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AuthorTopic: AppShell Appbuilder  (Read 3962 times)

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Offline kamelito

Re: AppShell Appbuilder
« Reply #15 on: July 29, 2017, 08:17:55 PM »
Reading your statements about linked lists remind me of this talk.  https://www.youtube.com/watch?v=YQs6IC-vgmo  Kamelito
 

Offline olsen

Re: AppShell Appbuilder
« Reply #16 on: July 31, 2017, 10:36:01 AM »
Quote from: kamelito;828871
Reading your statements about linked lists remind me of this talk.  https://www.youtube.com/watch?v=YQs6IC-vgmo  Kamelito


Yes, there are common constraints between the doubly-linked lists described in Mr. Stroustrup's talk and what the ASL file requester has to deal with.

As always, lists such as these work very well if the contents are accessed in sequence, such as in queues or stacks. The scalability issues arise when random access is performed and more than a handful list items are involved. This occurs in the ASL file requester whenever new list items are added, so that the list remains sorted.

Mr. Stroustrup makes a good point that tables tend to make for better performance rather than dynamic data structures such as doubly-linked lists. This advantage becomes even more pronounced if you take the respective memory access patterns into account, which for doubly-linked lists do not play well with the CPU cache.

Sometimes, however, you do not have much of a choice between tables and dynamic data structures. The ASL file requester needs to build the list dynamically, allocating new memory as further entries are added. It is designed to work well enough on systems with very little memory (1 Megabytes of RAM), and preallocating static chunks of memory to store the table and the associated entry data in would not work so well under these constraints (although it would keep memory fragmentation at bay and probably yield better runtime performance).
 

Offline Matt_H

Re: AppShell Appbuilder
« Reply #17 on: August 18, 2017, 12:53:24 AM »
Did a little more digging and found that AppShell was included on the 1991 DevCon disks which subsequently made it onto some of the Developer CDs. So at least that component was publicly released. Surprised it didn't get any use within the developer community at the time...
 

Offline SamuraiCrow

AppShell Appbuilder
« Reply #18 on: August 18, 2017, 03:55:03 PM »
I suppose these tools would have made a worthy addition to many developer toolkits.  As long as I am thinking of it, I think it would have made AmigaVision a worthy beginner level software toolkit instead of a buggy competitor to Scala if the functionality could be integrated.
 

Offline kamelito

Re: AppShell Appbuilder
« Reply #19 on: December 01, 2020, 09:40:37 AM »
Found this on usenet

“Powerwindows is obsolite. Innovatronics has a new product slated for
release at devcon in Orlando called appbuilder. They have been
working very closely with CBM and although they have been (development
necessary) vague with me about what it actually does, it is supposed
to be for C and other compiled languages what CANDO was for AREXX!”
 

Offline SamuraiCrow

Re: AppShell Appbuilder
« Reply #20 on: December 01, 2020, 01:23:41 PM »
And then, in 1993, came MUI :)
MUI Builder still needs a total rewrite.  It's open source C but not worth fixing.  It's on SourceForge if you want a look.
 

Offline kolla

Re: AppShell Appbuilder
« Reply #21 on: December 02, 2020, 08:47:57 AM »
MUI Builder still needs a total rewrite.  It's open source C but not worth fixing.  It's on SourceForge if you want a look.
I don't often build so called apps using MUI, but when I did, I used MUIRexx :)
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Offline trilobyte

Re: AppShell Appbuilder
« Reply #22 on: January 05, 2021, 06:43:47 AM »
I don't think these ever made it out the door. There's some info/code in the Commodore server dump that was circulating a year or two ago. The build of appshell.library in that archive is dated May 13, 1992, so I think this was something that CATS canceled, as opposed to it being ended by the bankruptcy. There's also an older release notes file (May 1991) that makes reference to appshell.library, appobjects.library, prefs.library, and hyper.library.

I was super-curious about these dev tools also.  I asked around at the Amiga 30th in Mountain View in 2015, and if I remember right, I actually got to speak to Randell Jesup and Carolyn Scheppner (and soon after meet Dave Needle).  I don't remember if I got to speak with David Junod!

This was all connected & related to an IFF spec that described UI elements using 32-bit words, similar to classic Mac resource forks, no? 

PowerWindows (as mentioned later in this thread) from Inovatronics was (IIRC) written by Todor Fay, and is also a big part of how Bars & Pipes UI was constructed.
Amiga user since \'96, when I could finally afford one
Commodore 8-bit since before I could tie my shoes