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multiple songs with savage enginesorry friends, another thread with my stupid questions. maybe wos should introduce a noob section for people like me? :oops: anyway, how does using …
... that is not on a 256 byte boundary (e.g. $8000, $8100 ... -
Timex Floppy Disk Drive emulation discussionI feel embarrassed for starting this topic because I can't contribute with actual code, but this is a new attempt to simplify and present what the Ti…
... 40 tracks, 1 head, 16 256-byte sectors per track numbered 0 ... disk labels, where the first byte is 0xFF.
On ... -
Timex Floppy Disk Drive emulation discussionI feel embarrassed for starting this topic because I can't contribute with actual code, but this is a new attempt to simplify and present what the Ti…
... 40 tracks, 1 head, 16 256-byte sectors per track numbered 0 ... -
Better or Worst! Speccy vs C64Just wanted to see what games you all thought looked better or played better on the Speccy or the C64? I always thought that Renegade & Target Ren…
... , which allows it to have 256 pseudo registers in the first ... instructions. Certain limitations like a 256 byte stack, 256 byte wrap on indexing, fastest ... -
Kobrahsoft DB1 - doesn't work?Hi, I've tried loading [URL="http://www.worldofspectrum.org/infoseek.cgi?regexp=^DB1$&pub=^Kobrahsoft$&loadpics=3"]DB1 by Kobrahsoft[/URL] into two …
... in ST1+ST2
[*]first byte of data field should be ... . The 9th sector is only 256 bytes, and also has a ... sector (512 bytes from the 256-byte data field). I've yet ... -
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?
... required
2: Invert the byte when needed
... call revByte with your victim byte in a & the ... a 256 byte table of reversed values
; hl = base of 256 byte table ... ; Make sure that the last byte is written
ret
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?
If anyone wants to be really smart, come up with a PASMO Macro that generates a 256-byte mirror table.
I can imagine resorting to Excel for that, myself.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?
... PASMO Macro that generates a 256-byte mirror table.[/QUOTE]
I ... right place:[code]
REPT 256, x
defb ((x> ...Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
... PEEK'd back. For all 256 byte values, chances are you'll ...playing sound samples from Boriel's zxbasic-compilerfirst of all, sorry if it sounds confusing if i'm posting this thread here instead instead of at Discussions:SinclarBasic it's because this is more …
... /> ; hl = noptable on an exact 256 byte boundary
; bc = sample count ... must be at beginning of 256-byte page
defs LEVELS ; (4 ...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 …
... for repetition for next sprite byte
[/code]
... The 'remnant table' takes a byte GGGGGGGG and returns GGG00000 (the ... The 'current table' takes a byte GGGGGGGG and returns 000GGGGG (the ... and are aligned to a 256-byte boundary then each table ...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…
... that $8700 is on a 256 byte boundary (not so easy with ... faster by placing data on 256 boundaries like that.
If you are writing a byte to the screen then you ...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…
... that $8700 is on a 256 byte boundary (not so easy with ... faster by placing data on 256 boundaries like that.
If you are writing a byte to the screen then you ...Routine for clearing screenI was looking for a 'nice' way of clearing a screen of graphics in Z80. After a ridiculous amount of time mucking around, this is the best and most …
... , I keep forgetting about the 256 byte boundaries...
The 2nd ...Playing SID music on AY??Hello. Some time ago, with occasion of another thread, I was asking about possibility of making a very certain thing - a SID emulator for Spectrum …
... zero-page to a different 256-byte page, the rest of it ...General purpose full screen input routineHi Folks, One of the things that annoyed me back in the 1980s with most BASICs was the lack of a full screen "formatted" input function. You could …
... then overwrites eight bytes in 256 byte steps from 22783 to 24575 ... I was using the 96-byte validation table idea, then at ...64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... 255*256+255 = 65535
;the next byte from 65535 is byte 0 ...
INCBIN
REPT 256
.BYTE 0
ENDR
INCBIN
REPT 256
.BYTE 0
ENDR
assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... answers (put this on a 256 border)
lookupLSB: ... is in
a 256 border, this will already be ... at 256 border)
[/code][/QUOTE ... MSB in successive 256-byte tables, aligned on a 256-byte boundary. Better ...Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
... the address of the first byte in each row can be ... to start it on a 256-byte boundary. Then you just load ... the high-byte of address of the start ... use it as the lower byte of the table address, then ... x-position to the low byte of the address you just ...BRAND NEW VTX 5000 MODEMSI have for disposal a number of BRAND NEW BOXED PRISM VTX 5000 Modems If tou would like to add one or more VTX 5000 modems to your Sinclair ZX Colle…
... Detection: Data is transferred in 256 Byte blocks.
EXOR checksum is ... turn sends back a status byte either
re-transmit or ...Converting UDG to 2x2I've got a udg that I want to display in different sizes. Obviously I just print it for normal size, I can use the udg in bin format to display it ea…
... doesn't need a 1024-byte data table after all, a ... 512-byte one will do - although it ... also tried it with a 256-byte table, but the 4th column ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... the exo_mapbasebits table on a 256 byte page boundary... I use the ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... ]
; Note: exo_mapbasebits must be 256 byte aligned
; exomizer raw -c ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... ]
; Note: exo_mapbasebits must be 256 byte aligned
; exomizer raw -c ...Optimisations in Exomizer Z80 decrunch codeThis is the 163 bytes old code (simple and optimized): [CODE] ld iy, exo_mapbasebits ld a, 128 ld b, 52 push de exo…
... :
so an extra 565 byte space have to be reserved ... /> Yes. The table must be 256 byte-aligned. HL and DE have ...Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... fit 10 characters into a 256 byte page instead of only 9 ...Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... fit 10 characters into a 256 byte page instead of only 9 ... UDG character at least one byte should be zero, or at ... be able to save 1 byte and at least 2 T ...Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... every character by one byte, or enough characters in ... fit one more in each 256-byte span. You might if ... deliberately just use 6 byte patterns in each character ... squeezing the characters into 256 byte sets is then you ... graphic and the low byte to refer to the ...
