-
my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
... or attribute 5 on ZX'screen is defined as the sum ... B, $ 16
L9DD3:
PUSH BC
LD B, $ 1F
push de; store value
inc ... attributes 2byte/3 byte
push hl
ld e, (hl ... -
calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
... /> begin
ld bc,#5b00
ld hl, ... sta sine+$00,y
push bc
exx
pop ... d,a
push hl
ld ... /> ld bc,#5b00
m1: push bc
ld a,(bc)
... /> call 022B1h ; calc screen BC=y.x
ld ... -
calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
... want to use the full screen).
--
Here ... a wavy line across the screen anyway. Whether or not it ... /> exx
push hl ;save HL'
ld bc,$5b00
ld ...
ld a,h
push bc
exx
pop hl ... -
RAM used / corrupted by +3DOSAs I said previously, [url=http://www.worldofspectrum.org/forums/showthread.php?t=41775]I'm trying to put some games in hard disk[/url] so they can b…
... ,($5b5c)
ld bc,$7ffd
push af
push bc
res 4 ... +3 disk. It does some screen corruption, but it does it ... -
Memory diagnostic toolIs there any sort of memory diagnostic tool for examining .Z80 files so I can easily identify large areas of blank memory? Scrolling through ZX Spin…
... a key when the screen is full. If ... 23678),a ;COORDS_y
push hl
call CHECK
push hl
push bc
call INC_X< ... br /> pop bc
... -
Screens and BasicA question about the ZX screens. I am using software to convert my own art and drawings to the ZX Spectrum. I have some tools to change .jpg files in…
... br /> XOR a
push bc
push hl
ld d, ... />
restoreMode:
push de
ld de, ( ... restore portions of the screen (the original just clears ... doesnt touch the screen attributes though. -
Disabling the +3 disk buffer; yes, but how?I would like to disable the +3 disk buffer in order to retrieve those 4K from the machine's RAMdisk. By reading the computer manual and some posts on…
... will disable the +3 disk buffer. This hardly makes any difference ... once, and a cache or buffer doesnt make hardly any difference ... A,7
LD BC,32765
PUSH BC
DI
LD ... /> LD A,16
POP BC
DI
LD ( 23388 ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... NC,UM6 ; be
PUSH BC
PUSH HL
LD L,(HL ... displacement in the already decompressed buffer is read from the input ... br /> POP HL
POP BC
JR UM0 ; goto next ...
DEC HL
PUSH BC
PUSH HL
LD L,(HL ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... QUOTE=joefish;707054]Also a PUSH takes 11 cycles, or 16 ... each PUSH is highly conservative. In my experience with double screen buffer ... enough, every time you access screen memory, you have 8 ... /> tacts of delay per screen memory access. Using words halves ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... 10 seconds to blank the screen ... but ... there's one ... br /> ld bc,0000 ;BC=counter
LOOP1:
push bc
;[ ... ld c,a ;BC=plot coordinates
push hl ;[color=red ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
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…
... pointer
dec bc ; decrement data length
push bc ; save new data ... the bottom third of the screen is loading.
In ... test program to load a screen
ld ix,16384
melbourne drawIt could be said I am easly pleased,:grin: Very nice peice of software. I was realy impressed by its ease of use. I think a lot of time and effort w…
... ;initialise screen attribute
ld bc,$fe00
LOOP1: push bc
ld a,b
cp $0d ;screen ... /> NEXT1: pop bc
djnz LOOP1
push bc
RETADD ...Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
...
95F2 28641 PUSH IX
95F4 28656 PUSH BC
95F5 28667 ... CALL #9E7A
9E7A 28705 PUSH IX
9E7C 28729 LD ... the routine which displays a screen. After about 2 seconds the ...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…
... used on the Arkanoid loading screen. RL coding isn't ... the structure inherent to a screen, and hence the loading ... just about recognizable as a screen, albeit a very rapid ... byte counter (past byte)
push bc ; save byte counter
...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... /> unsigned int score;
char buffer[100];
utoa(score ... ,(_score)
push hl
ld hl,buffer
push hl
ld ...
push hl
push de
push bc
push af
push ix ...JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …
... IY
LD BC, 64h ;AF
PUSH BC
LD A ... POP AF
LD BC,1932h ;BC
EXX
EX ... '
PUSH BC
POP AF
LD BC, 1721h ;BC'
... SP, 5FFDh ;SP
PUSH AF
LD A, 24h ... LDIR to clear the screen, and you can see ...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…
... relocated. Error-trapping and screen clearing have been removed, ...
;
ld bc,clearbase
push bc
ld de,(VARS ... /> ld sp,hl
push bc
ld (ERR_SP),sp< ...Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... to the original posted flip screen with attributes routine. Moved LD ... LD B,192
PUSH BC
PUSH HL
PUSH IX
LD ...display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... & transparent movement around the screen.
[code]
...
push bc
exx
pop bc
call GETATTR ... ret
FetchByte:
push bc
ld b,8
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... ]
LD HL,NN
PUSH HL
LD HL,NN ...
PUSH HL
LD HL,NN ...
PUSH HL
LD HL,NN ...
LD HL,NN
PUSH HL
...[/QUOTE]
screen buffer for example) are a "part ...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…
... sa_scr_str:
cp tk_screen_str ; SCREEN$ token?
jr nz, ... hl, 49152 ; point to alternate screen address
.endif
SCREEN$
jr sa_all ; ... pointer to program area
push bc ; stack length
...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…
... ; result in C
push bc ; stack count and result ( ... ld (hl), a ; store in buffer
and a ; zero?< ... (hl) ; get digit from buffer
inc hl ; next ... positive
push bc ; stack exponent
ld bc, 5 ; five ...IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... The caller passes a buffer pre-loaded with the first ... /> directory entries.
Buffer format:
Entry 0 ... )
DE = Address of buffer (first entry initialised)
HL ... = Number of completed entries in buffer, 0...n.
(If ...
