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IF1Bis problems. The Edge of the Spectrum...Advice is sought from the learned on WoS. I just bought an Interface 1Bis from sunny South Africa. It arrived fast, but unfortunately doesn't work.…
...
0100 = PAG_SZ EQU 256
0200 = SEC_SZ EQU ...
0098 : 2b323536 DEFM "+256"
009c : 0e DEFB # ... $00b0.
Total size 177 bytes.
[/CODE]
... -
OPUS Discocery DriveHi, since I am new here pls. excuse my bad English. I have a problem with 2 OPUS DISK Drive. One of them is working fine the other not. So I decided…
... two bytes, and retrieved like this:
PRINT PEEK 30000+ 256* PEEK ...
Your number is 9+ (256*32) = 8201 which indicates that ... -
NOW look at what SpecBAS can do![img]https://sites.google.com/site/pauldunn/specbas_32.png[/img] Here's the code: [code] 10 WINDOW NEW w,0,0,SCRw,SCRh BPP 32 20 FOR f=1 TO 512 30 …
... WINDOW NEW mywin,10,10,256,256 TRANSPARENT 128 BPP 32 ALPHA ... will need to have four bytes following them rather than just ... -
dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…
... do that, with the 5 bytes named a,e,d,c ... a THEN
LET number=256*c+d-(65536 AND e ... -
dumping protected BASIC loadersI wrote this a few weeks ago but forgot to post it. It will load & list from tape/TAP/TZX any BASIC program which has been saved with SAVE, including…
... ]
...
10 LET a=bytes: LET iv=0: LET bt ... /> FOR d=a-1 TO bytes STEP -1:
LET c ... -
Routine for handling large scores?[FONT=Calibri][SIZE=3]I want to store various numbers for scores and levels etc. Some of these can be very large so will need to be held in multiple …
... to a series of bytes (from 2 to 256) representing the individual ... /> i.e.
score bytes 00 00 02 01 00 ... -
Multiply by 48Is there a 'cheat' to multiply by 48 in Z80? I have a table of sprites 48 bytes each entry, and I want to be able to offset my pointer with a simpl…
... to sprite
17 bytes[/CODE]
EDIT: You ... in DE is at a 256 byte boundary (i.e. E ... -
Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... sample
ld h,table/256
ld c,254
bytes are replayed from the table ... for the next 8 PDM bytes. there's also a ... boundary and consist of 64 bytes in sets of 8. ... should eat through around 7000 bytes per second, with two samples ... -
Multiply by 48Is there a 'cheat' to multiply by 48 in Z80? I have a table of sprites 48 bytes each entry, and I want to be able to offset my pointer with a simpl…
... memory, put the sprites at 256 byte boundaries and just add ... it as the offset in bytes therefore you never have to ... each entry is only 2 bytes long. Gives you the advantage ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... .
jumptable ; aligned to a 256 boundery
DEFW donothing ; 0 ... and get it to 4 bytes.... -
Latin-1 font for FZXI'm currently creating some [URL="http://en.wikipedia.org/wiki/Latin-1"]Latin-1[/URL] (ISO 8859-1) characters to be added into [URL="http://www.world…
... font, this would take 5216 bytes plus overhead. With compression and ... or two extra tables of 256 characters would do the trick ... -
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... at 32768
; add 6912 bytes to get to transfer_back_to_front routine ... br /> add a, 64 ; 64*256 = 16384 = start of screen display ... br /> ld d, a ; line * 256
; find which third of ... called !!!
; although 384 bytes is a handy chunk for ... -
UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... have to make it 768 bytes (or 256?) smaller than the actual ... -
So shooting 360 degrees?...[I]How do I go about having - for example - a cannon in the middle of the screen, that can shoot in any direction towards the player?[/I] Well, I do…
... pixel, you use the upper bytes for screen co-ordinates (and ... like 128 angles (thus a 256 byte table).
So ... -
Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…
... for the map, 36 bytes per tile (4608 bytes), without any compression ... . I'd keep a separate 256 byte table that holds properties ... -
Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…
... tiles allowed per level = 3072 bytes (3K)
Level ... .. Each level (map/tiles) = 19456 bytes (19K)
[/CODE ... br />
32 bytes - bitmap
4 bytes - colorize
its ... next
you can use 256 byte table for tile description ... -
Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…
... br />
32 bytes - bitmap
4 bytes - colorize
its ... next
you can use 256 byte table for tile description ...
[QUOTE]32 bytes - bitmap[/QUOTE]
[00..31 ...
[QUOTE]you can use 256 byte table for tile description ... -
UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... :
[CODE]PRINT PEEK 23606 + 256 * PEEK 23607[/CODE]
You ... the character set is stored 256 higher at 15616. Character codes ... to copy at 8 bytes each, or 896 bytes. To make room ... -
UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... banks start at multiples of 256 so only the hi-byte ... -
Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…
... attributes (the attribute bytes complement the screen pixel bytes but sit 8K ... " specification allows for up to 256 colours to be defined with ... -
Plane confusing...Nowhere near as exciting or complicated as one of Morkin's quizzes, but... Can you work out which game's loading screen was loading into which of ZX …
256 colour mode's working :)
[ ... mode that uses 2 attribute bytes, one for ink and one ... -
analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... . It's only using two bytes for each counter, so it ... b$=STR$ (PEEK (a+1)+256*PEEK (a+2)):
PRINT ... -
48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
... ]PRINT PEEK 23732+PEEK 23733*256[/QUOTE]gives you the last ... address is 16 bits, two bytes need to be read.
Command and Conquer type game?Hey all One of my all time favourite games although not spectrum based, is the Command and Conquer series. I'm sure many of you are famailiar with…
... less than 100 bytes of code, plus 512 bytes of buffer area ... to store up to 256 "open ...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]…
... to initialize the table with bytes that satisfy this recurrence relation ... by definition (0..255 < 256), and that the carry c ... output bitstream is treated as bytes or 32bit numbers or anything ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... moment five bytes in size. The buffer fits in a 256 memory ...Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…
... FN p(a)=PEEK a+256*PEEK (a+1): CLEAR 32767 ... : defm "FOUR" ;must be 4 bytes
RND: LD HL ...Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…
... FN p(a)=PEEK a+256*PEEK (a+1): CLEAR 32767 ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... is a divisor of 256 (for instance 4 bytes per tile) and ... , 4 ; copy sprite data (4 bytes) to end of queue
[CODE] ld h, BUFFER/256
ld a, (head_1+1 ... is not a divisor of 256. I will leave that case ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... code blocks are 5 bytes wide and not four ... blocks of 6 bytes, considering that 256 mod 6 = 4 ... copy sprite data (6 bytes) to end of queue
256, restart at position 4 ... bytes it's exactly the same, but considering that 256 ...
