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I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…
... relocating you separately load relocation table and binary. Reserve space ... Start your walk through relocation table. First entry is at ... , use stack to jump, 256-byte boundary allocations, etc...) are ... to program - release relocation table (no need for it ... -
I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…
... HL, use stack to jump, 256-byte boundary allocations, etc...) are used ... jumping to program - release relocation table (no need for it anymore ... statements there will be a table of defw that will change ... work in all cases except 256-byte aligned unless you keep ... -
I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…
... relocating code/data on 256 byte boundaries, but messing with ... certain alignments within a 256 byte block, the linker has ... 256 byte blocks.
The load would be simplified if a table ... the high address byte from the block address table.
New Game - Pietro Bros [z88dk/Nirvana+][b]PIETRO BROS[/b] Pietro and Luizo were transported to pipe world after eating some rancid mushrooms on his pizza. Help them to escape from th…
... /> rst 0 ; if tape loading error
[/code]
... file. There is only 256 bytes available here, including ... to the top of this 256 byte page).
The ... memory available. The last byte segment is AY music and ...ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…
... required some tables to be 256-byte aligned.
* sp1 can ... are some restrictions on table locations due to 256-byte alignment.
HELP!I'm trying to replace a bit in a byte as follows, but having some sort of brain freeze trying to get it to do what I want. A=00 if bit to replace …
And if you align your sprite data (i.e. make sure it doesn’t cross the 256-byte boundary), you can use INC L instead of INC HL, which is two T states faster.Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…
... the 257 byte vector table:
ld hl,48640 ; 190*256
... /> This builds its own vector table and the interrupt routine cycles ... make sure that your interrupt table and routine sits between ... />
The whole vector-table thing does leave gaps and ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... a variable for each stored byte. Just label the beginning of ... /> If you align the buffer address to a 256-byte boundary, you can ...im looking for other games like the muncher that use double height and width graphics with colouri havent come across this type of graphics mode on the spectrum before and would like to know if there are any other games that use it.
... still be using a lookup table to actually mirror the requisite ... get away with just a 256 byte table for the flip and that ...im looking for other games like the muncher that use double height and width graphics with colouri havent come across this type of graphics mode on the spectrum before and would like to know if there are any other games that use it.
... with just a 256 byte table for the flip ... but is smaller than regular 256 bytes table + code
table can be much smaller - ... br />
; ------------------
; byte mirroring
; ------------------
DUP 8 ...Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
Use a 256 byte, page aligned table that contains the mirror image of the relevant byte.Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
... ="AndyC;973416"]Use a 256 byte, page aligned table that contains the mirror ... image of the relevant byte.[/ ... build the table.
To get the mirrored byte in ' ... and 'inc h' to my table. Or something like that.
Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... end I went for the table solution, but not a ... handler table but an index table. As I'm ... special index for 1 byte instructions to which all ... for 2, 3, and 4 byte instructions.
That ... opcodes to 256 byte page and use this table to convert ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ; A ... up screen address from the table
ld a, (hl)
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ; A ... up screen address from the table
ld a, (hl)
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ; A ... /> ld l, b
; push table address
push hl
table
ld a, (hl)
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
Which version of sprite8x8a are you using?
The data needs to be align 8 as well since it assumes the data does not cross a 256 byte boundary.How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... code uses a 192x2 byte lookup table to get the ... one used a 24x2 byte lookup table to get the ... yet. The 192 entry table for the screen address lookup ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... code uses a 192x2 byte lookup table to get the ... one used a 24x2 byte lookup table to get the ... yet. The 192 entry table for the screen address lookup ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... up screen address from the table
ld a, ... up screen address from the table
ld a, ... up screen address from the table
ld a, ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... up screen address from the table
ld a, ... up screen address from the table
ld a, ... up screen address from the table
ld a, ...So what about ethernet and ZX BASIC?Well, as of about 5 minutes ago, ZX BASIC for the first time properly wrote some packets to the network! OK, so it isn't perhaps 100% what Andrew Ow…
... />
Spectrum streams work a byte at a time, which would ... whole packet just for each byte!) and very slow, so under ... on - each stream has a 256 byte buffer in a page of ...IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…
... 'm using a full 257 byte IM2 table, so it's not ...Spectrum Screen RAM layoutHi there The spectrum screen layout is rather odd. It seems to be arranged into 3 256 byte groups. If I have an x (horizontal) coordinate (from…
... to be arranged into 3 256 byte groups.
If I ...Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …
... you must fill a table of 257 adresses with ... (0-255), hence the table of 257!!! values. If ... is how to make a table:
. LD ... I,A ; point to high byte of table.
. IM 2 ; ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... at the end of a 256-byte boundary (both Spectrum screens are ...i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... if adress pointer is crossing 256 byte page and you must use ...Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... routine, look up in a table. The note will range from ... need a 2*296=592 byte period table, assuming 2 bytes per ... /> You'd construct a 592-byte table using this formula, and using ... each note + finetune possibility. This table is available in one of ...Basic corruptionDoes anyone have any tips or solutions for when a Basic listing becomes over a certain size and starts to get corrupted due to paging... I remember …
... is attached) then a random 256-byte page of memory will be ...
