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Lambda 8300/Power 3000 Mutlirom
Posted: Tue Nov 06, 2012 8:58 pm
by sascha2000
Hello,
after a long time of absence I had little time to solder a Multirom PCB for my Lambda.
The following ROMS are currently burned:
Lambda 8300 ROM modified ZX81 compatible.rom
Lambda 8300.rom
Power 3000.rom
Power 3000 ROM with colour kit commands.rom
Just have a look here, its in german however pictures should be clear.
http://forum.tlienhard.com/phpBB3/viewt ... ?f=2&t=783
Regards
Sascha
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Tue Nov 06, 2012 11:23 pm
by RWAP
I'm glad to see the Lambda came in useful !!
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Wed Nov 07, 2012 8:55 pm
by sascha2000
Hello,
we are currently discussing in the german forum, if should produce a small quantity of PCBs, about 4-8. (Even more could be produced, which may not be realistic
)
If we get 8 orders price would be about 8€ +shipping per pcb (estimated), if we only get 4 orders price would be about 13€ +shipping.
The PCB would come without any component (Eprom, etc) and must be soldered manually by the buyer. Of course if needed I can sell the parts, I have some in my storage. Price would become pretty fair.
Is someone here who would be interrested?
If enough persons will reply, I will finish the layout and perform an exact calculation and show photos here in the forum. If then all still agree I will produce the boards.
Additional ideas to be discussed:
Sbetamax suggested to have a flip flop counter for selecting the ROMs. So only one external pushbutton would be enough to change roms on the fly.
Regards
Sascha
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Wed Nov 07, 2012 9:46 pm
by iturbez
I don't speak German...
Could you explain what Lambda is?
Thaks in advance.
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Thu Nov 08, 2012 9:18 am
by sascha2000
Hello iturbez,
its a ZX81 clone from Hong Kong.
Just have a look here:
http://k1.dyndns.org/Vintage/Sinclair/8 ... ng%20Kong/
Regards
Sascha
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Thu Nov 08, 2012 9:53 pm
by sascha2000
Hello,
I got now from 4 ZX-TEAM members the feedback that they want to purchase such a MultiRom PCB.
So I'll start this project now. The progress I will document here in this thread.
Regards
Sascha
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Thu Nov 08, 2012 10:19 pm
by iturbez
Thank you very much for the info, sascha2000...
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Wed Nov 14, 2012 9:52 am
by sascha2000
UPDATE:
I have now a working proto. Now we go in the following direction:
* Use Lambda Keyboard + Reset button to change the ROM configuration. Soldering needed.
* Optional use external switches to change the ROM configuration. No soldering needed.
* Design it in a way to remain ZX81 compatible.
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Thu Nov 15, 2012 12:36 am
by 1024MAK
Hi Sascha
I would be very interested in buying a PCB.
If it is possible and practical to build a working unit, consider this a firm order
Please keep us informed. Once it comes time for the money, let me know and then we can sort out payment details.
Mark
Re: Lambda 8300/Power 3000 Mutlirom
Posted: Thu Nov 15, 2012 11:26 pm
by sascha2000