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Scelga La CPU RISC Rico Sinonimo Di "Nuovo E Veloce", Scontro

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Scelga La CPU RISC Rico Sinonimo Di Direttore Responsabile Pierantonio Palerma Coordinamento editoriale Claudio De Falco Coordinamento Tecnico e Redazionale Romano Tenca (te1 02166034 260) Redazione Marna Risani (te1 02166034 319) Carlo Santagostino (On Disk) Segreteria di redazione Roberta Bottini (te1 02166034 240) (fax 02166034 238) Coordinamento Grafico Marco Passoni Impaginazione elettronica Laura Guardinceri Copertina SiIvana Cocchi Grafica pubblicitaria Renata Lavizzari Collaboratori Roberto Attias Hinter Brinqer Vincenzo Gervasi Marco Ruocco Sergio Ruocco Matteo Tenca Marco Zandonadi RISC PER TUTTI IL NUMERO UNO NEU RMP SPECWiUll Per Amiga Technologies sarà stata un'estate Presidente Peter P Tordoir di fuoco. Mentre noi gustavamo meritati giorni Amministratore Delegato Pierantonio Palerma Periodici e Pubblicità Peter Goldsten d'ozio, in Germania e in tutto il resto del Publisher Assistant Italo Cattaneo Coordinamento Operativo Antonio Parrnendola mondo si muovevano produttori e distributori Marketing c,:r ,. : I i3 i :i.. Pubblicità l' i i '.li// . .; 12 ;1 ;J .l- per garantire il ritorno sul mercato di Amiga. SEDE LEGALE L'effetto Escom ha già dato i suoi frutti e già via Cornaggia.10 - 20123 Milano prima dell'estate tutto il mercato Amiga si è ri- DIREZIONE - REDAZIONE via Gorki 69 20092 Cinselo Balsamo (M) te1 02166034 260 fax 02166034 290 svegliato dal sonno di quest'ultimo anno. Ora PUBBLICITA tutti gli occhi sono puntati su Amiga Techno- via Gorki 69 20092 Cinselo Balsamo (MI) te1 02166034 246 logies, sulla sua capacità di offrire prodotti ad INTERNATIONAL SALES AND MARKETING Cnzia Martelli (te1 02166034 205) elevata tecnologia a prezzi competitivi. L'immediata adozione del 68060 appare una UFFICIO ABBONAMENTI scelta molto saggia: permette di ottenere via Gorki, 69 - 20092 Cinisello Balsamo (MI) drammatici guadagni di velocità senza gros- Per informazioni sull'abbonamento ricerca automatica se perdite in termini di compatibilità. È però il - fax 02166034.482 Non saranno evase richieste di numeri arretrati RISC ciò che consentirà ad Amiga di rilan- antecedenti un anno dal numero in corso. Per sottoscrizione abbonamenti utilizzare il ciarsi ed è per questo che abbiamo voluto c/c postale 1889.3206 intestato a Gruppo Editoriale Jackson, casella postale 68 dedicare il dossier di questo mese all'esame 20092 Cinisello Balsamo (Milano). delle possibilità offerte da tale tecnologia e- mergente. Prezzo della rivista L.14.000 (arretrati L.28.000) Abbonamento annuo L. 92.000 Estero L. 184.000 Romano Tenca Stampa SATE Zingonia - Verdelino (BG) Fotolito Foligraph (Milano) Distribuzione Parrni & C S r L - piazza Colonna 361 00187 Roma li Gruppo Editoriale Jackson e iscritto a Registro Nazionale della stampa al N 4863 in data 221411995 Spedizione in abbonamento postale 150 Aut Trib di Milano n 102 del 201211988 O Tutti i diritti di riproduzione o di traduzione degli articoli pubblicati sono riservati Manoscritti, disegni e fotografie non SI restituiscono Il Gruppo Editoriale Jackson pubblica anche le seguenti riviste: Automazione Oggi - Bit - Elettronica Oggi - Eo News - Fare Elettronica - Imballaggio - Imballaggio News - Informatica Oggi & Unix - Inquina- Mensile associato Consorzio mento - Lan e Telecom Market Espresso - Market Espresso Flash - Meccanica Oggi - Micro & Soft - PC @ 111 stampa Floppy - PC Magazine Progettare - Rivista di Meccar3ica - Rivista di Meccanica International Edition - Stru Unione Stampa Specializzata Periodica Italiana Tecnica menti Musicali -Trasporti Industriali -Watt ANNO 8 e NUMERO 70 e SETTEMBRE 1995 I lettori ci scrivono Dalla stampa di tutto il mondo IO Il mistero RISC RISC e Amiga 19 RECENSIONI RUBRICHE Directory Opus 5.1 1 23 Funzioni esterne 60 Genius 2.5 29 Deluxe Paint V 51 Le strutture dati 63 Micronik Amiga 1 200 Tower 55 CD-ROM e Atapi-Device 68 Modem Jet 28800 58 I giochi del mese 73 LE PAGINE DEL PROGRAMMATORE I programmi su disco 75 TRANSACTION Eliminazione delle facce nascoste (parte I) 35 Servizio inserzioni gratuite 79 Interfacciamo Amiga! Il software (parte IV) L'arte della programmazione assembly (parte Il) 44 3.1 Developer Update (parte X) 48 CD-ROM E A590 pla i controller più scarsi come A2091 sono da escludere. [P.C.] Posseggo un A500 con 3 Mb di RAM e controller Commodore A590 che contie- ne un hard disk Quantum 40 Mb, Kick- start 1.3, stampante STAR LC-20 9 aghi. Mi sapreste dire perché è così raro leg- Vorrei acquistare un lettore CD-ROM da gere sulle riviste le prestazioni dei mi- collegare al mio computer, ma non so re. Sul numero 62 di Amiga Magazine, croprocessori in termini accettabili co- che cosa occorre. Mi spiego: so che il alla fine del report sullo SMAU è citato me MIPS e MFLOPS? A me "transazioni mio controller supporta i lettori CD- un negozio di Napoli che vende cabinet per secondo" non dice assolutamente ROM, ma vorrei sapere esattamente co- e cavi SCSI adatti. niente, quanto a SPEC così e SPEC sa serve per poterlo collegare ad esso. Con il lettore deve essere acquistato il colà, che posso pensarne, mi sembrano Inoltre so che serve un filesystem per cavo di alimentazione a 220 V e un ca- tante varietà di salumi. Perché non pub- leggere i CD-ROM e dato che non rie- vo SCSI esterno, del tipo da 25 poli a 50 blicate, ogni tanto, una piccola classifi- sco a procurarmelo perché Amiga Ma- poli (è ovvio che il connettore a 50 poli ca per prestazioni dei microprocessori? gazine non ne include uno di pubblico deve avere la stessa forma di quello Spero che il mondo Amiga sappia per- dominio nel dischetto allegato alla rivi- scelto per il lettore o cabinet). Questo suadere Escom a mirare più in alto che sta? Potete indicarmi un lettore CD- cavo è perfettamente identico a quello si può, e seguire una politica aggressi- ROM per il mio computer che in futuro usato su alcuni modelli di Apple Macin- va; anzi, spero che non ci sia affatto bi- sarà possibile collegare a un A4000? tosh (come SE/30), ed è chiamato "cavo sogno di persuaderla. Correggetemi se Vincenzo Morelli, Napoli. sistema SCSI": per questo motivo i letto- sbaglio, ma dopo aver realizzato i primi ri SCSI2 Apple funzionano anche con dieci esemplari del microprocessore più Collegare un lettore CD esterno all'A590 A590. Il cavo sistema è incluso nella potente al mondo, i successivi dieci mi- è davvero molto facile, e il procedimen- confezione dei lettori portatili NEC, as- lioni di esemplari non sono dieci milioni to è identico per A3000, A2091, GVP sieme all'alimentatore. di manciate di sabbia con cui diluire i Series IIe altri controller SCSI compati- Non c'è bisogno di altri accessori: i kit costi di base e rendere il prodigioso bili al 100% con le specifiche Commo- di collegamento che a volte vengono "accessibile "? dore. proposti non servono su Amiga. Nel ca- Vincenzo Vinci, Taranto Chi non vuole avere pensieri, e può per- so di Vincenzo Morelli non bisogna mettersi la spesa, deve solo acquistare preoccuparsi d'altro: jumper e switch Basta chiedere e noi esaudiamo! A AmigaOS 3.1 e un lettore NEC portatile dell'A590 vanno lasciati come sono, e i qualche pagina di distanza da questa (per esempio il CDR400 3xp, vanno be- lettori CD escono dalla scatola già con- risposta potrà trovare la tabella che cer- ne tutti i modelli oggi in listino). Con il figurati in modo corretto (eccetto i mo- ca, con prestazioni espresse in salumi ... Workbench 3.1 è fornito il software, e delli Apple, che sono privi di terminato- pardon, SPEC. col NEC tutto I'hardware preconfigurato. re). Al massimo è necessario cambiare MIPS e MFLOPS ultimamente sono in ri- Basta attaccare un cavo e fare click su gli interruttori o jumper del numero di ID basso perché ormai tutti gli esperti con- un'icona per concludere l'installazione: SCSI del lettore (di solito 5 è il più adat- cordano nel ritenerli degli anacronismi o una soluzione perfetta (se nel proprio si- to). Quando il lettore è collegato non bi- peggio: delle vere e proprie truffe. Trop- stema non si nascondono difetti occul- sogna mai salvare le modifiche all'usci- po spesso processori che vantano nu- ti). Per sfruttare meglio questo hardware ta di HDtoolbox, altrimenti da quel mo- meri esorbitanti di MIPS e MFLOPS si "di lusso" conviene comperare in segui- mento l'Amiga "non parte" se manca il sono rivelati vistosamente più lenti dei to un file system commerciale per CD- CD-ROM nel lettore. concorrenti. Questi parametri, che e- ROM. Per il filesystem esistono molte soluzio- sprimono il numero di "istruzioni" (ma Altrimenti la strada è un po' più lunga. Il ni: acquistando una delle innumerevoli quali? Ogni produttore ha le sue idee) lettore da acquistare dovrebbe essere raccolte PD per Amiga leggibili anche eseguite in un certo periodo di tempo, del tipo esterno con interfaccia rigoro- su MS-DOS (nelle nostre recensioni possono forse avere significato compa- samente SCSI2: è una garanzia di buon questa possibilità è sempre citata), si rando microprocessori della stessa fa- collegamento a qualsiasi computer. Va può trasferire l'archivio del file system miglia, ma certamente non servono per bene anche qualche vecchio lettore SC- su un dischetto da 720 kb usando il PC confrontare CPU con filosofie e architet- SI, ma allora deve sempre essere pro- compatibile munito di lettore di un cono- ture completamente diverse. vato a fondo direttamente con Amiga. Si scente. Le versioni recenti di AmigaOS La questione della validità dei bench- può scegliere un lettore per montaggio leggono direttamente i floppy MS-DOS, mark è annosa e ancora oggetto di di- interno (come il Sony CDU55S o il NEC ma poiché Vincenzo usa ancora il Kick- battiti, anche per l'importanza commer- CDR201), acquistando anche un cabi- start 1.3 c'è bisogno di uno dei pac- ciale del problema. Oggi invece dei test net SCSI dotato di alimentatore e piatti- chetti PD creati a questo scopo: Messy- sintetici (per esempio Dhrystone), che na adattatrice, che trasforma il connet- DOS, la versione dimostrativa di Cros- andavano di moda negli anni scorsi, si tore SCSI del tipo interno in uno del tipo sDOS, o al limite l'orrendo PCutil sul di- preferiscono calcolare indici di presta- esterno.
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