80-error.
... must be
LD I,A
;)Z80 AssemblerSome of you may know that I'm working on a Z80 assembler. I thought I'd start a thread so I can see what people think and what they might want to see…
Ideas: how about macros? (A predefined set of instrunctions that ... (ignoring numbers, but showing in a scrollable side bar all possible ... shows all possible combinations from LD A,A to LDIR).
Export function ...Z80 AssemblerSome of you may know that I'm working on a Z80 assembler. I thought I'd start a thread so I can see what people think and what they might want to see…
... Ideas: how about macros? (A predefined set of instrunctions that ... /> LD BC,@@3
LD DE,@@2
LD HL,@@ ... finished I would provide a set of libraries ... shows all possible combinations from LD A,A to LDIR).[/quote]
LD the editor it would ...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…
... from out MC
LD A,65
RST 16 ; PRINT ... A
JP 8108 ; run BASIC ...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…
... from out MC
LD A,65
RST 16 ; PRINT ... A
JP 8108 ; run BASIC ... need that to finally finish a project I started 16 or ... contribute. Unfortunately I have forgotten A LOT of my spectrum specific ...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…
... from out MC
LD A,65
RST 16 ; PRINT ... A
JP 8108 ; run BASIC ...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…
... /> 23613/23614 to a vector-adress,
In ... code]
LD HL,ERRORMESSAGE
LD A,(HL)
OR A
...
PRINTREADY:
LD HL,(.....) ; IN BASIC LAST ... LD (23618),HL
LD A,(23623) ; LAST STATEMENTNR EXECUTED (23623????)
LD (23620),A ...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…
... /> 23613/23614 to a vector-adress,
In ... code]
LD HL,ERRORMESSAGE
LD A,(HL)
OR A
...
PRINTREADY:
LD HL,(.....) ; IN BASIC LAST ... LD (23618),HL
LD A,(23623) ; LAST STATEMENTNR EXECUTED (23623????)
LD (23620),A ...
