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TZX format updateHi folks. Following the private communication with Andy I would like to start a discussion on changing the TZX format to reflect new needs and improv…
... , and SYNC is the syncronicity byte ?
I'm learning ... -
TZX format updateHi folks. Following the private communication with Andy I would like to start a discussion on changing the TZX format to reflect new needs and improv…
... say that the flag or parity have this or that value ... -
42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…
... a whole load of 0 byte data blocks. Taper reports also ... -
Chuckie EggHi peeps, a long time ago I wrote the original version of chuckie egg on the speccy. I've just heard about this board and was told I should say hello…
... m/c into memory one byte at a time. Then you ... -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... . Your program uses a single byte or integer to identify which ... -
Platform vs BackgroundForgive my ignorance if this is a 'stoopid' question, but although I've written games for many platforms over the years I'm only now making my first …
... cover the entire display. Each byte stores relevant background information like ... -
42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…
... a whole load of 0 byte data blocks. Taper reports also ... -
whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…
... takes 12.25 cycles per byte to perform the copy and ... .5 bytes of code per byte copied. Oddly enough, inserting "push ... /2048 = 9.77 cycles per byte?
So a ratio ... 1.253MHz z80 for the byte copy task, or the spec ... -
whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…
... /2048 = 9.77 cycles per byte?[/quote]
About 8 ... [/I] unrolled (two commands per byte) and there's no other ... 1.253MHz z80 for the byte copy task, or the spec ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... HL is pointing to a byte, INC H takes you down ... times before we reach the byte we're using for the ... character squares for the next byte.
Therefore the Speccy ... -
Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??
... position is in the high byte of the 16bit address if ... the segment part of the byte - moving you 64 rows down ... -
help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
need a Table of 256 bytes stored on a 256byte boundary
on entry: a=byte to mirror
FlipByte:
ld h,TableAdress/256
ld l,a
ld a,(hl)
ret -
Making a mapI should learn Z80 assembly, but I don't have the time (really busy) and I feel like making a game. I've tried with Colt which gives me enough speed…
... just PEEK and POKE each byte in each tile instead of ... -
Making a mapI should learn Z80 assembly, but I don't have the time (really busy) and I feel like making a game. I've tried with Colt which gives me enough speed…
... , each one with its attributes byte.
4.- Also, I ... -
help in byte mirroring.I need some help. What is the best way to mirror the byte? (for ex. 10010011 -> 11001001) I mean, if there is a simple way to do it (may be with OR, …
cyborg: thanx to your suggestion of using table method, I've managed to make a fast byte shifting using almost the same idea. table is 4096 bytes long, but the speed is great. -
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…
... tables, I think translating a byte to the appropriate AY output ... -
How to program Machine Code on a PC, and then run it on a speccy?Well, I've been looking into MC a bit more deeply recently - I reckon I could get my head round MC now. Back when I was a teenager, I couldn't see th…
... gfx directly to asm via .BYTE directive
RealSpectrum or ... -
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…
... about a matrix of 8-byte entries. (Maybe I need to ... -
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…
... about a matrix of 8-byte entries. (Maybe I need to ... -
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…
Yep that worked a lot better. SPIN's AY output is linear it appears (Yerz suggested hi/low byte split works here). -
Why Hex in place of Denary?Ok - most MC books / tutorials advocate the use of hex instead of denary. But the Speccy doesn't actually have a Hex converter so you need to write …
... with individual bits in a byte; it is easier to split ... the byte down into two lots of ... -
Why Hex in place of Denary?Ok - most MC books / tutorials advocate the use of hex instead of denary. But the Speccy doesn't actually have a Hex converter so you need to write …
Ah - yes I see that now, no wonder I was getting confused.
I have also remembered that I can PRINT PEEK to examine the contents of a byte too.
I'll get there in the end!
Cheers
Jon -
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
...
; start of a 256-byte page (this
; means its ... the example above, sz=1 byte so no multiplication was necessary ... -
EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…
... muck about with the attribute byte to fix certain things. For ... -
EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…
... sparite itself (in each odd byte e.g.)
[+] GFX Sprite ... -
T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... LDI as it takes 16t/byte
ld (...),sp
byte moved but u need only ... 13 t for a byte
16*2048=32768 ... -
T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …
... LDI as it takes 16t/byte
ld (...),sp
byte moved but u need only ... 13 t for a byte
[/quote]
Been ... takes 12.5 T per byte but, as you say, ... worthwhile to consider a 30 byte wide x 96 vertical pixel ...
