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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…
... zx_cyxsaddr_callee + ASMDISP_ZX_CYX2SADDR_CALLEE
;; hl = screen address
[/code]
but ... the djnz once for each pixel row, I think you need ... be loaded with 9 to get it right.
... halt statement and how to get this running in the ... -
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…
... the 8 byte aligned scrn address
pop af
sla ... h ;increment h to pixel line aligned address
dec a
add a, c ;get x offset from c
address table with each address representing a 8 ... -
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…
... then 224 cycles for each pixel row. This means, ... .map file gives the address of all the labels ... a subroutine takes with this address info and a debugger. ... window. Subtract and you get the length of time ... calculations. For do_scroll() I get about (21*32 + 45 ... -
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…
... integers will result in the address of the amp1 array. ... may not be what we get! We can tolerate a ... floating point divide from the get-go.
We ... 1)
{
clg(); // clear pixel portion of screen
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…
... b]d_PrintDoubleW()[/b]. The pixel scroll routine requirement has ... which are not. To get the graphical appearance correct ... 1] & 0x38; // get player colour in paper
address in display file where this ...Port Chuzzle Deluxe for Windows to the ZX Spectrum?Hi all, I've been looking around for a Commodore 64 or ZX Spectrum game that's very similar to a Windows game called "Chuzzle Deluxe", but haven't b…
... positioning e.g. a blue pixel in just the right spot ... with e.g. a yellow pixel right next to it. But ... each colour.
To get started, I can maybe put ... have your direct e-mail address, please, so that we don ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... address for pixel row copy
ld h,d ; now need to get ... de ; address of pixel row above becomes the destination address for next pixel row ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... raw pixel data 2 bytes at a time, not the screen address ... (sp), hl'-type instructions to get the saved bytes back in ... on the screen starting one pixel line higher? Anyone know how ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... (sp), hl'-type instructions to get the saved bytes back in ... hl,$56e0+16 ; source address in second last pixel row
ld ... hl,$57e0+32 ; destination address in last pixel row
ld (destination ... to subtract 32 bytes to get at the first 16 bytes ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... point at the first address you want to read ... previous pixel row, do its last half, etc. The sp address ... point at the first address you want to read from ... and the sp address for pushing (writing bytes) ... next step will be to get rid of the tear ...ANNOUNCE: BASin r14 is up. New SCREEN$ paintbox included.Hi all, Well, I can't sit on this any longer - so I've released it. Let's all get a good testing session going, eh? You can get the new BASin [url=…
... one from Art Studio. Pixel by pixel with the standard mouse ... as a symbol-shift would get in the way. Lemme ... font stored on a certain address. There are a lot of ... I need to add a "pixel-ise" option to the ... which, combined with a 4x4 pixel-ise would create a set ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... top line down by 1 pixel, and have immediately hit a ... the sequence! However, I also get a nonsense in basic error ...
dontmove
inc h ;get posn from line 2
address
;start popping
ld ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
Announce: BASin r14b availableHere's the fix mentioned earlier for those of you that either are too lazy to update your OS (XP SP2 has been out aaaaages, Arjun!) or even junk that…
Right! Let's get all these in. ... I'll decide which) will get the maximise option.
... paints a pixel, clicking again deletes that pixel. This makes ... -button to delete the pixel.
-Add shortcut ... empty one), BASin throws an "Address violation" error.
...Russian Translations...As i have once again been reminded (by the "Homebrew games" thread), there are some funky looking Russian games that I can't play due to not understa…
...
Does the 6-pixel font look familiar? I ripped ... ;Input paramters, DE=destination address on screen of first (top ... />
print_6x6_inner
; Get byte of data
LD ... />
; Restore destination address
POP DE
;Next ...I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…
... block in the ST's address space. You can then hide ... a 16 pixel horizontal scroll.
To get the horizontal ... 4, so you get horizontal movements in 4 pixel increments. There are ... demos which use 16 to get single pixel horizontal scrolling but that ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... peripherals??? In which case, the address decoding can be much much ... the palette registers during a pixel update will contend until the ... For every attribute byte loaded, get the palette entry for ink ... border colour is changed, get the palette entry and store ...POKING graphicsI remember using binary code (in BASIC) to POKE graphics (thanks Input magazine!) Using a FOR..NEXT loop you would POKE each square in the 8X8 charac…
... effect on any other pixel. Once something has appeared ... change them, but the address in ROM where they ... screen at the correct address. It appears to be ... but you won't get the speed and smoothness ... on the screen with single pixel rather than "character" ...What Z80 development tools do you use? What books?Hi. I've been meaning to do it for over 25 years, but.. better late than never :) I'm starting to learn machine code and am trying to get a developme…
... /> ; Enter with HL as the address of the string
ld ... /> ; Enter with HL as the address of the string
ld ... Spin there's one white pixel in the top right-hand ... bit.. anyone know who to get rid of that?
Character scrollingOk, first I'd like to say that I'm not looking for a complete routine (but that might help) because I am hoping to write it myself and learn a bit mo…
If you are doing pixel scrolling, you might find this ... label tbl_roll).
To get a value shifted right x ... hl ; point to next data address
pop bc ; restore count ...Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …
... can run it until we get X bytes (or just over ... ', e.g. '32' for 16x16 pixel-only sprites. The compressor will ... can then be given the address of the decoding tree/dictionary ... and the address of a compressed chunk, and ...My first platformerHi all! How do you do? Been lurking here for a while, but never had the courage to join the forum. :) The Speccy was my first computer, so I've alw…
... would normally indicate a graphic address for the column.
... and sp1_AddColSpr calls graphic address parameter. Then in the ... by sp1_MoveSpr* plus the address specified in the sp1_CreateSpr / ... same char down one pixel, you get the diagram on the ...My first platformerHi all! How do you do? Been lurking here for a while, but never had the courage to join the forum. :) The Speccy was my first computer, so I've alw…
... update rates. Perhaps 1/3 get changed in each update loop ... is till moving them in pixel increments but the NR functions ... or not.
srcframe = address of the unshifted sprite graphic ... use and add that absolute address to the struct_sp1_ss.e_offset ...Hi Res Print Routine neededHas anyone seen code for a print routine with pixel accuracy? That is print(y,x,CHAR) that allows 0 < y < 192 and 0 < x < 255 - that takes a charact…
... ) the corresponding struct_sp1_updates affected get added to a linked list ... that is done, the pixel buffer is copied to screen ... character into the pixel buffer at address SP1V_PIXELBUFFER and all ... br />
The screen address where each character square is ...A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…
... -contended memory, somewhere in the address space 0x8000-0xBFFF.
pixel scrolling with [b]rl (hl ... 7 screen in bank 2 (address 0x8000).
[QUOTE= ... after EI the isr could get called again and again and ...Platform Game Designer 2Right, with Telly Heroes out of the way, I've decided to have a second attempt at this. I've ditched the old PGD2 source, and started again with the…
... of the pointers and just address the data directly.
pixel below where it should be and you get stuck ...Mr Do! ?Not exactly a new idea (at least twenty-seven years old now :-o), but how about a port of Mr Do! to the Spectrum? There was never an official one, ev…
... Do! used 12x12 pixel characters within a 16x16 pixel game grid.
I believe I can even get the two-channel arcade music ... never normally placed below below address 32768, because the RAM contention ... notes. This way, whenever I get stuck on one program, I ...Mr Do! ?Not exactly a new idea (at least twenty-seven years old now :-o), but how about a port of Mr Do! to the Spectrum? There was never an official one, ev…
... Do! used 12x12 pixel characters within a 16x16 pixel game grid.
I believe I can even get the two-channel arcade music ... never normally placed below below address 32768, because the RAM contention ... notes. This way, whenever I get stuck on one program, I ...ccompletly baffeled machine codeHi everyone, BEFORE you ask i have not asked help for loads of problems i have recently now encountered and i figured the problems out myself, hones…
... on any other pixel. Once something has ... CODE] ld hl,16384 ;screen address - 1st byte of "character ... loop1 ld a,(de) ;get byte from ROM
inc de ;get next byte of Character ...
