IDE rozhrani

[Hugo KOTTAS]

> Navrhovane reseni by mohlo byt zajimave i pro vysavacovy robot jehoz
stavba se tu rozbiha :-)


Pro byt 100m2 je to 100m x 1m=
100 000mm x 1000 mm = 100 000 000 mm2.


Pro mapovani prostoru dnes stale jeste velkeho bytu
100m ctverecnich je potreba, pozadujeme li namapovat
kazdy milimetr, 100 Mbyte dat (plus nejake ztraty na
mapovani tabulek)
Dalsi uvaha do dokonalosti samoLUXu.

1 byt (kvartyr)                                   100Mbyte
1 panelak  a 50 bytu (kvartyru)            5Gbyte

Takze jeden disk by byl pro dva panelaky pri mapovani pouze
1cm2 pro !petset kvartyru!!! s informacni hodnotou 256 vah
ci 8 bitu na mapovaci jednotku (1mm2 nebo 1cm2).
To by se sousedi mohli pridat a take neco zaplatit.
No a je nutno dodelat jezdeni po schodech.

Stara jednotka kvartyr je nutna pro odliseni od jednotky byte.
Jedna urcuje misto bydleni druha mnozstvi informaci.

>Sam bych potreboval poradit s hardverem ATAPI rozhrani, zejmena uvitam
odpovedi na nasledujici otazky:
>1)Schema zapojeni ATAPI radice stare koncepce, pro ISA sbernici.

Jsou to jen budice sbernice a kabelove prijimace aktivovane CS pro HDD.

>Jak je obsluhovana ledovka cinnosti Harddisku?

Vetsinou od CS pro disk na karte interface pro HDD.


>2)Jak je to s terminatory na vlastnim HD, zavisi na konfiguraci
mastr/slejv? Jsou i na INTRQ,IOCS...

ATAPI nema externi terminatory - resp. neni treba se o ne starat.

>3)Co udelat s rozhranim abych mohl vyuzivat cable.select signal, drive
zrejmne nepodporovany?



5.2.15.2. CSEL (Cable select) (Optional)
The device is configured as either Device 0 or Device 1 depending upon the
value of CSEL:
If CSEL is negated then the device address is 0
If CSEL is asserted then the device address is 1
CSEL shall be maintained at a steady level for at least 31 seconds after the
negation of RESET-.
Implementor's Note:
Special cabling can be used by the system manufacturer to selectively ground
CSEL e.g. CSEL of Device 0 is connected to the CSEL conductor in the cable,
and is grounded, thus allowing the device to recognize itself as Device 0.
CSEL of Device 1 is not connected to CSEL because the conductor is removed,
thus the device can recognize itself as Device 1.


                    +------ CSEL Conductor --------------------------+

                    |                                   |
Open

                    |Ground                      |                   |

                 +------+                   +----------+        +----------+

                 | Host |                   | Device 0 |        | Device 1 |

                 +------+                   +----------+        +----------+



                    +------ CSEL Conductor --------------------------+

                    |                          Open                  |

                    |Ground                      |                   |

                 +------+                   +----------+        +----------+

                 | Host |                   | Device 1 |        | Device 0 |

                 +------+                   +----------+        +----------+

Figure 4 - Cable Select Example


>4)Lze data (sektory) prenaset na HD s vyloucenim podpory DMA?

Ano, dokonce to umi jen "nove disky". (jak ten cas leti)

>5)Mohu predpokladat ze moderni HD nema spatne sektory (ze je sam vymeni za
dobre)?

NE i kdyz to vetsinou vyjde.