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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…
... ; **********************************
; xy coords to screen pixel position
; **********************************
... store h for later
push bc ; 11t - store ... again
; *************************************
pop bc ; 10t
ld ... -
Frank N SteinThis is an improved bugfix for [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0001849"]Frank N Stein[/URL] as discussed recently in [URL="htt…
... with the screen data. The worst case is an implicit PUSH caused ... /> org $C472 ; 50290
PATCH1: POP BC ; 193
CALL $81A4 ... -
SpecBAS 0.690 Now AvailableHi folks - 0.690 is now available at the usual location: [url]https://sites.google.com/site/pauldunn/SpecOS.zip[/url] You can also download the rece…
... /site/pauldunn/twister[/url] - just pop it somewhere specbas can see ... :" assign.
New filesystem commands - COPY/ERASE/MOVE/MAKEDIR/RENAME, also ... to flow incorrectly.
PALETTE COPY didn't update the internal ... -
Kiwi OS for z80 computerHi everyone, Nearly made my z80 computer with 2K ROM 32K RAM. It has an OS im still writing called Kiwi (apple, blackberry, you get the idea ;D) he…
... ;************************************
PRINT_DHEX
PUSH DE ;REMEMBER D
LD ... ;PRINT HEX NUMBER
POP DE ;RESTORE D
POP HL ;RETRIVE THE ADDRESS ... /> LD A, $01 ;CLEAR SCREEN COMMAND
OUT ($1), A ... -
Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... /> call ROM_CLS ; do the clear screen
ld hl,msg_define
push hl ; save the message address
ld a,2 ; upper screen ...
call CHAN_OPEN ; get the channel sorted
pop hl ... -
Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... :]) then scrolls the screen down 8 lines then ... ; Point to next screen position before POPing HL< ... Preserve registers
push de
push bc
push af
< ...
pop af
pop bc
pop de
pop hl ;
Find-Fill-Copy functions for BASICThere's not much going on here, so here's three m/code routines to provide some data manipulation functions which are otherwise slow to do from BASIC…
... INT PI",fill)
* [optionally copy string 'c' to address 'a ... /> will set the top four screen lines to green on black ... initialisation string is defined then 'copy' will start from the top ... jg27paw4/pourri/find-fill-copy.zip]Find-Fill-Copy.zip[/url] . The ...Print Screen not Working on Windows 7I know I know this is chit chat and not a tech support forum. I ask here because the info on the web about this issue is generally shyte. I'm asking …
... the "Print Screen" to commit the current screen to the clipboard ... is not working. I can copy ... text or images and these get onto the clipboard but screen ... dumping via the print screen feature does ...Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
... avoid messing up the screen when they are expanded. ...
push af
call FETCHS
pop af
push af
ld de ... SSNEXT2:ld a,(de)
push af
and $7f ...Invalid combination of operands and opcodesIt says the error in the title, why is this?? [CODE] ORG 0000 LD HL, 63000 ;LOAD HL WITH STACK LOCATION LD SP, HL ;SET STACK POINTER TO HL LD A, …
... DELAY LOOP TO SHOW SPLASH SCREEN
NOP
... IT!
EXIT_MENU_FUNCTION
POP A ;RESTORE A
LD ... ;*********************************
ASCII
PRINT_LOOP
PUSH AF
LD A, (HL ... UNTIL B = 0
POP AF ;RESTORE A
RET ...Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…
Here's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in variables (or expressions which evaluate to variables). Some of this can already be done with VAL or VAL$, ...MinnaMicroZ80 v0.21 - Z80 Snapshot to Microdrive converterMinnaMicroZ80 v0.21 - The Z80 to Microdrive Snapshot Converter -------------------------------------------------------------- Written by Rob Shepherd…
... /> If you like this software, pop along to [url]http://www ... top third of
the screen, so the best place to ... it wipes the loading
screen.
I might make ... ";1;"Games"
Then copy the BASIC loader from GenericLoader ...28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... point of the screen
PUSH DE
PUSH HL
PUSH BC
POP HL
POP DE
POP BC
exx
POP HL
POP ... DE
POP ...What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…
... ld (23693),a ; set our screen colours.
xor a ; quick ... outermost bit = key 1.
push af ; remember the value.
pop af ; restore accumulator.
...Jelly-Vision!As threatened in the "'Spectrum Play' Error" thread, here's a ruff'n'reddy interrupt driven full screen wobbling routine which has no practical use w…
... ) ;TV_FLAG printing in lower screen?
jr nz,TESTSCROLL< ... jr z,INSCROLL
push bc
push de[/color]
pop de
pop bc
INSCROLL: pop hl
NOWOBBLE: pop af ...'Renegade' loading screenHere's a photocopy of the original 'Renegade' arcade artwork that came with the arcade board when it arrived at Ocean Software. This is the artwork t…
... Fowles based his Spectrum loading screen on, the Bob Wakelin artwork ... screen. I've looked on the internet and cannot find another copy ...next pixelI searched the "Discussions" groups for the phrase "next pixel" and got no matches - and removing the quotes it discards the "next" and just searches…
... with printing stuff to the screen, I rediscovered this [url=http ...
ld l,e
push bc
sla b
add hl,bc
pop bc
jr pixrow
multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width isRCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... from the ZX-Spectrum screen to significantly improve compression ... specialized routines for ZX-Spectrum screen compression.
... />
The same screen, reordered with RCS before compressing ... ZX-Spectrum screen is organized as follows (copy/paste this ...How do you restrict this routines actions?I'm trying to plagiarise a piece of code I came across in the 80's, but seem to be banging my head against a brick wall! The routine fades the scree…
... />
The routine fades the screen, but I am only wantin ... the bottom of the #2 screen area (i.e. not #0 ... : ld b, 16
l_b7d5: push bc
jr l_b798
jr nc, l_b7db
pop bc
djnz l_b7d5
Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... machine with a character-mapped screen and render that as fast ... be wise to copy the attributes to the main screen at least ... drawn, to try to minimise screen tearing.
The UDGs ... is larger than the rendered screen and/or wraps-round horizontally ...MIA: Magic Worm - is my copy good enough?Years ago when I was a teenager in Sheffield, I was given a copy of Magic Worm by the chap who lived next door to my grandparents. His son (Richard H…
... Sheffield, I was given a copy of Magic Worm by the ... archive page states, and the screen presented after loading has the ...Strike Force Cobra (Piranha) (Preview Copy 7.8.86)Hiya! I picked up a bunch of games recently and inside the Strike Force Cobra box were two tapes. One was the regular release and the other had a pla…
... with "Strike Force Cobra Preview Copy 7.8.86" typed on ... legit. There's no loading screen, no team selection, no sound ... on the status report/pause screen. Why it was knocking about ...Laptop graphics issue: getting booted out of full-screenHi guys I have a relatively trivial but exremely irritating problem that's driving me nuts. In the last few days I've noticed that if I have an appl…
... have an application running full-screen, like MAME or Spectaculator, I ... minutes with no explanation, no pop-up, nothing. I've uninstalled ... get kicked out of full-screen. Even when I'm working ... really miss having stuff full-screen for as long as I ...Specteculator + Plus D + SCREEN$Today I'm running in a little problem with spectaculator and +D. I was doing the following: I would like doing a dia show containing about 100 SCREEN…
... dia show containing about 100 SCREEN files from disk. :smile:
[I]59 Snap2S 14 SCREEN$
79 ???@?? COPY COPY _P04 $.ARRAY
80 ...Works in Fuse & SpecEmu, not ZXSpinI decided that I wanted to change the scroll routine which I was using for compiling the Trailblazer maps, as I'd just copied it out of Andrew Hewson…
... method for scrolling the screen, which is twice ... /> CHARSCROLL:
push ix
push iy
ld ... nz,SCROLL0
pop iy
pop ix
... jr nz,PRINT2
pop af
ret
quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... Although the routine will copy any length it obviously ... /> 41 REM TO COPY string to RAM or ... br /> l =length to copy
43 REM eg.: ... copies top 1/3rd screen to bottom
44 ... br /> REM bounces around a screen segment
[/code]
Childhood moments with my SpeccyHey everyone. The other day I randomly came across a tumblr page called "Me and My ZX Spectrum" ([url]http://meandmyzxspectrum.tumblr.com[/url]) …
... the Atic Atac loading screen was done intentionally, to ... was looking at the screen, mesmerized, thinking that I ... The TV had 12 push-buttons for preset tuning ... friends also had their copy so we were all ... at the message on the screen that read: CONGRATULATIONS! ...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…
... assembly/machine code... No fancy screen shinanagins, just data storage and ... the specy (with a load screen and perhaps even a turboloader ... />
Whats needed is to copy the manipulated register to the ... wonder what happens if i push the value from B into ...
