... , come up with a PASMO Macro that generates a 256-byte mirror table.[/QUOTE ... right place:[code]
REPT 256, x
defb ((x> ...

... ; hl = noptable on an exact 256 byte boundary
; bc = sample count ... must be at beginning of 256-byte page
defs LEVELS ; ...

noptable contains a table of NOP instructions into which ... see how to speed up the loop using cpd ...

... and ignoring the attributes -- one byte represents eight pixels with each ... and shifts it using a table look up before writing the data ... done by table lookup

; write A byte to screen ... back to remnant table
inc de ; next sprite byte

... anywhere near putting stuff up on the screen (I ... bit 7 in the next byte, and so.

up perfectly with the bits ... two solutions to speed it up:

1 - Use ...
2 - Use a table to look-up the result of calculating any ...

... -byte table of values coded in some way so that a single look-up ...

... 256 border)
lookupLSB: precalculate LSB of all answers (if previous table ... is in
a 256 border, ... will already be at 256 border)
[/code ... in successive 256-byte tables, aligned on a 256-byte boundary. ...

... the size of the relocation table (see [url]http://u6c87.blogspot ... can only be fixed up to a 256-byte boundary.

Note ... table (if eh_reloc_len != 0), followed by the code itself. The 49-byte ...

... setting H=0 and L=256 byte index but you are not ... to just one page of 256 bytes. You're a little ... was no longer a 4-byte "extend" opcode to introduce the ... for these other cpus will look quite different. The rabbit cpus ... would not have been taken up in 1975.

The quickest way is to use a pre-calculated 256-byte flip table aligned to a page boundary, like the one at [url="http://pyskool.ca/disassemblies/contact_sam_cruise/asm/32256.html"]32256[/url] in Contact Sam Cruise.

... , then using a lookup table method as follows, but ... z80 fast using a lookup table.

Scr_add ... br /> Create lookup table to 256 byte boundary (requires 256 bytes of free space ... ;17 bytes

256 byte table will look like this:

00 ...

... but saved another byte and speeded up the line incrementing a ... b,#XX 06XX ;Hi Byte of Lookup table 7
Scr_add ... c,a 4F ;find lookup table address 4
ld ... hl),a 77 ;copy flipped byte to lhs 7
... c,a 4F ;find lookup table address 4
ld ...

... /> [code]
//set up IM2
im2_Init(53248); ... br /> [code]
//set up IM2
im2_Init(0xd000);
[code]
//set up IM2
im2_Init(0xd000); < ... table and 3-byte JP instruction, the table must start on a 256-byte ...

... table has to be located at a multiple of 256 -- this shows up ... in hex as the lowest two hex digits = 00. The table ... by 256 to get the most significant byte.

The table ... itself contains all the same byte, ...

... 't see how a 128-byte table is going to work with ... look strangely familiar. x$(5)&(6) are keys into another table ... the hash key 'h'
[*]look up the 'h'th record in ... the range 1-102
[*]look up the 'k'th record in ...

... for STDIO_MSG_EATC
;
; set-up: hl = state machine function address ...
I quite often end up rewriting stuff because I didn ... look at this to see if it can do 256/512/1024 byte ... multiple buffers and only give up the least-recently-used ones ...

... put the sprites at 256 byte boundaries and just add the ... clarify is that the table will hold 4 frames ... counter cannot jump in 48 byte segments. (good idea ... br />
Having a table of pointers to your sprites ... frame, could just go up in steps of 48 instead ...

... if you have a jump table, you have to find ...
Now, if a jump table and JP (HL) is used ... used.
jumptable ; aligned to a 256 boundery
DEFW donothing ... is that the jump table is high-byte aligned. However, that restriction ...

... obv... Would need another byte or two for each tile ... although just an extra byte per tile can give 8 ... current form they'll take up too much roo. It' ... can be made to take up even less room. That ... I'd keep a separate 256 byte table that holds properties for each ...

... improvement is speeding up the computation of the next table index by ... within the table itself. This is a minor speed up, but if ... /> if (table/256)-((table+15)/256)
error "whole table must be within single 256 byte block ...

... somewhat faster version with table restricted to single 256 byte block:
< ... if (table/256)-((table+17)/256)
error "whole table must be within single 256 byte block ... be shaved off by particularly aligned table, but I guess that' ...

The table is typically aligned to a 256 byte boundary. Here, ... if let's say you have the high byte ... of the table address in B ... need to reverse the byte order, therefore step ... /> As for the mirror table, you can generate one ...

... your format is 'X(byte), Y(byte), Graphic(16-bit address)' then ... you don't need a table look-up to find your graphic - you ... (byte), Y(byte), Graphic-N(byte), in which case you do need a table ...

... ?view=markup"]ascii key translation table[/url]

For ... code is simply a mask byte in the top 8 bits ... use the ascii keyboard table above to look up scan codes that can ... br />
Look up scan code using the ascii translation table:
[url ...

... nirvana_halt inserted someplace to sync up. Inserting a conservative nirvana_halt at ... 's something to have a look at.

There ... to the top of this 256 byte page).

The zx7 ... of memory available. The last byte segment is AY music and ...

... /> I could dig up some conversations from these ...
You have to look up each disk system's manual ... assume it will show up in documentation if you ... systems are primitive, take up memory space, or integrate ... the printer buffer as 256-byte disk buffer. I don ...

... ;907684"]
You have to look up each disk system's manual ... and requires you to set up a basic command in a ... use the printer buffer as 256-byte disk buffer. I don't ... -dos manual, and it does look rather primitive. I can only ...

... place to stash boundary-aligned lookup tables for byte mirroring, shifting, etc ... take your byte in A, do an exx and look up the values ...

... a variable for each stored byte. Just label the beginning of ... of the code will then look like this:

[code ... address to a 256-byte boundary, you can speed up the code a ...

... shifted / rotated will take up 160 bytes each, as ... move on to next byte of tile graphics data
aligned with a 256 byte page boundary, as ... your tiles each took up 256 bytes that would leave ... but my tiles took up 160 bytes each when ...

Use a 256 byte, page aligned table that contains the mirror image of the relevant byte.