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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…
... additional hardware, but these Soundtrap/256 colour games can't, even ... that people should stop making 256 colour games just because it ... , you can expand games to 256 colours. Look, for the Multitech graphic ... or MP3 to AY Frequency table converter. As long as the ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... the volume - it eats up 4K for a full 64 ... hl,bc ; carry to high byte if necessary
ld ... ld a,(hl) ; fetch sample byte
volume_lookup_low: or 0xc0 ; ... h,0x83 ; high byte of lookup table
ld a,(hl ... four in the lookup table will save some time< ...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 ...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 ...Map to screen address problemCan anyone help me out with what I guess is a screen address calculation problem. I need to calculate the screen address of a tile based on a number…
... 'd definitely use a lookup table for speed instead of the ... at the start of the table (with interrupts disabled of course ... SP here, and if your table contains 256 entries or less (this ... ), it's worth using separate 256-byte blocks for all the entries ...DocumentationI'm sure someone has already answered this, but I'm new to these forums. Could someone provide me with documentation about how data is stored in ZX …
... :
* A flag byte: 0x00 for header blocks, 0xff ... the block (including the flag byte) produces 0x00.
... can't be bothered to look up at the moment).
* ... of block.
* Checkbittoggle (1 byte).
[ This Message ...sprite making in +3 BASIC?Any sprite tutorial I come across is far too complicated! Can someone help me? For instance, how do you create a person-shaped animated sprite which …
... not practical with a dial-up modem connection (I tried it ... one page, so I gave up - although, as I have all ... , here's the pages to look up:
SU#76 (Jul ... at the bottom, although the "Table 1" assembler listing referred to ...Convert x,y to Attribute Address in AssemblyWhat is the fastest way, given x,y (in hl) to return the attribute address?
... the expense of a 512 byte lookup table, you might want to ... has to be on a 256-byte boundary, of course.
Assistance with IM2 routineI subsequently got a working IM2 routine.
Set I to $fd; the table at $fd00 should be filled with $fe bytes (257 of them) so it will look up an address anywhere in that table and jump to $fefe.TZX specs v1.20 RC1Hello folks, after months of waiting finally you have the latest update proposal (RC1) for the TZX format! This update includes revisions to the 0x…
... we can have up to 256 symbols in the table. I hope I ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... might be able to speed up the 6502 version using self ... sorted lie in the same 256-byte page. Are you not? (Better ...The 150 pound home computerWe missing out on this still ... I think. I know the PC market has wrecked all chance for any alternatives to ever have a hope but ... what if. :lol:…
... ]
Another thing to look up, great
[QUOTE]
256 color "hires" mode ( 512x192 ). But ...Database + web programming queryI was thinking of the best way to implement the a book type-ins database thingy, and I thought something along these lines would be nice and simple: …
... programs column and add another table that associates programs and books ... /> 2. book_id (corresponds to book table's unique id)
3 ... book you look up all matches to book_id in the programs table.
Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... the low byte holding the fractional part. Trig used look-up tables with ... 8 data and 1 attr byte for each used block. Room ... the gameplay more than makes up for it ;-)
There ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... the low byte holding the fractional part. Trig used look-up tables with ... 8 data and 1 attr byte for each used block. Room ... the gameplay more than makes up for it ;-)
There ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... the low byte holding the fractional part. Trig used look-up tables with ... 8 data and 1 attr byte for each used block. Room ... the gameplay more than makes up for it ;-)
There ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... the low byte holding the fractional part. Trig used look-up tables with ... 8 data and 1 attr byte for each used block. Room ... the gameplay more than makes up for it ;-)
There ...Question about digitized sound and videoI searched the forums and couldn't find the answer, so here it goes. Regarding digitized sound: I remember reading an article long ago about a vid…
... to the screen or a 256-byte sound buffer, and stopping periodically ... . Similarly, you can make translation table from 8-bit to 4 ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
Anyone care to write a version that doesn't require a table aligned to 256 byte boundaries (and has the table directly following the code)? Thought I'd ask in case someone does so that I can avoid a little work :-)Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... require a table aligned to 256 byte boundaries (and has the table directly ... [CODE]overhead2 EQU 21 + (LOW table)[/CODE]
The 16 is ... that as long as the table and the "remainder" routines ... ] ASSERT (HIGH t_ret = HIGH table)[/CODE], which will fail if ...Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... the low byte holding the fractional part. Trig used look-up tables with ... 8 data and 1 attr byte for each used block. Room ... the gameplay more than makes up for it ;-)
There ...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…
... int_seed" is the two-byte integer stored at address ... file stores pixels one byte after the other horizontally ... characters terminated by a zero byte). [I]s[/I] ... it may be time to look up a C tutorial on ... right halves of each fatted up UDG byte.
...Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... HL
FAST: LD H,TABLE/256 ; 2 / 7
ADD A ... to a 192 bytes table, aligned to a 256 byte boundary, and followed ... by another 192 bytes table 64 ...Starting on machine code - BASIC first?Howdy. If I wanted to start learning machine code for the speccy, from scratch, would you recommend I learn BASIC first or is it entirely possible to…
... bit pattern or type it up correctly if it's in ... bit pattern. "and 248" comes up in spectrum display code and ... as to 248 was come up with but if he sees ... address is aligned on a 256 byte boundary). Spectrum display file addresses ...
