Hello, friends!
I don't like the TX0108. I found another alternative, which seemed more suitable to me: the ADG3308. I ordered it and am waiting. Once my order arrives, I'll build the parallel interface.

an interesting idea, worth trying :)
Let us know how you get on

Hello, Paula!
Of course, I'll tell you if you don't beat me to it. I'm currently struggling with free time, so I'm not progressing as quickly as I'd like. But my idea is absolutely feasible and doable. Today, I delved into the theory ...

Good day, friends.

I had this idea (I haven't tested it in practice): the Ra7588 has 768 kilobytes of video memory. If you use 256 colors per pixel, only half is displayed. The other half (384 kilobytes) is used as layer 2, which doesn't need to be displayed. The idea is that you can load some ...

Did you see my video showing the screen fill rate?

I did, but if you use the block fill as suggested previously it's instant.
See my RA8875 based 9" screen switch on, initialise and clear in under 1 second using that method

https://files.mastodon.social/media_attachments/files/115/951/333/292 ...

Hi Alexey,

As Glenn says there is a way to clear the screen quickly, use the built in engine to draw a square that is the size of the screen, in black and then fill the square in black.
It needs about 16 commands, to be sent, but takes a fraction of a second (I think I measured around ...

I managed to get scrolling working on my 6502 laptop screen.
This uses the block transfer engine, which copies the bottom portion of the screen (0,16 - 800,480) to the top of the screen (0,0) and then fills the bottom 16 pixels with black (draw fille square in black).
The scrolling is instant and ...

Hi Alexey,

As Glenn says there is a way to clear the screen quickly, use the built in engine to draw a square that is the size of the screen, in black and then fill the square in black.
It needs about 16 commands, to be sent, but takes a fraction of a second (I think I measured around ...

I managed to get scrolling working on my 6502 laptop screen.
This uses the block transfer engine, which copies the bottom portion of the screen (0,16 - 800,480) to the top of the screen (0,0) and then fills the bottom 16 pixels with black (draw fille square in black).
The scrolling is instant and ...

Hello, I'm not sure I completely understand the questions you ask, but any operations that involve filling or moving screen data should be left to the graphics processor : the RA8875. A complete fill of the 8" (800x480 pixels) screen takes much less than 1s. You need to watch the !wait signal to ...

Yesterday, I tried to find a more or less understandable, in-depth description of the S51K online, but I haven't found one yet. If you have a book or documentation, please share.
Unfortunately, it seems on-line documentation on S51K has gone the way of the dinosaurs. :shock: My familiarity with ...

Should I use FAT as the file system or create my own, more suited to modest resources?
First off, greetings and welcome to 6502-land.

Although FAT is sort of universal (mostly for historical reasons), it is a convoluted mess, as Neil (barnacle, who posted above) will readily attest. :D On the ...

Good day, friends.
I managed to connect an 8-inch display to my 6502 via SPI and display text, change colors, and clear and fill the screen. I was also able to activate the text cursor and graphic cursor, activate the touchpad, and position the cursor when tapping. I have a question: with an SPI bus ...

I'm currently looking to create a file system for storing files and a small disk operating system. I've even started writing my own very simple command line interface. But I'm still unsure. Should I use FAT as the file system or create my own, more suited to modest resources? I have some ideas. It ...

I'm currently looking to create a file system for storing files and a small disk operating system. I've even started writing my own very simple command line interface. But I'm still unsure. Should I use FAT as the file system or create my own, more suited to modest resources? I have some ideas. It ...

Good afternoon, friends. Thank you for your interest in my design.
This is my first project.
In general, it was conceived as a small standalone desktop device that does not take up much space on the table, without the need to connect an external display, for experiments with connecting various ...