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draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…
... in the border. I can get it to draw a line ... line and not a single pixel.
rept 3580 ... corner. Is it possible to get a multicolored block using the ... -
Anyone have a PO BOX address?No, I don't want to nick yours, am just seeing if it's worth having. Looks as though Royal Mail charge about £250.00 a year for one? Sounds VERY ex…
... ... I no longer have an address that can be delivered to ... 's the only way to get stuff posted. But I still ... -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... and copying it to the pixel line above. This continues for ... to subtract 4 from the address to move to the line ... moment i have the copy address in HL and the paste ... address in DE, and I'm ... -
A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... or current screen/sprite data address. Instead, it uses prime ... holding the screen address and A holding the pixel position (the usual ... /> ex de,hl ;save screen address in DE
... with high byte of screen address
sub 8 ;subtract ... -
Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... , so I thought I'd get out the unit and see ... I'll see some one-pixel-thick black stripes flicker across ... chips with sockets until I get something other than this pattern ... 've tested continuity across the address pins, so I don't ... -
Tutorial: Using UDGs in SpecBASSpecBAS is capable of using graphics mode, in a similar manner to the original Spectrum. Like most things though, the extended nature of SPecBAS's ab…
... br /> On the Speccy, you get to graphics mode with Shift ... redefined - we'll get to that in a ... That is the address of the first pixel in the UDG ... quit and restart SpecBAS to get them back, unfortunately.
get interesting. Let's say ... -
Out Of Compo - an erotic pixel compo this November!Hello, guys! I'd like to welcome you to participate in our graphics compo. [url="http://ooc.retroscene.org/en"]Out Of Compo[/url] is a virtual con…
... to graphics entries that usually get rejected at demo parties and ... a few more categories - oldschool pixel art for a number of ... platforms, including Commodore 64, modern pixel art, digital painting and 3D ... too. Win a compo, and get an extra challenge of getting ... -
Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…
... logic, and I seem to get activity on A15 with my ... a multimeter. By contrast, I get .6 volts on my Spectrum ... , 170, and 0 to that address, but PRINT PEEK returned 85 ... -
Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …
... the high byte of address, points to an address in the slow ... row address (bits 13-7) which can point to a pixel byte ... first pixel/attribute burst, the CAS asserted the refresh address, so you get ... snow.
— If it happens on this 5th pixel ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... when deciding where the next pixel needs to go there is ... increment L if the last pixel was drawn in the 0 ... rather than explicity recalcuating the address each time.
You can ... range but frankly I would get rid of anything that does ... -
ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... some info on where to get the TASM assembler
; ... to use it and get the contents into an ... ld hl,04100h ; second pixel line address in hex
ld de ... times from 8 then we get 128 (8x2x2x2x2)
; jr ... ; you'd then need to get the new colours for the ... -
Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…
... and tried to duplicate ( 2x1 pixel, one color each with attr ... and paste them in the address bar of your browser, just ... 't, BUT what he did get was 8x1 instead, like Multitech ... -
Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... whole lot to know to get started programming the Spectrum. Most ... x,y coordinates to screen address and pixel mask. Most of the ... holds your screen address and B holds the pixel mask for that ... SSS=0 through 7 to get the 8 udg bytes on ... -
Ported whole casettes of backuped utiltilitiesHi! A friend of mine gave me a few casettes he found in the attic - he used these to backup ORIGINAL casettes he had back in the spectrum games. The…
... like "twat", "troll", "git", "Get the Fuck Out!", and using ... [B]DEFINITELY[/B]. Things can get to you. And they build ... /> Though if you address me, you should address anyone else!
< ... />
_________________
[B]Pixel Me Do?[/B]
[url ... -
New project for 256 colours Games emulator!O.K. , I suggested Jonathan Needle ( Creator of the excellent Spectaculator at [url="http://www.Spectaculator.com"]www.Spectaculator.com[/url] ) to c…
... code from the same address (in their own memory ... load data from the same address (in their own memory ... identical. To draw each pixel of the display file, ... 256-entry pallette to get a 24-bit RGB ... to be displayed simultaneously at pixel resolution.
... -
C64 & Spectrum loadingscreens!I was bored today, so I decided to compare some stuff. :) [url="http://www.lemon64.com/loadingscreens/"]http://www.lemon64.com/loadingscreens/[/ur…
... z80 is, you won't get anything more than 2 colours ... . Ie, with DRAMs the memory address is split in half, with ... , quickly reading a full 32 pixel bytes and a full 32 ... , then it must read every pixel/attr pair the slow way ... -
42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…
... binary via an emulator at address 64789. Spectaculator, eg, can do ... - it writes a print subroutine address into the CHANS area, but ... first and last pixel columns removed (ie 6-pixel wide chars). I ... your own character set to get better looking 42 column text ... -
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 …
... ; A returns pixel point
EX DE,HL ; save address
LD ... HL,TAB ; table for pixel
... EX DE,HL ; get address
XOR (HL) ; reset pixel
LD (HL ... -
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 …
... pixel position and multiply by 96. Then add on the start address ... all these calculations, including screen address at a non-speed-critical ... do seven lines - adjust screen address - then one more line then ... /> Let us know how you get on
Derek -
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 …
... />
LD A,C ;taking pixel position
ADD A,A ... DE,(SPRADR) ;taking precalculated screen address where to draw sprite
LD A,(SPRXLEN) ;get width of sprite
DEC ...
LD A,(DE) ;Get the screen contents
AND ... -
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
...
; based as opposed to pixel based system
... /> PrintSprite:
; Get beginning of graphics for sprite ... ; HL Contains Screen Address
; DE Contains Char Address
; On ... -
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
...
; based as opposed to pixel based system
; ********************************************
; First, calculate the graphics address
; Get beginning of graphics for ... -
An emulator(another on of my projects) Does anyone know how to write an emulator? The emulated computer is very simple (a MK14, infact -also by Sir Clive) and a…
... things like having a 30 pixel high scroller bobbing across the ... like working out screen address for a pixel and setting it in ... join the club, do I get newsletter? -
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 …
... /> ; Get GFX for char and add offset based on pixel position ... HL CONTAINS SCREEN ADDRESS
; DE CONTAINS CHAR ADDRESS
; ON ... /> ; DE CONTAINS NEXT PHYSICAL CHAR ADDRESS
PCHAR:
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 …
... /> ; Get GFX for char and add offset based on pixel position ... HL CONTAINS SCREEN ADDRESS
; DE CONTAINS CHAR ADDRESS
; ON ... /> ; DE CONTAINS NEXT PHYSICAL CHAR ADDRESS
PCHAR:
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 …
... /> ; Get GFX for char and add offset based on pixel position ... HL CONTAINS SCREEN ADDRESS
; DE CONTAINS CHAR ADDRESS
; ON ... /> ; DE CONTAINS NEXT PHYSICAL CHAR ADDRESS
PCHAR:
8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... hardware scrolling. The display address is formed from on offset ... on, you can achieve pixel perfect scrolling by literally moving ... a flexible. You can get byte at a time scrolling ... additional hardware registers to control pixel scrolling in both directions ...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…
... = screen address
; on exit hl = address of next (pixel) row down ...
ld c,(hl) ; get last screen address and store new one ...
ld e,(hl) ; get new graphic address
inc hl
ld c,(hl) ; get last graphic address and store new one ...Help required to calculate screen addressesDoes anyone have some code that calculates the screen address one pixel below the given address ? Is it best to use a lookup table ? Any examples of …
... calculates the screen address one pixel below the given address ? Is it best ... near the bottom, you'll get an article about the pattern ... move up or down by pixel amounts.
If you ... single pixel (or :cool:, it is faster to modify the screen address ...
