micro-fpga / mega65-hacks Goto Github PK
View Code? Open in Web Editor NEWHacks and non standard things with MEGA65 Computer
License: Apache License 2.0
Hacks and non standard things with MEGA65 Computer
License: Apache License 2.0
The inputs from the floppy drive require pull-ups on them.
See: http://c65gs.blogspot.com/2018/01/bringing-internal-35-floppy-drive-to.html
The pins are:
index
track0
writeprotect
rdata
diskchanged
HARD FIX: maybe no fix, possible signal integrity issue.
Can maybe try using different pin for keyboard scan clock?
SOFT FIX: MAX10 can disable scan clock when keyboard JTAG is selected or by other free DIP switch setting?
on board user-debug LED D9 could be moved to somewhat more meaningful place?
would increase the output power.
This can be patched on R2
Up,down,left,right and fire require pull-ups.
Cartridge port needs to be 2mm wider to fit the insanely wide MSSIAH cartridge.
(Part of the problem is the case. I'll verify what change on the PCB spacing we also need)
We also need a control line that cuts all power to the cartridge port for cartridges (like the MSSIAH) that have very sensitive reset timing properties.
SER_CLK, SER_DATA, SER_SRQ require pull-ups.
I need to confirm, but I believe RESET and ATN do not require pull-ups.
See Issue #4 for background: The audio level is still much too quiet.
connect some free pin to GND on R3 to detect R2 vs R3
Silkscreen or otherwise, as you think best. Deft has I think given you the filees already.
Keyboard JTAG only works at reduced TCK speed.
FIX: maybe non, to be investigated.
cosmetic minor change in schematic:
use pin J16 with internal pullup in all cases where "dummy reset" pin is required in the design. This pin should be left UNCONNECTED in all PCB versions
A declarative, efficient, and flexible JavaScript library for building user interfaces.
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. ๐๐๐
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google โค๏ธ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.