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Strange keyboard port reads on 48+Hi all, I don't know whether it was already discussed (I also searched forum, but there are too much of results searching "48k keyboard" so I didn't…
... hey, the last read from memory before port is read is not at the ... -
Help for beginner with z80Hi chaps, I'm reasonably new with z80, but had a fair amount of experience with 68000, so decided to give a few things a go. One little thing I'm t…
... embeds the music data and playback code from whichever game the ... data from the .ay file, load it into the appropriate locations in memory ... to know which bits of memory are going to be occupied ... Since these contain actual music data in a known format, rather ... -
Less MIA - Thunderbirds (1989)(Grandslam Entertainments)[+3 disk]Hi All :)<br>I don't see this title +3 disk image in WOS<br>no case ..<br><br>disk<br><br><img src="http://forest.no-ip.org/wos/tb/disk.jpg"><br><br>…
... read same disk and crc is different, in start programs add data ... time and etc.
data from +3 disks is ... -
Basic SAVE and ZX Printer supportIs there a list of emulators that support any of these two features (basic SAVE and print to printer port)? Is there a emulator comparison some wh…
... ), and just DUMP the date from TAP file, but I have ... remove the line number bytes from each line.
[/quote]
data in memory (which is then saved ... -
TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…
... up, and matches white pixel data level.
... Blue border signal, and blue data from top border.
- Line ... black pixels on white background from copyright message "© 1982 ..."
...
If you read the ULA book (or read the values I ... -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... you really need to move data, using POP/PUSH is faster ... code takes a lot of memory, but it's the fastest ... the need to move your data when scrolling. Although the methods ... be still useful when copying data from buffer to screen.
Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... files include various fast loader data files in various versions and ... data that a Z80 CPU can read, but details the way the data ... /> TAP files are based on data from a tape based on the ...IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…
... z80 is more decoupled from memory speed but it too ... not deferred beyond a read. It’s therefore common ... by means of a read of something such as ... memory mapped io address you can't cache that value and read ... it back because a read from that port ...Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... capable but it's a memory hog. I'm looking ... a new approach to reduce memory requirements but the other ... games and to load/save data from any mass storage or ... is there to make memory size pressures go away.< ... szeliga's test programs from the forum and it ...Arcade Game DesignerTime I posted an update on this, I've been working on the next version - along with another developer who is writing the editors - since July. Wor…
... occurs to me is retrieving data from sd card on Vega or ... incredibly expensive in memory terms so loading them from SD card is ... to load SD card files from within a Vega game but ...Understanding the Kempston joystick circuitHere is the schematics: http://www.retroisle.com/sinclair/zxspectrum/Technical/Hardware/KempstonJoystickInterface-Schematics.php Ok, the 74LS138N …
... is reading the screen data, the screen data will override the floating ... , the bits in the read byte from the joystick interface would be ... and allow current to flow from the data lines D6 and D7 ...A few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …
... order to access the various memory pages or banks, the Z80 ... more data needs to be moved around from memory to the screen memory. For ...ZX Spectrum Sprite chipHi everyone. As I said some time ago, I wanted to make a 'virtual' Sprite chip for the ZX spectrum, on my ZEsarUX emulator. The idea is to make so…
... , you can always disable it from the emulator menu.
[/ ... need to read at least one extra byte worth of data from RAM ... need to allow it to read one too!), so you need ... then you also have to read enough data for any sprites on ... be a significant amount of data.Spectrum Music and/or SFX needed for New GameI decided to participate in the ZX-DEV-2015 game contest. http://zx-dev-2015.proboards.com/board/10/general-compo-informaci-sobre-concurso Here i…
... the Kempston joystick. Simply read repeatedly from port 31 over the course ... it any more as the data coming back will be junk ...Interface 1 - RS232 question.I am thinking about doing some Spectrum stuff based around the RS232 port used on the Interface 1. Has anyone had any joy doing this with an emulator…
... the ROM, inject one block from a TAP file, then rig ... 't really have settings different from 8-N-1. To make ... /> - allow the emulator to read these from SYSVARS.
Fuse would the ... to simply output raw binary data to named pipes (no interpretation ...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
Yes, the ULA only reads data from the RAM when it needs ... said data to send to the VDU ... area, the ULA does not read any data from the RAM.
The ...No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…
... controlling the CPU, contending the memory, etc. Also, his job ... frequency, grab pixels/colors, contend memory, etc. Plus, he will run ... the CPU to alter screen data in the borders to ... PAL COG is somewhat pulling data from external SRAM.
...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... writes. It has to read the video memory (pixels/colors) for the ... CPU decides to read/write from video memory (or any memory in the 16K ... guess I need to re-read the memory contention chapter a dozen ...Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…
... CPU has no clock signal from the ULA (via the transistor ... and is dragging down a data line.
If you ... on the CPU (pin 6 from memory IIRC). If that is okay ... are active. Also check the data bus pins (D0 to D7 ...Serious SpectrumHas anyone here used their Spectrum for anything other than gaming and programming back in the eighties? I see all these business and productivity ap…
... with Opus Discovery to expand memory to the size of a ... able to export the customer data from Spectrum to PC.
Poke protectionAre there different tricks for finding pokes harder? Which you think is most hardest?
... .[/quote]
'Breakpoint on read over a memory area'. Modern emulators are ... , POKE to an address generated from the resulting CRC, sit back ...Fallout 4Looks like it will be announced tomorrow: http://fallout.bethsoft.com/<br>
... Mirelurks.
Also completed the Memory Den mission which was weird ... that's going to take data from something. I've put it ...Help! I'm learning Machine Code...Having decided to take the plunge and learn to machine code a while ago, I have started in earnest using the much recommended 'Mastering Machine Code…
... into memory where I'll then be able to read it from BASIC ...New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
... , I've ran out of memory anyway), how is it possible ... recalling each level from memory (or of loading it from the disk in ... disk images), keeping track of data such as the last screen ... levels into different banks of memory to be recalled later, only ...ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
However bank5 occupies memory area from 16384 to 32767 (16384 bytes ... wrote you wanted to decompress data from 32768 to 60000.
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... Saukas;856293"]However bank5 occupies memory area from 16384 to 32767 (16384 ... wrote you wanted to decompress data from 32768 to 60000.[/quote]
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... A
; COPIA copies data from banks 1/3/4/6 ... 0 using bank 5 (video memory) as a buffer.
; ... LD HL,49152 ; start of data to copy
LD DE ... to copy
LDIR ; copies data
LD A, ...Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... read bytes from index, instead of computing HL and going sequentially over data ...ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... a Z80 instruction fetch and memory refresh cycle.
memory chip select.
read data lines, since we don ... transition to trigger when to read data lines.
... some tests with a data analyser to check ...
