-
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…
... Off course the screen memory was an ... ld bc, 200
ldir
LD (24198), SP ;save stack
LD SP ... , 24197 ;move stack
ld hl, 0
ld ... -
RCS (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 RCS format to regular screen, like the Einar code at ... , e ; de= i, hl= j, bc= k
ld h, d ; j= i ... /> call func
sbc hl, bc
add hl, bc
call c, $1f20 ... -
RCS (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…
... screen format HL = "x0x1x0R1R2p1p2p3 r1r2r3c1c2c3c4c5"
step2: ld a ... hl
pop ix ; last= j
push de
ex de, hl ... /> sbc hl, bc
add hl, bc
... -
RCS (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…
... 1/3 or 2/3 screen, so I still prefer your ... , e ; de= i, hl= j, bc= k
ld h, d ; j= i ... /> call func
sbc hl, bc
add hl, bc
call c, $1f20 ... -
RCS (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…
... address
push de
ld bc, $fc03
... /> ; Recover initial address
pop de
; Second ... to regular screen format HL = x0x1x0R1R2p1p2p3 r1r2r3c1c2c3c4c5
step2:
ld a, ... -
RCS (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…
... )
push de
ld bc, 0
ld d, b
length_size_loop ... /> add hl, de
ex de, hl
pop hl
ofdone: ex (sp), hl ; store ... -
RCS (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…
89 bytes (-1 byte):
C cruncher code:
[CODE]
#define MAX_OFFSET 2160 /* range 1..2160 */
...
void write_elias_gamma(int value) {
int bits= 0, rvalue= 0;
while ( value>1 )
++bits,
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…
... for a key when the screen is full. If you're ... /> pop hl
and a
sbc hl,bc ;HL=bytes# in (VALUE) block
ld ...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 ...
LD HL,00128
CALL 00319
LD A,16
POP BC
DI
LD ( 23388 ),A ...Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... : push bc
e5fb: push de
e5fc: push hl
e5fd: ld sp ...Hacking a game MAJIKAZOHello, I am trying to put a recent game called MAJIKAZO on disk. However, the loader is written for tape only, so I have to find a way how to rewrit…
... screen
di
ld sp,0
call 33022
ld hl,33045
ld ... 32850
ld hl,34380
ld de,22528
ld bc,768
ei ... 65024
ld hl,l32821
ld de,65024
ld bc,29
ldir ...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…
... LD hl,$57e0 ;HL=start of last pixrow on screen
ld ... pop af
dec a
jp nz,LOOP23
ld bc ... ,32
sbc hl,bc
ex de,hl ;move ...Hacking a game MAJIKAZOHello, I am trying to put a recent game called MAJIKAZO on disk. However, the loader is written for tape only, so I have to find a way how to rewrit…
... screen
di
ld sp,0
call 33022
ld hl,33045
ld ... 32850
ld hl,34380
ld de,22528
ld bc,768
ei ... 65024
ld hl,l32821
ld de,65024
ld bc,29
ldir ...More tea, vicar on disk?Hello, can somebody help me putting the 128k version of this game on disk? The 128k version is free available from Jonathans Webseite. However, the g…
... free printer buffer)
ld sp,23999
ld bc,$7ffd
ld a,$11 ... select bank1
ld hl,bank1
ld de,49152
...
ld hl,move
ld de,moveto
ld bc,bank1-move ... br />
move: ld hl,bank0
ld de,24000
call ...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).…
...
ld bc,0 ; repeat 65536 times
ld hl,$3141 ; initial ... /> add hl,hl
jr nc, done_lfsr
ld a,l ... br /> xor $2d
ld l,a
done_lfsr:
dec hl ; alter lfsr range to include ...20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
...
LD SP,nn ; reference AF/AF' values
; 15994T
POP AF ... /> LD HL',nn
; 17572T
LD DE',nn
; 17582T
LD BC',nn ...20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
...
LD SP,nn ; reference AF/AF' values
; 15994T
POP AF ... /> ; 17506T
LD BC,nn
; 17516T
LD (nn),HL ; columns 19 and ...20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... LD SP,nn ; reference AF/AF' values
; 16051T
POP ... /> LD BC,nn ; (*)
; 16999T
LD SP,nn ... LD HL,nn
; 17811T
LD (nn),HL ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... br /> pop bc ; fetch data length from stack
ld a,b ... indicates load error
pop hl ;remove the data length ... load a screen
ld ix,16384
ld de,6912< ...Confounded DEF FNCan anyone see why this is going wrong? I've been tinkering with it since tea time and got nowhere. [code] 2 DEF FN t$(n,t,d) =STR$ INT (n/t)…
... /> pop bc ;BC=$3365
pop de ;DE=$0000
inc sp
inc sp
pop hl ;HL ...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…
... the structure inherent to a screen, and hence the loading ... ;; compressed length in BC
.rldecode_loop:
ld a,(hl) ; read this ... until run is complete
pop bc ; restore byte counter
...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…
... /> ld b,0x18 ; BC = 0x1800, 6144
ld hl,.block1 ... block 1
pop hl ; 16384
ld de,24300
;; GO!
ld sp,24300
jp 32768< ...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 …
... /> // Puts a 8x8 character on screen
// uses char_data array defined ... /> pop bc ; c = tilenr
push hl
ld l, c
ld h ...RCS (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…
... HL holds the source address for the stored RCS'd screen
ld de,$4000
... hl
add hl,bc
ldi
inc bc
pop hl
inc hl
ld ...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…
... original posted flip screen with attributes routine. Moved LD DE,32 and ... />
POP IX
POP HL
INC IX
DEC HL
POP BC
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…
... movement around the screen.
[code]
GETATTR:ld de,$5800 ... graphic in MEMBOT
ld hl,23698 ;HL=MEMBOT
pop bc
jr PRINTAA ...LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
... BC, DE or HL.
unlz4:
ld ... ex (sp),hl ; switch destination pointer into HL
push hl ; save ... ldir ; copy bytes
pop hl ; restore source pointer
...
