SMC Networks SMC91C95 Manuel d'utilisateur télécharger pdf (Page 46)

I/O SPACE - BANK0

OFFSET NAME TYPE SYMBOL

8 MEMORY INFORMATION

READ ONLY MIR

HIGH

BYTE

FREE MEMORY AVAILABLE (IN BYTES * 256 * M)

0 0 0 1 1 0 0 0

LOW

BYTE

MEMORY SIZE (IN BYTES *256 * M)

0 0 0 1 1 0 0 0

FREE MEMORY AVAILABLE - This register can

be read at any time to determine the amount of

free memory. The register defaults to the

MEMORY SIZE upon reset or upon the RESET

MMU command.

MEMORY SIZE - This register can be read to

determine the total memory size, and will always

read 18H (6144 bytes) for the SMC91C95.

MEMORY SIZE

M ACTUAL MEMORY

SMC91C90 FFH 1 64 kbytes

SMC91C90 40H 1 16 kbytes

SMC91C92/4 12H 1 4608 bytes

SMC91C95 18H 1 6144 bytes

SMC91C100 FFH 2 128 kbytes

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 138 139

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SMC Networks SMC91C95 Manuel d'utilisateur Page 46