Alec Myers wrote:
>
> Does anyone know of a single-IC video interface?
>
> I have in mind a chip that behaves like an alpha-numeric LCD display,
> except with a composite (or some other) video output. You'd be able to send
> cursor commands to it, write characters to screen positions, read them
> back, etc, all via (say) an I2C or 8-wire interface. 80x24 characters would
> be nice.
>
> I have a datasheet for an STV9425 that sort-of fulfills this, but I'm
> wondering if there are any others out there.
>
> Any comments appreciated.
>
> Alec


Standard Microsystems Corp. has a 40 pin chip, the CRT9053, or CRT9153
that when paired with a Static RAM (6264) will do what you want.  It has
25 lines by 80 columns, with cursor control, blink, crude graphics,
scrolling and soft scrolling.   It uses 8 bit parallel input with some
control lines and has both composite video and separate HSYNC, VSYNC and
video outputs.  I don't know how available it is, but it costs about
$20.00.  Do a search on the web for them.
I've used this in the past for test instrument interface to an 80C552
controller.  If you use a 256K ram, you can have a multiwindow display,
just change the high order RAM address bits to jump pages.  Hope this
helps.

Dave Pearson