Search found 5 matches

by shock__
Mon Dec 28, 2020 7:19 am
Forum: WANTED
Topic: TK95
Replies: 0
Views: 1801

TK95

I know it's a bit of a far shot regarding the primary focus of this forum, but hey ... it's worth a try considering a number of south american users seem to be present here.

In case anyone of you has such a computer for sale I'd be glad to recieve any offers.
by shock__
Mon Dec 28, 2020 7:07 am
Forum: Hardware
Topic: Internal AY-8912, has anyone tried it?
Replies: 16
Views: 1405

Re: Internal AY-8912, has anyone tried it?

How much height does the original ZX81 case have left for the CPU socket? On an Issue One it should be possible to add a pretty daughterboard if you have ~15mm left (or less if you solder in the CPU and solder the daughterboard directly on top ... or none at all if you design a daughterboard that re...
by shock__
Fri Feb 03, 2017 12:17 am
Forum: Hardware
Topic: Lambda colour kit
Replies: 30
Views: 71492

Re: Lambda colour kit

I guess this qualifies as working? http://i.imgur.com/l9SuYyv.jpg No idea what exactly fixed it ... I added a 1K variable resistor in the footprint set for one (previously hardwired with a fixed resistor) and replaced the orange trimable capacitor (which broke) with a yellow one (too lazy to look up...
by shock__
Thu Feb 02, 2017 4:32 pm
Forum: Hardware
Topic: Lambda colour kit
Replies: 30
Views: 71492

Re: Lambda colour kit

Crystal is fine, schematic here: http://forum.tlienhard.com/TS1000/www.user.dccnet.com/wrigter/misc/lambdacolor.gif Back to the ZX81 it is for me it seems ... while the picture is fine on the Sony PVM it gives me a solid white screen on the Bravia LCD. Building the back porch/level addon (once again...
by shock__
Thu Feb 02, 2017 2:20 pm
Forum: Hardware
Topic: Lambda colour kit
Replies: 30
Views: 71492

Re: Lambda colour kit

Forgive me the thread necromancy, but I was gifted such a device yesterday and have a few questions ... First of all it appears the interface does work in general when used with a 16K RAM expansion (DIY, SRAM based, WRX enabled) in that I can initialize the color mode (random attributes shown), over...