-
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
...
ex af,af'
xor a
out (254),a ... /> ld b,a
ld c,a
ex af,af ... the load succeeded
ret c
;; if the load ... -
Hungarian notation for asm - Yes or No ?There is thing called hungarian notation - https://en.wikipedia.org/wiki/Hungarian_notation Basically it is all about using prefixed indetifier to i…
... ai_player)
xor 3
ld c, a ; C = opponent
ld c, a
pop af ... af'
ld c, a ; C = player
ld ... -
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 …
... .
LD C,A ; store in C as an intermediate ... />
LD A,C ; bring back intermediate result from ... ; screen $00 - $02
XOR $58 ; combine with base address ... -
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…
... jr pc_main
no_clip:
xor a
pc_main:
ex ... /> srl c
srl c
add c ; l=l+c, we know ... /> ;; a=shifts
ld c,a ; num shift
push ... shift is done
ld c,#0x00 ; c=0
pch_shift:
Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... have been made standard (^=bitwise xor, &=bitwise and, etc) so ... sdcc (and the new z88dk c lib) the nirvana lib needs ...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…
... /> ld b,h
ld c,l ; now BC = char
jr c,RIGHTSIDE ; carry is still set ... of the font byte
xor (hl) ; combine half screen and ... of the font byte
xor (hl) ; combine half screen and ...r-type in development for the sam coupehttp://cookingcircle.co.uk/ we need z80 coders graphics artists and audio this is the amstrad cpc 6128 version: https://www.youtube.com/watc…
...
29D3 4F LD C,A ;C'=BLOCK WIDTH
29D4 ...
29D5 ;B'=LEN, C'=WIDTH, E'=DISP TO NEXT ... C,A ;INVERSE MASK
29D8 FDE9 JP (IY) ;JUMP TO XOR ... HL=SCRN DEST, B=BYTES, C=INVER
29DA ;EXIT WITH ... 29DA 79 PUTRET: LD A,C ;INVERSE
29DB 08 EX ...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…
... br /> ;******************************************************
mult_e_c_fast
xor a
ld d,a ... jr z,mect1
xor a
sub e
c
sub e
jr nc,mect2
xor ... ld h,>squares_lo
xor a
sub (hl)< ...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…
... pop de
ld a,c ;C holds charhalf - 240 or 15 ... to AND in C
bit 7,c
jr z ... ld a,(hl)
and c
ld (de),a
and c
or (hl)
... ret
;
no_key:
xor a
in a,(254 ...Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... br />
ld c,ZXIPORT
ld b,ULAPLUSADDR ... a,64
out (c),a
ld b ... nop
endm
xor a
jp (hl) ...ZX Uno programming competition[b]Rules[/b] - The game tematic is free. The languaje can be english or spanish. - You must use Radastan video mode in the game as principal. - …
... /> or d
out (c),a
inc hl
out (c),a
ld ... ld b,0ffh
xor a
out (c),a
128k Paging a tile routine to a double bufferHi happy new year all :) Does anyone have an example of how to page a routine to the screen ie a tile routine? Thanks :)
... /> ld a,(PAGE.screen)
xor #08
ld (PAGE.screen ... /> ld bc,#7FFD
out (c),a
ld (.current),a ...New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... (3 bytes)
IN A,(C) (2 bytes)
LD E ... )
After IN A,(C) must be instruction AND #1F ... A,(C) or replace joystick routine with this version:
XOR A ... of frame/border time
XOR A
IN A,(#1F ...(Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…
... ="guesser;857453"]cp (for [b]C[/b]om[b]P[/b ... in ZXSpin's assembler.
xor a
ld a,4 ...So I did a thing...And it's nearly ready for release: [img]http://s18.postimg.org/4453ayo5j/Screen_Shot_2016_03_30_at_16_18_17.png[/img] Apologies for the enormou…
... /> MAT INTERP a(),b() TO c(),amount interpolates values of two ... - %= (mod) ^= (power) &=,|=,~= (AND/OR/XOR)
The editor now ignores ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... ld b,h
ld c,l ;BC=random #
... coords address
ld c,(hl)
inc hl< ... $22e5 ;PLOT_SUB PLOT B,C=y,x
pop ... jr RANDEX
RAND_2: xor a
inc hl
Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... />
This is how the C compilers that use a frame ... /> ld e,c
ld d,b
xor a ; end ... /> inc hl
jr c, write_lp
; last write ...Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... char to left
ld c,(hl) ; c = spr graph rotated from ... b ; mask it
or c ; or graph rotated from left ...Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…
... functions)
POP BC ; C = x, and remove x from ...
LD D,C ; Move X to the proper ... br /> ld l,a
xor e
and 248
ld a,d
xor l
and 7
Reading sequential key pressesI am thinking about writing a quick game and have an idea that requires me to read alternate key presses. I’m thinking along the lines of Daley Thomp…
...
in a, (c)
cpl
ld c, a ; store key ...
A2 ld a, c ; restore key data into a ... sho all is working
xor 100
ld (22528), a ...Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... ; Get current parity
0xEAA0 XOR L ; Update parity
0xEAA1 ... LD A,C ; Get border color (ROM)
0xEB28 XOR 03 ; ... ; Into upper byte
0xEB62 XOR D ; Flip some bits in ...Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... 0x5B2A RST 20 ; in the C register whilst (ROM)
... br /> 0x5B2E JP C,1C8A ; REPORT-C Give the appropriate error ... /> 0x5B36 LD C,(HL) ; the C register and used to ... is finished.(ROM)
0x5B8F XOR A ; Signal 'statement zero' ...Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... secondary memory pointer
"B,C,D,E,H,L" 8 ... /> ld e,c
ld d,b
xor a ; end ... /> inc hl
jr c, write_lp
; last write ...
