Ustrojstvo rabochej stancii Motorola 922
Stanciya sostavlena iz dvuh modulej: modulya so SCSI
ustrojstvami i modulya CPU s sistemnymi platami formata VME.
Krepyatsya oni drug k drugu na zashchelkah, bez boltov i gaek. Dlya
razborki: otcepit' perehodnik SCSI i perehodnik pitaniya szadi.
Otorvat' verhnyuyu kryshku, prizhat' dve zashchelki speredi mezhdu
dvumya modulyami, i otorvat' perednyuyu panel' SCSI modulya. Prizhat'
sprava planku-zashchelku mezhdu modulyami, posle etogo verhnij blok
mozhno legko otstykovat'. Dalee analogichno.
Nizhnij modul' CPU. SHina rasshireniya formata VME na 4 slota
1. Plata vvoda-vyvoda:
RS232c 4 porta s raz容mami RJ-45
Kontroller ethernet e1x70 Twisted pair/AUI
Transiver AUI->BNC prilagaetsya
Kontroller SCSI-2
Parallel'nyj port Centronix imeetsya, ne vyveden naruzhu
po prichine otsutstviya mesta na planke platy
2. Sistemnaya plata processora: MVME197LE
50 Mhz RISC processor mc88110
Operativnaya pamyat' DRAM 32/64 Mb
VME terminator
3. Vtoraya plata ethernet: MVME376
Kontroller ethernet m3760 AUI
Transiver AUI->BNC prilagaetsya
4. Odin slot VME svoboden.
Verhnij yashchik - vstroennye SCSI ustrojstva
0. Seagate disk 1Gb (ili 2Gb)
1. Seagate disk 1Gb (ili 2Gb)
4. Strimmer QIC 5-dyujmov (lenty 120, 155, 250, 525 Mb)
6. CD-ROM
V kazhdom yashchike imeetsya sobstvennyj impul'snyj blok pitaniya 190
Vatt. Ispol'zovanie rabochej stancii bez UPS nastoyatel'no ne re-
komenduetsya. Potreblyaemaya moshchnost' 7A pri 220V. AC Power
Rating 0.6 . Istochnik besperebojnogo pitaniya 400 VA.
Konsol'nyj terminal Motorola. |mulyaciya vt220, wyse60.
Skorostrel'nost' processora 80000 Checkit'ovskih dhryston'ov
(t.e. 2.8*486dx2/66, 1.6*P60, 1.1*P90)
Predpolagaemaya zagruzka
4 programmista :-)
6-10 graficheskih pol'zovatelej (X-terminalov)
20-80 "tekstovyh" pol'zovatelej
(alfavitno-cifrovye terminaly, telnet-sessii)
15-30 MSDOS/NFS-klientov
Vozmozhnosti rasshireniya.
Odin svobodnyj VME slot.
SCSI shina. Ostalos' mesto dlya 3 ustrojstv.
VOPROS: SCSI-2. Mozhno li podklyuchat' 14 ustrojstv?
otvet: Net. V opisatelyah diskov upomyanut tol'ko
SCSI Taget number, i ni slova pro LUN
(Logical Unit Number)
VOPROS: Kakie imenno diski mozhno podklyuchat'?
otvet: Seagate, ostal'nye, vidimo, tozhe, esli udastsya
opisat' geometriyu diska.
sm. fajl /etc/*disk*
Operativnaya pamyat':
Plata processora MVME197LE pozvolyaet imet' 32/64 Mb
Plata processora MVME197SP/DP pozvolyaet imet' 128/256 Mb
Processor PowerPC:
Teoreticheski vozmozhna zamena platy s mc88110 na platu s PowerPC
Mnogoprocessornaya konfiguraciya:
Motorola 922 mozhet imet' do 4 processorov.
Platy VME dlya Motoroly 922:
MVME 328xt-1, 328xt-2: Kontroller SCSI-2
1 ili 2 SCSI porta dlya podklyucheniya do 7-14 ustrojstv.
8/16-portovye terminal'nye servery.
Podklyuchayutsya na ethernet.
VOPROS: Nazvanie?
MVME 332xt: 8 portovyj mul'tipleksor
8 asinhronnyh portov EIA232D(RS232C) na 38400, raz容my RJ-45,
1 parallel'nyj port Centronix (db25)
Zanimaet dva slota VME
MVME 333: 6-portovyj intellektual'nyj WAN kontroller
4 polnodupleksnyh posledovatel'nnyh porta (db25) s DMA kontrolem
MVME 334a: 6-portovyj universal'nyj intellektual'nyj
WAN kontroller
MVME 338: Plata podklyucheniya terminal'nyh serverov
MVME 339: Plata podklyucheniya terminal'nyh serverov
MVME 376: Plata ethernet
VME platy s processorom. Dopustimo do 4-h processorov.
NARASHCHIVANIE DOPOLNITELXNYH MODULEJ.
"YAshchiki" dlya vstroennyh SCSI ustrojstv "rastut" vverh
"YAshchiki" VME rasshireniya "rastut" vniz
VOPROS: kak perebrasyvaetsya VME shina na sleduyushchij yashchik?
OTVET: na dnishche modulya VME imeetsya kontaktnyj raz容m.
V podstavke-osnovanii raspolozhen VME terminator.
Raspaj RJ45 portov RS232 na Motorole 922.
12345678
b--__--d
1 DCD <---- Carier detect
2 RTS ----> Ready to send (Host: "gotov" )
3 SG Signal ground
4 TxD ----> Transmit
5 RxD <---- Receive
6 SG
7 CTS <---- Clear to send (Modem: "gotov" )
8 DTR ----> Data terminal ready (Host: "vklyuchen")
Dlya nul'modemnogo soedineniya nuzhno ispol'zovat' "perevernutyj"
kabel' RJ45-RJ45 Reversed 30-w2482d (1->8,2->7,...,8->1)
Perehodniki RJ45-DB25 dlya PEREVERNUTOGO kabelya
30-W2486D02 30-W2486D01
Modemnyj perehodnik Nul'-modemnyj perehodnik
1 -------> 20 DTR 1 DTR ---+---> 6 DSR
+---> 8 DCD
2 <------- 5 CTS 2 CTS <------- 4 RTS
3 ---+---- 7 SG 3 SG ---+---- 7 SG
6 ---+ 6 SG ---+
4 <------- 3 RxD 4 RxD <------- 2 TxD
5 -------> 2 TxD 5 TxD -------> 3 RxD
7 -------> 4 RTS 7 RTS -------> 5 CTS
8 <------- 8 DCD 8 DCD <------- 20 DTR
Perehodniki RJ45-DB25 dlya PRYAMOGO kabelya
Modemnyj perehodnik Nul'-modemnyj perehodnik
1 <------- 8 DCD 8 DCD <------- 20 DTR
2 -------> 4 RTS 7 RTS -------> 5 CTS
3 ---+---- 7 SG 3 SG ---+---- 7 SG
4 ---+ 6 SG ---+
5 -------> 2 TxD 5 TxD -------> 3 RxD
6 <------- 3 RxD 4 RxD <------- 2 TxD
7 <------- 5 CTS 2 CTS <------- 4 RTS
8 -------> 20 DTR 1 DTR ---+---> 6 DSR
+---> 8 DCD
Pochemu zhe tak mnogo perehodnikov? A potomu chto na raz容me RJ-45
*net* signala DSR. V modemnom kabele on i ne nuzhen, a v
nul'modemnom prihoditsya soedinyat' ego pryamo na raz容me DB-25
(ili DB-9) s DCD. Takim obrazom, vyhod DTR okazyvaetsya
soedinennym srazu i so vhodom DCD, i so vhodom DSR.
Sm. Table B-1 - B-8 on Appendix B in "Systems". Series 900
Reference guide, tam vse pravil'no. I narisovano, s kakoj sto-
rony u RJ-45 noga 1.
Last-modified: Sun, 31 Aug 1997 19:22:48 GMT