Search found 245 matches

by McKlaud
Wed Jan 23, 2019 10:46 pm
Forum: Hardware
Topic: Jupiter Ace - Case Dimensions
Replies: 17
Views: 2072

Re: Jupiter Ace - Case Dimensions

I will have an access to the Juppie in a few weeks. I will try to take some measurements and draw a sketch.
by McKlaud
Sun Jan 20, 2019 11:10 am
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 83
Views: 15656

Re: Jupiter ACE (again)

The RAM module tested and been working fine for a while but now proven: RAMtest
by McKlaud
Thu Jan 17, 2019 9:07 pm
Forum: Software
Topic: [ACE] acetapdir
Replies: 1
Views: 902

Re: [ACE] acetapdir

Tygrys, thanks for sharing and yes, I can be "blamed" for your hard work :mrgreen:

Regarding a Jupiter ACE software library, have a look into TOSEC Collections via google.
by McKlaud
Fri Jan 11, 2019 12:33 am
Forum: Software
Topic: [ACE] Hello World Demo
Replies: 0
Views: 945

[ACE] Hello World Demo

Demo ported from ZX81 to Jupiter ACE: Hello World on Jupiter ACE - demo by speccy.pl :mrgreen:
by McKlaud
Tue Dec 25, 2018 4:24 pm
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 83
Views: 15656

Re: Jupiter ACE (again)

A sample tones (noises) generated by the AYchip:Noise in 3 channels

And words in the 4th for their generation:
Image
by McKlaud
Sun Dec 23, 2018 10:30 am
Forum: Welcome Area
Topic: Merry Xmas and Happy Holidays
Replies: 9
Views: 2533

Re: Merry Xmas and Happy Holidays

All the best to all of you.

Martin, beautiful graphics.
by McKlaud
Sun Dec 23, 2018 1:42 am
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 83
Views: 15656

Re: Jupiter ACE (again)

New toy arrived just before Xmas holidays. This time a simple AY chip interface with the 96K RAM module on a single board. AY chip uses the same ports (65533 & 49149) like in ZX Spectrum 128K. Anyway I am not a musician and can do simple shot sounds only but I am happy that it works.
by McKlaud
Wed Dec 19, 2018 10:38 am
Forum: Hardware
Topic: Issue 4B Spectrum with dot crawl in black and white
Replies: 13
Views: 1907

Re: Issue 4B Spectrum with dot crawl in black and white

Any ceramic caps (single or multilayer) are good for this application. Don’t use tantal or electrolytic ones.
by McKlaud
Wed Dec 19, 2018 9:25 am
Forum: Hardware
Topic: Issue 4B Spectrum with dot crawl in black and white
Replies: 13
Views: 1907

Re: Issue 4B Spectrum with dot crawl in black and white

220nF would be sufficient. This is not an issue with the capcistance only. In this application the main factor is ability to fast charging and discharging of these caps. So, the ESR would play the main role.
by McKlaud
Mon Dec 17, 2018 8:46 am
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 83
Views: 15656

Re: Jupiter ACE (again)

Jupiter ACE is not popular like ZX81. Please bear in mind that there was sold no more 10,000 units of Jupiter ACE in 80-ties. A few more replica PCBs in recent years do not make any difference. I would not be surprised if SirMorris said 'no'. Regarding the memory map, the partial address decoding of...