GAG-NEWS 69 September/Oktober 2003 Hardware

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GAG-NEWS 69 September/Oktober 2003 Hardware Hardware vielbeschworene Medusa-Nachfolger Hardware Abstrac- IYONIX pc vs. Omega tion Layer, kurz HAL). Steffen Huber Castle setzt ganz auf integrierte Kom- Nichtsdestotrotz ponenten aus dem PC-Markt. Das überzeugt RISC Ein altes englisches Sprichwort Herzstück, der XScale 80321 von Intel, OS 5 durch einen lautet sinngemäß: „Man wartet getaktet mit 600 MHz, beinhaltet Satz interessanter ewig auf den Bus, und dann kom- gleichzeitig den RAM-Controller (200 Features gegenüber men zwei gleichzeitig.“ Ungefähr MHz DDR-RAM) und den PCI-Buscon- Version 4: Fontmanager mit Unicode- so stellt sich derzeit die Situation troller (32bit/33 MHz und 64bit/66 Unterstützung, DHCP fürs Ethernet, im RISC OS-Markt dar. Nachdem MHz). Die Grafikkarte ist eine Stan- LanManFS mitgeliefert (inklusive Sup- man fast schon geologische Zeit- dard-PCI-Grafikkarte aus dem nVidia- port für lange Dateinamen), USB- räume auf einen würdigen Risc Stall (Geforce2 MX400), das on-board- Unterstützung, maximaler WimpSlot PC-Nachfolger gewartet hat, ist Netzwerk basiert auf einem Gigabit- von 1 GB pro Programm anstatt 28 MB, nun die Qual der Wahl angesagt: Ethernet-Chip von Intel, USB wird Support für bedeutend größere Parti- Der IYONIX pc von Castle Tech- über eine Standard-PCI-Karte realisiert, tionen sowie natürlich die unvermeid- nologies oder der Omega von Sound kommt von einem AC97-Chip- lichen Bugfixes und Optimierungen. MicroDigital? satz und die diversen Peripheriegeräte (UDMA-IDE, zwei serielle Ports) wer- Omegaseitig könnte man theoretisch den von einer Standard-Southbridge natürlich für rund 230 die neueste Die Testkandidaten sind ein IYONIX (über PCI angekoppelt) bereitgestellt, Select-Version (inklusive aller weiterer pc mit CD-Brenner, 512 MB RAM und wie man sie ebenfalls vom PC-Markt Versionen, die innerhalb eines Jahres 80er Platte, der Omega ist das Midi- kennt. veröffentlicht werden) dazukaufen, Tower-Modell und hat 64 MB RAM, einige Features von RISC OS 5 sind eine 40er Platte und ebenfalls einen Der Omega geht praktisch den entge- dort aber nicht enthalten, und außer- CD-Brenner intus. Es wurde mit dem gengesetzten Weg. Der Prozessor ist ein dem würde damit der Preisnachteil des zurzeit aktuellen FPGA-Image Version altbekannter Intel StrongARM 110 Omega noch weiter verschärft (sofern 12 getestet. (300 MHz), wie er auch schon im Risc man nicht eh schon für seinen alten PC als Prozessorkarte erhältlich war, Risc PC ein Select-Abo am Laufen hat – Wo Preise genannt werden, verstehen ein zusätzlicher Prozessorsteckplatz ist Select kann ja bekannterweise mit sie sich inkl. 16% Mehrwertsteuer und vorhanden. Grafik, RAM-Controller einer einzigen Lizenz auf bis zu zehn einem Pfundkurs von 1,50. und PCI-Buscontroller sind durch ent- Rechnern eingesetzt werden). Das sprechende Programmierung von größte Hindernis ist aber, dass keine FPGAs realisiert. Das RAM ist als Sha- derzeitige Select-Version überhaupt für Geschichten von früher red Memory Architektur gelöst, d. h. den Omega freigegeben ist. Ob ein Prozessor(en) und Grafik teilen sich „Omega-Select“ vor einem „IYONIX- Sowohl Castle als auch MicroDigital Speicherplatz und Bandbreite. Nur die Select“ das Licht der Welt erblickt, sind keine Unbekannten in der RISC Anbindung diverser Peripherie ge- bleibt also vorerst abzuwarten. OS-Welt. Von Castle kennt man SCSI- schieht wie beim IYONIX pc über eine Podules, Netzwerkkarten, Kinetic und PCI-Southbridge (UDMA-IDE, parallele Oregano sowie die alten Risc PC- und und serielle Schnittstellen, PS/2-Ports Die Prozessoren A7000(+)-Rechner, MicroDigital mach- für Tastatur und Maus, USB), für den te erstmals durch den Mico auf sich Sound ist eine PCI-Karte zuständig. 600 MHz stehen hier für den IYONIX aufmerksam, einem allerdings wenig pc zu Buche, 300 MHz für den Omega. erfolgreichen ARM7500FE-basierten Welches der beiden Konzepte für die Genauso deutlich, wie sich das in Computer. Kundschaft im Endeffekt „besser“ ist, Zahlen darstellt, ist dieser Unterschied hängt nicht zuletzt von den individu- in der täglichen Arbeit zu bemerken. Seit Oktober 2002 ist der Castle IYO- ellen Ansprüchen ab. Zunächst kann Die diversen Benchmarks sprechen da NIX pc für den gemeinen Benutzer man aber leidenschaftslos festhalten, ebenfalls eine sehr deutliche Sprache. erhältlich, seit Juni 2003 wird, wenn dass der IYONIX pc sowohl bedeutend auch momentan nur tröpfchenweise preiswerter als auch im Standardliefer- Das einzige, was hier für den Omega und an ausgewählte Kunden, der umfang sehr viel leistungsfähiger ist. hier spricht, ist die Kompatibilität zur MicroDigital Omega ausgeliefert. Altsoftware. Es soll hier nicht mehr die 26/32bit-Diskussion erneut aufgerollt Das Betriebssystem werden – Tatsache ist, dass der IYONIX Rechnerphilosophien pc 26bit-Software nur über den Aemu- Hier heißt es RISC OS 5 (IYONIX pc) lor-Umweg ausführen kann und dabei Obwohl beide Kontrahenten den Risc versus RISC OS 4 (Omega). Das hört nicht ganz die Ausführungsgeschwin- PC beerben wollen, gibt es doch erheb- sich zunächst dramatischer an als es digkeit des Omega erreicht. Bei liche Unterschiede in der Entwick- ist: der große Versionssprung äußert diverser systemnaher Software muss lungsphilosophie. sich weniger in einer Fülle neuer der IYONIX pc (bzw. der Aemulor) im Features, sondern vielmehr in der Moment sogar ganz passen. Anpassung an Nur-32bit-Prozessoren und Nicht-Acorn-Hardware (sprich: der 3 GAG-NEWS 69 September/Oktober 2003 http://www.gag.de Hardware Die Hauptprozessoren sind bei beiden auch beim IYONIX pc sieht es nicht Treiber bereit stehen. Die Omega-USB- Systemen nicht upgradebar auf der signifikant besser aus. Beschleuniger- Lösung ist eine reine USB1.1-basieren- Platine aufgelötet. Der Omega bietet funktionalität wird derzeit nur im 2D- de, mehr gibt die verwendete South- aber einen zusätzlichen Prozessorslot, Bereich zum Zeichnen von ausgefüll- bridge nicht her. in dem irgendwann einmal ein XScale ten Rechtecken sowie zum Kopieren oder ähnlich schneller ARM Platz von Bildschirmbereichen genutzt. Von Beim IYONIX pc mitgeliefert finden soll – inwieweit das dafür von einer 3D-API ist man natürlich noch sind die obligatorischen Trei- MicroDigital vorgesehene ARMTwister- weit entfernt, von einer Nutzung der System jemals funktionieren wird, 2D-Movie-Features wie Colourspace bleibt weiterhin das Geheimnis dieser Conversion oder Motion Compensa- Firma, denn bisher hat noch niemand tion ist derzeit auch noch wenig zu ber für Maus, Tastatur und USB-Hubs. einen funktionierenden 32bit-Prozes- sehen. Das Potenzial ist da, die Einige USB-Drukker werden ebenso sor im Omega gesehen, und schon gar Software nicht. unterstützt wie USB-To-Parallel-Adap- nicht einen, der in der Lage sein soll, ter, die den Anschluss von Druckern performant auf einem 26bit-Betriebs- Auf jeden Fall bleibt festzuhalten, dass mit Parallelport erlauben. Das High- system 26bit-Programme auszuführen. das Omega-Videosystem nicht beson- light ist aber sicher der Treiber für Mas- Wie groß der dabei erreichbare ders zukunftssicher wirkt, zumal es mit senspeichergeräte wie einige Digital- Geschwindigkeitsgewinn sein kann, fest auf dem Motherboard installierten kameras, Card-Reader für CF/SD/MMC- bleibt jedenfalls abzuwarten und hängt Komponenten wie dem RAMDAC alt Karten, viele USB-Sticks, USB-CD-Bren- sehr stark von der Implementierungs- werden muss – zumindest Beschleuni- ner und so weiter. Treiber für Scanner technik ab. Bereits heute sind aller- gerfeatures wären ja durch den FPGA- sind gegen Aufpreis von David Pilling dings kommende Bandbreitenproble- Ansatz nachrüstbar. Theoretisch wäre erhältlich. me bei der Speicheranbindung abzuse- natürlich eine PCI-Videolösung à la hen, wenn der Bus zwischen Strong- IYONIX pc oder eine (entsprechend Dabei ist zu beachten, dass der IYONIX ARM, XScale und Grafikchip aufgeteilt teure) Sonderlösung wie der View- pc natürlich auf USB sehr viel stärker werden muss – bei einer maximalen Finder denkbar, dazu ist RISC OS 4 angewiesen ist als der Omega, denn Bandbreite von real etwa 800 MB/s aber natürlich nicht optimal als Imple- dem IYONIX pc gehen die sonst bringen die maximal etwa 700 MB/s, mentierungsplattform geeignet und üblichen PS/2-Schnittstellen für Maus die das Grafiksystem schlucken kann, man müsste einen weiteren PCI- und Tastatur ab. Dieses Detail ist sogar schon den bandbreitenmäßig ge- Steckplatz opfern. Insbesondere falls besonders wichtig für Besitzer eines nügsamen StrongARM (max. 66 MB/s) sich in nächster Zeit der DVI-Standard KVM-Switches, der keine USB-Unter- gehörig ins Schleudern – genau wie zur digitalen Ansteuerung von TFTs stützung hat – hier heißt es entweder früher in der vor-VRAM-Zeit ist eine weiter durchsetzt, könnte sich die in ein neues, USB-fähiges Modell in- Verlangsamung des Gesamtsystems in Entscheidung, das Videosystem des vestieren oder einen USB-PS/2-Adapter den hohen Auflösungen deutlich zu Omegas auf die Hauptplatine zu pflan- (rund 20) zu kaufen. spüren, und durch einen bandbreiten- zen, als folgenschwerer Irrtum heraus- hungrigen schnellen XScale wird diese stellen. Ähnliche potenziell interessan- Kommen wir zu den Festplatten – die Situation natürlich extrem verschärft. te Features, von denen der Omega- mangelhafte Performance des Risc PC Besitzer ausgeschlossen bleibt, wären auf diesem Gebiet ist ja schon fast Dual-Head-Support oder TV-Out. Aber legendär. Castle hat damit beim IYO- Die Grafik auch beim IYONIX pc ist man natür- NIX pc kräftig aufgeräumt, denn hier lich darauf angewiesen, dass irgendje- wird der UDMA-100-Modus unterstützt GeForce2
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