Cyao

Got my Icepi to interface with a Raspberry Pi Zero 2 W! Yay

wvefffffffffffffffffff idc abt this proejct anymore the bot is just f annoying

Tried to build next186 for the icepi, but failing miserably...

I'll push it up for later ig
https://www.crowdsupply.com/icy-electronics/icepi-zero

Aaaaaaaaaaaaand Oberon is ported over!

Oberon an TUI OS developed in the 80s by ETHZ! And it's now on Icepi Zero!

https://www.crowdsupply.com/icy-electronics/icepi-zero

Made a comparison table for the Icepi Zero! Result: The icepi is superior in many aspects ;p

Published v1.4! Now with sound, support for 1.21.5-1.21.8 also added!
We have also broken 60k downloads total! (50k on modrinth, 20k on curse!)

Okay I've improved the stability of the sdram by making the skew rate slow.
I've also patched up the SDRAM's data lines to be less curved

Guess what, I still am debugging... Soldered on a 0402 100n capacitor and the stability seems a bit better now.

I have no idea why this is happening...

Lately I've done quite a bit of advertising on twitter, mastedon, snapchat, reddit etc.

I am also getting a quote from elecrow & pcbway!

At the same time I'm porting new emulators onto the Icepi Zero :)

Subscribe at https://www.crowdsupply.com/icy-electronics/icepi-zero!

Now I've ported the Acorn Atom to the Icepi Zero!

Icepi Zero is also on crowd supply!!! https://www.crowdsupply.com/icy-electronics/icepi-zero (Go subscribe :P)

I've played around even more with the fpga nes emulator, and it seems that the sdram shift is the problem. I've tested from 0 to 360 deg shift, and 70 degs seems the best - now I've got this thing:

Been trying to port nes and minimig without success - all it shows is a red screen / black screen :(

Implemented capital letters on my uart2ps2 converter!!! Time to do Amiga or C64 next!!!

I am currently debugging my uart to ps2 converter, had to implement a ram and complex shift logic...
Ugh these waves are giving me a headache

Extra images @ github hq

GUESS WHAT! The badges work!
Debugged till 0:30 am with spc, max, whatware :pf:
3000$ not wasted

Work done:
1. Coded UART2PS/2 converter in HDL. It allows me to use my laptop to control a icepi which acts as a translator to control a 2nd apple I icepi
- I don't have a PS/2 keeb lol
2. Resolved a lot of issues w/ crowd supply, sneek peek here:
https://gist.github.com/cheyao/b4e4dff16e57eee34059d490b6547e64

YEAH! I finished the firmware

Went through a few Crowd Supply Github issues.
And I took this nice picture of the icepi!

They are here??? 0.0

New features:
Icestudio support (https://icestudio.io/)
APIO support (https://github.com/FPGAwars/apio)
New APIO Icepi Zero example
Started porting NES over to Icepi Zero
Accepted at Crowd Supply

After some testing, I concluded that doom chip can't be ran on icepi zero due to insufficient DP16KD and MULT18X18D cells :(

Finished right side of keeb!

Worked out the v2 layout :D

160MHz CPU + RAM with custom hardware acceleration ported to the Icepi Zero!

Ported the Silice framework over to Icepi Zero! (https://github.com/sylefeb/Silice)

At the same time opened a pr to the upstream:
https://github.com/sylefeb/Silice/pull/281

Finally shipped this project!
Coded some example firmware, and posted on reddit
https://www.reddit.com/r/PrintedCircuitBoard/comments/1lq77ep/tiny_usb_esp32_wifi_board_came_back_looking_great/

90% of this was made before SoM

Take 2, forgot to select freecad project:
Made a case :D

Made the case :D

Icepi Zero now has USB capabilities:

Made a USB+HDMI core using 1000+ logic gates :D
Ultra low latency video refresh

Switched PCB to 2 layers in order to reduce cost :D

Batch 2 came :O

Updates:
- Patched kicad wakatime up
- Updated apple 1 to use v1.2 files
- Update files in github repo

Added the on/off switches! The PCB is finished :D

ordered part 2 of super secret undercity thing :O

Routed out most of the switch traces!

Designed the BMS!

Confirmed the production files with JLCPCB!

Fixed kicad wakatime!
Now you just need to pick a kicad_pro file, it has file filters and has better error messages!

Patched up kicad wakatime a bit more - take this beautiful pic

Just routed out most of the the nrf module and antenna!!!

YOLOed 1.6k$ :pray:

Ordering 1.3k$ of stuff soon...

Made the schematic! Gonna use a bare nrf module

:O

The schematic looks sooooooo much better with the new symbol

A/ I've patched up kicad-wakatime
B/ I've made a custom symbol of the ECP5-CABGA-256! My schematic will be much more prettier
C/ I've put the custom symbol into the schematic!

fixed up some crystal stuff

Made a cup :3

Wow, 1000$ just for the PCBs...

I've started writing up my journal - so the people who comes after me can know what I did :)

The programmer is also made :D Now waiting on the art,,,

I am starting to create my custom symbol of the ECP5 CABGA256 in order to avoid potential legal issues.

Spent 1h and only placed one fifth of the pins... (aka 50 pins)

Patched up kicad-wakatime :D https://github.com/hackclub/kicad-wakatime/pull/19

I finally can work on my custom symbol

Done with the 2nd PCB 0.0

Guess what it is~~~

More leeks :3 This time I'm almost finished

:leeks: from your favorite event: undercity! First person who guesses what this will be gets kudos :3

Guess what got ordered!

Icepi Zero v1.3 soon!

Ported over a USB core to Icepi Zero! - USB 1.0 spec implemented (like legit on the hardware level, not software)

It can now act as an keyboard!

(Also started patching up kicad-wakatime)

Got the original APPLE I working on the Icepi Zero! https://github.com/alangarf/apple-one/pull/45

This is an complete remake from the hardware level.