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48k spectrum restarts by itselfFirst of all hello from a newb and thank you for your help. This site has already offered me a lot of insight. I have a 48k spectrum that will boot …
... times. It is the only chip that is not soldered on ... -
Can ULA kill other componentsIn my search for a problem I used a ULA6C001E-7 on a board that had a ULA6C00IE-6 chip. Q1) Should this have worked? Q2) After this experiment both …
... that had a ULA6C00IE-6 chip.
Q1) Should this ... -
ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... ULA actually output a proper PAL interlaced image, with timing pulses ... -
ZXDS, DSi XL and R4 cardI am thinking of asking my family to chip in for a DSi XL for my birthday in a few week's time. Given that my main use of my current DS Lite is for…
... of asking my family to chip in for a DSi XL ... -
ULA equivalent?Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip. Micky
Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip.
Micky -
8 bit AY samplesAny one here got a great big fat (sorry, phat) folder full of 8 bit sound chip samples in wav format that I can play around with, fancy making me a c…
Any one here got a great big fat (sorry, phat) folder full of 8 bit sound chip samples in wav format that I can play around with, fancy making me a chiptune in Reason 4 :D -
More stuff..Ok, another visit to my loft and I've found some more Speccy stuff! Huzzah! Here's the list and the pics: Finders Keepers The Zacaron Mystery Fairl…
... (cassettes only)
Make A Chip (no box)
A bunch ... -
Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…
... 2048 uses MC 1377 as PAL encoder, maybe that one is ... -
ZX Spectrum colour palette - Equivalent 8-bit RGB values?I'm wishing to do some ZX Spectrum games screenshots on my Mac, but cannot find any information on the net which states what the equivalent 8-bit RGB…
... the Texas Instruments TMS9918 video chip (used in the ColecoVision, CreatiVision ... -
The quest for true 50 HzAfter experimenting with interframe blending on Sinclairean, I wonder if someone has ever managed to get a custom Spectrum-friendly 50 (or better, 50…
... run the emulator at true PAL refresh rate (better than interframe ... -
AY chip testingHi all I have 2 AY38912 and an AY38910, all are untested. Is some kind soul willing and able to test them for me? All costs met etc. Thanks S
Hi all
I have 2 AY38912 and an AY38910, all are untested.
Is some kind soul willing and able to test them for me?
All costs met etc.
Thanks
S -
Screen display but with static noisePicked up an sold as seen speccy+ on the bay,the screen on the ebay listing was garbage but i suspect it was due to the seller using his lcd tv so ma…
... something more sinister like faulty chip?,i tried the usual stuff ... -
FLASH EPROM programming on ZX SpectrumThis is photo of Winston's DIAGNOSTIC BOARD: [img]http://velesoft.speccy.cz/other/diagboard.jpg[/img] Schematic and flash utilities: [url]http://www…
... programming protocol for Am29F040B flash chip (or equivalent).
I ... -
Most touching AY music on a Speccy?Speccy music composers have shown us that the the AY chip can do much more than it originally was meant for. There are many tunes that I like and adm…
... us that the the AY chip can do much more than ... -
a "few" games ;)well since ebay is chopping my limit to 100 items very soon.. heres 250+ and I know a few are not so common.. I combine post.. up to 5 single covers …
... by Mastertronic
Make A chip by Sinclair
Master Chess ... -
New soundcard for zx spectrum[url]http://translate.google.com/translate?hl=cs&sl=ru&tl=en&u=http%3A%2F%2Fmicklab.narod.ru%2FZXMSoundCard.htm[/url] It's new sound card based on T…
[url]http://translate.google.com/translate?hl=cs&sl=ru&tl=en&u=http%3A%2F%2Fmicklab.narod.ru%2FZXMSoundCard.htm[/url]
It's new sound card based on TURBO-SOUND interface (2x AY chip) + SAA1099 (sound chip from SAM COUPE computer). -
So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... . There's actually a chip to do all of this ... and VCO all in one chip) which I would have ... (which are connected together off chip and passed through the low ... as csmith's Harlequin :-) The chip on the top left is ... to the left of the chip.
The bottom ... -
Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
... complete rebuild onto a single chip or new ULA's, extra ... -
"Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…
... about memory and the AY chip, but I heard that the ... -
LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…
... MHz from ZX board. ( ULA chip use 17.7345 MHz = 35 ...Silly question on Russian clonesIv a silly question to ask... Iv been looking at web links about Russian ZX clones with envious eyes, wondering if I might spend money on something…
... wondered whether such machines are PAL or NTSC based machines...< ... them across, since both are PAL based...
..now ... wondering whether Russian machines are PAL or NTSC based generally?...< ... confess to not knowing whether PAL/NTSC standards apply to ...I've got Disciple Replacement IC'sI've got a GAL replacement for IC 8, and IC 9. I had a broken Disciple and it turned out to be the PAL20L8 (IC 8 ). PAL's are hard to find so I've bo…
... the PAL20L8 (IC 8 ).
PAL's are hard to find ...48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... very primitive chips, each chip only stores 1 bit ... separate power supplies, each chip needs 12V, 5V and ... is the ULA chip, the only custom chip in the ... wouldn't, replacing the chip fixed the issue, I ... three connected, the suspect chip was was missing its ...Basic hardware developmentRecently I looked inside a SNES controller and it has two little IC's that take one bit of input from each of eight lines and outputs them on a line.…
... a COM port. But the chip in the SNES controller uses ... , or is there a different chip that would be better suited ...Wanted: Spectrum ZX,48,Amstrad CPC, BBC Micro, acorns (USA!)Hello everyone, I help some friends put on some vintage computer gaming events (they are free events at a local library.) In addition to this, I b…
... taken an interest in the PAL micros that we missed out ... power (50hz versus 60hz) and PAL video.
I'm ...ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…
... 3 dma to one audio chip whereas one dma could have ...Small CRT monitors - Possible for saleHi all I may and only may be getting some smallish (9") monitors from a TV studio, they are multi input, multi format (SECAM/PAL/NTSC x 2) so could …
... multi input, multi format (SECAM/PAL/NTSC x 2) so could ...
