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Spectrum 128 Graphics - A missed opportunity?The Spectrum 128 is my favourite model of the Spectrum - the pinnacle of the Sinclair miracle before it was hijacked by Amstrad. But I can't help thi…
... br /> [quote]Or a intensity attribute map that allow to steer ... of each attribute cell 0-255?
a additional byte that controls ... the brightness of a attribute cell. 0 ... you have a six bit attribute cell in that case. Although ... -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... into pallette entry 0, the attribute red on black. Into pallette ... virtual colour to the physical attribute.
2.
A ... . Your program uses a single byte or integer to identify which ... -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... . Most likely working on an attribute level will do just fine ... are more advantages to the "attribute" method other than speed and ... cover the entire display. Each byte stores relevant background information like ... -
T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... LDI as it takes 16t/byte
ld (...), ... of code for every byte moved but u need ... only 13 t for a byte
[/quote]
attribute combination to generate the different ... to consider a 30 byte wide x 96 vertical ... -
Hardware section....Wonder why here is no specific hardware forum??? No one ever touched a soldering iron here? (o; I'm kinda lost here with my hardware stuff under: "…
[quote]Do you see any problem imlementing this in a PIC ?
[/quote]
Implementing video in PIC?
It needs to read 1-byte every 640nsec during horizontal display and combine it with the attribute memory. -
Hardware section....Wonder why here is no specific hardware forum??? No one ever touched a soldering iron here? (o; I'm kinda lost here with my hardware stuff under: "…
... -byte every 640nsec during horizontal display and combine it with the attribute ... -
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] ; ***********…
... br /> ; ********************************************
#define DEFB .BYTE
#define DEFW .WORD
Byte back, so H now is ... 0 = off
; 11 = Attribute Color
; 12 = blank< ... -
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] ; ***********…
... br /> ; ********************************************
#define DEFB .BYTE
#define DEFW .WORD
Byte back, so H now is ... 0 = off
; 11 = Attribute Color
; 12 = unused< ... -
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 …
... assembler instructions
#DEFINE DEFB .BYTE
#DEFINE DEFW .WORD
LD L,A ; GET HI BYTE BACK, SO H NOW IS ... A SCREEN ADDRESS TO AN ATTRIBUTE ADDRESS
; LD A,H ... -
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 …
... assembler instructions
#DEFINE DEFB .BYTE
#DEFINE DEFW .WORD
LD L,A ; GET HI BYTE BACK, SO H NOW IS ... A SCREEN ADDRESS TO AN ATTRIBUTE ADDRESS
; LD A,H ... -
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 …
... assembler instructions
#DEFINE DEFB .BYTE
#DEFINE DEFW .WORD
LD L,A ; GET HI BYTE BACK, SO H NOW IS ... A SCREEN ADDRESS TO AN ATTRIBUTE ADDRESS
; LD A,H ... -
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…
... />
[code]
#DEFINE DEFB .BYTE
#DEFINE DEFW .WORD
attribute address
; on entry: de ... has the following format:
; Byte Description
; 0 Sprite ... -
Spectrum programmingI have a Spectrum+ at home. I tried to write some programs in BASIC (IIRC i wrote a breakout clone in which you had to hit those spider-like characte…
... . After which there is an attribute overlay for each 8x8 block ... the byte representing a pixel) but the layout is not. The attribute ... -
New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
This is what I've compiled so far:
[quote]Resources
=========
* Make all caps
---------------
You can turn CAPS LOCK on or off using a simple poke to 23658:
POKE 23658,8: REM CAPS ON
... -
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…
The code to find the attribute address is very similar. Basically, ... and add 88 (the high byte of 22528, the start of ... to return BOTH display and attribute addresses, insert this before the ... display address in HL and attribute address in DE, and carry ... -
BombjackThis has to be one of my favourite games ever. I've seen many Jet Set Willy remakes and some other remakes of great games. How easy / hard would it…
... must remain black (hence the attribute clash) :/
No.3 ... compressor that needs sortin' (odd byte near bottom right and glitch ... -
The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... get more than one colour attribute per 8 pixel line.
byte.
You have to ... -
What happens during a reset?I always used to wonder about this, but only thought a bit more about it last night when noticing after all these years what actually happens. Obvio…
... being set in the screen attribute space too?
Oh ... were correct about decrementing a byte once and then again before ... -
z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
...
There are also attribute masks in the new engine ... insert a constant mask byte that can be hand ... each pixel byte can have a unique attribute. I think ... colour tiles - a single byte identifier associated with an ... 8-byte attr "UDG" in ... -
z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... my code file using a byte ordering that captured attr ... direction :smile:
About attribute masks: these came about for ... for a special transparent colour byte during draw. Another is that ... single constant mask byte to preceed the attr byte in the ... -
z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... only):
- The 1-byte definition which is graphics only ... (no mask)
- The 2-byte definition which is made up ... .
There are also attribute-only sprites with no associated ... change the colours of an attribute sprite. So there's no ... -
z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... into a 8-byte pixel buffer and a single byte attribute buffer, which ... -byte or 2-byte (mask is 2-byte only, the others if 2-byte ... -
Getting attribute location from a screen coordinates (x,y)I am having trouble figuring out how to convert an x,y coordinate pair (pointing to a specific pixel) to the location of the attribute for the block …
... pixel position within a byte. 0=leftmost pixel position ... br /> [B]4. 16-bit Attribute Address[/B]
...
; Computes the attribute address corresponding to a screen ... ; exit : hl = address of attribute square
; uses : af, ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... /> uchar colour; // +1 background tile attribute
uchar tile; // +2 background ... to an 8-byte pixel buffer and a 1-byte attribute buffer. Then ... copied into the pixel and attribute buffer and any sprites ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... OR draw functions. The 1-byte draw functions are around 42 ... more faster than their 2-byte counterparts.
Something ... want for the sprite. The attribute mask has individual bits set ... the portions of the underlying attribute we want to keep. Then ... -
ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... /> uchar attr_mask; // +6 attribute mask logically ANDed with underlying ... RED-INK only (the attribute was set to INK_RED ... with zeroes elsewhere, the attribute mask set to INK ... occurs depends on the rflag byte. Allowable flags are:
Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... ;
; Outputs ;
; hl - the attribute address for the screen location ... ; no, get lower byte of address 1M 4T
TommyGun 0.9.1 availableMostly bug fixes, especially an annoying copy/cut and paste bug in the image editor. Should be available from the Utilities page once it has been up…
... as Gfx+Attr with the "Byte sort priority":
Char line ... /> and interleave at Character (aka "Attribute as 9th byte" in previous versions)New Speccy Image EditorHi, This is my first time in the forums at WoS. So 'Hello all'. I have written a little image editor over the christmas break, last 12 days or so. …
... pixel, 32x192 colour (one attribute per pixel byte). The MSX1 machines also ...New Speccy Image EditorHi, This is my first time in the forums at WoS. So 'Hello all'. I have written a little image editor over the christmas break, last 12 days or so. …
... pixel, 32x192 colour (one attribute per pixel byte). The MSX1 machines also ... colours on any one attribute per pixel byte.
Sam Mode 1 ...
