H5 B1 (AU03) now fully built and working. Still need to sort out the 16mhz clock to the 1.44mb GAL so have left off the OSC for now and have not yet tried the solder jumper to feed 16mhz from the Shifter. Exxos IDE board mounted with EmuTOS 1.0 booting and MI2 runs in this one as well as AU02 board ...

H5 B1 (AU02) board all built now and ready for its new owner. This one is going to a member of the local Atari retro group and he is looking forward to getting his hands on it.

First two H5 B1 boards have been successfully booted to TOS after the build photos below were taken. AU01 board: IMG_5967.JPG AU02 board: IMG_5966.JPG I have pretty much finished populating AU02 board since the photo above was taken, with the exception of the ACSI internal headers, the 16mhz OSC for...

My latest boards arrived yesterday from PCBWay based on this revision: MT-32v2.5-I2C-OLED-full-buttons-routed(PCBWay)-top.png I have re-organised the layout of my hat to fit the buttons and rotary header. The OLED and rotary headers on the left are to allow having these mounted on a separate board w...

Having hit problems with the A3 board reset, I figured it would be better to build these first and get them working so I have started to assemble the components onto the three B1 boards. Will see how these go.

exxos wrote: ↑Fri Jan 22, 2021 10:08 pm

kodak80 wrote: ↑Fri Jan 22, 2021 10:00 pm I have a question regarding SMD resistor network (RN) components. Does the orientation of SMD RN on the H5 boards matter?

Nope, they are just single resistors in a "pack of 4".

Okay, good to know. Thank you.

I have put aside the A3 board for now and started to build my three B1 boards up.

I have a question regarding SMD resistor network (RN) components. Does the orientation of SMD RN on the H5 boards matter?

Have done a new version on my MIDI hat with DAC and OLED display for the Raspberry Pi and MT-32 pi MIDI hat.jpg MIDI hat (with DAC).jpg MIDI hat (with DAC and OLED).jpg As of version 0.8.0 of MT-32 Pi, I now need to look at adding some buttons: https://github.com/dwhinham/mt32-pi/wiki/Control-surface

IC22 was soldered in as shown previously which was confirmed as the correct orientation: https://www.exxosforum.co.uk/forum/download/file.php?id=15655 and yes, have the Flashy socket jumpered: flashy-jumper.jpg Was also wondering if I had not cut the track under IC6 properly and this was still conne...

H5 A3 board #1 powered on with diagROM in socket... Reset switch does not seem to cause board to reset. Switch itself is working (5v/0v) but board shows no sign of reset. Output to screen is a white screen. I did get DiagROM to boot once and show the menu so I had life once and reset switch seemed t...