LT6502
-
LT6502b
As much as I love my 6502 laptop, it felt a bit “chunky” at nearly 75mm deep and I really wanted a bigger screen as 9″ is a bit teeny. So I set about improving on that and the LT6502b project is underway, The main differences are; Things had been going very well; Compact flash working, console working, beeper working, 6522 VIA working and display working! Here is a 1024 x 600 Mandelbrot with 32 iterations, looks fabulous. Getting the screen working took the longest time, the new driver chip (RA8889) is way more complex than the previous RA8875 one, but was needed for the higher resolution/larger screen. That probably…
-
LT6502 is assembled
I give you the very chonky 6502 based laptop; It has been quite the challenge to get this up and running, the main challenges code wise were;1) Getting the screen to work, and getting scrolling to work (that was way more effort than I thought it would be).2) Understanding EhBASIC and how it works so that I could add in extra commands. Talking of which here are the commands I’ve added; The biggest challenge of all for me was the case, what you is the 3rd or 4th revision of most parts. The hinges in particular were incredibly difficult.The hinges were inspired by this print – https://www.printables.com/model/658393-friction-hinge-mechanism/comments#preview.file.aPNjd. It took a…
-
LT6502
Building on the PC6502 system I decided to make a laptop 6502 system. I think there’s something nice about having a portable retro system that is fully self contained. It’s going very well so far. It’s been quite a steep learning curve. I’ve been remembering the 6502 assembly coding I did back in the 1980s, slowly remembering. It’s been fun to bring the system up one bit at a time, starting EhBASIC, getting teh display working, the beeper and compact flash. So here is where I’m at; Here was the test of the comms with the keyboard, a simple “HELLO” from basic, which is being controlled by the console port…
-
PC6502 update
I have been tinkering with various bits of the PC6502 computer system in between looking after Suzi (who is getting better slowly, but we still have a couple of months of hard work ahead of us). Previously I was able to show the OPL3 Sound and Speech card working, Here is an updated video of it playing a tune 🙂 Next I managed to get the display working, this is a 480×272 screen, it has built in fonts and a bunch of features line circle, line drawing and filling, so I can do a bunch of cool things as I go forward with it. I’ve not figured out how to…