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Messages - moggy

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1
Believe it or not Siggi, on the German ZX forum, runs a web server on a ZX81!!  :o

2
I would just like to say a massive thank you to all the lads and lasses at RCM who made this a great day out (sorry I had to leave earlier than planned  duty called and all that)
 Great to put faces to names, and the museum itself, what a bloody little gem this is!
Not just the hardware but a cracking library too.

It was nice to come within STEALING I mean looking distance of  a Jupiter Ace ;D and to see my beloved 81 holding its own amongst all the 8 bit muscle machines was a joy also.

On a more serious note it should be said that repositories such as these are so important as they are, in my opinion, a snapshot of a very important period in UK computing history where for a brief moment in time we were amongst the very best in the world. Because of the 8-bit explosion computing was taken out of the hands of the "white coat" technicians and put into the hands the the guy/gal in the street,and happily (for me personally) into the hands of people like Charlie Robson and Andy"Professor"Rea.

I have lost count the number times I have heard people say "yeah I'm in IT-program design-web development or whatever because mum and dad got me a ZX81/Oric/BBC etc way back then" I reckon a lot of people owe their careers to those heady days in the 80's when the name Sinclair was on every-bodies lips and if it were not for places like RCM and more importantly the PEOPLE who dedicate the most important thing in their possession,THEIR TIME, then all the above could end up as nothing more than an interesting if badly worded Wikipedia entry, no doubt crediting our colonial cousins across the water with invention of the BBC model B! Well they did invent Colossus didn't they?(tongue firmly in cheek)

In conclusion I think it's safe to say a small but very important part of our heritage is in safe hands,long may it continue and to Andy and his band of merry men and women please accept this Moggies grateful thanks for the warm welcome, a wonderful day and thanks also for looking after our past,hopefully, long into the future.


Moggy.

3
HARDWARE/SYSTEMS DISCUSSION / Re: ZX80 on ebay, strange mod ?
« on: May 13, 2014, 01:18:19 PM »
If memory serves it's a NMI (non-maskable interrupt) board that allows it to run like a zx81.

4
GENERAL RETRO CHIT CHAT / Re: ZX81 museum
« on: March 28, 2014, 02:03:18 PM »
Yep got that one for the 81 myself.
Along with My printers Alphancom and Sinclair, Zon-x music synth, 25volt eprom programmer, Maplin talk back, and a few more besides, a lot of  speccy stuff started life being bolted to the little black door wedge first. :)

5
RCM ANNOUNCEMENTS / Re: Non Active Members
« on: May 04, 2013, 03:19:49 PM »
As My old Dad was fond of saying , "Never wipe Your ars* with a broken bottle"..

Oops sorry wrong forum thought this was anecdotes monthly :-[  Slinks off for a soothing saucer of milk.

6
CODING AREA / Re: ZX Spectrum machine code
« on: June 25, 2012, 07:23:47 PM »
I always thought DJNZ used B not C as its counting register (a quick flick through EA parrs' Z80 w/shop manual confirms this)

To use BC in a counting loop a JRNZ is required Not DJNZ using the accumulator to check the contents of B after decrementing and OR-ing with C then jumping when both are at 0.


Moggy

7
FOR SALE / WANTED / Re: wanted zx81 tv cable
« on: May 30, 2012, 08:26:24 PM »
Thanks for the help everyone. Managed to snag a spare RF lead from one of my Snes's and just about got it sorted. Iv'e managed to find the signal from it but the signal is really bad. Is this a common sort of problem that can be resolved by careful retuning, or is this were the composite comes into play? Sorry for sounding such a noob. I feel as though iv'e lost a few nerd points!

Thanks

You may have tuning problems with New TV's especially LCD or Plasma, try get hold of a old 14" CRT from car boot or something, (usually about £5-£10), that should cure your problems, unless of course you have a faulty ZX81.


You will get a decent picture with Composite Mod, on newer telly's....(quite easy to do as well if you know how to use a soldering iron)

All the best
Max



But without the newer ULA the composite mod WILL NOT WORK as the others lack the back porch signal needed for colour sets.

ULAs numbered 2C158E or 2C184E black and white tv only, 2C210E colour crt tv only.

It might pay You to open up the zeddy and check the ULA number before buying a tv.


Moggy.

.Thanks again for all the help chaps and or chappets


Had a look inside and it would appear my model has the ULA 2C184E chip inside here.

Talking about somebody at the RCM modding it, what would we need to have done to it to get it up and running smoothly ( or as smoothas it could be ) and how much are we talking potentially to get the job done.?

I should barley be allowed to used a pencil let alone proper grown up tools
Im considering selling this on at some point so obviousley dont want to spend too much on it in all honesty. A ballpark idea will be fine if anyone can help at all?

Thanks again everyone, didnt expect a thread about a cable would get so long!


With that chip B/W tv only so composite mod is out of the question, the 2C210E chip is like rocking horse crap to find and the gubbins from sell my retro is nearly 35 quid.

Suggest car boot B/W portable as cheapest option.


Moggy.

8
FOR SALE / WANTED / Re: wanted zx81 tv cable
« on: May 28, 2012, 04:49:42 PM »
Zeddies with older ULA's can be modded for B/W sets but there's no real point in doing mod  unless You stumble across one of those rare  5" Roadstar B/W portables that were fitted with AV input.



Moggy.

9
FOR SALE / WANTED / Re: wanted zx81 tv cable
« on: May 28, 2012, 04:35:51 PM »
Thanks for the help everyone. Managed to snag a spare RF lead from one of my Snes's and just about got it sorted. Iv'e managed to find the signal from it but the signal is really bad. Is this a common sort of problem that can be resolved by careful retuning, or is this were the composite comes into play? Sorry for sounding such a noob. I feel as though iv'e lost a few nerd points!

Thanks

You may have tuning problems with New TV's especially LCD or Plasma, try get hold of a old 14" CRT from car boot or something, (usually about £5-£10), that should cure your problems, unless of course you have a faulty ZX81.


You will get a decent picture with Composite Mod, on newer telly's....(quite easy to do as well if you know how to use a soldering iron)

All the best
Max



But without the newer ULA the composite mod WILL NOT WORK as the others lack the back porch signal needed for colour sets.

ULAs numbered 2C158E or 2C184E black and white tv only, 2C210E colour crt tv only.

It might pay You to open up the zeddy and check the ULA number before buying a tv.


Moggy.

10
FOR SALE / WANTED / Re: wanted zx81 tv cable
« on: May 27, 2012, 04:41:48 PM »
Certainly is a normal RF leaf . . . however I highly recommend you get it composite modded - should work on most TVs then . . . ;)

A

Only if it has the later 2C210E ULA  and then cathode tube types only.

This cures it albeit at a price.

http://www.sellmyretro.com/offer/details/Sinclair_ZX81_ZXVid_-_Composite_Video%25ULA_Fix_%28self-fit%29-2338


Moggy.

11
HARDWARE/SYSTEMS DISCUSSION / Re: your latest Retro computer purchases
« on: November 30, 2011, 02:42:55 PM »
Picked up a ultra r@re copy of Beach Head still sealed for the C16 at the weekend. Ive never seen one of these before, let alone still in its wrapper.

I will treasure it for the rest of my life.

 ;D ;D

(Thanks RCM  ;) )


Ultra rare because most of these three level rip offs ended up in the bin, I Know Mine did :D
May it remain ever sealed ;D

Moggy

12
GAMING . . . / Re: Brand New ZX81 Game . . .
« on: November 06, 2011, 07:34:09 PM »
This site has files from each Composer in a variety of formats .
It's in Russian so just click on each Composers name and download the zip files found there.

http://zxtunes.com/authors_list.php?&ln=eng


Moggy

13
GAMING . . . / Re: Brand New ZX81 Game . . .
« on: November 05, 2011, 11:01:01 PM »
Looks like they don't have any in stock anyway . . . also want one of the AY/Joystick add-ons for the ZXPand now too! :)

A


Andy the first lot of AY units sold out in about a nanosecond!!
Should Sir Morris build any more and You buy one He has also written a song player that uses the PT3 format, Andy rea has also adapted Sergey Bulbas player to use on the zeddy and is in the process of writing a spectrum type tracker program as well , although this may be a long term project.

Anyone who has an AY device but no files I've collected about 2,600 of the buggers in pt3 format should You need them.
 
Bobs new game by the way is a corker It has Me hooked and I am about as much use at games playing as fire is to boiling a chocolate kettle.

Regards
Moggy

14
GENERAL RETRO CHIT CHAT / Re: Chip(tune)tastic!
« on: September 28, 2011, 03:58:49 PM »
Hi all

To support this Andy Rea from the ZX81 forum has ,with the Authors permission,
adapted Sergey Bulbas PT3 player created an STC file player and is currently writing a tracker program similar to the ones used on the Speccy, for the Zeddy!!! (clever  little bugger :D)

The PT3 player is great, I altered My copy slightly so that it can play a fixed amount of each of the 1000 plus song files in its directory before stepping automatically to the next one,so You can pick favourites, for example, without listening to each one all the way through.

SD card reader ,composite video out plus Hires capability, auto tape conversion, now sound and a joystick port,
and, thanks to a nice ROM and firmware update By Sir Morris ,the ZXpand can now auto run a program at bootup/reset.

Not bad for a thirty year old door wedge!!

Moggy

15
HARDWARE/SYSTEMS DISCUSSION / Re: ZXpand interface for the ZX81
« on: April 30, 2011, 12:42:28 AM »
In thirty years Of zeddy collecting I have never had so much fun.
Did a mod on My cases which I think looks reasonable, drilled a couple of 3.5mm holes and glued on a zeddy modulator insulation insert to act as a diffuser for the LEDS, lovely!!  And a nod to Lord( I'm in His debt at the moment so I promoted Him!) Morris on the labeling. Had a slot cut in the end plate for the card, jobs a good un,

I have had the honour of Beta testing a piece of software Charlie has sweated blood on for the Xpand, which I think He will be uploading to the RWAP zeddy forum soon.
I will leave Him to explain more as it is His creation and He has probably modded it even further as I speak!

Football Manager loaded in 0.5 sec  YESSSS!

Regards All
A  very contented Moggy

Sorry about the crap pictures Not My strong point at all.

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