Search found 134 matches

by mhudson52
Tue Jun 11, 2019 10:09 pm
Forum: SALES
Topic: ZX80 kit for sale
Replies: 0
Views: 1225

ZX80 kit for sale

I have decided to part with the untouched ZX80 replica kit I purchased last year from Oricfan on Ebay. It is in as-received condition.

Price is $125 USD plus shipping. Does not include case or power supply.
s-l1600.jpg
by mhudson52
Sat Feb 16, 2019 2:31 am
Forum: Development
Topic: ZX Printer Belt
Replies: 132
Views: 32527

Re: ZX Printer Belt

Yes, the printer I recently purchased came from there. Some evil unseen force coerced me into opening it up to have a look-see at the belt Ian is using. This, of course, voided the warranty, but all in the name of science, right? Dimensionally they are for all practical purposes identical. I don't k...
by mhudson52
Fri Feb 15, 2019 1:50 am
Forum: WANTED
Topic: Looking foir a TS1500
Replies: 7
Views: 1763

Re: Looking foir a TS1500

by mhudson52
Fri Feb 15, 2019 1:47 am
Forum: Development
Topic: ZX Printer Belt
Replies: 132
Views: 32527

Re: ZX Printer Belt

Hey Vopni. Thanks for the complements. Yes, a lot of time and effort have gone into this project and none of it could have been possible without the help and information from a lot of great folks on the forum. Standing on the shoulders of giants, as it were. I don't have them for sale yet due to a c...
by mhudson52
Sun Dec 02, 2018 8:53 pm
Forum: Hardware
Topic: 3K Rampack issues
Replies: 16
Views: 3206

Re: 3K Rampack issues

Yes, the 74LS138 was fitted. I'l try your suggestion using only one RAM chip at a time in those locations.

Then I'll probably just sob quietly to myself over in the corner.

Mike
by mhudson52
Sun Dec 02, 2018 5:24 pm
Forum: Hardware
Topic: 3K Rampack issues
Replies: 16
Views: 3206

Re: 3K Rampack issues

Hey Mark. Yeah I probably mis-named the 74LS138 1 of 8 Decoder / Demultiplexer IC as a "timer" chip out of my abundant ignorance. Thanks for the info on addressing schemes on the machines. That's good stuff I am trying to digest. The TS edge connector has little wear and is clean. Plugging my ZXpand...
by mhudson52
Sat Dec 01, 2018 2:21 pm
Forum: Hardware
Topic: 3K Rampack issues
Replies: 16
Views: 3206

Re: 3K Rampack issues

Mark, I just received a fresh batch of 2114N-2 chips and tried them on the board both fully populated and in pairs as shown in the drawing you posted. Still no joy. Also tried having only the timer chips installed. Got "K" prompt with one and nothing on the other. So I went back over all the connect...
by mhudson52
Fri Nov 30, 2018 1:39 am
Forum: Development
Topic: ZX Printer Belt
Replies: 132
Views: 32527

Re: ZX Printer Belt

For the truly adventurous, here are the .STL and .gcode files for the belt with no posts. It is up to the user to implement a method to attach the styli. I will be happy to assist in any way. Like the previously posted file for the belt with the integrated stylus mounting posts, these files are also...
by mhudson52
Thu Nov 29, 2018 7:21 pm
Forum: Development
Topic: ZX Printer Belt
Replies: 132
Views: 32527

Re: ZX Printer Belt

Finally re-posting the .STL file in ZIP form for the ZX printer belt with the stylus mounting posts. It is passworded, so those wanting to use will need to PM me for the password. I am doing this to restrict access to those who have been of such great help in the development of this project, so plea...
by mhudson52
Thu Nov 29, 2018 2:51 am
Forum: Development
Topic: ZX Printer Belt
Replies: 132
Views: 32527

Re: ZX Printer Belt

Mark, That is an excellent suggestion I hadn't considered as a means of controlling access. I want to share among you guys who have been so incredibly helpful while being selective at the same time. This solves that problem nicely. MaFli, Apparently great minds must think alike! You are doing someth...