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Detecting a Kempton joystick...I've been playing with the idea in the games I'm currently developing so that once the Kempston joystick has been selected you can hold FIRE down to …
... ULA is pulling screen and attr data off of RAM.
value 56", hence my line of ... -
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…
... rather than than a (mask,attr) pair. I will have ... /> I construct the mask value then apply the mask to ... the attribute value before it is written ... writing out a constant value x number of times?< ... only writes out 1 mask value (with the attribute mask ... -
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…
... 247028]I construct the mask value then apply the mask ... to the attribute value before it is written ... value x number of times?
[/quote]
The (attr_mask, attr ... mask value to all sprite characters when outputting the (attr_mask, attr) ... -
New oneliners for 2008[INDENT][INDENT][INDENT]Here's my attempt at a first-person-perspective 3d game in one line of BASIC. It's called 'wormhole', and you've got to get t…
[QUOTE=bigjon;256767]I started to think about doing a lightforce-style scroller[/QUOTE]
Looks promising!
Notice that instead of this:
[CODE]
s-(IN 64510 -
'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…
... it's probably the right value.[/QUOTE]
Thanks for ... by the blockiness of the ATTR squares though. Of course you ... -
'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... =fog;447728]it would be "ATTR" ? $AB? for bright
$DA ... codes are those with a value under 32.
So ... -
Screen$ command, ROM routineHi All, Does anyone know which ROM routine to call for the Screen$ command (and/or the ATTR command)? Any comments on how well it works or the spee…
... Screen$ command (and/or the ATTR command)? Any comments on how ... />
SCREEN$ will store the value on the stack and you ... must get the value from it.
I ... -
Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... is that two bytes (screen + attr) must be read at almost ... attribute address are of same value, and that's all you ... /> [code]
ROW HEX RASTER/ATTR BIN RASTER/ATTRIBUTE
1 ... -
Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…
... [B]POKE [/B]the [B]ATTR P [/B]system variable and ... />
The value [B]POKE[/B]'d to [B]ATTR P [/B ... -
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... moving the cursor within a value and inserting additional characters. Even ... REM
790 POKE p,ATTR (i2,i1+i7): PRINT AT ... -
IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... on c64.. ya get the value of the keyboard buffer (or ... k=23560
230 REM ATTR P
240 LET p ... =23693
250 REM Setup ATTR storage
260 GO SUB ... -
So easy to use.Back in the 90s I was off work for 3 months following an operation, anyway in my boredom I dusted off my old speccy+ and the manual, and got my head …
... /> where 23693 is the [B]ATTR P[/B] system variable.
where [B]ATTR[/B] is:
INK ... then I would POKE a value of 86 (6+(8*2 ... -
Is there a limit to the numberof variables you can have in BASIC..... Reason I ask is I've got an idea....but using my "lowest common denominator" approach to code I fear that I'…
... a cause;598080]Use the ATTR command to check screen locations ... what I'm reading says ATTR assigns things like colour, flash ... 'm looking to assign a value
so....
IF....AND......THEN statementsSorry...more questions Now initially I thought this should work....but now thinking about it it is doomed to fail as if the player's x co ordinate a…
... black paper?
Your ATTR 1 will match any character ... ,5;"a"
30 PRINT ATTR (20,5)
< ... line 2090 checks the same value of xred, but if ... is not checking the same value of xred as was checked ... what I want is the value of redpill to be ...question re. STR$ bugCould someone point me to whereabouts in the ROM this goes wrong? [code]PRINT PAPER 5;1;STR$ 234[/code] (Only the "1" prints in cyan.) It's not the m…
At a guess it's caused by STR$ switching to channel R and thus forgetting about the temporary value in ATTR-T.question re. STR$ bugCould someone point me to whereabouts in the ROM this goes wrong? [code]PRINT PAPER 5;1;STR$ 234[/code] (Only the "1" prints in cyan.) It's not the m…
... STR$, having saved the channels value before setting channel R, restores ... the value and then calls the channel ... , and that sets ATTR-T to hold the value of ATTR-P.
Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
... (10) = 11000(2). Shifting this value 5 times left moves bit ... bits 0 and 1), buts value of bits 0-2 do ... ).
2. Start of attr ram is 0x5800(16) = 0101 ...Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…
... = ATTRIBUTE FILE ADDRESS
a = ATTR(b,c)
DF-CC ... and sets ATTRIBUTES to the value given in ?a?.
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... . (I want to bit diddle ATTR-P) but the example I ... ; LD A,02 [I]Load value of the chanel I want ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
...
; THE 'FETCH A VALUE' SUBROUTINE
org 0x1c56
ld hl, (attr_t) ; attr-t and mask-t to ... /> ld (attr_p), hl ; HL to attr-p and mask-p
ld (hl), a ; write new value
res 6, (iy + _p_flag ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ld a, b ; second value
rst print_a ; print ... character
call class_1 ; get value
set 7, (iy ...
call val_fet_2 ; get value
rst get_char ; get ... c ; value to A
call co_change ; update attr-t
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... value to A
xor e ; mask-t
and d ; attr ... set new attribute value
ret ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ld hl, (attr_t) ; get attr-t
push hl ; ... call cl_set ; give matching value to df-cc
...P47 Thunderbolt Colour/Attribute hacking?I've seen someone (can't remember who now, sorry) hacking into monochrome games such as After The War and Outrun Europa and adding/changing the colou…
... PAPER blue & INK cyan (ATTR=1*8+5=13), the ... continuous chunk of the same value as the playing area is ... a row are: 00 00 {ATTR*28} 00 00.
P47 Thunderbolt Colour/Attribute hacking?I've seen someone (can't remember who now, sorry) hacking into monochrome games such as After The War and Outrun Europa and adding/changing the colou…
... of each pair is the ATTR code for the main playing ... the ATTR colour scheme for all levels to the (HL) value - and ... /> ld hl,$8A11 ;start of ATTR codes list
ld (hl ... /> ld bc,15 ;size of ATTR codes list - 1
ldir ...SpecBAS 0.800 Released!Hi folks, it's that time again for another release. I was going to add a few more features, but I have other projects on the go at the moment, and it…
... : CLS
30 REM some value checks
40 INK 1 ... ,0): PRINT ATTR (0,1): PRINT ATTR (0,2): PRINT ATTR (0,3 ... ): PRINT ATTR (0,4 ... ): PRINT ATTR (0,5 ...
