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PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... details like trying to save a byte here and there. Let's ... to store, then work out a packing scheme.
Premature ... -
PZX file format draft[QUOTE=Andrew Barker;186084]To this date, there is no rival format for TZX, despite people saying they can do better. Well the challenge is on, prov…
... details like trying to save a byte here and there. Let's ... to store, then work out a packing scheme.[/QUOTE]
Simple problem, driving me mad!!!Sorry, false alarm, fixed it, sorry to bother you ;)
... had a byte used to let me know if a character should ...
[code]
ld a,(de)
and 128
a character
[ ... it was checking for a foreground character and instead ... my game Bipboi again after a break from the scene, ...Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
... =Philip Kendall;190176]This is a very different statement from what ... be done with GDB... where a byte of data has one additional ... if it wasn't for a plethora of emulators that aren ...Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
... be done with GDB... where a byte of data has one additional ... .zip]Mikie's page[/url] a perfect replica of the original ... that not be encoded using a normal turbo block? As I ... see it, it's just a set of 582-582 or ...Vote for the change of TZX formatThere is an ongoing discussion on the proposal of Patrik Rat to change the current TZX format specification to one that is simpler to implement for e…
... is some stream containing a sequence of pulses. The ... 9 bits to form a byte, and how to interpret ... that each logical byte is stored as a byte in the ... tool would work with a pulse stream as described ... a need to insist on having each logical byte stored as byte ...Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…
... an 8-bit stream than a chunk? It's read one ... 8-bits at a time. Each bit in a byte that's being ... transferred along a data bus has ... which is why they take a lot longer to execute than ...Why the name "8-bit computer"?The Spectrum was called an 8-bit computer, but what does that mean? For modern hardware and operating systems (32 or 64-bit) it seems to be the poss…
... 8-bits at a time. Each bit in a byte that's being ... transferred along a data bus has ...Question about digitized sound and videoI searched the forums and couldn't find the answer, so here it goes. Regarding digitized sound: I remember reading an article long ago about a vid…
... take less memory and have a longer duration?[/quote]
a byte)
- alternatively, 5 ... 2 1-bit samples in a byte).
In ... there will always be a trade-off between sample quality ... post[/url] to include a package that Karl McNeil ...Border emulationHow is the border emulated to do all the fancy little tricks such as in Aquaplane? I've got some basic border emulation working but it only displays…
... tips or comments or even a bit of pseudocode to show ... do I need to update a byte at the end of each ...Border emulationHow is the border emulated to do all the fancy little tricks such as in Aquaplane? I've got some basic border emulation working but it only displays…
... difference between perfect synch and a total mess.
[quote ... do I need to update a byte at the end of each ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... =Fikee;200783]probably overkill when a LDIR is described as 'extremely ... LDI instructions instead. LDI copies a byte in 16 tstates, so 32 ...Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... />
The memory in a Spectrum is only 1 bit ...
So when you access a memory location, the Spectrum selects ... yielding 1 bit of the byte. So one bad chip ... it's a 4116 that's failed). A memory testing ... by seeing which bit of a byte written to then read ...speed of my Broadband connectionI have done a speed test on my Broadband connection and got a result of 2.5 and 4.2 megabits, the thing is i have just upgraded my connection to 20me…
... ;203025]I have done a speed test on my Broadband ... connection and got a result of 2.5 ... />
A bit is 1/8th of a byte, so in theory ... those rating you mantion, if a true figure, which it ... that. If you use a download manager like Offline Explorer ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... amp2 array.
A uniformly distributed random number from ... We'll do two cases: flip a coin 1000 times using u_rnd ... /> // store the outcome of coin flip by counting number of heads ... integer to float conversion. "(float)(a) / (float)(b)" where two ...68000 programming.Anyone here know anything about this? My question is: how does the programmer know how long hisinstructions are? Do determine the operands to branch …
... , posted below, only fetches a byte at a time, when I really need ... .
doesn't .w signify a word - 16 bits?
[code ...68000 programming.Anyone here know anything about this? My question is: how does the programmer know how long hisinstructions are? Do determine the operands to branch …
... , posted below, only fetches a byte at a time, when I really need ... .
doesn't .w signify a word - 16 bits?
[code ... unaffected.
A 68000 will throw a bus error if a0 ... big-endian. The lowest-address byte will be the top 8 ...What connection speeds are you on?Heya - just got curious about something. What connection speed are you on? I know that most ISPs offer "Up To 8Mb/s" (megaBIT), but reality rarely ma…
... there's 8-bits in a byte, but there is overhead when ... ... give around 10-bits in a byte. Rough figures, obviously.
Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... that any command will produce a 'out of memory' error ... . I know that a clear command solves the problem ... 208042] Finally, there's a Randomize Usr that I ... it. If you create a variable (ANY variable), you ... it a-byte-at-a-time).
To load a block ...Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... 'working' on, I get a out-of-memory error no ... after it. If you create a variable (ANY variable), you ... BASIC and then PEEK it a-byte-at-a-time).[/QUOTE]
< ... BASIC loader) was saved with a higher baud rate! The ... fine on Spectrums if using a CD-Rom Player, but ...Something completely different (new game tech-demo)Since finishing Stranded 2.5 (available soon from Cronosoft - plug!) I've been playing with the idea of doing an attribute-based, rather than pixel-b…
... . My version copies an attribute byte, whilst stripping the flash-bit ... example code takes around 24ts a byte?A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... address byte is always $FE and the upper address byte resets a single ... bit at a time (one per ... BC register being used as a BYTE COUNT like LDIR and CPIR ... 16-bit BC register as a byte count (number of repeats).
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... mountain row and find a "00" then a new plot row is ... right (j==6) or we flip a coin come up with heads ... corresponding "struct mtn" we choose a random graphical representation from the ... place the mountain graphic at a random horizontal pixel displacement inside ...Easy Compare On 2 Byte Register?e.g. HL, BC, DE Has anybody got a really easy way of doing this without comparing each byte seperately? Any maths has no effect on the flags as far a…
... turns out that comparisons a byte at a time is faster on average ... />
Anyway you can have a look at what z88dk uses ...Kempston on real machines and on emulatorsRecently I've tested several 48K games on my Spectrum +2A with Kempston interface. The computer resets when I start the game. I've tried with two dif…
... much... the floating bus is a slightly strange side-effect of ... implemented the hardware. If on a 48K machine you attempt to ... attached, you will occasionally get a byte returned which is essentially equivalent ...Bubble Bobble on SpinDoes anybody else find that Bubble Bobble has corrupted sprites (bubbles for example) in 48k or 48k+ mode in Spin? Works fine in any 128k machine mo…
... new editor it's chopping a byte off the end of an ... the whole array. The last byte is a zero, so this doesn ...Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... (and I have tested a lot of shapes)[/QUOTE]
For a blank screen around 700+ bytes ... subroutine at 32768, for a stack requirement at time ... I think it requires a lot less stack space ... do the initial fill a byte at a time where possible but ...Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... .
For a blank screen around 700+ bytes ... subroutine at 32768, for a stack requirement at time ... 48K!) when you have a single bit vertical line ... from begin to end of a horizontal line.
a byte at a time where possible ...Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…
... probably be easily implemented in a simple GAL.
a load of commonly used ... ULA doesn't put a byte on the bus after ... anywhere. The CTC puts a byte on the data bus so ... can expand this to include a DivIDE + CF connector, DMA ...
