Hi,
As somebody that is trying to document a lot of lost, and new configurations for the Altair 8800 and IMSAI 8080 computers its a lot of work. I have some help from others in the S100 Google group to provide software and documentation , but still, its a lot of work making it easy for beginners. As a TRS-80 Model 100 owner I have to add my 2Cents which is, I suggest you make a series of video shorts. Pick one thing, one subject, like What to Buy and How to install the hardware. Then the next video is Setting up and Using the Software for that. Talk slow take your time so people can easily scroll the play-bar back n forth to find parts in the video they need to review once or twice as they switch to their computer to implement what is happening in the video. Too many demo videos go too fast and worse, include too many different things to do. Good luck! ============================================================================ ================== C U L8r, °|° Walt Perko °|° "Kids ... teach them the good stuff, and they still learn the bad stuff on their own." http://www.R2Pv1.com/ RoboGuts Intelligent content for 3D printing making S.T.E.A.M. education better, easier and more affordable Experiments to learn how to use various Electronic Components, Structured Computer Programming, Phonemes for Speech &Song in any language, and Art. "The World Needs a New Economic Model" ============================================================================ ================== Sent from the Cyber7 From: M100 On Behalf Of Ken St. Cyr Sent: Tuesday, November 21, 2023 8:12 AM To: [email protected] Subject: Re: [M100] Model T clock doubler Amazing work, Steve! I've been thinking about doing an M100 mod extravaganza video, so this is one mod that I definitely want to do for that project. I'll likely be checking it out over Christmas break in a few weeks. //Ken S _____ From: M100 <[email protected] <mailto:[email protected]> > on behalf of Brian White <[email protected] <mailto:[email protected]> > Sent: Monday, November 20, 2023 12:46:06 PM To: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > Subject: Re: [M100] Model T clock doubler Hah, all of my own boards get to about v 12 before I'm mostly happy, and then continue polishing for several more. It's almost like software, never really done. bkw On Sun, Nov 19, 2023, 7:56 PM Stephen Adolph <[email protected] <mailto:[email protected]> > wrote: I jumped the gun a bit, needed to redo the boards and change the circuit. On Sunday, November 19, 2023, Brian K. White <[email protected] <mailto:[email protected]> > wrote: None of the file links work, but I'm sure it *will* be awesome. Sounds super. On 11/18/23 10:54, Stephen Adolph wrote: Hi everyone, I've been working towards finishing off my project for increasing the speed of the Model T laptops. The idea is to create a (relatively) easy to make and install solution that allows the user to switch the clock rate from 2.5 MHz to 5 MHz. This is really nice on the 40x8 LCD machines. The universal software command to switch clock rate is OUT 85,1 for 2x mode and OUT 85,0 for 1x mode. Of course the Model T is not designed for this, but in my experience so far, it seems reliable. I really like the upgrade and plan to install in all my laptops. Being able to operate in nominal clock mode is of course very useful because you may find some software to be incompatible. Models I have upgraded to date: * M100 (NA, early variant, not UK) * T102 * T200 * NEC PC-8201/8201a * Olivetti M10 I am publishing all the information needed to DIY this upgrade. I don't have any plans to make these upgrades. Consider this upgrade only if you are comfortable with soldering surface mount parts, and with making minor modifications to your laptop. Upgrades that are done and in the process of documentation are M100, T200, NEC. Upgrades that need a new PCB design still are T102 and M10. All information will be at this site: https://bitchin100.com/wiki/index.php?title=5MHZ_upgrade_for_Model_T <https://bitchin100.com/wiki/index.php?title=5MHZ_upgrade_for_Model_T> I am publishing * PCB designs for the clock doubler board (there are a few variants) * schematic * bill of materials for parts you need * documentation for building the clock doubler * installation documentation per laptop Things I have discovered while developing this; 1. Power consumption goes up by about 20% when you run at 2x clock. 2. Depending on the speed of your SRAM, you may need to implement a modification to speed that up. Each model has a specific mod you need. 3. In M100 with the custom socket pinout, in most cases you need to upgrade your Main ROM to something faster. This usually involves an adapter board and an EPROM. 4. In the Tandy 200, one must slow down the machine temporarily to access the RTC. There is a specific change for that. Anyhow, as I complete a particular laptop, I'll post the needed files. Hopefully this will be of some interest for those inclined to play around with hardware. I have no problem if anyone wants to take the design and improve it or change it. Feel free to contact me directly with questions. cheers Steve -- bkw
