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Help pleeease "Proving Emulator OpCode flags are correct"So I had a cunning plan... I wanted to write a test harness for Emulators that could "prove" that all opcode flags were correct. I wanted something m…
... need to put 16 million bytes somewhere - how about on a ... ]
DI
LD (st+1),SP
LD HL,0 ;poke ... 0 - 65535
LD SP,0
LD B,8
DJNZ lp2
st: LD SP,0
EI
Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
...
ld sp, ix
pop af ; read 16 bytes
... />
ld sp, iy
push hl ; write 16 bytes
push ... /> incbin "screen.bmp" ; 6144 bytes of in order bitmap
incbin "screen.atr" ; 768 bytes of attributes
org ...about Back to SkoolHi All, Back to Skool today! :) [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000362[/url] I got original tape and make samples for side a …
... offset by 48 bytes and a few bytes of data being different ... /> your WAV side A
LD L, 80 ; 29130 46 80 ... />
WoS original TZX
LD L, 79 ; 29130 46 79 ...ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…
... block I got was 6 bytes, but the 10 byte ... of data, so 4 bytes of some form of pilot ... /> 5CE0 PUSH IX
5CE2 LD BC, 5CE5 ; A little pause ... to the exact point were bytes are loading, and loads an ... indeterminate number of bytes. Yes, it is an ...Store and restore attribute valuesI am needing ideas on how to write a machine code routine that will store/restore (more important to restore) attribute values to the 22528 area. I …
... ,16 area of screen, 256 bytes I think?!
I ... /> push bc
ld bc,16 ;16 bytes is the distanc to ... /> ldi
ldi ;move 16 bytes from the buffer to the ... /> defs 256 ;define space 256 bytes = 0,0 to 16,16 ...about Back to SkoolHi All, Back to Skool today! :) [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000362[/url] I got original tape and make samples for side a …
... TZX did you find had 'LD L,79' at 29130 and ... 'Original release' TZX, I see 'LD L,80' and 'DEC L ... header, and which has the bytes "2E 4F 0F 38 10 ...about Back to SkoolHi All, Back to Skool today! :) [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000362[/url] I got original tape and make samples for side a …
... 28, 1997 and is 82500 bytes long. But the one currently ... and is 82639 bytes long. And if it has 'LD L,79 ...ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…
... /> 16384 INC D
16385 LD E,004
16387 EX ... AF,AF'
16388 LD (HL),D
Jose ... /> 16388 INC D
16389 LD E,004
16391 EX ... AF,AF'
16392 LD (HL),D
... if LD E,004, means it's looking to load 4 bytes ...Store and restore attribute valuesI am needing ideas on how to write a machine code routine that will store/restore (more important to restore) attribute values to the 22528 area. I …
... REM initialise: dd needs 512 bytes
POKE 23660,FN ... rr c
ld hl,22528
ld de,(23660) ;(S ... de,hl
COPY: ld bc,512
ldir
bytes
DIM s$(512): ...Outrun Europa - In colourAre there any coder's willing to see if we can put the colour into this game as originally intended?
... ) read attribute
b) 24905: LD A,7 -overwrite just read ... format is:
[B]8 bytes of graphics in the char ...What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …
... , say each node is 200 bytes long. I have 1000 names ... few quick instructions:
ld e,(hl)
inc hl ...
ld d,(hl)
and ... this:
32768:
ld hl,60000
BCALL print_string ...DK Tronics Compilation Tapes....MIA ??I have two tapes (no inlays) of compilaitons of DK Tronics games. One is from DK Tronics themselves, has a white label with black text, and contains…
... has block 6 with 93 bytes and block 7 with 39621 ... bytes.
Block 5 appears to ... : 2.028s
3- 164: Bytes : JUMBLY Length: 19 Normal Speed ... 39620 bytes of block 7 (16402):
[code]
16384 LD D ...Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
...
ld ix,16384
ld h,192
ld l,0 ... ld e,a
ld b,192+24 ; move 192 pixel bytes and ... 24 attribute bytes
ld c,32
loop:
ld a,( ...Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
...
org 32768
ld hl,(23670) ; randomize address: randomize ... ld e,a
ld b,192+24 ; move 192 pixel bytes ... and 24 attribute bytes
ld c,32
loop:
ld a, ...Need to scroll one column using m.c.I've used many of the available routines to scroll the entire screen in any direction, but I'm not being able to find one that would allow me to scro…
... fixed steps, so the bytes are not moved in ... br /> push hl
ld a,(bc) ;A =old ... ,NORESET
ld a,(23693) ;ATTR_P
ld (bc),a ... ;$58
ld b,a
ld c,l
...Open and read a file using +3DOS in MCForgive me if this has been asked and answered before, I've spent a fair few hours searching the forums and looking for books on the subject, all wit…
... will read the first 100 bytes from the disk file just ... /> [code]
ld bc,$0302
ld de,100
ld hl,32768 ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... line of the screen in bytes, using LDI, but at ... stack pointer as your offset: LD SP,-32 then just ADD ... copy a row starting 3 bytes into it, then before ... and copy the remaining 3 bytes.
Remember one ... /> And afterwards you can do LD SP,32 and ADD HL ...number padding functionI wrote a number padding function in BASIC a while ago, but when I came to want it again I couldn't find it, so I've done this enhanced [url=http://w…
... pop ix ;IX=(DEFADD)
ld a,"E"
call FINDA ... br /> pop hl
ld c,"."
call COPYDIG ;copy ...
dec b ;B =bytes (including minus)
ret
question re. STR$ bugCould someone point me to whereabouts in the ROM this goes wrong? [code]PRINT PAPER 5;1;STR$ 234[/code] (Only the "1" prints in cyan.) It's not the m…
This routine (48 bytes) provides a BASIC replacement for STR$ which fixes those two bugs; use "FN s$(numeric_expression)" instead of "STR$ numeric_expression". I copied the ROM's method used in CIRCLE & DRAW for checking -1z88dk vs. sdccI've just read this article (in Spanish) [url]http://www.cpcmania.com/index2.asp?urldest=Docs/Programming/SDCC_vs_z88dk_Comparando_tama%F1o_y_velocid…
... set
ld hl,ENOMEM
ld (_errno),hl
jp ... br />
stdio_error_zc:
ld hl,0
scf
[code]
ld hl,len ; gather param from ... the z88dk function saved 9 bytes and about 25 cycles.
Beginner questionThis might sound and be daft.... I've just been reading J Cauldwell's "how to write a Spectrum game" but was thinking of writing something in C as I…
... score;
#asm
ld hl,(_score)
inc hl ...
ld (_score),hl
#endasm
bytes at _spritedata to be individually ... is the location of two bytes where a memory address is ...FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…
... these changes will save 9 bytes, although I don't ... HL,BC=# of bytes to transfer
ld hl,(OldSP)
ld sp,hl ;Make HL bytes of room in ... stack (subtracting BC bytes from SP)
OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... and the last three bytes of the routine.[/QUOTE ... I posted is 58 bytes (assuming I calculated it ... NextChar: inc hl
ld a,(hl)
cp 0eh ... This should save another 4 bytes, thus reducing it to ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... INC HLs followed by a LD A, (HL); RET so that ... so there are now 7 bytes available to fix any new ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... possible to save another 3 bytes:
[CODE]
... ,BC=# of bytes to transfer
ld hl,(OldSP)
ld sp,hl ;Make HL bytes of room ... in stack (subtracting BC bytes from SP)
OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... , HL,BC=# of bytes to transfer
ld hl,(OldSP)
ld sp,hl ;Make HL bytes of room in ... stack (subtracting BC bytes from SP)
;add ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... , HL,BC=# of bytes to transfer
ld hl,0
ld sp,hl ;Make HL bytes of room in ... stack (subtracting BC bytes from SP)
push ...Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…
... 0001h to FFFFh
ld l, 81h ; Exponent
; At ... the mantissa highest byte
ld a, l ; exponent in A ... following scheme:
[code]
ld b, 4
LOOP:
bytes into HLDE, if I use ...OpenSE BASIC 3.1.1The eagle-eyed will have noticed that [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0027510"]SE BASIC[/url] got an update last week. As a te…
... this instruction
ld b,h
ld c,l ;DE= ... HL,BC=# of bytes to transfer
ld hl,0[/CODE ... FN parms, HL,BC=# of bytes to transfer
...Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…
... /> REPT 2 ;4 bytes
POP DE
LD (HL),E
REPT 3 ;6 bytes
POP DE
LD (HL),E
REPT 3 ;6 bytes
POP DE
LD (HL),E
DrawEnemy3_3
LD (HL),D ;3 bytes
INC H
