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by Icky
Wed Oct 16, 2019 8:58 pm
Forum: MONGREL H4 USER BUILDS
Topic: PhilC's H4 Mongrel edition build x 3
Replies: 16
Views: 418

Re: PhilC's H4 Mongrel edition build x 3

How’s the prep work going PhilC. I see derkom has started gathering components. I think this is going to be another epic adventure :)
by Icky
Wed Oct 16, 2019 12:32 pm
Forum: MONGREL H4 USER BUILDS
Topic: derkom's attempt
Replies: 3
Views: 180

Re: derkom's attempt

A little mouse(r) dropped off some goodies today... Hopefully the BOM doesn't change too much between now and build time (yes, I did fix the missing SILs). I needed some other items to finish off a couple of monitor projects, so decided to go ahead and get ready for the H4. Nice. The prep going on ...
by Icky
Tue Oct 15, 2019 5:14 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: STFM Keyboard Remake
Replies: 35
Views: 2848

Re: STFM Keyboard Remake

PhilC wrote:
Tue Oct 15, 2019 4:47 pm
i don't like the colour :P
Typical, I had a 1 in 3 chance of picking a particular colour for the test and I chose the one you don't like :lol:
by Icky
Tue Oct 15, 2019 3:58 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: STFM Keyboard Remake
Replies: 35
Views: 2848

Re: STFM Keyboard Remake

Finally got the LED, Switch and Key all assembled to see if it all works.

IMG_4466.jpeg
IMG_4466.jpeg (34.53 KiB) Viewed 64 times
by Icky
Tue Oct 15, 2019 11:15 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 228
Views: 29377

Re: BLITTER RE-CREATION THOUGHTS

Just thought I would share some videos of the FPGA Blitter Board running using the stock code at different clock speeds and the effects it has.

Running @ 8MHz



Running @ 16MHz



Running @ 32MHz

by Icky
Mon Oct 14, 2019 9:03 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 228
Views: 29377

Re: BLITTER RE-CREATION THOUGHTS

exxos wrote:
Mon Oct 14, 2019 8:58 am
Icky wrote:
Mon Oct 14, 2019 8:53 am
True, haven't had my caffeine this morning. Although the FPGA board is 3.3v so will need a 5V <-> 3.3v buffer for that line.
You may find by the time the shifter is loaded, and go via a 33R that you may well end up with 3V output on it anyway.
I’ll take a look tonight :)
by Icky
Mon Oct 14, 2019 8:53 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 228
Views: 29377

Re: BLITTER RE-CREATION THOUGHTS

exxos wrote:
Mon Oct 14, 2019 8:27 am
Yeah, but sounds more work than bodging a osc onto the shifter...
True, haven't had my caffeine this morning. Although the FPGA board is 3.3v so will need a 5V <-> 3.3v buffer for that line.
by Icky
Mon Oct 14, 2019 7:56 am
Forum: ALPHA DEVELOPMENT INFO
Topic: STFM Keyboard Remake
Replies: 35
Views: 2848

Re: STFM Keyboard Remake

MasterOfGizmo wrote:
Mon Oct 14, 2019 7:44 am
keli wrote:
Mon Jul 22, 2019 5:39 pm
How are you going to do the controller?
The IKBD has been implemented in HDL and a small FPGA or a big CPLD could be used to get 100% compatibility without the need to source HD6301's. See https://github.com/harbaum/ikbd.
Thanks for the info / pointer. Will take a look.
by Icky
Mon Oct 14, 2019 7:54 am
Forum: ALPHA DEVELOPMENT INFO
Topic: STFM Keyboard Remake
Replies: 35
Views: 2848

Re: STFM Keyboard Remake

Just a small interjection from me for new keyboard and new case projects: If the joystick ports on the underside of the keyboard PCB would be turned to face the right side of the case and be accessible from the outside, that would be way nicer than having to fiddle below the machine to change plugs...
by Icky
Mon Oct 14, 2019 7:45 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 228
Views: 29377

Re: BLITTER RE-CREATION THOUGHTS

Damn. Maybe we should bodge on a 32mhz osc into the shifter and run the same clock to the FPGA board ? It could just not like out of sync clocks... Or I could mod my STF Remake Alpha to accept the FPGA Blitter and use the 16MHz mod to put everything back to stock 8MHz and feed the Blitter the 32MHz...

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