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Made in KoreaJust a couple of questions. Were there many 48k Speccys made in Korea and when were they made?
48K rubber from Samsung is issue 2. Not sure if issue 3/3b were still made in Korea.
BTW. As I remember Apina in Poland was assembling ZX 48K+ using 4s boards. -
Made in KoreaJust a couple of questions. Were there many 48k Speccys made in Korea and when were they made?
... rubber from Samsung is issue 2. Not sure if issue 3/3b were ... Apina in Poland was assembling ZX 48K+ using 4s boards.[/QUOTE ... />
My 48k as a issue 3 in it. Doesn't ... -
Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
... a copy of your amazing ZX Spectrum ULA book just dropped ... - have you ever seen an issue 2 Spectrum with the dead cockroach ... -
Various software & hardware for sale.After having a sort out in the loft I've discovered a few things to get rid of: [SIZE="1"]SINGLE CASSETTE SIZE CASES. (all with inlays and instructi…
... s world championship boxing. commemorative issue. bruno v. tyson - ... home computer course - double issue 1+2 magazine
a ... /> input - issue 1
input - issue 2
input - issue 3
... br /> [SIZE="1"]48K Sinclair ZX Spectrum (with power supply, TV ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... ]http://drizzle.zigg.net/ZX/faulty-issue2-rascas-1.png ... .zigg.net/ZX/faulty-issue2-rascas-2.png[/IMG]< ... ]http://drizzle.zigg.net/ZX/good-48plus-rascas-1.png ... ]http://drizzle.zigg.net/ZX/good-issue2-rascas-1.png ... the Spectrum+ nor the good Issue 2.
I ... -
How faithful are you to Sinclair computers?Are you 100% faithful to Sinclair computers or do you divide your attention across multiple retro computers and consoles? I never had anything besid…
ZX Spectrum 48k Issue 2 was my first computer beginning ... and sold it back in 2 years. In '97 my dad ... -
How faithful are you to Sinclair computers?Are you 100% faithful to Sinclair computers or do you divide your attention across multiple retro computers and consoles? I never had anything besid…
[QUOTE=maiki;602860]ZX Spectrum 48k Issue 2 was my first computer beginning ... and sold it back in 2 years. In '97 my dad ... -
Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…
You may want to keep ULA chip. Most valuable part of ZX.
It seems your faulty board does not have z80 fix ??? Issue 2 is a bit mystery to me, however. -
Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…
[QUOTE=kpuchatek;603333]You may want to keep ULA chip. Most valuable part of ZX.
It seems your faulty board does not have z80 fix ??? Issue 2 is a bit mystery to me, however.[/QUOTE]
My faulty board has a NEC D780C-1, I believe. -
Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... following machines:
- a zx spectrum 48k (issue 2)
- a +2A
- a +2 (grey)
- 2 +3
4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... connected it up to an issue 2 Spectrum. As expected, ... IMG]http://drizzle.zigg.net/ZX/ULA-RAM_timing-argh.jpg[/IMG ... IMG]http://drizzle.zigg.net/ZX/SRAM/SRAM-3-08.jpg ... IMG]http://drizzle.zigg.net/ZX/SRAM/SRAM-3-09.jpg ... ]http://drizzle.zigg.net/ZX/SRAM/SRAM-3-10.jpg ...4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... for Spectrums prior to issue 4 that don't ... works perfectly in an issue 4 and above. The ... 't depend on the Spectrum issue number.
[ ... /RAS signal in older issue ZX Spectrums (see below the ... am testing with an issue 2 board that has R57 removed ...Another BUG play tapes, in ALL EMULATORs when press STOP1 FOR n=1 TO 20 : PRINT IN 254 : NEXT n : PRINT AT 0,0 : GOTO 1 RUN Type this simple code, load a TZX, pres PLAY, when ear input change between 191 …
... it in emulator, ZX-Spin with 48KB issue 2 emulated, and when find ... this code, to adapt for issue 2 or other
IN A ... C,A ; C = Detect basic issue
C is later ...48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…
... kept blowing up on my ZX 48k issue 2. I had that phenomenon ... :
1. 7805 Blow
2. 4116's (lower ram) go ... bad
2. After fixing that, run for ...Official CSSCGC 2012 Competition Threadcsscgc2012 already got it's first entry (from R-Tape) :) So I'm almost forced to start the new official csscgc thread here. The official c.s.s Crap …
... on a 48K rubber keyed Issue 2 Spectrum.
Though I ... beginning, it was made using ZX Paint and an image of ...Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
Replacing ram and replacing all logic, cpu, ula etc. does not help. The problem is somewhere on the PCB and I am unable to find it. I guess there is not much more to do than to scrap this ZX and look for a new Issue 2 to restart the project.ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…
... ;641553]as I have a issue 2 48k board I want to ... I understood bad, but... the ZX Spectrum doesn't need any ...Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
... eeprom from Velesoft. Unfortunately the Issue 2 wont even load this routine ... . Switched on by itself the ZX 48 will show black paper ... have spent on rebuilding this Issue 2 (I could have bought a ...16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …
... give a small update. This issue 2 have now socketed 4164s in ... is better than any other ZX I have had.
16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …
Well, I dont remember what Issue my first ZX was, I dont have ... handled 2 issue 2 (one from you), one issue 4S, and one Issue 3 128k +2 ...DivIDE CompatabilityThe Spectrum is 30 show proved a valuable event for investigating issues with Spectrums which do not work with the DivIDE.... The ones I sell are ma…
... /> My experience is that the Issue 2 boards is sufficient to breathe ... like poorly applied wallpaper... The issue 4 seems ok though. So ... does the +2 board I have. Very varying ... different versions and models of ZX.Some stupid 16K questions...Starting with... 1. Should a 16K Spectrum that's been upgraded to 48K behave [I]exactly[/I] like a 48K Spectrum? i.e. should the machine test/clear…
Issue 2 and Issue 3 had sockets for RAM upgrade, don't remember now about issue 1.
ZX ROM tests all 48k memory at start-up, so PRINT PEEK 23733 should give 255
for 48k.PlusD mini - production startedI'm developing a PlusD clone, with some features stripped to make it very affordable. The real PlusD and German clone have an 7805 regulator, but I …
... /> The worst case is the issue 2 Spectrum (with the very small ... the issue 2's heatsink is big enough.[/QUOTE]
ZX Spectrum ... consumes 10W.
ZX Spectrum + DivIDE = 14W.
ZX Spectrum + original PlusD ...ZX-Preview 2.2 publishedDear readers, yes, it's a big time of beta-testing and publishing, but I want to get my time free for my new project ZX-Assembler. Two days ago I r…
Hi clausjahn,
In ZX Preview 2.2 there appears to be a ... />
This is not an issue when copying Standard data e ... /> And this is not an issue in Hex mode.
ZX-Preview 2.2 publishedDear readers, yes, it's a big time of beta-testing and publishing, but I want to get my time free for my new project ZX-Assembler. Two days ago I r…
... clausjahn,
In ZX Preview 2.2 there appears to be a ... />
This is not an issue when copying Standard data e ... /> And this is not an issue in Hex mode.
Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…
... 001-047902 issue 2
Spectrum 48k 1982 48k AR406084 issue 2
issue 2
Spectrum +2B 1987 ... 128k GC20758 E030A issue 2
Spectrum +2B 1988 ... issue 2
Spectrum +3 1988 128k unknown
ZX ...Spectrum 128k +2 grey RAMhi all, the manual say that ram ic's should be KM4164B-15P but when i open my spectrum (not repaired by anyone) the ram chips was KM4164B-12 is thi…
... KM4164B-12 with the 48k zx?[/QUOTE]
Yes, but in ... of the Spectrum +2
[*]schematic of the 48K issue 2
[*]datasheet ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... :
[LIST]
[*]Issue 2 with 5C112E ULA
[*]Issue 2 with 6C001E-6 ... ULA
[*]Issue 3 with 6C001E ... -6 ULA
[*]Issue 4A with 6C001E-7 ULA ... .4A. I tested with several ZX power supplies and found no ...
