-
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... .
rrca ; multiply by 32.
rrca
rrca< ... get y displacement.
add a,l ; add to low byte.
rrca ; multiply by 32.
rrca
rrca< ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... .
rrca ; multiply by 32.
rrca
rrca< ... get y displacement.
add a,l ; add to low byte.
rrca ; multiply by 32.
rrca
rrca< ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... position.
rrca ; multiply by 32.
rrca
rrca< ... ld a,l ; get x*32 again.
and #224 ; ... get y displacement.
add a,l ; add to low byte.
rrca ; multiply by 32.
rrca
rrca< ... ld a,l ; get x*32 again.
and #224 ; ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... .
rrca ; multiply by 32.
rrca
rrca< ... ld a,l ; get x*32 again.
and 224 ; ... get y displacement.
add a,l ; add to low byte.
assembler emulator or cross platformHi I have another question about cross compiling speccy assembly code. So using Pasmo as an example. If I was assembling code in Zxspin I can asse…
... , 25, 26, 28, 29, 30, 32, 33, 34, 35, 37, 38 ... /> [/code]
I then add a line to my build ... run as the first step, add [code]include "sinewave.asm"[/code ...Hacking a +2 into a shorter caseIf anyone's got a copy of the notes or text they posted about re-wiring the +2 joystick ports or hooking up a tape recorder to the motherboard casset…
... /> Mar 18, 2015 15:04:32 GMT 1024MAK said:
All ... 's what I meant - to add my own jack socket. So ... />
May 11, 2015 16:32:31 GMT 1024MAK said:
add a tape in (ear) socket ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
Here's something which I converted from a BASIC routine in ZX Computing. The smallint conversion can be discarded if row,col are not derived from some calculation which might render a floating point result. (I can't get the code block to print fixed width, ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... br /> and 224
add a,64
ld e ... ld a,d
add a,8
ld d ... a
add hl,hl ;x2
add hl,hl ;x4 ...
add hl,hl ;x8 ... font address here
add hl,bc ;HL now pointing ... ld a,e
add a,32
ld e,a
Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... and %11111000 ;A =%000ss000
add a,%01000000 ;A =%010rrrrr
add hl,hl
add hl,hl
add hl,hl ... ld a,e
add a,32 ;increment row rrr
ld ...Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc. There is an interesting…
... do with binary numbers :- you add the number shifted left three ... multiplying the result by 8 (add 3 to the power of ... simple matter of shift and add with no loss of binary ... , despite having fewer mantissa bits (32 vs 40), manages to get ...Arcadia and Ah Diddums keyboard bugfixesHi all,<br><br>I did these while the forum was away and sent them to the Tipshop, but thought I might share here too for anyone who's interested.<br>…
... I've created patches to add Kempston support to them both ... 96
POKE 29247, 32
POKE 29256, 88< ... br /> POKE 29257, 32
POKE 29268, 72< ... , 64
POKE 29281, 32
Ah Diddums ... 29625, 64
POKE 29626, 32
Ah Diddums ...Multiplying. Again.Is there a faster way of hl=a*32 than doing add hl,hl 6 times?<div><br></div><div>I get the feeling that working with 8 bit registers for most of it …
HL=A*32 using ADD:
ld h,0< ... ,a
REPT 5
add hl,hl
ENDR
HL=A*32 using RLD:
ld ... )
ld h,a
add hl,hl
The ...Multiplying. Again.Is there a faster way of hl=a*32 than doing add hl,hl 6 times?<div><br></div><div>I get the feeling that working with 8 bit registers for most of it …
Multiplying by 32 means you bit shift the ... the non-overflowing part with ADD A,A's and the ... rest with ADD HL,HL's
Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc. There is an interesting…
... />
sdcc's is a 32-bit float (like IEEE single ... struggles with generating code for 32-bit longs (the floats are ... observe this? Maybe we could add a TAU keyword to Sinclair ...Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc. There is an interesting…
... .
sdcc's is a 32-bit float (like IEEE single ... struggles with generating code for 32-bit longs (the floats are ... entirely. That said, using a 32-bit float type might have ... I take. I’ll happily add test cases to existing test ...I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... or 8 thousand a level 32 stealth guy comes along and ... /en-GB/download/history to add stuff to the queue then ...Peeking the contents on screen? How?You will have to forgive me for growing up on the C64, but I know I can peek the location of a character (1024 is top left from memory) and the peek …
... more sensibly from address 22528, 32 bytes per row, for 24 ... , it means you can just add 1 to move to the ... next character, or add 256 to step down through ... character. And the Z80 can add 256 to a number as ... quickly as it can add 1, so there's some ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... /> push hl ; store hl
add hl,hl ; hl=hl*2 ...
ld hl,#_con_font6x6
add hl,de ; hl points to ... /> ld a,l
add a,#32
ld l,a
.byte 33, 4, 16, 32, 0, 32, 65, 4
.byte ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... hair out and trying to "ADD 1" amongst other things it ... /y coords.
ld a,32 ; ASCII code for space.
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... ; get character gfx - minus first 32 chars
ld b, 0 ...
REPT 5
add hl, bc ; character gfx offset ...64k speccydoes anyone have instructions on how to use the extra 16k found in some spectrums?
... of two dif-
ferent 32 KB DRAM banks at address ... ]
And may I add that this is another unique ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
...
#define BytesPerLine 32
#define ScreenHeight 192
32
tax ; save as character ... /> sta >fscreen
; add the column
lda col ...is it possible to display code being loaded in a loader?hi, is it possible to display code being loaded in a loader?
... second "CALL Code_N" at lines 32 & 208 in the assembler ... existing code before attempting to add any formatting code.RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... br /> ld bc,FONT_ADDR-224 ;add font address - correct for missing ... l
ld bc,32 ; 32 bytes per line, used to ... ; next font data location
; add hl,bc ; next line
; add hl,bc ; next line
Games not compatible with the 128+ & grey +2Like the +2A & +3 thread, there are a few games that do not work correctly on the original 128+ and the grey +2. Two games that I know of that wil…
... /> ld ($fdfd), a ; 8900 32 fd fd $0dts
ld ... ld ($fdfd), a ; 5ba0 32 fd fd $0dts
ld ... ), bc ; 5bac ed 43 32 be $14ts
ld ... now
add hl,bc ; otherwise add another 10 so ... /> inc c ; otherwise add 3 to length of decrypter ...Fixed point math lib?Is there a liberally licensed fixed point math lib for z80 somewhere? When searching, I expected to find a bunch of GPL'd ones and perhaps one or two…
... one (eg start at 32 by 32 and realize that the first ... is zero so go to 32 by 24, etc) then you ... as I'd like to add it to a C compiler ...Fixed point math lib?Is there a liberally licensed fixed point math lib for z80 somewhere? When searching, I expected to find a bunch of GPL'd ones and perhaps one or two…
... />
ld a,c
add a,e
ld b ... /> ld l,a
add hl,de ;hl holds (c ... ,$2e,$2f,$30,$31,$31,$32,$33,$34,$35,$36,$37 ...Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…
... add hl,hl
add hl,hl
add hl,hl
add ... : ;perform an action
add a,a ;byte to word ... ld bc,print_jp_table
add hl,bc
ld a ... ld a,e
add a,32
ld e,a< ... 0, 68, 0
db 32, 32, 66, 68, 68, 132, ...Spectrum Screen RAM layoutHi there The spectrum screen layout is rather odd. It seems to be arranged into 3 256 byte groups. If I have an x (horizontal) coordinate (from…
... as 24 sequential rows of 32 bytes (another 768 bytes).
add 1 to it to move ... the right, or you can add 256 to it to move ...
