Videopac / Odyssey2 forum

Anything not specifically Videopac / Odyssey2 => Other Systems => Topic started by: gertk on October 16, 2011, 08:35:53 PM



Title: My old ZX81 restored to full function
Post by: gertk on October 16, 2011, 08:35:53 PM
At the Commodore meeting last saturday I found a complete ZX81 set. My own ZX81 was disassembled many many years ago to build it into a (wooden) case with a real keyboard, a monitor and cassettedeck and the case was stored in the attic. The whole system was sold a long time ago and the empty case was forgotten. I found the case back when I moved into this house 10 years ago and stayed on the lookout for a working PCB.

The system I found in Maarssen had a broken keyboard flatcable but that was repaired on the spot with a pair of scissors kindly provided by the kitchen. My own case was almost brand new so I decided to put the board in my own case anyway. It still has the red ZX81 logo.
Now the ZX81 is alive again, the rampack which came with the set is working perfectly also but is a non Sinclair product called:

"SPECIAL RAMPACK by audio computers" and the 'special' part made me open the case. It seems there is room for some more chips but I have not found out yet what they might be, perhaps some rom expansion or such. One big plus for this rampack is that it sits on very tight and there is no sign of the dreaded 'sinclair wobble' which cost me lots of coding hours back then.
  


Title: Re: My old ZX81 restored to full function
Post by: gertk on October 16, 2011, 08:36:37 PM
The 'special rampack' disected


Title: Re: My old ZX81 restored to full function
Post by: Seob on October 17, 2011, 07:09:00 PM
Yes the ram pack wobble of death. That was a major design flaw.
Nice to see a piece of history restored.


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on May 21, 2012, 02:05:16 PM
nice one... didn't see this topic before.

i got my zx81 composite modded the other day, because te lack of proper vsync made it near impossible to find the tv channel.
my first zx81 game release should be out soon too


Title: Re: My old ZX81 restored to full function
Post by: gertk on May 21, 2012, 08:52:27 PM
i got my zx81 composite modded the other day, because te lack of proper vsync made it near impossible to find the tv channel.
my first zx81 game release should be out soon too
Yes it can be quite a pain to get these oldies tuned on your TV, that is also why I mod every G7400 to have at least RGB and nowadays I also mod them with CVBS.

BTW How is your new ZX81 game distributed ? as WAV, MP3, K7 or on good old cassette ? :)


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on May 21, 2012, 09:08:19 PM
good old cassette & wav ;-)

There already is a small free twirldemo from 2010 available for download at www.revival-studios.com , it also includes a WAV, so you can hook it up to the real deal.  My first game "avalanche" (a version of colorclash for the zx81) is finished, so i'll start production of the cassettes soon.




Title: Re: My old ZX81 restored to full function
Post by: gertk on June 18, 2012, 07:18:55 PM
Last meeting in Maarssen I found out that the board I put into my ZX81 is a rare Issue3 board.

We did a video mod on an Issue 1 board ZX81 of a friend of mine from which he could not get a decent display on his TV (back porch problem in the older ULA chips)

After replacing the inner contents of his modulator by this small piece of Vero board he could connect it to a standard CVBS input and he's got himself a nice rock solid and clean black and white picture.

 


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on August 15, 2012, 10:44:34 AM
2 games for the ZX81 are now ready for release, with a third game currently in the making.

"Avalanche" (2011)" - A version of colorclash for the ZX81
"Mayhem (2011)" - Yup!

I've also added support for peripherals such as the ZXpand joystick interface and AY soundboards.
The games will be available on cassette tape as well as download.

If you are wondering what these games would look like on a rusty-old 4-chip ZX81? Then come visit me at the Retro gaming fair on september 9 in Deurne, the netherlands!

PS1> I am terrible at electronics so i did the qucik-n-dirty composite fix on the zx81. I get a good picture, except when loading.

PS2> I also built a raspberry-pi into a zx81 case (with the zx81 keyboard working as an actual keyboard). I might bring it for displaying videos/trailers


Title: Re: My old ZX81 restored to full function
Post by: gertk on August 15, 2012, 06:55:45 PM

PS2> I also built a raspberry-pi into a zx81 case (with the zx81 keyboard working as an actual keyboard). I might bring it for displaying videos/trailers


Damn I put a spare mbed inside a ZX81 case :) But I bet my mbed powered ZX81 beats your raspberry Pi in boot time by far :-)
I did not want to show the pictures yet..

I did this in between projects to get some special mbed routines going.
It features VGA (and optional CVBS) video output, sd card storage (FAT16/32 with LFN), joystick and PS2 keyboard all without active hardware. Speed is about 4 - 5 times original not optimized just plain C.. Oh, and you can also use the original keyboard alongside the PS2 keyboard.

Screen is mapped onto 640x240 VGA B/W output but not yet with Z80 interrupts, most programs and games work, even with UDG but your Twirl demo and some other non-UDG Hires games not yet. The (original) Basic rom thinks it is running on a ZX80 with ZX81 basic rom (always fast mode) but the VGA output is always on (note there is no real VGA output on an mbed... I use the I2S output at 25 MHz bitrate...)
Added features when using a PS2 keyboard: F1 help screen, F2 dis-assembler and F3 hexdumper/editor(not yet). You can reboot with Ctrl-Alt-Del and most of the PS2 keys like : and , . < >  cursor keys etc. are generating the correct ZX81 equivalents.

I am taking this NXP81 :-) to Maarssen this Saturday (Commodore gg)
 


Title: Re: My old ZX81 restored to full function
Post by: gertk on August 15, 2012, 08:56:35 PM
Here are some pictures..

Note: the weird horizontal line pattern at the top is coming from the mini LCD TV not from the mbed. (it is a cheap 7" China thingy)
On two other VGA inputs (bigscreen LCD TV and a 17" VGA LCD they are not there)


Title: Re: My old ZX81 restored to full function
Post by: gertk on August 15, 2012, 09:00:18 PM
and some more..


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on August 15, 2012, 09:55:15 PM
Really nice gert! Unfortuanately i cant make it to maarsen, but be sure to mention my new and upcoming games to anyone taking interest in ZX81!

I don't have photos of my pi81 atm, but it all fits nicely inside the case with composite and sound out connected, HDMI and ethernet going inwards via cables and a nice USB hub in the cartridgeport.
It all looks nice, but i am not really a linux-expert, so i just did some testing with the debian installation as well as raspbmc.

I have a seperate ZX81 with composite out, zxpand interface (SD card, 32k ram extension) and AY interface (joystick port and AY chip) for development, which i will also bring to Deurne to demonstrate my zx81 work.
The zxpand is supossed to fit a memorex expansion case, but i still need a case to fit both the Zxpand + AY interface



Title: Re: My old ZX81 restored to full function
Post by: gertk on August 15, 2012, 10:22:00 PM
Some video footage..  :) It shows only a game but about halfway I switch to 'turbo' mode and the action gets really frantic...
In the beginning you can see the sdcard fileselector which uses the full 640x240 resolution.

YouTube: http://www.youtube.com/watch?v=2Q1VQDkFSwI


Title: Re: My old ZX81 restored to full function
Post by: gertk on August 15, 2012, 10:32:55 PM
Really nice gert! Unfortuanately i cant make it to maarsen, but be sure to mention my new and upcoming games to anyone taking interest in ZX81!

I will do some advertising. Do you use special graphics stuff (HiRes) in those games or is it DisplayFile with standard characters based ?

Quote
I don't have photos of my pi81 atm, but it all fits nicely inside the case with composite and sound out connected, HDMI and ethernet going inwards via cables and a nice USB hub in the cartridgeport.
It all looks nice, but i am not really a linux-expert, so i just did some testing with the debian installation as well as raspbmc.

I did get my raspberry pi a month ago but only tried some small things, I also have the Debian install on a 4GB sd card and it runs ok just takes forever to boot...

Quote
I have a seperate ZX81 with composite out, zxpand interface (SD card, 32k ram extension) and AY interface (joystick port and AY chip) for development, which i will also bring to Deurne to demonstrate my zx81 work.
The zxpand is supossed to fit a memorex expansion case, but i still need a case to fit both the Zxpand + AY interface

I don't think I'll be going to Deurne but Apeldoorn is on my list. Let us hope they have better 'power supply' than the last time..


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on August 24, 2012, 10:25:46 AM
Really nice gert! Unfortuanately i cant make it to maarsen, but be sure to mention my new and upcoming games to anyone taking interest in ZX81!

I will do some advertising. Do you use special graphics stuff (HiRes) in those games or is it DisplayFile with standard characters based ?
Displayfile based. I want it to run on stock ZX81 and have quick arcade gameplay at proper speeds. I did get some wonderful animation going which i'm really proud of in 4x6 pixels ;-) Cover art for the 2 release games are currently finished and printed and i should be receiving a high-end tapedeck this afternoon which should help produce quality tapes.

Quote

I don't think I'll be going to Deurne but Apeldoorn is on my list. Let us hope they have better 'power supply' than the last time..
Too bad. Deurne is always a good show. I'm currently looking into origanising my own show next year that will span for 2 days with a lots of new homebrew releases (not only by me), sneak previews at upcoming projects. competitions, systems to play and a retro-fair. Dedicated sections for msx, commodore, etc. Your hardware projects would fit in nicely!



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 15, 2012, 10:06:07 PM
Btw. The games are both out now, and the trailers are online for anyone interested.

avalanche -> http://www.revival-studios.com/?page=129 (http://www.revival-studios.com/?page=129)
mayhem -> http://www.revival-studios.com/?page=132 (http://www.revival-studios.com/?page=132)


Title: Re: My old ZX81 restored to full function
Post by: gertk on September 20, 2012, 07:30:13 AM
Looking very good!
I assume you have them for sale at Apeldoorn the 30th too ?



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 20, 2012, 08:51:34 AM
Yes, as well as my new ZX81 game, called: Down!


Title: Re: My old ZX81 restored to full function
Post by: gertk on September 23, 2012, 12:13:15 PM
Yes, as well as my new ZX81 game, called: Down!

Great, I will bring my NXP81 maybe we can test it on it too.


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 23, 2012, 12:30:42 PM
Yes, as well as my new ZX81 game, called: Down!
Great, I will bring my NXP81 maybe we can test it on it too.
Great, once the system is all bugfixed i'd be interest in one too ;-) Does the essentials demo work on it?

Also, the modded VP+ i bought from you has issues with the VP+ background (random garbled scanlines in the VP+ graphics), if i can find some spare room in my C3 i could bring it and give it to you. If easy to do, you can also fix composite out so i could use it on my projector.

Martijn



Title: Re: My old ZX81 restored to full function
Post by: gertk on September 23, 2012, 06:21:40 PM
Yes, as well as my new ZX81 game, called: Down!
Great, I will bring my NXP81 maybe we can test it on it too.
Great, once the system is all bugfixed i'd be interest in one too ;-) Does the essentials demo work on it?

A lot of programs work, some of the programs which use UDG work also (like HR-GALAXIAN)
The emulation so far is rock solid but not cycle perfect, I still need to implement the proper joystick routines, if I can find the time I will add ZXpand joystick emulation and maybe even sound emulation is possible.

Quote
Also, the modded VP+ i bought from you has issues with the VP+ background (random garbled scanlines in the VP+ graphics), if i can find some spare room in my C3 i could bring it and give it to you. If easy to do, you can also fix composite out so i could use it on my projector.

I will bring a working G7400 with RGB and CVBS along, we can swap them and I can repair/modify yours.



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 25, 2012, 09:51:42 AM
Quote
A lot of programs work, some of the programs which use UDG work also (like HR-GALAXIAN)
The emulation so far is rock solid but not cycle perfect, I still need to implement the proper joystick routines, if I can find the time I will add ZXpand joystick emulation and maybe even sound emulation is possible.
Sounds good! Personally i am not fond of things like UDG that only work with hardware modifications. That is the same beef i have with the msx-scene where they keep adding new and new hardware to make things into a lite-pc while still calling it msx. Additional stuff like the zxpand is fine, but it should also work on a default configuration.

Quote
I will bring a working G7400 with RGB and CVBS along, we can swap them and I can repair/modify yours.
Sounds like a plan! I really hope it is less crowded than deurne, so i have enough time to chit-chat. I do have less tables in Apeldoorn than in deurne, so also less space to cover. *fingers crossed*
 


Title: Re: My old ZX81 restored to full function
Post by: gertk on September 25, 2012, 06:47:32 PM
Sounds good! Personally i am not fond of things like UDG that only work with hardware modifications. That is the same beef i have with the msx-scene where they keep adding new and new hardware to make things into a lite-pc while still calling it msx. Additional stuff like the zxpand is fine, but it should also work on a default configuration.

Yes I also have to restrain myself adding too much stuff but then again it is all in software on the mbed (I still have no extra hardware attached to the mbed other than some resistors)

But some more details on the NXP81:

PS2 keyboard support, pressing F1 will give you the (original) ZX81 manual on screen (not quite finished yet, at the moment only text and no pictures since I can only do black and white graphics), F2 will give you a disassembler and F3 a hexdump with ZX81 characters alongside. The F1, F2, F3 and fileselector all run in 80 columns (640x240 graphics)
Also you can use the numeric keypad, and also the keys like +/= quote etc. can be entered directly.
You can use the original keyboard of the ZX81 but the 80 column screens (F1/F2/F3 and fileselector) are not accessible/usable then (yet...)

 
Quote
Sounds like a plan! I really hope it is less crowded than deurne, so i have enough time to chit-chat. I do have less tables in Apeldoorn than in deurne, so also less space to cover. *fingers crossed*

If it is anything as 'crowded' as the former event in De Matenhal then space is not really a problem, power is...  ;:)

Do you have a (spare) VGA monitor with you ? I will bring along a G7400 and my 'miniature' VGA monitor/TV and a PS2 keyboard anyway just to be sure.



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 25, 2012, 08:40:04 PM
GertK:
I only have my default 22" TFT with me which you can connect it to. If you want you can bring a regular tv for my zx81, because even a small TV is hard for me to transport (remember all my stuff needs to fit into a small C3 car ;-)

Would be great if you could add support for the old Z80-rom on your system too. Not that it is mega-useful but i always wanted some kind of switch for that on my own zx81 (talking about switches, bless the reset-switch on the Zxpand)


Title: Re: My old ZX81 restored to full function
Post by: gertk on September 26, 2012, 07:48:51 AM
GertK:
I only have my default 22" TFT with me which you can connect it to. If you want you can bring a regular tv for my zx81, because even a small TV is hard for me to transport (remember all my stuff needs to fit into a small C3 car ;-)

I will bring my 7" LCD monitor/TV, no problem, it has CVBS, VGA, YUV and aerial/RF input (unfortunately no RGB scart).

Quote
Would be great if you could add support for the old Z80-rom on your system too. Not that it is mega-useful but i always wanted some kind of switch for that on my own zx81 (talking about switches, bless the reset-switch on the Zxpand)

The NXP81 is resettable by Ctrl-Alt-Delete :-) But I need to add a true reset switch for the mbed accessible from the outside just in case...

Rom space I have plenty (512k) so adding ZX80 support is a viable option, and storage is also no problem (SD card) and that is also where the manual is stored, it is possible to add even more books. On the RaspberryPi this will be much easier as it has more RAM, a full color output etc but at the moment I started with the mbed my RaspberryPi was still in backorder.

BTW, you could do miracles on the Pi in assembler  :D





Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on September 26, 2012, 10:39:32 AM
To be honest i am very dissapointed with my PI, it is way to slow to run anything useful at decent speed (xbmc, any other program that needs a slight bit of resources) and at least in theory this should be the case.

I am not at all a linux guy so i need to find a way to either install a different OS, or a linux install that doesnt need a bloathed web of other sourcecodes to compile each program (because of the way linux is setup even things likeunbuntu feel extremely bloated). I mean i programmed the GBA when i was still making games for a living, so something like a minimal MENU2X with a set of ARM-binaries would be ideal (at least with a gp2x/dingoo native i didnt need to deal with any of that linux bs).

Without the intention of offending anyone, but to me Linux is like a badly stacked tower of interweavved bricks, and you better not move or alter one or the thing will fall apart, so just add another brick on top then eh?

To be fair, OSX = Beos with fancy desktop. Windows is extremely ineffecient, used to be very unstable (i must say i have little troubles with stability of windows7) but easy to use and all closed source, so no 'prutsers' can f*&k it up.

A minimal-OS for a fixed config like the PI would be ideal (i believe sony laptops had a minimal OS with cross-media-bar in a few MB rom once). Give me a C-compiler the memory address of my keyboard, usb inputs, videomemory and soundbuffer an i am good to go.

The best thing about my pi is that it sits in a zx81 case (catching dust), i cant even have it just run a ZX81 emu (or other emus) so at least it has something to do :-(
I have all my hopes on the Ouya now. Too bad it uses android/java (essentially you are writing in an emulated environment) so they throw away about 40% of CPU power right there, but fingers crossed. The thing IS dual core so hopefully the one core left will be enough to make some decent sh*t on.



Title: Re: My old ZX81 restored to full function
Post by: gertk on September 26, 2012, 07:00:58 PM
Yeah the RaspberryPi is in serious need of a native OS and programming toolkit.
I love Linux, use it at the office and at home but it is just way too much overhead on that CPU.
I programmed the mbed (ARM Cortex M3) in assembler for the Videopac rom emulator and it just flies (10 ns instructions...) So if I translate that to the Pi at 700 Mhz..  ;:)
Another hurdle in the Pi is the fact that the information on the GPU is not open (yet).

There are rumours that BBC basic is ported to the Pi (native) and then it would be great if it would support the inline assembler like the CP/M and 6502 versions did. I can not imagine how fast that would run.


Title: Re: My old ZX81 restored to full function
Post by: gertk on October 01, 2012, 08:33:55 PM
Did a bit of SM yesterday: I load-ed up 'Down' from tape into an original ZX81...  :D

7 minutes of keeping my fingers crossed until it started up nicely. I bought two cassetterecorders at Apeldoorn, a Philips NMS1515 and a Slipstream but only with the Slipstream the game would load up fine. The nice looking Philips NMS1515 did not have enough 'output', after three attempts to get 'Down' loaded I switched over to the Slipstream recorder (Found out that it has no volume control at all, and no speaker but it said on the bottom: For the Spectrum computer so at least I was 'keeping it in the family') and it went OK the first time.

Great game by the way, highly playable even with the ZX81 keyboard.


Title: Re: My old ZX81 restored to full function
Post by: gertk on October 08, 2012, 08:59:54 PM
Added a ZXpand compatible joystick function to the NXP81 and it works great with Down and Stairrunner !

YouTube: http://www.youtube.com/watch?v=FTVhCxvLi2c


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on October 08, 2012, 09:53:30 PM
Added a ZXpand compatible joystick function to the NXP81 and it works great with Down and Stairrunner !
Nice game! Wish i could play it on my videopac!  ;)


Title: Re: My old ZX81 restored to full function
Post by: gertk on October 08, 2012, 11:03:41 PM
Added a ZXpand compatible joystick function to the NXP81 and it works great with Down and Stairrunner !
Nice game! Wish i could play it on my videopac!  ;)

Hehe...  :)  Maybe an idea for an 'all plus mode' game ?


Title: Re: My old ZX81 restored to full function
Post by: gertk on October 09, 2012, 06:26:01 PM
Come to think of it: Down might be possible as you can scroll the plus screen!


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on January 13, 2013, 06:16:35 PM
Down! for the ZX81 got reviewed in the January 2013 issue of Retro Gamer Magazine and score a whopping 82% !!!! (just a whee bit short of this month's Retro Sizzler award).

A version for the videopac is in the works, planned for Q3-2013 release.


Title: Re: My old ZX81 restored to full function
Post by: Janzl on January 13, 2013, 09:06:20 PM
Congrats!  8)


Title: Re: My old ZX81 restored to full function
Post by: gertk on January 14, 2013, 07:58:32 AM
Quote
Down! for the ZX81 got reviewed in the January 2013 issue of Retro Gamer Magazine and score a whopping 82% !!!! (just a whee bit short of this month's Retro Sizzler award).

Nice work!

BTW I have added ZX80 emulation to the mbed NXP81 (and I scored a real ZX80 on marktplaats!)
There are some so-called 'flicker free' games for the ZX80, maybe you can port the ZX81 games to the ZX80 too.



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on January 14, 2013, 10:22:57 AM
No ZX80 porting for me, it would take too much fiddling getting the exact timing each vblank.

Besides, there are about 3 active zx80 users worldwide (not that commodore PET is any better, but at least it was easier for me to work on after my VIC20 stint).


Next ZX81 will be "Shifted" , a nice/unique puzzlegame concept that is very addicting (and one of the titles i will release for android/etc. later this year).

PS> Congrats on the ZX80 score btw.


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on March 17, 2013, 10:36:58 AM
(http://www.revival-studios.com/media/zx81runner.png)


Title: Re: My old ZX81 restored to full function
Post by: gertk on March 17, 2013, 11:10:08 AM
(http://www.revival-studios.com/media/zx81runner.png)

Available in Apeldoorn ?

BTW do you still need a Composite video cable for the Videopac G7400 ?
If so I can bring one.



Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on March 17, 2013, 01:00:06 PM
(http://www.revival-studios.com/media/zx81runner.png)

Available in Apeldoorn ?

BTW do you still need a Composite video cable for the Videopac G7400 ?
If so I can bring one.
Its one of 3 games in development for 2013 for the ZX81.
The first one available is Shifted (out in apeldoorn). A great fun and addictive game but that isnt as cool a screenshot as this one.

The third one is a boxing game, also with nice graphics (there is a bunch of large animated characters in there, so it will be a big squeeze getting it into the available space).




Title: Re: My old ZX81 restored to full function
Post by: gertk on March 17, 2013, 06:26:27 PM

Its one of 3 games in development for 2013 for the ZX81.
The first one available is Shifted (out in apeldoorn). A great fun and addictive game but that isnt as cool a screenshot as this one.

The third one is a boxing game, also with nice graphics (there is a bunch of large animated characters in there, so it will be a big squeeze getting it into the available space).

It looks good, I definitely want it both on tape and binary  :)
Does it have ZXpand/ZonX sound support ?

I have been playing with a  AY-3-8910 emulator addon (ported from a piece of code for the Parallax Propellor!) on my NXP81 and it already gives out some sounds (both with a demo and Mayhem/Avalanche/Stairrunner/Down).
Dennis (DDW) tested your ZX81 games with a real ZONX and it gave no sound.. Seems there was an IO address mixup on the real ZonX  (0x0F/0x1F and 0x0C/0x1C) It has something to do with A4 not properly connected on some ZonX boxes. I had to adjust the emulator to also react on both variations.

If all is well we will attend Apeldoorn with a bunch from Steenwijk  :)

P.S. do you take the PET game(s) also to Apeldoorn ? (just for fun I tested a 6502 emulator on the mbed and used the PET as example code to see how it would run and the bootup screens already showed up so..)



Title: Re: My old ZX81 restored to full function
Post by: Janzl on March 17, 2013, 09:59:36 PM
(http://www.revival-studios.com/media/zx81runner.png)

What game is this? Canabalt?


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on March 18, 2013, 10:50:55 PM
(http://www.revival-studios.com/media/zx81runner.png)

What game is this? Canabalt?
Indeed it is a runner-type game which combines the coin-collecting of temple-runner with the on ZX81 unavoidable visual-style of canabalt.


Title: Re: My old ZX81 restored to full function
Post by: Janzl on March 18, 2013, 10:54:43 PM
Oh it's one of your games oops  :-[

I dont think this one will make it to the G7000.  ;)


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on March 18, 2013, 11:54:57 PM
Oh it's one of your games oops  :-[

I dont think this one will make it to the G7000.  ;)

Probably not, most of the zx81 stuff for 2013 is questionable if it will make over on things like pet/vic20 as well given they are a bit more complex / heavy on resources.

  Martijn


Title: Re: My old ZX81 restored to full function
Post by: gertk on March 20, 2013, 01:54:43 PM
Canabalt looks good on the BiTT  ;)


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on March 20, 2013, 03:18:08 PM
Canabalt looks good on the BiTT  ;)
hehehe... Thanks!  :)


Title: Re: My old ZX81 restored to full function
Post by: Seob on October 06, 2013, 02:28:40 PM
Martijn are you still searching for a b/w tv for you're zx81? I know where i can find a nice small philips portable tv, with i guess a 10" inch screen for 7,50 euro.
Let me know if you're intrested, i will pick it up.


Title: Re: My old ZX81 restored to full function
Post by: revivalstudios on October 06, 2013, 10:39:54 PM
Thanks for the heads up, but this one looks too brownish/beat-up for my taste.. I saw a nice phillips mini-tv with nice black flat display once, but the guy selling it didn't respond :-(


Title: Re: My old ZX81 restored to full function
Post by: Seob on October 06, 2013, 11:19:30 PM
It's not this unit, but it looks like this one. Just picked the photo from the internet. Haven't looked at the tv that well to see it's condition.