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Strange layout of Spectrum video memoryHello, does anyone have an idea why the Spectrum's video memory has such a strange layout? I understand that a resolution of 256x192 is an easy mean…
... the next pixelrow from a character. For PRINT the screen is ... printable char
LD HL,16384 ; or any other screenposition
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…
... caps off
* Different character sets and UDG sets
character set when PRINTing, LISTing, etc ... is signified by the last character in the message having bit ...List of RANDOMIZE USR code effects?Hi chaps, Does anyone have one of these please? Thanks.
... 65536 memory locations; the first 16384 of these are occupied by ... by the program (e.g character set definition), etc.
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…
... one "struct sp1_cs" for each character making up the sprite. Where ... . That will leave 0xc000-0x8000 = 16384 bytes available to our program ... create to describe each sprite character. Memory for 90 of these ...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…
... ld hl,16384
ld a,(shipx) ;calcuate character column from ... />
ld a,(shipy) ;calcuate character row from shipy value
character line down. But then, ... of the screen (now one character line down)? Regardless of ...Help where do i startIm thinking of writing a game or two for the speccy. At the moment Im not sure what type. But Im after some general info. I know laguages like Basi…
... . It starts at memory address 16384 - you can write a short ... a specified 8 x 8 character cell. It's a useful ...Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... file as background. The character code 0 is hi-jacked ... the 2nd display file from 16384. The engine uses the address ... memory used for struct_sp1_updates per character the engine manages. Right now ... it will also mean each character square can have background ...16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.
...
30 REM ! ld hl,16384
40 REM ! ld de ... ,16384+2048
50 REM ! ld ... be at least 1 space character between ! and the op-code ...Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... top line of the 8x8 character square (as in attribute square ... />
[code]
for z=16384 to 22527: poke z,255 ... move to the right one character position. When CCCCC=11111 (31 ... LLL occurs. LLL is the character row, so you'll see ...Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... =0008932[/url]
A character editor, a program Renumber and ... />
To use - PRINT USR 16384
The acid test ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... />
loadgraphic
ld hl,16384 ;screen address
ld de ... to right
ld hl,16384 ;screen address to start at ... /> dec hl ;move back one character to the left
Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... />
loadgraphic
ld hl,16384 ;screen address
ld de ... to right
ld hl,16384 ;screen address to start at ... /> dec l ;move back one character to the left
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... memory. Access to memory addresses 16384 to 32767 slows down a ... your sprite is on a character boundary vertically, use (say) INC ...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…
... program a simple 32 column character scroller in C as a ... spaces. With another non-space character added to the end the ... message scrolls up to that character and stops as it should ... (uchar attr)
{
memset(16384, 0, 6144);
memset(22528 ...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…
... br /> ///////////////////// Install Next Character //////////////////////////
///////////////////////////////////////////////////////////////////////
... attr)
{
memset(16384, 0, 6144);
memset ...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…
... br /> ///////////////////// Install Next Character //////////////////////////
///////////////////////////////////////////////////////////////////////
... attr)
{
memset(16384, 0, 6144);
memset ...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…
... installs a new double-width character-half and scrolls it ... blit() functions when a new character is installed. This way ... installing the new double-width character-half.
Any ... attr)
{
memset(16384, 0, 6144);
memset(22528 ...IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …
... it uses the ROM's character set. We therefore need ... to include a character set in our new ... with the address of our character set.
... to $8000 and the character set to $BD00. It ... [CODE]SAVE "jetROM" CODE 32768,16384[/CODE]
Burn ...IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …
... /> DEFM "SAVE rom CODE 49152,16384"
DEFB $0D+$80
3D00-3FFF - copy of character set from ZX ROM.
Dump Sinclair character set to file?Hi guys, I'm working on a version of Manic Miner for the TI-99/4A. It's not a port, as I'm not looking at the original Z80 code, just re-creating th…
[QUOTE=Mark Wills;280685]I can't remember where the character set is in the ROM[/QUOTE]
This should do the trick:
[CODE]
SAVE "font" CODE 16384-768, 768
[/CODE]
Patrik'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... rather than an orange-looking character square) on a 128k machine ... BRIGHT RED
ld hl,16384+6144
ld (hl),80 ...Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…
... to have a static four character blocks to write many times ... PRINT AT-position).
16384 = H=64, L=0
Difference in emulator screen sizes and coloursSeeing as Greencard's gone out drinking... I've done a comparison between Spectaculator and ZXSpin. ZXSpin's full screen with border is taller than S…
... calculations as possible without causing character flickering: although the [URL="http ... first byte of the screen (16384) is displayed. At least the ...What is exactly the scr format?Hello everyone and I hope you are having a wonderful Christmas. I'm trying to understand the use of the scr format. I understand it's a screen memor…
... 'PRINT USR 16384' . Now their functionality - disassemblers, renumber and character editors are ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... br /> JR QP_LOOP2 ; next character
QP_PADDING
QUICKPRINT
; Print character in 'A'
; at ROW ... 16384)
; write attribute byte QP_ATTR and use character ... /> POP AF ;Restore the character
;We need ( ...How does the Speccy deal with the Character Set?Hi All, Can anyone spare a little time to explain to me the basic Assembly method of how the Speccy interprets and retrieves Characters to print on …
... value of the current character to print,
... As the first printable character is SPACE (ASCII 32 ... 16384 ;prepare a screen addres
LD A,"H" ;fetch the character ... calculating (related to character positions on screen).
Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
... the individual bits of a 'character' and holds no indication whatsoever ... Spectrum using
. 10 FOR 16384 TO 23295
. 20 POKE ... 80 sec.s. Apperently each character is synchonised by hardware signals ...Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
OK, I've coded this to add a @DEEK function to Spectrum with IF1.
The caveat is that it only works within a LET statement, in this form:
LET n=@DEEK v
Where 'n' is any numeric variable, and 'v' any numeric expression BC (or ...
