Wow! How'd ya do it? m
On Thu, Feb 24, 2022 at 12:52 AM Stephen Adolph <twospru...@gmail.com> wrote: > ...and found some more savings. *now down to 85 bytes*! Leaving 65 > bytes for more patch fun. > > > On Wed, Feb 23, 2022 at 1:24 PM Stephen Adolph <twospru...@gmail.com> > wrote: > >> In T200, the video subsystem was really reworked to take advantage of >> hardware scrolling. >> From a quick scan, it seems like the basic operation is the same for M100 >> and T200 (upper and lower portions of the LCD), so the same "organization" >> should be applicable to the M100. >> >> Could T200 video subsystem be back ported to M100? Perhaps a much deeper >> dive into the code could make the M100 truly work as well as the T200 from >> this perspective, but I would worry that the end result would be so >> substantially different that software compatibility may become an issue. >> >> I guess they got away with software scroll on M100, but T200 would have >> been completely unacceptable with such a slow scroll across 16 lines rather >> than 8. >> >> Anyhow, I have streamlined the patch now to only 95 bytes, leaving 55 >> bytes for more stuff. I may try to augment what is there with coverage for >> some of the additional scroll corner cases. >> >> Steve >> >> On Wed, Feb 23, 2022 at 10:48 AM Joshua O'Keefe <maj...@nachomountain.com> >> wrote: >> >>> > On Feb 23, 2022, at 7:17 AM, Stephen Adolph <twospru...@gmail.com> >>> wrote: >>> > I did a write up on the two patches that are needed. >>> >>> Steve, I remember seeing you mention this a while back and I'm glad you >>> were able to get back to it. Your write-up was clear, informative and >>> interesting. Thanks for sharing it. >>> >>> I wonder why this controller feature was never exploited. Was there >>> perhaps a similar, earlier part lacking the feature that was swapped out >>> late in the design cycle? Simple time constraints like every engineer in >>> history has faced? I can imagine all kinds of scenarios and it's a shame >>> we'll never know the real story of why the ROM is the way it is. >> >>
