November 2004 - Oberon - mailman3.inf.ethz.ch

Oberon Database
by Dan Parnete 19 Sep '05

19 Sep '05

Hello, I have read this list archives, the documentation inside the distributions, some extra found on the web and I understood. Database is a Tabu word in this community, and is better to not talk about. There is no trace in any distribution (excluding the commercial BlackBox) and the new Bluebottle project doesn't intend to implement one. Ok. It's a choice of live. But don't tell me none of you never needed to put some data altogether. I can't believe nobody extended at list the Library code to more flexible collections management. I saw some database projects started long time ago. Where are this implementations? In other words: if I need a database, have I write it myself? Dan

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Re: [Oberon] Support for Realtek RTL-8139 with Native Oberon
by frey＠inf.ethz.ch 05 Jan '05

05 Jan '05

> I'm running Native Oberon on a Pentium-II class machine. > How can a network card such as, Realtek RTL-8139 be > configured in Native Oberon ? PCITools.Scan was able to > detect this card as a PCI device. The driver is currently only available for the new Bluebottle OS. http://bluebottle.ethz.ch It should not be too difficult to make a Native Oberon driver out of the Bluebottle OS driver. But... I have no time to do this myself. --Thomas Frey

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Bluebottle, USB Controller, UHCI
by fnecati＠gyte.edu.tr 23 Nov '04

23 Nov '04

Hello developers, The below devices seems to be compatible and working on my PC with a USB memory stick when I add the following statements PCIFindUhci(24C4H, 8086H); (* seems compatible *) PCIFindUhci(24C7H, 8086H); (* seems compatible *) to FindControllers procedure in AosUsbUhci.Mod. Best regards, - Necati. *************** Bus 0, device 29, function 1: class/rev 0C030001, vendor/device 808624C4, status/cmd 02800005 Class: Serial bus controller, Sub-class: USB Controller, ProgIntfc: UHCI Vendor: Intel Corp., Device: 82801DB USB (Hub #2) IRQ5, INTB 32B I/O at 0000D400 - 0000D41F Bus 0, device 29, function 2: class/rev 0C030001, vendor/device 808624C7, status/cmd 02800005 Class: Serial bus controller, Sub-class: USB Controller, ProgIntfc: UHCI Vendor: Intel Corp., Device: 82801DB USB (Hub #3) IRQ10, INTC 32B I/O at 0000D000 - 0000D01F **************

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Re: [Oberon] n-o sound: hardware basics ?
by shark＠gulfnet.sd64.bc.ca 17 Nov '04

17 Nov '04

Chris, > Linux sees: Model: CMI8330/C3D Audio Adapter. Soldered on the board or plugged in? > I heard something from: > cat <soundFile> /dev/dsp [or ? /dev/audio] You are convinced that the sound hardware works properly for Linux? > And n-o / PCITools.Scan ~ sees: ... So n-o doesn't detect the sound hardware. > Q1 - can it be assumed that only 1 IRQ is alloacated to the MoBo > sound-system ? I've never heard otherwise. Does any documentation for a sound card mention more than one IRQ? If Linux can operate sound, the IRQ must be OK. > Q2 - what is this about "LowDMA" and "HighDMA" ? Don't know. Check the Web sites and manuals on PC hardware. > Q4 - would a 'sound device' just use a single port, or is this the > base-base adr. of a consecutive set ? Don't know. Again, check the documentation for all the sound cards you can find. > Q5 - is it correct that since IRQ is input only, I can't determine which > IRQ number is correct, except by 'activating' each sequentially until > I get a response - which is impractical ? With an ISA expansion card, you might be able to trace an interrupt line from the connector contact up to a jumper or to a pin on a chip. With a sound chip on a pci system board, this approach isn't so straightforward. This is a question for a PC hardware expert. > Q6 - how else should I proceed. Backtrack. What happens if you plug in a known working ISA Soundblaster card? I have always obtained sound from a *.wav file. The only problem was that PC Native 05.01.2003 was frozen after interpreting the file. Also check for pertinent system parameter settings. Is pnp off? Regards, Peter E. http://carnot.pathology.ubc.ca/

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Re: [Oberon] Oberon XML database and webforum
by Luc Bläser 10 Nov '04

10 Nov '04

Dear Mr. Drake The DXP-webpage facility should be documented by a short tutorial in DynamicWebpagePlugin.Text. The other facility, the object-oriented database is for enabling persistence of Oberon objects, which fulfil several programmed preconditions. This system is designed to be sufficiently powerful for small database sizes and also features transactional atomic as well as recoverability from unexpected system shutdowns. Such a persistent object should be a sub-type of the type 'PrevalenceSystem.PersistentObject' and implements three overridden procedures. The procedure 'Externalize' converts the actual state of the object to XML and 'Internalize' does so vice-versa. Furthermore, 'GetReferencedObjects' should return all other objects that are directly referenced by the object and should be also stored in the database (to enable garbage colection etc.) Sketch of an example: Person = OBJECT(PrevalenceSystem.PersistentObject) VAR name: ARRAY 40 OF CHAR; PROCEDURE Externalize(): XML.Content; BEGIN RETURN WebStd.CreateXMLText(name) END Externalize; PROCEDURE Internalize(xml: XML.Content); VAR s: Utilities.String; BEGIN s := GetXMLCharContent(XML.Container(xml)) END Internalize; PROCEDURE GetReferrencedObjects*() : PersistentObjectList; BEGIN RETURN NIL END GetReferencedObjects; END Person; A module, that provides a new persistent object type also has to specify a corresponding persistent type descriptor and a creator function, to obtain a new instance of the corresponding type. The predefined procedure 'GetPersistentObjectDescriptors' returns a list of all offered persistent object type descriptors of a module. MODULE MyPersonModule; (* implementation of the above object type Person *) VAR personTypeDesc: PrevalenceSystem.PersistentObjectDescriptor; PROCEDURE GetPersistentObjectDescriptors*(par:PTR): PTR; VAR descSet : PrevalenceSystem.PersistentObjectDescSet; descs: ARRAY 1 OF PrevalenceSystem.PersistentObjectDescriptor; BEGIN descs[0] := personTypeDesc; NEW(descSet, descs); RETURN descSet END GetPersistentObjectDescriptors; PROCEDURE CreateNewPerson(): PrevalenceSystem.PersistentObject; VAR obj: Person; BEGIN NEW(obj); RETURN obj END CreateNewPerson; BEGIN NEW(personTypeDesc, "MyPersonModule", "Person", CreateNewPerson) END MyPersonModule. In the AosCOnfig.XML, the following entry is furthermore required. <Section name="PrevalenceSystem"> <Section name="PersistentObjectModules"> <Setting value="MyPersonModule"/> </Section> </Section> Persistent objects are eventually created by the folowing two procedures: VAR p: Person; BEGIN NEW(p); AddPersistentObjectToRootSet(p, personTypeDesc); (* or otherwise *) AddPersistentObject(p, personTypeDesc) END; The first procedures adds the object two the root set, i.e. it permanently remains available, whereas for the second procedure, the object is deleted in the database if it is not referenced by another alive persistent object. For this simple example, the first procedure would be therefore correct. Once the object has been added, it gets a unique identity, reflected by the internal instance variable 'oid', which remains valid for multiple system runs. The object can be henceforth requested over its 'oid'. VAR x: PrevalenceSystem.PersistentObject; p: Person; BEGIN x:= GetPersistentObject(oid); p := x(Person) An object can be also searched via a filter function (This is especially important, if the oid is not yet known for an object). PROCEDURE JohnFilter(obj: PersistentObject) : BOOLEAN; BEGIN RETURN (obj IS Person) & (obj(Person).name = "John") END JohnFilter; VAR l: PersistentObjectList; l := FindPersistentObjects(JohnFilter) Changes to an object must be performed within a object-local transaction, such as it is depicted below: VAR p: Person BEGIN p.BeginModification; COPY("John Smith", p.name); p.EndModification; The objects registered as root elements are also removeable, whereas all other objects are automatically managed by a garbage collector in the database. RemovePersistentRootObject(p) I hope this gives a brief overview of the system. If there are further question, please don't hesitate to post them to the forum. Kind regards Luc Bläser

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Re: [Oberon] Oberon XML database and webforum
by mcintosh＠vima.austin.tx.us 08 Nov '04

08 Nov '04

> The DXP-webpage facility should be documented by a short tutorial in > DynamicWebpagePlugin.Text. > The other facility, the object-oriented database is for enabling > persistence of Oberon objects, which fulfil several programmed > preconditions. This system is designed to be sufficiently powerful for > small database sizes and also features transactional atomic as well as > recoverability from unexpected system shutdowns. > Soon, I will look for something that can give primative support to a relational database with queries and updates that are defined at design time. I have one or two short projects before I examine the XML database. However, since it is topical to the list today, I want to ask if it is likely to be useful for the following project: ---- I have the graphical prototype of a peer grading webpage located at http://peergrade.vima.austin.tx.us Although the factor analysis is developed, the ideas have been field tested by hand with actual students, and posters presented at conferences, it has all been done with pencil, paper, and hand driven calculations. None of the procedures behind the web pages are live. I assume that I will work on the student registration page next. I have assumed that I will have a relational database, and the registrations will be one of the relations. I will probably have first, last, and secret number in the relation. Also, I may have a "cookie," the IP number, and the time of registration. On later pages, when a student sumbits a grade, I will collect info into another relation. I think I will collect all that is submitted, including that with "bad" secret numbers (think passwords. These are random 5 digit numbers that they write by hand on paper on the first graded assignment in the lecture. It has to do with the Buckly restrictions (FERPA) and the desire to post grades publicly, nonetheless.) I will later need to pull data from several relations according to complicated, but fixed queries. -- Aubrey under BlueBottle

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Dialer.Mod, RingbackDialScript
by shark＠gulfnet.sd64.bc.ca 04 Nov '04

04 Nov '04

Hello Chris, Dialer.Mod, modified to pause for an empty send string, is now on my Oberon page. Desktops.OpenDoc http://carnot.pathology.ubc.ca/oberon.html My dial script is also there at the bottom of the page. (File names in alphabetical order.) These small changes allow you to dial from home to a Linux system at work for example, without having a separate phone line for the modem. Anyone implementing phone line communications for Bluebottle, Please consider implementing ringback for both call initiation and call answering. Regards, Peter E. Desktops.OpenDoc http://carnot.pathology.ubc.ca/

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Re (3): [Oberon] WinOberon V2.5
by zeller＠inf.ethz.ch 03 Nov '04

03 Nov '04

> 1. If it's possible to make RAM disk volume running. This will improve > allot my framework performance. The WinOberon Filesystem (FileDir, Files) is implemented on-top of the Windows Filesystem. Thus the simplst solution would be to use a RAM disk volume on Windows (is there such a thing?), > 2. If it's possible to declare ListGadgets.ToggleLine public. Yes, I will include this in my next build. -- Emil

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Re (2): [Oberon] WinOberon V2.5
by zeller＠inf.ethz.ch 02 Nov '04

02 Nov '04

I have put a zip file containing two bugfixes on the ftp server. ( ftp://ftp.inf.ethz.ch/pub/ETHOberon/Win95NT/PlugIn/WinOberonFix.zip ) TextGadgets0 fixes Copy, Grow problem NetSystem fixes problem with ReceiveDG -- Emil

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RE: [Oberon] WinOberon V2.5
by Hof, Philipp 01 Nov '04

01 Nov '04

Ditto with XP Growing the viewer renders the line spacing wrong. Lines shift over each other. Thanks for updating Oberon for Windows! It was great to see a new release after such a long time. It is the only Oberon version (except for Blackbox) I can run:) By the way, how does the future of WinOberon look like? Cheers, Philipp -----Original Message----- From: Gérard Meunier [mailto:gemeu@free.fr] Sent: Monday, 1 November 2004 11:32 a.m. To: oberon(a)inf.ethz.ch Subject: [Oberon] WinOberon V2.5 Hello Oberoners, In the last version (2.5, October 2004) of ETH PlugIn Oberon for Windows, the Grow and Copy commands at the top of viewers (in the tiled viewers mode) don't work properly. When used, the new opened viewers are not readable. I'm working with Win98. Cheers. Gérard -- Oberon(a)inf.ethz.ch mailing list for ETH Oberon and related systems https://www.mail.inf.ethz.ch/lists/listinfo/oberon

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