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Points on +2 Cassette to add Mono plugHi All, I am looking for the points on the ZX +2 cassette board where I can add the wires to a mono jack to load from WAV Anyone help?
[QUOTE=balford;777725]
The black +2 method linked to ... above goes straight to the ASIC so you've got ... /> It goes through just the same tape input conditioning circuit as on the +3. -
What's going on with the 128 music in Madballs?I always remembered my copy of the (terrible) Madballs having a neat 128k tune, but for a long time now all the TZXs I've been able to find have only…
... of the original tune on the +2 and the alternate AY tune on the +2A/+3. However ... if I manually loaded the game via Tape loader on the ... arsed to go into BASIC on the +3 to test it multiple times ... -
Cleaning the Spectrum inside and outJust wondered how people clean their Spectrums inside and out. I have been using isopropyl to clean the port connections on my +2 and +3 but not sure…
... . I'm going to try the car plastic restore spray and ... might take the remaining original pad from the +3, put it on the +2 to ... , then put all new pads on the +3.
Has anyone cleaned ... -
+2a/b power questionWill a power supply from a +2a/b be sufficiant to run a +3 if no other devices are connected to it? i know its not ideal but its all i can put my ha…
... floppy drive power connector in the +3... No good if you wanted ... to use the 3" drive though.
If ... a separate rectifier for +12v on the +3 PSU with diodes rated for ... measured what current the +3 actually draws when running the drive motors, or ... -
+ 3 floppy drive clicking then nowtJust picked up a split mint +3 so i expected it to work perfectly but when i switch it on or reset it the floppy clicks about 10/12 times and then no…
... the same on the black +2
does that mean on the +3 ... nothing uses 12v
on the ... +2 the tape drive uses 12v thats the ... /> that isn't the same on the black +2 threw me -
Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... able to re-engineer the Spectrum as the +2 and sell it ... a substantially lower price than the CPC464 probably just came as ... 'm aware Altwasser only worked on the +3 and later models. Also, as ... , Amstrad contracted out the re-engineering of the 128 to a company ... -
Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... m aware Altwasser only worked on the +3 and later models. Also, ... Amstrad contracted out the re-engineering of the 128 to a ... was between acquiring the company (April) and releasing the +2 (October ... joined Amstrad just before the Sinclair takeover and, as ... -
1-resistor fix to +3 sound distortion issue - any feedback?I decided - with my Dad's help, since I am little less than a butcher when it comes to soldering - to fix my +3 sound issue. I noticed the less invas…
... up with when I did the +3 sound fix.
... realised that the cause was the connecting together of AY-3-8912 ... C38 to couple them to the audio amplifier circuit individually.< ... finally gave clear sound on the +3. The volume of the 3 AY channels was now ... -
Games With AY Music But Not In GameI was listening to the archive on Project AY today (as it's better than what you get on the radio right now) and noticed that a couple of games had f…
Usually memory/storage restrictions - some of the music is usually reinstated on the +3 disk releases of the games in question. -
1-resistor fix to +3 sound distortion issue - any feedback?I decided - with my Dad's help, since I am little less than a butcher when it comes to soldering - to fix my +3 sound issue. I noticed the less invas…
... thing to change on the +3, once you have done a ... a low pass filter on the output of the audio amplifier and prevents ... 7nF capacitor to move the cutoff frequency of the filter up to ... br />
With the original 100nF capacitor the cutoff frequency is about ... -
sram replacemnt 64KBi just developed sram upgrade for 64kb 1bit memories. small, efficient, bga :-) below picture from zx128+2. soon, i will test it in others speccys -…
[QUOTE=1024MAK;785829]In a 128k machine, what would you use the extra RAM for anyway?
[I][B]Mark[/B][/I][/QUOTE]
On the +3 (especially under CP/M), a bigger RAMdisc. -
Keyboard compatability question (in theory)I don't have access to check this and an image search on Google etc does not always lead to accurate results. Anyway, in theory: Can I use a 48+ / …
... someone else is doing, that the connections on the +2 membrane are in ... /> When I figured out the matrix/connections on the +3 membrane I did it ... by tracing out the connections from ... -
how to .... Rotronics WafadriveHi all, How to make dump of wafadrive cartridges (to PC) ? any software to do this ? or any way ? I have same questions about microdrive cartridges :…
... be executed as soon as the wafer directory is accessed, overriding ... erased without re-formatting the wafer. The BREAK key cannot be ... would take a random guess the 'protected' (second paragraph) ... not far off from the bootstrap type loader used on the +3. :???: -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... signal levels the mod outputs are the relevant parts ... be 75 ohms, and the levels should be luminance ... between the two to add the chrominance back onto the luminance ... my s-video mod on the +3, but I know that ... solder the mini-din ;)
Clip on ferrites ... -
Play Expo 2014Today common sense left me temporarily and I booked a flight, hotel and a ticket for the Play expo in Manchester. I will probably spend a lot of time…
Was the chuckie egg competition on the +3 with the 48k next to it? I saw some bloke on level 29 or something on Saturday. -
Play Expo 2014Today common sense left me temporarily and I booked a flight, hotel and a ticket for the Play expo in Manchester. I will probably spend a lot of time…
[QUOTE=spud;796957]Was the chuckie egg competition on the +3 with the 48k next to it? I saw some bloke on level 29 or something on Saturday.[/QUOTE]
I was playing on the +3 and if it was between about 1:15 and 3:15 it was probably me. -
Less MIA - Zombi (1990)(Ubi Soft)[+3 disk]Hi All, less MIA title, not bad at all :) [IMG]http://forest.no-ip.org/wos/zombi/disk.jpg[/IMG] samdisk disk image [url]http://forest.no-ip.org/wo…
Nice one Gorski !. I've been keeping an eye on the +3 disk on ebay but it was always out of my budget :-(. -
ZX81 Power SupplyI have a ZX81 with the original 0.7A power supply. I know that this has trouble running many add-ons and was seeking advice on a suitable replacement…
... will do. Just ensure that the tip on the 3.5mm jack plug is ... the positive output connection. If you ... "9V" rated units).
The exact current rating is less ... is equal or greater than the required current. Sinclair specified 1 ... -
Early thoughts about creating a text adventureSo I always wanted to create my own ZX Spectrum text adventure. I tried looking at PAWs and GAC, but frankly I'm probably too stupid to use them. I…
... possible to develop the adventure on Windows and export ... t mind it working on the +3 only. A Z- ... usable memory so only the +3 can do that. ... /> (I've omitted the question about other programs because ... can already start designing the adventure on paper. Draw maps ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... />
On the +3 there is a second reset pin on the edge connector ... which is the z80 NRST ... being one of the errors on the Amstrad schematic for the +3. I've ... have to trace the connections out on my +3 again some time ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... the NRST to the Z80. (also fed to the RESET output on the ... upper side of the expansion port ... no effect on the operation of the speccy whatsoever the way it' ... so removing that resistor (R76 on the +3) should have no effect :)< ... -
Spectrum +2a memoryHi all, Happy New Year. A quick question, I have a Spectrum +2a that I am seeing a very intermittent fault, once every 20 - 30 power ups. I plug…
... /> Does anyone know which of the 4 IC's this would ... ? or is it spread over the 4 4164s?
[/QUOTE]
on the +3 family machines.
two ... chips for the contended pages and the other two for uncontended ... -
RGB video issue on +2 and +3. Signal high?I have a couple of +3's and a new +2a that arrived today. When I plugged in the +2a using my RGB lead from Retro Computer Shack I was reminded of a n…
... composite and RGB signals. The composite signal is fed to ... /> Not on the +3 family. They have a composite sync pin on the RGB socket ... straight from the gate array (and ... hasn't been connected to the blanking pin or something ... -
RGB video issue on +2 and +3. Signal high?I have a couple of +3's and a new +2a that arrived today. When I plugged in the +2a using my RGB lead from Retro Computer Shack I was reminded of a n…
... example the 12v pin on the RGB port on a stock +3.
The second ... . You could cut the trace between the two pins on the +3, or just replace ... R44 with zero ohms and move the ... -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... of the table shows the name and value of the resistor in the +3, and the ... the +2B/+3B circuit.
The two rows showing a dash on the +3 ... column are the resistors that don't exist at all on the +3, against the ... -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... R42 on the +3 is 2.2k, it changes to 1.2k on the +3B ... renamed R207 etc.
The 220 ohm resistor added between ... the emitter of TR5 and 0v is R206 on the +3B. On the last ... row of the table. -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... revisions of the +3 motherboard have have the same resistors. The circuit was changed ... which aren't present on the +3 motherboards so you have to ... the table are where the value of the resistor changed from the +3 boards to the ... -
DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... sure it was the +3, as they were after the disk version. I ... have been tested on the +3 also.. does any of the loader code conflict ... ? or it's the actual machine (it's been ... -
DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... have been tested on the +3 also.. does any of the loader code conflict ... gameplay. On my +3 it's fine.
Load the same ... has corrupted sprites on the +2 but is fine on the +3. Again if you ... load it into the +2 via the tape ... -
Zx spectrum +3 disk driveCan some one tell me how too put a spectrum 3" disk drive onto a PC do you just plug it in and it will work and then how do you back up the disks tha…
... have any of the photos in the wayback machine.
on your PC to the 26 pin connector on the 3" drive ... IMPORTANT[/B][/U]: the power pins on the 3" drive are in ... a different order to on ... an adapter or rewiring the connector you'll ...
