-
Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
... location and need to update attributes
RET NZ ;otherwise we ... don't draw attributes again
;paint attributes
XOR A ;reset ... type)
;hack it so attributes are also extracted
;in ... -
tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... screen character line complete with attributes.
...
call scrollattr ; first attributes
call scrollbmp ; then ...
; convert to attributes (thanks Alvin Albrecht):
or $07
xor $85
rrca
... -
Mode 2 Tile Editor SourceA Timex Mode 2 Tile Editor incorporating a byte mirror table. The compiled version is available in the CSSCGC 2008 collection from the WoS archive. …
... 46000
scr_to_bl1:
xor a ; copying to the screen ... tiles
scr_to_bl2:
xor a ; copying to the screen ... ; return
; ---------------
; ZOOM ATTRIBUTES
; ---------------
;
; perform a ... -
XOR - dodgy magazine referenceThe magazine reference section for Logotron's XOR has a link to a Spanish(?) magazine 'MicroHobby Especial'. All well and good, but the magazine arti…
The magazine reference section for Logotron's XOR has a link to a Spanish(?) magazine 'MicroHobby Especial'. All well and good, but the magazine article seems to about XORing bits, rather than moving chickens and fish around a maze. -
Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…
... .jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by ... = x ^ (x > 1)
xor e
ld e,a ... -
Manipulating attributes...Hi Folks, I have written a routine that allows a blue bar to be scrolled up and down a list to select an item. Each item in the list occupies two l…
... />
To allow the original attributes to be restored I take ... -
Storing and displaying attributes...Hi Folks, I have a requirement to store and then redisplay a line of attributes from the screen. For example: 100 DIM a$(1,32) 110 LET line=10 120…
... then redisplay a line of attributes from the screen. For example ... the ability to restore the attributes in some way - another USR ... -
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…
... ,b"
;# values: AND=A, XOR=X, OR=O, BIT=B ... ^n)
inc b
xor a
scf
SETBIT ... ,a,b"
37 PRINT "XOR ";a;TAB 9;b,"=";USR ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... terms of [I]arbitrary[/I] attributes, but then many games actually ... is spent loading the new attributes into registers before they are ... data. You'd change the attributes drawn to different areas of ... /> DEFW 0
DEMO1 XOR A
LD (STRTLN),A ... -
Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... easiest ways to check the attributes of tiles on the screen ... ATTR, allowing me to apply attributes to the screen?
Is ... -
Vertical XOR filler.. anyone?Hi, I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just tryin…
Hi,
I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just trying to find some references.. -
Brightness level of non-bright attributes on classic ZX 48Does anybody know what was a brightness level of non-bright attributes on classic ZX 48? Was it the same on 128, +2 and +3? I can see on wikipedia a…
... brightness level of non-bright attributes on classic ZX 48? Was ... -
Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …
...
ld hl,22528 ; attributes
ld de,49152 ; destination ... rlca
rlca
xor 130
ld h, ... br /> rlca ; 04ts
xor $82 ; 07ts
ld ... next attribute
xor a ; 04ts ; (timing)
xor a ; 04ts ; ... -
Mojon Twins MK2 and lighting effectsDoes anyone have any experience in getting the overlay.h working in the MK2 engine. There were several games written in the churro that used the ove…
... 24999 with 0 and the attributes would stop working. You would ... + ovl_y * 32 + ovl_x
xor a
; Start the ... -
XOR screenshotsXOR from 1987 is missing the loading screen and the in-game screen, Xor from 1990 has the in-game screen from another game.
XOR from 1987 is missing the loading screen and the in-game screen, Xor from 1990 has the in-game screen from another game. -
High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
...
NEW_4:
XOR A
CALL MOVE_4
attributes
PUSH DE ; store ... following row's coordinates and attributes
DJNZ LOOP_2
A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... (23693),a ;set ATTR_P
xor a ;BORDER = 0
call ... /> ld a,(23693) ;read current attributes
and 248 ;leave them ... ;load ATTR_T with the new attributes
call key_check ;decode ...Other than using attributes what other ways to detect collisions, when using char based movement?So I'm slowly working out the bits and pieces to write a game completely in assembly. I've been using attributes when writing in BASIC to detect whet…
... assembly. I've been using attributes when writing in BASIC to ...256 colour gamesFollowing on from the thread in the Emulator section... Will people who are working on converting games to 256 colour using Emuzwin please let me kn…
... fashion plus it uses the attributes to delete the sprites, so ... trails. I've tried XOR=1 and XOR=0. Can you suggest ...Can Anyone explain sprites in Jet Pac/Atic Atac etcJet Pac was 16k, and yet the sprites were impressively fast. I notice they had a slight flicker at times, but were notmally pretty flicker free. W…
...
; ---- Set the attributes (rough experimental version) ----
... /> ld de,(_Sprite_ScreenAddr)
xor a
ret
xor a
ret
xor (hl)
ld (hl ...128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... />
; Set Attributes
ld hl,49152 ... a
xor a
call PageRam ... ld a,(renderpage)
xor 2
ld ( ...tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... bits are already set
xor $85
rrca
rrca ... /> ld e,l ; now shift attributes
ld d,h
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... player colour
// bit 6 = xor plot flash
// bit 7 ... br /> }
// bit 6 = xor flash in plot
// bit 6 = xor plot flash
// bit 7 ... we must remember to store attributes in the 9 byte buffers ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... the FLASH bit of all attributes in the plot square (the ... />
[code]
// bit 6 = xor flash in plot
attributes directly. Again, "sp1_IterateUpdateRect()" is used ...Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... LD (23695),A ; temp. Attributes
RST #20 ; ... AND 3
XOR 88
LD ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... SaveRamtopValue
Detected_48K
XOR A ; Set 48K RAMTOP value ...
LD A,B
XOR C
LD (FailedBits),A ... now contains correct offset into attributes file
LD HL ...Fastest way to clear a screen.We haven't had an optimizing fun for some time, so let's have some: What's the fastest way to clear a screen (i.e., filling the 6912 bytes at 16384 w…
... fill whole screen area, including attributes, with zeroes, there is short ... ? I think you need additional XOR A.
POST EDIT ...Getting started with asm Speccy codingSomeone on another forum I read has asked for good Speccy coding resources. I thought it would be great to link him to a simple tutorial about how to…
... .
Otherwise:
XOR A
CALL #1601 = lower ... display and
; sets the attributes to the permanent ones
; the attributes for the lower lines are ...Has any programmers recently pushed the spectrum to the limits?Hi there. Ive just discovered this great forum and I was brought up with the speccy 16,48 and then 128k. Im just wanting to know if there are any re…
... because the instructions holding the attributes aren't next to each ... DEFW 0
DEMO1 XOR A
LD (STRTLN),A ... - the instruction data encodes the attributes, modify it to change what ... ; Mop up another couple of attributes
LD HL, 1008H ; ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... out, since you have 32 attributes per line you only need ... low I/O byte
xor a ; first register
