... relocating code/data on 256 byte boundaries, but messing with ... bytes.

For relocatable code, you need to ... 256 byte blocks.

The load would be simplified if a table ... to the current destination address for that block.
When ...

... not necessarily the case. For example, there are no ... if libraries were distributed for linking assemblers as these ... are some restrictions on table locations due to 256-byte alignment.
< ... limited amount of time available for the spectrum.

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.

... the 257 byte vector table:
ld hl,48640 ; 190*256
... code for 'JP nn'
ld (48573),a ; 189*256 + 189 ... This builds its own vector table and the interrupt routine ... of things to watch out for.

First off ... of the gaps for other data.

... logic that I'm implementing for various in-game behaviours and ... be a fair number of sprite objects that need redrawing from ... 128K machine to hold data for AY music/sound effects and ... 've currently got my 257 byte vector table at $FB00-$FC00 with ...

... I decided to "waste" 256 bytes for a column. This way I ... INC H to go one byte right

It's ... ways:
- have small buffers for sprite backgrounds and capture background when ... of location but not from sprite buffer but from location data

... to define a variable for each stored byte. Just label the beginning ... /> If you align the buffer address to a 256-byte boundary, you can ...

... you can shave off one byte in each loop by eliminating ... /> (The same is true for the mask: use 16 instead of 32 ... .)
The loop will execute 256 ... times if A is zero (that is, for either ...

... byte 'I' of the interrupt address, and that points to a table ... . The low byte will be ... table (remember you're only setting the high byte) ... 256 + 253) which is just enough room below that very table for ... combines with the first byte of ROM to ...

... modulus of the frame counter for 2, 4, 8, even ... is always around the player sprite.

[quote]
... tap?dl=0"]Tumult[/url] for example, if you have ... This WIP demo is set for max difficulty (and you can ... etc) to new orgs on 256-byte boundaries too.

... displacement for width
; HL = sprite address, DE = mask address
; C = sprite pixheight ... ; C = zoomed sprite byte

ld a, (de) ; mask byte
cpl ; xor ...

... mirroring the data in-place for performance reasons (it may be ... still be using a lookup table to actually mirror the requisite ... get away with just a 256 byte table for the flip and that seems ...

At the end I went for the table solution, but not a ... special index for 1 byte instructions to which all 1 byte instructions I ... , and the same for 2, 3, and 4 byte instructions.
... prefixed opcodes to 256 byte page and use this table to convert instruction ...

... tbl_scraddr be aligned to a 256 byte boundary
adc h ; A ... up screen address from the table
ld a, (hl)
for this may come later ;)
for this may come later ;)

... tbl_scraddr be aligned to a 256 byte boundary
adc h ; A ... up screen address from the table
ld a, (hl)
for this may come later ;)

... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... won't overflow. Reasons for this may come later ... won't overflow. Reasons for this may come later ... won't overflow. Reasons for this may come later ...

... br /> ALIGN 256
; screen address table. This must be 256 byte aligned

ALIGN 256
gfx16x16_player0 db %01111110, %00000000 ... 00000001, %11111110

ALIGN 256
; line type, operation, ...

... tbl_scraddr be aligned to a 256 byte boundary
adc h ... up screen address from the table
ld a, ... won't overflow. Reasons for this may come later ... won't overflow. Reasons for this may come later ... won't overflow. Reasons for this may come later ...

... of the pool. "Byte to use for next one" should be ... 'll stick the loader for the game into the ... it was only designed for my use!!). It'll ... out.

"XLR8MASTER" - "Mask colour" is the border colour ... the game encrypter, wait for a keypress then save the ...

Dear All,

Anybody knows where can I find an Ascii Table for the zx?

I would like to know which charcaters are for example like carriage return
(10?)

Thanks in advance.

Devwebcl

... a cross-platform development environment for the Spectrum:
[URL="http ... to get round the 256-colour mode requirement) for running the output ... [/I] without having to reach for the keyboard.

... myself to a bespoke arcade table for my 40th.

[url ...

... minutes ago, ZX BASIC for the first time properly ... keywords can be used for I/O, using that ... (a whole packet just for each byte!) and very slow, ... - each stream has a 256 byte buffer in a page of ... />
The twitter client for ZX BASIC moves ever closer . . ...

... does something different for each byte from 0 to 256. There's a ... HL (H is for High byte, L is for Low byte)
Any machine ... br /> The instruction byte for ld is different for each register or register ... is loaded.
The instruction byte for ld bc is 1. The ...

... experience with shifting sprites by table ? some neat tricks ? i don ... heard much about using tables for shifting but it looks to ... />
[code]
rr e ;for sprite width 3 bytes
rr ...

... while building the ultimate image for +3e, it's currently at ... been converting the russian demos for ages now. I fix all ... 'm using a full 257 byte IM2 table, so it's not ... the only interupt setting is for the snapshot loader...

... possibly be more appropriate for me to post this ... Outputted: Gfx
;Interleave: Sprite
;Mask: Yes, before graphic
... such that it checks for failure of malloc() like ... br /> [/code]

Thanks for any possible info as to ...

... First I'm generating a table of screenaddresses. I [URL ... that generates a 512 byte table (128 bytes of it ... on the start of a 256 byte page.

...
ld h,SCRTABLE/256
add a,(hl)< ... 512 bytes on a table might earn me a ...