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Carrier Command bug? (dos)Any experts on Carrier command around? I've been playing a game at work since yesterday and have 20+ islands, and it's stopping building ACCBs so I …
... />
I've been playing a game at work since yesterday ... ).
Is this a known bug or copy protection?
A fast DRAW routineI was investigating how to speed up the line drawing for the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20225"]BASIC compiler[/URL]…
... z, __DRAW_SETUP1
ld a, 2Fh ; CPL
ld (__PLOTINVERSE), a
ld a, 0A6h ; and ... '
ld a, 8
add a, h
ld h, a
ld a, l
Times of Lore bugHi all, I'm trying to play Times of Lore but I seem to be doing something wrong. In the game you press space to access the icons and 0 to activate th…
... . I thought this may be a machine specific thing (I'm ... playing on a real +2A), so downloaded the ... it on Spin set to a bog standard 48k and the ... something I'm doing because a plotstopper bug like that would surely ...Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... the simple case of keeping a 'level defb' in memory and ... change was needed I would ld a,(level), cp 1, jp z ... . This worked fine(ish) for a 10 level game but is ... no good for a flip screen one.
AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... ;return on error
ld a,c ;A =operator offset in OPTIONS
defb "A","X","O","B","R","S"
R,a,b"
51 PRINT "SET ...probably a stupid question about RST16I'm using the 'hello world' code borrowed from [url=http://equant-retrochallenge.blogspot.com/2008/07/zx-spectrum-assembly-programming-under.html]her…
... intro screen of a game.
[code]
ld hl,line ... : ; Routine to print out a line
ld a,(hl) ; Get character to ... ; Spectrum: Print the character in 'A'
inc hl ; Move onto ...Amazonia (BUGFIX)This is a bugfix for game [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027280"]Amazonia[/URL], please add the following "known errors" des…
... ; clock address
9eca 3e3c ld a,3ch ; minutes overflow at 60 ... />
The time of day bug could be fixed just modifying ... ; clock address
9ec8 3e3b ld a,3bh ; minutes maximize at 59 ...A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... ][COLOR="Red"]Update[/COLOR][/B]: A new z88dk/sp1 installation can ... to worry about writing a sprite routine, a joystick handler and you ... (obviously), but I find that a good tradeoff.
... br /> // Means we can write a lot less code :)
#include ...+3e with DivIDE systemsIf we replace old R-GAL chip on original DivIDE with new XR-GAL (this is only firmware for GAL chip) then will possible DISABLE or ENABLE any DivIDE …
If we replace old R-GAL chip on original DivIDE ... /> LD A,192
OUT (227),A
XOR A
OUT (227),A
LD A,64
OUT (227),A
XOR A
OUT (227),A
R-GAL version used in original ...Zexall or Emulator bug?Hello! I was running ZexAll in Zero, Fuse, Spin, SpecEmu, Spud & Speculator and noted that all of the emulators occasionally froze on the "scroll ?"…
... affected...
I took a quick look and it appears ... stuck in a loop scanning the keyboard... (the ... emulator issue or is there a known bug in ZexAll? Or is ... on here before I took a proper look as I'm ...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…
... />
[CODE]
ld a,(xpos)
ld l,a
ld a,(ypos)
and ... )
loop1: ld a,d
ld l,a
ld a,e
and ...CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…
... a prime p of the form a*b^r + 1, carry c < a ... and a sequence of r ... x's < b such that t = a ... * x(n-r) + c(n-1), ... />
push hl
ld a,e ; i = ( i + 1 ) & ...Hep needed with a bit of code...I've written a bit of code to make a character move across the screen, but the counter stops at 29 when the 3 lines to delete the characters trail ar…
... /> ret
space: ld a, 2
call 5633 ... ld a,(63289)
ld (63298 ),a
call space
ret
rpg: ld a ... ,161
ld ... (63289),a
ret[/FONT ...PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…
... you fo about printing a numerical value using the print ...
For instance I have a value 0-255 and want ... of thing:
ld a,2
call 5366
ld de, (address of text to ... print)
ld bc, (length of text ...multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width isChronos (BUGFIX)Please add the following "known errors" entry to [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0000951"]Chronos[/URL]: [QUOTE]Bugfix provid…
... assembler bug".
This assembler bug introduced ... buffer
ld de, 3
ld b, 128 ; ...
Fixing this bug doesn't really make it ... order:
[CODE]56922: ld a, (59664) ; selected control
Full 16*16-digit BASIC multiplicationI liked Andre Adrian's 32-bit long multiplication routine so much that I decided to a decimal version. After all, 2^63 is only 9223372036854775808, a…
... DEF FN R(r$)=RR: DEF FN p(a)=PEEK a+256*PEEK (a+1 ... ):
DEF FN b$(r)="0000 ... />
810 REM initialise FN R(r$)
814 RESTORE 3: LET ... : REM EXX
1060 : REM LD A,B ; MPR IS B'C ...Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…
... /> ret nc
ld a,0x16
dec a
jr nz,$-1 ... /> ret z
ld a,0x7f
in a,(0xfe)
rra
ld a,c
cpl
ld c,a
and ...Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... up
FLIPH2 LD A,(HL) fliph2 LD A,(HL) ; grab byte
LD B,24 LD B,24
FLATTR LD A,(HL) flattr LD A,(HL ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... /> 7F = LD A,A
78 = LD A,B
79 = LD A,C
7A = LD A,D ...
7B = LD A,E ...
7C = LD A,H ...
7D = LD A,L ...A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
...
; page DOS
ld a,$07
call paginar ; page ... :
; read list
ld a,(iy+0)
bit 7 ... />
; page BASIC ROM
ld a,$10
call paginar
di
ld bc,32765
ld (BANKM),a ; BANKM is updated ...Does this addressing technique have a name?Hi All, Bit of a weird/unnecessary question, but can anyone help build on my knowledge of asm terminology by telling me what the *second* method of …
... All,
Bit of a weird/unnecessary question, but can ... />
LD A,21
LD (PlyrY), A
LD A,15
LD (PlyrX), A
LD HL, 3861
LD (PlyrY), HL
a programming term?They Stole a MillionI noticed that the tzx on the site is missing a Speedlock Block for Part 2. I don't own the original so cant make a perfect tzx, but I did recreate t…
... was interesting to learn how a simple Speedlock 2 block ... Speedlock is doing LD A,69 XOR (HL) ADD A,239 so I ... did SUB 239 LD B,A LD A,69 XOR B to ... block, anyway I put a second gap between them.
Maybe someone could make a perfect TZX but in the ...Problem Reading the KeyboardHi Folks, I'm working my way through Toni Baker's rather good book and thought I'd write some code to scan the keyboard and store the results so tha…
... below - any ideas on the bug would be much appreciated.
LD DE,_oldKeyStates ;Destination
LD HL,_currentKeyStates ;Source ... the keyboard segment number
LD A,(HL) ;Calculate the keyboard segment ...Help needed with a bit of code...My minds gone blank again I'm afraid, I'm having trouble with this routine that loads variables into memory then calls the corresponding routine. Th…
... ld hl, cor
ld de,adds
loop
ld a,(de)
ld ... (caller+1),a
inc de
ld a,(de)
ld ... (caller+2),a ...
;ld a,(hl) ;hl stores variables< ...Bug in the game "Bronx" which makes it resetI just found a nasty bug in this game from Animagic. If you hit the last enemy, from level 6, with the upper punch, the game starts getting a lot of …
I just found a nasty bug in this game from Animagic. ... punch, the game starts getting a lot of garbage pixels and ...ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…
... using Zero emulator to experiment a few routines in assembly, since ... it has a somewhat usable debugger.
However ... I believe I found a few bugs, some in "zero ...gobble a ghost bughttp://www.worldofspectrum.org/infoseekid.cgi?id=0002073 was just playing it for old times sakes.. as it was one of the first games I ever playe…
... games I ever played at a neighbours place.
typical ... home is. the left "L" . a ghost was over the last ...
