5MHz Upgrade hacks

From Bitchin100 DocGarden
Revision as of 20:28, 18 November 2021 by Sadolph (talk | contribs) (Created page with " == Can we speed up the Model T? Apparently! == I have been investigating various ways to make the Model T run … faster. Currently I have fixed 5hMz upgrade solutions for...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.


Can we speed up the Model T? Apparently!

I have been investigating various ways to make the Model T run … faster.

Currently I have fixed 5hMz upgrade solutions for 

  M100
  T102
  M100 running NSC800 CPU

I am currently working on a software switched solution where you can change between stock clock and turbo modes using a simple OUT command in BASIC.

As I test and more-or-less land on a reasonable upgrade process, I will post instruction files here If you have any questions, please get in touch with me at Twospruces at --the google mail service.


What are the tradeoffs?

When installed, your laptop will be running at 2x clock speed. However, the system clock remains unchanged. 

  1.  Processor, memory, LCD, I/O. BCR are all running at 5MHz
  2.  The serial port, modem and printer ports are unchanged
  3.  Cassette port will not work correctly.  It will be 2x faster. (makes the case for a switchable solution).


What do you need?

  Some hardware skills - soldering, PCB modification etc.
  a clock divider circuit board
  a small number of parts (depending on the solution)
  a 9.803 HC49 crystal

Instructions

Fixed 5 MHz upgrade: T102 5MHz mod V1 Nov 2021.pdf

coming soon - M100 fixed upgrade, software switchable solutions

Retrieved from "https://bitchin100.com/wiki/index.php?title=5MHz_Upgrade_hacks&oldid=3904"