Re: [M100] hardware scrolling patch

Created a page to host information on the patches used- M100/T102 Hardware scrolling patch - Bitchin100 DocGarden On Thu, Mar 10, 2022 at 11:31 PM Stephen Adolph wrote: > Follow up on this- > I found that my

Re: [M100] hardware scrolling patch

Follow up on this- I found that my hardware scroll patch conflicts with TS-DOS! TS-DOS uses HahasiH too, so I will need to move to a non conflicting hidey-hole. I don't think I wrote this up at Bitchin100 - I will do so, and post the fixed code. I am working on rolling this patch out on my M100s

Re: [M100] hardware scrolling patch

Good work Steve, and reducing it to 65 bytes - cool bananas. I agree, M100 CP/M uses rst 4 to output text so this should work fine with the Page Register in hi RAM zeroed out. Philip On 24/02/2022 5:29 pm, Stephen Adolph wrote: Hi Tom, I was thinking about that.  It may well work with CP/m

Re: [M100] hardware scrolling patch

Wow! How'd ya do it? m On Thu, Feb 24, 2022 at 12:52 AM Stephen Adolph 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 > wrote: > >> In T200, the video subsystem was really reworked

Re: [M100] hardware scrolling patch

incredible! bkw On Thu, Feb 24, 2022, 12:52 AM Stephen Adolph 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 > wrote: > >> In T200, the video subsystem was really reworked to take

Re: [M100] hardware scrolling patch

Hi Tom, I was thinking about that. It may well work with CP/m or if not exactly this patch then maybe a minor variant. The m100 main rom provides all of these routines for cp/m. Cp/m always powers up as an M100 but the upper ram image would need to have the one location that stores page state

Re: [M100] hardware scrolling patch

Hi Mike, It is the M102 rom, but I use it in my M100. This image might have y2k patch applied also. Anyhow it should work in M100. Let me know if it doesnt! I personally have only tested in virtualT. Steve On Wednesday, February 23, 2022, Mike Stein wrote: > Looks good;is this only for the

Re: [M100] hardware scrolling patch

Looks good;is this only for the 102 or also the M100? On Wed, Feb 23, 2022 at 5:10 PM Stephen Adolph wrote: > I'm trying to attach a patched rom to play with. Will this get through? > thx > Steve > > On Wed, Feb 23, 2022 at 3:57 PM Peter Vollan wrote: > >> Maybe Bill was in a hurry. >> >> On

Re: [M100] hardware scrolling patch

I'm trying to attach a patched rom to play with. Will this get through? thx Steve On Wed, Feb 23, 2022 at 3:57 PM Peter Vollan wrote: > Maybe Bill was in a hurry. > > On Wed, 23 Feb 2022 at 11:53, John R. Hogerhuis wrote: > >> Very cool. The slow scroll is one of the noticeable issues of the

Re: [M100] hardware scrolling patch

Maybe Bill was in a hurry. On Wed, 23 Feb 2022 at 11:53, John R. Hogerhuis wrote: > Very cool. The slow scroll is one of the noticeable issues of the > M100/T102. > > Missed opportunity for Bill G. Similar to not implementing the higher baud > rates and hardware flow control for the UART. > >

Re: [M100] hardware scrolling patch

Very cool. The slow scroll is one of the noticeable issues of the M100/T102. Missed opportunity for Bill G. Similar to not implementing the higher baud rates and hardware flow control for the UART. But it's all about cost versus benefit, time to market. "Premature optimization is the root of

Re: [M100] hardware scrolling patch

...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 wrote: > In T200, the video subsystem was really reworked to take advantage of > hardware scrolling. > From a quick scan, it seems like the basic

Re: [M100] hardware scrolling patch

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

Re: [M100] hardware scrolling patch

Could this work with CP/M? On Wed, Feb 23, 2022 at 7:48 AM Joshua O'Keefe wrote: > > On Feb 23, 2022, at 7:17 AM, Stephen Adolph > 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

Re: [M100] hardware scrolling patch

> On Feb 23, 2022, at 7:17 AM, Stephen Adolph 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

Re: [M100] hardware scrolling patch

Thanks Ken. I did a write up on the two patches that are needed. * base patch, to clear the hole for the subsequent patches * hardware scroll patch, which overlays Comments welcome. Document is zipped and is word. On Wed, Feb 23, 2022 at 10:00 AM Ken Pettit wrote: > Hey Steve, > > Great job!

Re: [M100] hardware scrolling patch

Hey Steve, Great job! 72 seconds still isn't bad considering you still have to update the scroll value on 10 LCD controllers and copy one line from the bottom controller to the top controller, plus all the added logic to keep track of which line is which. And it is always satisfying to

Re: [M100] hardware scrolling patch

So, as a figure of merit, I decided to use A-DUEL.BA as a listing source. Under these conditions - virtualT @ 2.5MHz Listing took 72 seconds with hardware scroll "on" Listing took 120 seconds with no hardware scroll. The speed up is pretty reasonable, but not like 10x faster or anything. (and I

[M100] hardware scrolling patch

Well, I started this little activity in 2006. I have a pretty good working "hardware scroll patch" now running in virtual T! Recall- * the M100 LCD drivers have a hardware scroll mode * M100 does not take advantage of it to speed things up. * I previously made a patch to the M100 rom that frees