[MPlayer-users] RE: [m68HC11] Interfacing Graphical LCD with 68hc11?

[by way of MAOS <teck@charter.net>]

> -----Original Message-----
> From: BobGardner at aol.com [mailto:BobGardner at aol.com]
> Sent: Monday, November 18, 2002 11:17 PM
> To: m68HC11 at yahoogroups.com
> Subject: Re: [m68HC11] Interfacing Graphical LCD with 68hc11?
>
>
> Lets say you want to use a SED1330 graphics chip... its just a
> regular old
> memory mapped chip that you hang on the bus like a serial port or ram or
> rom... you need to decode a hunk of address space for each
> peripheral in the
> memory map... like 32k for rom, 16k for ram, 4k for you're
> controller etc.
> You can use an LS138 hung on the address lines to generate the
> chip selects
> for the peripherals... there are several motorola app notes that
> show how to
> latch the multiplexed address into an LS373... so the data and
> control regs
> in the peripherals are just read and write memory locations like
> ram.... now
> you need to write an initthegraphicscontroller subroutine, and a
> setpixel(x,y) subroutine and maybe a clearscreen subroutine, and
> you've got
> the primitives needed to do line draw, box draw, rect fill, etc.
> Draw text by
> calling setpix in a loop... its slow, but it works.....

Sorry Bob to correct you:
Are you thinking of the good old 6845?
The SED1330 isn't memory mapped. It has an indexed addressing. The
recommendation is really good, but the SED1330 is (being) phased out.
Go and look for its successor, the SED1335, now called S1D13305. There
are some boards around.
Features include and on-chip character generator, the ability to overlay
image layers (up to three) and a reasonable set of parameters for display
configuration. You can easily hook it up to 8080 or 6800 bus style
(hardware selectable).

Rudolf.

--
Rudolf Sosnowsky +++ LC Design
EPSON Technology Partner
E-Mail Rudolf.Sosnowsky at LC-Design.de <mailto:Rudolf.Sosnowsky at LC-Design.de>
Internet http://www.LC-Design.de



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