kodak80 blog

[kodak80]

I had a stash of Fujitsu MBM27C1000A 1mbit UV EPROMs I purchased a while ago and found that my TL866II programmer did not have listed. Rather than throw them away as no one wanted to buy them from me, I held onto them.

I decided that I wanted to try using these in my STE instead of the usual 27C010 chips so that I would not need to change the W102, W103 and W104 jumpers when they were set for 28 pin TOS ROMs.

I have therefore created an adapter board that maps the 27C1000 to 27C010 which has allowed me to then program them as 27C010 in my programmer.

27C1000_to_27C010_Adapter_Board.jpg

I made up one of the PCBs and it worked. 2 x 27C1000 chips programmed with TOS 2.06 (HI/LO) and inserted into one of my STEs which previously had v1.62 28 pin mask ROMs. I have also loaded EmuTOS 0.9.12 into a couple of the 27C1000 chips and this also works fine in the STE.

27C1000_STE.jpg

27C1000_STE_Jumpers.png

[kodak80]

I haven't posted in a while but have been keeping busy.

Projects completed:

DIP based PIC16F628 USB mouse adapters and I am working on the SMD version which is shorter in length

IMG_5693.jpg

Raspberry Pi MT-32 emulator up and running with my own designed midi hat to test the music from the Scumm-VM Lite games released by @agranlund Hat has a pre-purchased PCM5102 I2S Interface DAC soldered in and also works great. Music out from MI2 sounds awesome. Based on the MT32Pi project here: https://github.com/dwhinham/mt32-pi

IMG_5699.jpg

[kodak80]

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/wik ... ol-surface

[DoG]

Really nice project with the MT32. Got inspired so I have order all the parts for a MIDI PiHat. Going to use it on a Pi3 A+. Seems pretty straight forward.

[kodak80]

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 when installed into a case. The SYNTH and ROM.FONT buttons would also need to be added onto the separate board as well but can be mounted on the hat PCB.

The MT32-pi configuration file needs the buttons enabling before they will work, but once enabled, you have volume control and can switch between MT32 and FluidSynth.

Testing so far has worked fine with a rotary encoder and the buttons. :D

[kodak80]

Built up 3 of these UniJoyticle2 (revision B) adapters and connected an old Wii controller over Bluetooth and tested it on my 800xl. I can report back that these work well.

revision D of the PCBs onwards provides power through the 9 pin joystick port but the ones I built need 5v through the USB port or the power pot.

UniJoysticle2.jpg

https://github.com/ricardoquesada/unijo ... atarist.md

[kodak80]

Atari ST ATX board is mostly built now and it was powered up this morning...

I am pleased to say it worked first time and TOS 2.06 booted up and showed 4mb RAM tested. TOS 1.04 also booted when jumpers were changed on the board.

I am still waiting on the PIC chips for the Eiffel and also the PS2 connector for the keyboard and mouse.

Other components still on the way here are: ISA socket, CF card IDE adapter.

IMG_7540.jpg

[kodak80]

ATX board now has the PS2 socket fitted but I ordered the wrong PIC chips for the eifel code. I ordered PIC16F872 and they should have been PIC16F876. Have now ordered some PIC16F876 chips and have to wait for them to arrive as there are none local I can buy.

Have also built up a second ATX board to the same level as the first one and this is also alive and booting. Ran the Closure demo from floppy to test things and it worked fine. :D

[PhilC]

@kodak80 i must get my hands on one of the ATX boards.

They look pretty easy to build and the ISA slot is a great addition.

[HigashiJun]

Did you get this ATX board from the guy making it in Poland ?