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AY DetectionOff the top of their heads, does anyone know how Exolon detects that an AY chip is present? Reading and writing from the PSG registers seems to work…
... /> However, it did occur to me that the 1982 48K rom ... that or some other subtle byte change - the keypad code for ... if it is a rom byte detection issue.
Incidentally ... -
DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…
... just skipping over a new byte in the data stream - not ... ). However, you've just given me an idea for how to ... . There's even a spare byte in the 'end of frame ... -
DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…
... ]However, you've just given me an idea for how to ... . There's even a spare byte in the 'end of frame ... -
Legend of Kyrandia - ZX Spectrum DemoI was browsing the ZX Open Source site [url]http://opensourcezx.untergrund.net/[/url] and I found an interesting tr-dos disk image of a playable demo…
... not enough.
Let me try to explain the design ... PAPER priorities would require 1 byte each. In this case, an ... be stored in a single byte, thus requiring 768+8=776 ... -
Krakatoa not workingI can't get any of the Krakatoa files in the archive to load on spin or zxds. Anyone else had this problem?
... perhaps pulses amounting to 1 byte worth of false data ? Maybe ... cos it worked better for me than 44100Hz.
In ... -
changing extended RAM pages in SpinIs it possible to edit the data in 128k extended RAM pages in Spin? I've tried both the debugger tool and the pokes tool and, although they let me ma…
Thanks. That never occurred to me, but it works. I'll ... if I just enter the byte values which I want to ... -
Krakatoa not workingI can't get any of the Krakatoa files in the archive to load on spin or zxds. Anyone else had this problem?
... have kraka with the two byte alteration? is this against the ... 'd want to represent two byte alternation ? If you can do ... . This level is usually beyond me, we'd need Patrik or ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... afraid it'll still take me at least a few days ... the whole point: because upper byte doesn't matter (I think ... well (different values of high byte identify different half rows of ... -
Newbie's development thoughts.Just wanted to thank WOS development forum regulars, for the amazing information etc contained within these pages. 20+ years ago a did a little asse…
... the data + mask in the byte order I want).
me put together the stages.
me tweak settings regarding speed - and ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... ready. Funny it took me so long to finish ... again raw descriptions leave me with a few questions ... really important? Some other byte informs about Spectrum issue ( ... here as two different byte orders appear in one ... br /> 6. Can you give me a few titles of games ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... />
[QUOTE]
Some other byte informs about Spectrum issue (whether ... 'm puzzled by inconsistencies in byte order. First of two bytes ... importance here as two different byte orders appear in one file ... ]
6. Can you give me a few titles of games ... -
machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…
... /> So, can someone please show me what I'm missing?
byte code block. I just don ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... - crashed soon enough to provide me with some valuable info. Again ... operand should be located one byte further. In this case "one ... byte further" is supposed to mean ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... been replaced by a 2 byte field that tells you the ... />
[quote]
2. Tell me, in a few words, how ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... with the same 30 byte header as version 1 ... and 5 of the flag byte have no meaning anymore, ... and the program counter (byte 6 and 7) is zero ... />
Could you point me to the .z80 format documentation ...
[quote]Could you provide me with a .z80 file which ... -
Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... the accumulator but saves one byte and is faster. But seeing ... , not 7.[/QUOTE]
OOps, me be bad again, lol
Artist RequiredAs some of you may be aware, at the homebrew coding weekend back in July I volunteered to write a Spectrum game to be shown at this year's Replay exh…
... but the kitchen sink! Let me know details and i'll ... dressed as storm troopers at Byte Back, so perhaps they might ...checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…
... a byte-file separate from basic program.[/QUOTE] It took me years ...Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…
... URS command and it hit me that if I want the ... simple operations like copy one byte from one place to another ...writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... are so that the last byte in RAM can be poked ... consequences. I suppose saving one byte and four cycles in said ... to admit it does annoy me more than it should since ...Structure of numeric arraysHi all, I have saved from my spectrum a numeric array using 'SAVE "array" DATA a()'. I now have the resulting file on my PC and I am trying to get …
... the spectrum stores the exponent byte and 4 mantissa bytes and ... all a bit confusing for me. I guess what I am ... that the first bit of byte 2 is the sign (0 ... =negative) and the remainder of byte 2, and bytes 3 to ...Structure of numeric arraysHi all, I have saved from my spectrum a numeric array using 'SAVE "array" DATA a()'. I now have the resulting file on my PC and I am trying to get …
... the floating point thats giving me a headache![/QUOTE]
byte value into a fixed point ...Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…
... ;564533]The 'XX' represents a byte of data. So if the ... -bit number, with the low byte first. The fiddly ones are ... /IY offset instructions, where the byte is treated as a signed ... for clearing that up for me [img]http://www.worldofspectrum.org ...Where to start?..Hello, First off, sorry if this is in the wrong and sorry if the questions I'm about to ask have been asked and answered numerous time! Little back…
... /> The 'XX' represents a byte of data. So if the ... number, with the low byte first. The fiddly ones ... offset instructions, where the byte is treated as a signed ... that one actually helped me to understand that the ... Thanks guys, youse is learning me good today!TZX format rev. 1.21Once 1.20 draft seems to be official now I would like to suggest some additiones to do on 1.21. I hope it will be easier to upgrade once block 19 has…
... 't start, it gives me a warning about some directx ... Description
0x00 - BYTE Text identification byte:
[INDENT][INDENT][INDENT ... ][/INDENT]
0x01 L BYTE Length of text string
byte between 08 and FF ...Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... keys should have been saved, (/me hopes)
ld bc,key_up_port ... hl ; point to the key_xxx_pattern byte
ld (hl),a ; ... ; go back to the key_xxx_port byte
ld a,(de) ; ... ; not executed, but it stops me from getting confused, :)
...TZX format rev. 1.21Once 1.20 draft seems to be official now I would like to suggest some additiones to do on 1.21. I hope it will be easier to upgrade once block 19 has…
... changed. Yet another proof to me that PZX got this right ... coder in me coming out always remembering that every spare byte is ...TZX format rev. 1.21Once 1.20 draft seems to be official now I would like to suggest some additiones to do on 1.21. I hope it will be easier to upgrade once block 19 has…
... question - it's not about me deciding if I like it ... coder in me coming out always remembering that every spare byte is ... creating the tape file for me and everyone else, I respect ...
