Search found 452 matches

by gozzo
Mon Jul 10, 2017 3:03 pm
Forum: Hardware
Topic: Something for Moggy... ( and probably lots of others )
Replies: 37
Views: 11789

Re: Something for Moggy... ( and probably lots of others )

my chr$16 mod doesnt use any of the zx81's ram, as it has its own ram to store the 'bitmaps' so should work with ANY or even no add on ram if i can find the circuit i drew up a few years back i'll post it here, somewhere..never got round to building it but i think 'in theory' it should work...
by gozzo
Mon Jul 10, 2017 12:27 pm
Forum: Hardware
Topic: Something for Moggy... ( and probably lots of others )
Replies: 37
Views: 11789

Re: Something for Moggy... ( and probably lots of others )

ooh, will it work with 'normal' ram expansion or only work with zxpand? i was trying to work out a 'programmable' version of wilf righters chr$16 external thingy, and think i've got it, but as theres software that uses the dk tronics system, maybe thats better...OR does it work the same way? changin...
by gozzo
Mon Jul 10, 2017 12:20 am
Forum: Hardware
Topic: Fuller FD42 Keyboard
Replies: 67
Views: 29446

Re: Fuller FD42 Keyboard

ooh, my 'work in progress zx81 in fuller case with possible internal zxpand'... i STILL havent finished that !!
by gozzo
Thu Jun 22, 2017 3:58 pm
Forum: Software
Topic: Interesting print out
Replies: 20
Views: 10569

Re: Interesting print out

and from the address used for the 'font file' , written for a 16k machine...
by gozzo
Thu Jun 22, 2017 3:56 pm
Forum: Software
Topic: Interesting print out
Replies: 20
Views: 10569

Re: Interesting print out

100% certain its for a spectrum , not only because of read data and restore statements, but the lower case letters and use of the poke to change character font !
by gozzo
Wed Jun 21, 2017 12:40 pm
Forum: Hardware
Topic: Simple UDG?
Replies: 7
Views: 3081

Re: Simple UDG?

aha, i worked out a possible way of doing that with wilf rigters external chr$ circuit, making it 'programmable', i never got round to building the thing to try it, if i can find the circuit (rough hand drawn) i'll scan it and post it here...
by gozzo
Sat Jun 17, 2017 9:02 pm
Forum: Hardware
Topic: Create ULA for €5?
Replies: 84
Views: 33140

Re: Create ULA for €5?

in that case maybe one or two at the most.... bit misleading title...
by gozzo
Sat Jun 17, 2017 6:05 pm
Forum: Hardware
Topic: Create ULA for €5?
Replies: 84
Views: 33140

Re: Create ULA for €5?

whoah, definitely interested in a few if they can genuinely be sold for around 5 euro/pound or whatever!!!
by gozzo
Thu Jun 08, 2017 4:45 pm
Forum: Hardware
Topic: Vertical bands on screen
Replies: 10
Views: 3662

Re: Vertical bands on screen

your machine has the earliest ula and this is lacking the 'back porch' part of the signal, so WILL give poor dark picture on a colour tv, even if its perfectly ok... it will usually be ok on a black & white set..the zxvid or zxccb will cure it by adding the back porch..dont worry too much about the ...
by gozzo
Thu Jun 08, 2017 4:43 pm
Forum: Hardware
Topic: Vertical bands on screen
Replies: 10
Views: 3662

Re: Vertical bands on screen

£28 each is far too expensive, especially as they are not fully tested and seller wont give refund if found partly duff..