-
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…
... channel type 'P'
pop hl ; allocated address plus ... br />
push hl ; save AT_COL address ... ; Main loop to copy 8 font bytes into ... :
pop hl ; restore AT_COL address ... -
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…
... below BASIC area
push bc
call 0x1655 ... pop bc
ld hl, CH_DATA + 4
lddr ; copy ... DRIVER
push hl ; save AT_COL address ... -
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…
... below BASIC area
push bc
call 0x1655 ... pop bc
ld hl, CH_DATA + 4
lddr ; copy ... DRIVER
push hl ; save AT_COL address ... -
Casstte 50 compilation emulator game questionHi - Hope this is the right place to put this question? Wasn't sure? But I have just downloaded the 'Cassette 50' compilation from wos but can't w…
... program header
POP IX
PUSH IX
LD ... ,BC
PUSH HL
POP DE
PUSH DE
... SBC HL,BC
LDIR ;copy ... -
BUZZSAW+ Demo No. 3Right, another demo of BUZZSAW+. [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_3.tap"]Joefish_Buzzsaw_Demo_3.tap[/URL] The default con…
... the timing works on a POP/PUSH copied rainbow generator instead of ... decide if it should be fast and use 4x1 coloured pixel ... -
INSTR function...Hi Folks, Another little program that people might find useful: [CODE]100 DIM i(4) 110 LET a$="This is some sample text" 120 LET b$="text" 130 GO S…
... /> 5b3f edb1 CPIR ; fast search inside t$
PUSH BC
5b43 d5 PUSH DE
5b44 e5 PUSH ... 5b5c d1 POP DE
5b5d c1 POP BC < ... -
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…
... part...
[CODE]tile_line_loop push hl ; Store HL before calculating ... ]scroll_loop pop de ; POP next destination address 10
pop hl ; POP source address ... that bit of code as fast as it can possibly be ... -
FN nesting error?While playing with FN functions that call assembly, I've found something weird. Check out this code: [code]10 DEF FN f(a,b)=a+b 20 PRINT FN f(FN f(…
... advances HL past '('
PUSH HL ; save start address in ... space:
[code] POP HL ; pop the start address in DEF ... from stack.
LDIR ; copy value into DEF FN statement ... -
tiny routine to shift RAMTOP & stackCompressing some data areas above RAMTOP and wanting to make the released space available for BASIC arrays, I needed to move RAMTOP without using CLE…
... , L_7539 ; 32 244
PUSH HL ; 229
SBC HL ...
LDDR ; 237 184 ;copy old GOSUB stack
INC ... br /> POP BC ; 193
LD SP, HL ; 249
PUSH BC ... -
tiny routine to shift RAMTOP & stackCompressing some data areas above RAMTOP and wanting to make the released space available for BASIC arrays, I needed to move RAMTOP without using CLE…
... , NEXT_3 ; 32 244
PUSH HL ; 229
SBC HL ...
LDDR ; 237 184 ;copy old GOSUB stack
INC ... br /> POP BC ; 193
LD SP, HL ; 249
PUSH BC ... -
Arkanoid Hack - Your Sinclair Smash TipsRemember that Arkanoid hack in YS Smash Tips that didn't work? It does now... [CODE] 10 REM ARKANOID HACK 20 CLEAR 65535: LET C=1: LET D=23295 …
... push hl ; preserve decrypter address
ld de,dcbuff ; copy ... run the decrypter
pop hl ; restore decrypter address ...
pop bc ; restore decrypter length< ... decrypter address
pop bc ; restore decryption ... -
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 …
... side
LINE to COPY - space both sides
push af
call FETCHS
pop af
push hl
SSNEXT1:pop hl
... SSNEXT2:ld a,(de)
push af
and $7f ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... pointer into your data and POP to all four register pairs ... a row of data and PUSH it all to write to ... work was to draw or copy the scenery just behind the ... -
Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... pointer into your data and POP to all four register pairs ... a row of data and PUSH it all to write to ... work was to draw or copy the scenery just behind the ... -
Creating a new game - AssemblySo... finally I?m studying Assembly Z80... after 36 years. :) Well... it?s sooooooooooooo hard to make a game using Assembly? I bought a book (Spectr…
... .
(1) Using PUSH and POP to copy data around in memory ... -
Pixelwise scrolling sideways - how many ways to do it?Not that I need to, but I've been wondering if there's a good way to do this that I haven't considered. Scrolling [B]pixelwise [/B]vertically is "ea…
... periodically copy to the main screen, but that's not fast.
PUSH loop with the various PUSH statements (up to ... tile). It's a very fast way of rendering the scenery ... -
Fairlight's use of LDIRYS, comparing Fairlight and Nightshade, said: [quote]Fairlight is much more interesting even though the techniques that Bo Jangeborg uses for screen…
... actualize the SP register for PUSH and for POPs, for the ... the fastest possible method to copy your 160x160 pixel block.
fast. -
Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…
*waits for someone to suggest an unrolled POP/PUSH list to do it 20% faster but take up more memory than the data it's trying to copy* :roll: :lol: -
Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…
... someone to suggest an unrolled POP/PUSH list to do it 20 ... data it's trying to copy* :roll: :lol:[/QUOTE]
push bc ; 11
push de ; 11
push af ; 11 ... -
Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…
[QUOTE=joefish;595817]*waits for someone to suggest an unrolled POP/PUSH list to do it 20% faster but take up more memory than the data it's trying to copy* :roll: :lol:[/QUOTE]
You shouldn't joke about such things... -
Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…
[QUOTE=joefish;595817]*waits for someone to suggest an unrolled POP/PUSH list to do it 20% faster but take up more memory than the data it's trying to copy* :roll: :lol:[/QUOTE]
Chev doesn't post on WoS anymore :lol:
;-) -
Pixelwise scrolling sideways - how many ways to do it?Not that I need to, but I've been wondering if there's a good way to do this that I haven't considered. Scrolling [B]pixelwise [/B]vertically is "ea…
... few tiles and can use POP/PUSH, the former takes the lead ... , you need big sprites and fast movement. But at 50Hz the ... -
Pixelwise scrolling sideways - how many ways to do it?Not that I need to, but I've been wondering if there's a good way to do this that I haven't considered. Scrolling [B]pixelwise [/B]vertically is "ea…
... few tiles and can use POP/PUSH, the former takes the lead ... lines below are done using PUSH since they're just a ... , you need big sprites and fast movement. But at 50Hz the ... parallax is also drawn using PUSH but only scrolled every other ... -
LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…
... time, reset the counter and copy the counter to other address ... ]PUSH HL
LD HL,$0000
LD ($5C78),HL
POP ... HL
HALT
CALL compress
PUSH HL
POP HL
RET[/CODE]
Exilei\'m sure this has been brought up before but couldn't find a thread in 'New Game Ideas'. Why did the Spectrum never get a port of the BBC game Exile…
... it to screen using the POP/PUSH method can be done in ... -pixel and very smooth and fast with 16-way scrolling, but ...Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…
... as fast as a NOP -- much faster than a push (11T) and pop ... register, which is also as fast as EX AF,AF'. As ...BUG in zxspin and SpecEmu - read Loading speed in WAV fileI'm created a new save, but it can run at 44.1 KHz, to test it, i make a new file from WAV 44.1 KHz to 88.2 KHz. Load this file in a emulator zx-spin…
... /> LD HL,$4000
otra_onda PUSH HL
LD B,$01 ... L
DJNZ mas_muestras
POP HL
INC H
Copy line2 more than 1 times ...Still looking for a LMT Computers SPD1 Spectrum Disc ControllerHi All, Looking for a LMT Computers SPD1 Spectrum Disc Controller or possible contacts for ex LMT Computers employees. I worked there writing the co…
... />
Commands like "* COPY A: B:" would copy disk A to disk ... could make a quick start copy of a game whilst the ... /> Oh those were the days... POP this , PUSH that, ADD HL, DEC ... the delays on the disk copy code... disk drive sounded like ...Shadow registers.I assume it's faster to transfer the registers to the shadow registers rather than using the stack? Let's say that I want to temporarily preserve the…
... ;613800]So, a safe and fast way to do it would ... may even succumb to a push/exx/pop to communicate the data ...
