-
IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... ;adjust to opcodes
ld (OPCODE),a
rst $20
call $2307
OPCODE nop
jp STAKA ;direct ... -
Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?
... ....[/QUOTE]
Yes. The opcode is for a JP Z ... . Doesn't found any better opcode to skip 2 bytes. Fortunetly ... -
Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?
[QUOTE=antoniovillena;571491]Yes. The opcode is for a JP Z. ... Doesn't found any better opcode to skip 2 bytes. Fortunetly ... -
AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... with their parameters. Basically, the opcode pointer for an action is ... /> ld b,c ;calc 2nd opcode for BIT n (uses AND ... /> RESSET: sla c ;calc 2nd opcode for RES,SET
sla ... -
Artist RequiredAs some of you may be aware, at the homebrew coding weekend back in July I volunteered to write a Spectrum game to be shown at this year's Replay exh…
I've got the loading screen, title/menu screen (and a Game Over screen, if required) covered. I'm stuck for more sprites at the moment, so we could call a halt on any new ones? -
Artist RequiredAs some of you may be aware, at the homebrew coding weekend back in July I volunteered to write a Spectrum game to be shown at this year's Replay exh…
... , so we could call a halt on any new ones?[/QUOTE ... -
Super Stick ManBeen thinking about doing a weird platformer for a while now, but since I have zero programming knowledge, and a modicum of drawing skills, I thought…
AGD 2.6 WoesThis was originally in the New Game Ideas section but thought this would be the best place to post this: I'm no programmer, hence i'm using the exce…
... on, then come to a halt at the other higher/lower ...Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …
... /> ld a,0
face_loop0 halt
push af
add ... tell you when.
face_loop0 halt
;when you know about ...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... will just get confused and HALT probably.
[i]Don ...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... fetching instructions. $FF is the opcode for RST $38, which pushes ...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... fetching instructions. $FF is the opcode for RST $38, which pushes ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... if you can use a HALT to wait for it.
HALT, that works like a lot ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... if you can use a HALT to wait for it.
HALT, that works like a lot ...SnowThat's Airdrie had its first snowfall of the winter. I woke up this morning and there was a dusting on the rooftops, only roughly half a centimetre …
... my way to a complete halt, and I like to be ...SnowThat's Airdrie had its first snowfall of the winter. I woke up this morning and there was a dusting on the rooftops, only roughly half a centimetre …
... my way to a complete halt, and I like to be ...SnowThat's Airdrie had its first snowfall of the winter. I woke up this morning and there was a dusting on the rooftops, only roughly half a centimetre …
... my way to a complete halt, and I like to be ...BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…
... (254),a ;green border
halt ;intricate beam tracking & timing ... (254),a ;black border
halt
jr loop3[/CODE]
BackgroundDoes anyone know how i would create a background similar to [URL=http://imageshack.us/photo/my-images/42/backgroundmockup.png/][IMG]http://img42.ima…
If you do: loop3 xor 4 /out (254),a/ halt/ jr loop3 your routine becames shorterWriting an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... under any circumstances write every opcode by hand. Write something to ...Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... under any circumstances write every opcode by hand.[/QUOTE]
That ...Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
Z80 has three opcode sets (768 opcodes already) plus ... two modifiers for the first opcode table that replace HL with ... takes place inside of an opcode. With 2600 it starts to ...Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... =Shiru;588122]Z80 has three opcode sets (768 opcodes already) plus ... two modifiers for the first opcode table that replace HL with ...Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... under any circumstances write every opcode by hand. Write something to ... ]
I wrote every opcode by hand for a couple ...Arkanoid - Hit Squad ReleaseInfoseek (and the [URL="ftp://ftp.worldofspectrum.org/pub/sinclair/games/a/Arkanoid(TheHitSquad).tzx.zip"]TZX[/URL] itself) identifies the Hit Squad …
... ]
Searching for the opcode [B]LD IY,$0000[/B ...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 …
... value
cp $f9 ; correct opcode?
jr nz,chksp2 ; no ... value
cp $f9 ; correct opcode?
jr nz,dcret ; no ... ),$c9 ; and insert a ret opcode
rundc call dcbuff ; run ...
ld a,$f3 ; di opcode
cpir ; and search...
