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Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
... ="AndyC;973416"]Use a 256 byte, page aligned table that contains the mirror ... image of the relevant byte.[/ ... build the table.
To get the mirrored byte in ... 'inc h' to my table. Or something like that.
Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
The table should have the flipped byte at the appropriate index, i. ... you can directly look up the flipped version of the byte. It's ... , by just using a different table)Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... more.
Next up I want to split the ... input buffer up into tokens and print ... /> ELSE
FONTBASE EQU nice_font - 256
ENDIF
DBG_REST_OF_IBUFF ... /> ld h, (hl) ; second byte of table
add d ; add on ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ELSE
FONTBASE EQU nice_font - 256
ENDIF
DBG_REST_OF_IBUFF ... h, tbl_rows/256 ; address of the screen rows table page
; add ... /> ld h, (hl) ; second byte of table
add d ; add on ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ELSE
FONTBASE EQU nice_font - 256
ENDIF
DBG_REST_OF_IBUFF ... h, tbl_rows/256 ; address of the screen rows table page
; add ... /> ld h, (hl) ; second byte of table
add d ; add on ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... (hl) ; first byte of value in table
inc l
byte of table
add d ; add on ... ld h, (hl) ; second byte of table
add d ; add on ...
; aligned data first
ALIGN 256
alignedsectionstart:
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ELSE
FONTBASE EQU nice_font - 256
ENDIF
DBG_REST_OF_IBUFF ... h, tbl_rows/256 ; address of the screen rows table page
; add ... /> ld h, (hl) ; second byte of table
add d ; add on ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ELSE
FONTBASE EQU nice_font - 256
ENDIF
DBG_REST_OF_IBUFF ... h, tbl_rows/256 ; address of the screen rows table page
; add ... /> ld h, (hl) ; second byte of table
add d ; add on ...ANNOUNCE: Jet Set Willy Construction Kit (JSW CK 1.0)Today I release Version 1.0 of my Jet Set Willy Construction Kit (JSW CK): the program I used to write We Pretty, Jet Set Willy: The Lord Of The Ring…
... either access the guardian-class table via the guardian-instances in ... browse the guardian-class table and look up all instances of a guardian ...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. …
... 2 Tile Editor incorporating a byte mirror table. The compiled version is ... /> ; ------------
; MIRROR TABLE
; ------------
;
; A 256 byte lookup table to mirror the ... bitmap contained in a single byte< ...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…
... which can contain one of 256 character codes as background. ... cannot be generated in just 256 UDGs. Instead plot graphics ... This is called bottom up development where we identify and ... strtok() works, look it up under the strings library. Also look up the new ...Tile Map HelpI've got a 256x256 map. This is split into 64 chunks of 32x32. Each cell takes up one byte so only four chunks are held in memory at any given time. …
... 32x32. Each cell takes up one byte so only four chunks are ... . It means I have to look up each cell individually, but it ...So what about ethernet and ZX BASIC?Well, as of about 5 minutes ago, ZX BASIC for the first time properly wrote some packets to the network! OK, so it isn't perhaps 100% what Andrew Ow…
... />
Spectrum streams work a byte at a time, which would ... whole packet just for each byte!) and very slow, so under ... on - each stream has a 256 byte buffer in a page of ... character, or the buffer filling up. (Once I've got input ...Covering your hardware...Hey, you WoSsers remember "back in the day" people would have special covers for their printers(typewriters) or even computers? I remember these din…
... /> EDIT: Sidenote, I tried to look up special slip-covers for computers ... and had to come up with this search-string to ... -sofa -cd -couch -map -seater -table -casual -suede -"sure fit" -loveseat ...Rendering clipped glyphSometimes you need to render a glyph of arbitrary size to the screen. And clip it. For example: drawing a mouse cursor means combining drawing of a…
... glyph_t *glyph,
byte x,
byte y,
rectangle_t *clip_rect ... address table (using standard trick with two tables on 256 byte boundary ... point 12 then first byte mask will be 11111110 ... and end byte mask will be 00000111. ...What's the deal with hash tables, anyway?As there's nothing in the [url=http://www.users.globalnet.co.uk/~jg27paw4/pourri/0-surc-contents.htm]Compendium[/url] about hash tables, and as I've …
... welcome.
A hash table is the means of implementing ... ; yak. If I want to look up information about my cows, how ... hash keys:
[*]a hash table, associating hash keys with data ... to the limiting of hash table sizes to prime numbers.) Remember ...Need the title of the Sinclair Basic manual to look for itI had a copy but I've lost the USB chip it was on! I need it to look up commands because some Basic programs I looked at all used the command MOD and…
... on! I need it to look up commands because some Basic programs ...AticAtac DisassemblyHi Guys, I've been spending quite a bit of time the last 2-3 weeks working on the AticAtac disassembly, evolving it into a much more documented as…
... and commented and sprites and look up tables labelled and commented.
byte-for-byte match to a reference ...Huffman questionI'm pretty sure that the answer to my question is "no", but I just want a second opinion: Is it possible to somehow cram a Huffman decompressor + de…
... you used one byte per symbol in a table to record frequency ... , you would have enough information in 256 ... can tolerate more error the 256 byte table can be shrunk. When you ... as the decoder's frequency table.
The actual ...help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
... same method as Cyborg's table look-up except I got paid for ...i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
Sound DreamJust daydreaming, don't beat me for this, if any of you assembler guru's (especially emulator developers) ever are in need of new ideas, it would be…
... remakes - they're in 256 colours and look gorgeous.
[/quote]< ... that applies to the current 256 colour scene. All projects ...
I think the term "256 colour project" leads people to ... their dogged best to come up with something fairly decent ...Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... br /> LD H,LINEPTRS/256
ADD A,(HL ... assumes the pixel table doesn't cross a 256 byte boundary.
If you place the pixel table ... right at the beginning of a 256 byte page, ...
LD D,PIXELTAB/256
LD E,A
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... ;placing table at the beginning of
;a 256 byte page ... br /> LD H,C0H ;table with preshifted mask bytes for ... B0H ;there is a table with all bytes preshifted ... form:
;mask byte, sprite byte, mask byte, sprite byte... and so on.) ...need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... ADD A,BYTETAB/256 ; there is a table with all bytes preshifted ... address table
* SCRTAB must be at the start of a 256 byte ... start of the next
* 256 byte page.
SCRTAB ... shifted each byte takes two bytes
* The table is divided ...I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... understand that I read each byte from a virtual memory array ... the numbers stored in each byte. Thus, I don't ... is, you need to go look up programming for a PC (or ... Memory: Array[0..65535] of Byte;
Registers: TZ80Registers;
...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... />
Just had a quick look at your routine. Nice work ... , only when your crossing a 256 byte boundary: INC L is sufficent ...Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…
... and know exactly where the 256-byte boundaries are within each block ... per byte. If memory serves, in MTV the dummy screen was aligned ... exactly on a 256-byte boundary, so the ...Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
... data is inside a 256 byte boundary. I now ... has been sped up but I think ... ORG 51200 ; MUST BE 256 BOUNDRY
MAPLOOKUP DEFW TILEIMAGE0 ... Default
DEFW TILEIMAGE2 ; Up
DEFW TILEIMAGE3 ; Down ...
