-
Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…
... that compatible with the Issue 1 motherboard?[/quote]
I have ... an issue 1, but it's 16k RAM ... of suppliers of 16 x 1 bit DRAM chips. Some manufacturers use ... -
7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…
... dropped the eight 16k by 1 bit (4116 ) DRAM chips and just ... used eight 64k x 1 bit, or later on, 64k x ... 4 bit DRAM chips (from 16 chips ... -
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…
... a matrix of 16384 x 1 bit, so you need eight to ... 64k bytes because 65536 x 1 bit DRAM chips are used for ... -
Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …
... is duration of bit "0", W is duration of bit "1", with W ... of them, and 9th bit should be "1". In this case, average ... what if instead of 1 fixed extra bit, we only add the ... byte an add an extra 1 bit. To decode, read 8 ... bits set to 1, read an extra bit and if it ... -
Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …
... ... what if instead of 1 fixed extra bit, we only add the ... byte an add an extra 1 bit. To decode, read 8 bits ... -2 bits set to 1, read an extra bit and if it ... 's 1 invert the previous 8 ... got was using an extra bit every 4 bytes, except when ... -
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…
... "]Above, tstih mentions his IF1 bit banging code that works at ... . 30 t-states to send 1 bit. With overhead that's 300 ... per interrupt. That is approx. 1/7 of all processor time ... -
Opus DiscoveryWould anyone have any materials about programming the Opus Discovery disk? I know it overrides ROM and uses microdrive commands, but I am more into b…
... (a.o holding 'drive select'' bit):
port A .... 12288 #3000 ... 's some tough questions:
1. the track/sector register gives ... PIO registers? For drive select 1 bit would suffice. But there are ... -
Best beeper player with good trade-off between sound quality and CPU timeHi all.. I'm toying with the idea of writing a small demo/intro on the 48k Speccy. Last time I did this I cheated and used an AY add-on but this t…
... ://github.com/utz82/ZX-Spectrum-1-Bit-Routines/tree/master/nanobeep
bit counters instead of 8-bit ones is heavily ... -
Best beeper player with good trade-off between sound quality and CPU timeHi all.. I'm toying with the idea of writing a small demo/intro on the 48k Speccy. Last time I did this I cheated and used an AY add-on but this t…
[quote="utz;852685"]Hi evilpaul, take a look at this code: https://github.com/utz82/ZX-Spectrum-1-Bit-Routines/tree/master/nanobeep
[/quote]
Lots of awesome players there utz. I wish I had the time to put them all in z88dk. -
ZX-Art graphics updatesWe are gathering a large collection of in-game graphics on ZX-Art at the moment. The ultimate purpose would be to make an easily browsable online arc…
... I'll create a "1-bit" dithered version to 1) help me with ... on, 2) have cool mono 1-bit version of my illustration. I ... -
Are turbo loaders worth it?I found turbo loaders fascinating and I've spent quite some time disassembling and trying different types, and they work great when I load the games …
... sounds so "different" is that 1-bit is 50% as long as ... normal loader / fast loader where 1-bit is 100% the length of ... 0-bit, virgin's flash loader exhibited ... implemented standard double length of 1-bit on strange loop..... -
Are turbo loaders worth it?I found turbo loaders fascinating and I've spent quite some time disassembling and trying different types, and they work great when I load the games …
... sounds so "different" is that 1-bit is 50% as long as ... normal loader / fast loader where 1-bit is 100% the length of ... 0-bit, virgin's flash loader exhibited ... implemented standard double length of 1-bit on strange loop.....[/quote]
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... Bobble - Hit Squad (without music)/Musical 1 (with music)
Cobra ... Top Gun - Hit Squad (without music)
Tornado Low ... turbo loader).
Music Logic: Locks up upon loading ... load it with 48K music and sound effect. Simply ...Britsoft - Read-Only Memory Publishing"Britsoft" by Read-Only Memory Publishing is their latest book charting the rise and fall of game development in the UK from the early 80s to the end…
... and Seven Up. I created 1-bit mono portrait and landscape versions ...P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…
... "]hi, you talk about 1 OR 8 bit scroll
what about ... />
I have done 1 bit and 4 bit scrolls, but in this ... , without seeing color clash, 4 bit scroll is out.
bit scroll, left and right.
ZX Spectrum games with good in game music?What games do you guys like that had good in game beeper or preferably AY music in game while playing?
... don't feature in game music? even a 128k version with ... is because
1. 128K music is implicitly considered an 'extra ... ' unlike let's say beeper music. There are communities, typically non ...Meaning of Format Byte of a TRDOS DiskDoes anybody knows the Meaning of the Format Byte (Byte 227 in Sector 8 (Sector Count from 0) in Track Zero) of a TR-DOS Disk (Real Disk of a Bet…
...
[code]
Bit 4 / Bit 3 / Bit 2 / Bit 1 / Bit 0
22 = 80 ... meaning of Bit 4 (=always set ?); Bit 3 and Bit 2 ... Lenght | Description
...
227 | 1 | disk type
...
(*) ...Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... initial 0 bit
0x08CA ; 1+
0x06AE ; 1 or a initial 1 bit
0x0357 ; 0
0x0357 ; 0 defining a further 0 bit ...
0x06AE ; 1
0x06AE ; 1 or a further 1 bit
bit of every byte. > ...Chaos Constructions 2016: Realtime composThe biggest Russian demoparty Chaos Constructions will take place 27-28 august at Saint Petersburg, a big part of which will be dedicated to our belo…
@RMartins, thanks! The tune was made with [url="https://github.com/utz82/ZX-Spectrum-1-Bit-Routines/tree/master/squeekerplus"]Squeeker Plus[/url], a fairly recent creation based on zilogat0r's legendary Squeeker engine.Chaos Constructions 2016: Realtime composThe biggest Russian demoparty Chaos Constructions will take place 27-28 august at Saint Petersburg, a big part of which will be dedicated to our belo…
... ://github.com/utz82/ZX-Spectrum-1-Bit-Routines/tree/master/squeekerplus"]Squeeker ...Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…
... to be incremental and scrolls 1 bit upon every successive CALL to ... lot.
Test no.1 gives quite a pleasing result ...XMAS 2016 tape magazineI'm planning to release a one off xmas tape mag in early December, nothing fancy - something along the lines of [url="http://www.worldofspectrum.org/…
... as well, or even a 1-bit or beeper tune on a ... can do the best 8-bit Christmas ditty:
http ...How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…
... area 4 pixels left every 1/50 seconds. Or the ... a second. That seems a bit too fast (Hmmm...Sonic?) ... for screen. Which is a bit slow. Gaa.
... need to store more then 1 bit to carry. So you ... /> rl (hl) ; screen contents 1 pixel left
rl a ...Homebrew game from 80's by Adrian KeylockTrying to track down a game by a boy I was in school with in Porthcawl, South Wales. I know Adrian made a spectrum game and I got it from a local sho…
... going to be stored using 1 bit so simple blocks on or ... they use 2 bits and 1 is for switch to diff ...How to take SCR out of multicolour games?Emulators do not seem able to take scr out of Nirvana games correctly. I have tried SpecEmu, Speculator and Jspeccy. Try to save El Stompo or SunBu…
... can be determined from:
1 bit that represents the bitmap
1 bit of the attribute map) we ... frame but with the "pixel" bit of the colour toggled for ... which should have the FLASH bit set. From that you can ...How to take SCR out of multicolour games?Emulators do not seem able to take scr out of Nirvana games correctly. I have tried SpecEmu, Speculator and Jspeccy. Try to save El Stompo or SunBu…
... be determined from:
1 bit that represents the bitmap< ... ignore the interval and 1 bit of the attribute map) ... with the "pixel" bit of the colour toggled ... should have the FLASH bit set. From that you ... problems:
1. The method you described will ...ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... , all the DRAM chips are 1 bit wide, so often a fault ...
