Hi all,
im researching a shr VGA/LCD solution for the Apple //e and IIgs. Since the VOC has demonstrated the possibility of SHR in the Apple //e and as there is a Carte Blanch bitstream for SHR available, i have looked deeper into the matter. My results with the CarteBlanche are not as promising as i thought. A powerful display-solution needs more memory than the 2x128k Sram on the CarteBlanche. The other Problem is, that the CB is very rare (only 50 were ever produced).
I have found some nice LCD-Controller that feature 8-bit interfaces, and 6800/8080 compatibility (3.3V though).
SSD1963: 'intelligent' Framebuffer
RA8875: enhanced Graphics LCD Controller
Both Controllers allow up to 800x480px resolution and offer up to 16bit (RA8875) and 24bit (SSD1963) color.
The RA8875 has several Text-modes, supports Graphics-functions and allows DMA (and BitBLT) functions with an external Flash of up to 16mb.
The SSD1963 has a direct 24bit interface, that can be configured for use with a 8bit-bus. This Chip does not have any Graphics or Text-Functions but offers some Bitmap-modes.
EDIT: i have added the Appnote for the RA8875 as well as Info on the Proto-board im going to use for the CarteBlanche.