Rejestr MMU $FF00 - opis
: 05 mar 2010, 17:46
Cześć.
Ostatnio miałem problem z konfiguracją MMU, ale dałem rady dzięki temu:
bit 0 - I/O Block = 0, RAM or ROM (as selected by bits 4-5) = 1
bit 1 - ($4000-7FFF) BASIC ROM (low) = 0 , RAM = 1
bit 2-3 - ($8000-BFFF)
00 - BASIC & ML monitor ROM
01 - Internal function ROM
10 - External function ROM
11 - RAM
bit 4-5 - ($C000-FFFF)
00 - Kernal & character ROM
01 - Internal function ROM
10 - External function ROM
11 - RAM (bit 0 determines the contents of $D000-DFFFF)
bit 6-7 (RAM Block)
Block 0 - 00
Block 1 - 01
Block 2 - 10
Block 3 - 11
Pozdrawiam.
Ostatnio miałem problem z konfiguracją MMU, ale dałem rady dzięki temu:
bit 0 - I/O Block = 0, RAM or ROM (as selected by bits 4-5) = 1
bit 1 - ($4000-7FFF) BASIC ROM (low) = 0 , RAM = 1
bit 2-3 - ($8000-BFFF)
00 - BASIC & ML monitor ROM
01 - Internal function ROM
10 - External function ROM
11 - RAM
bit 4-5 - ($C000-FFFF)
00 - Kernal & character ROM
01 - Internal function ROM
10 - External function ROM
11 - RAM (bit 0 determines the contents of $D000-DFFFF)
bit 6-7 (RAM Block)
Block 0 - 00
Block 1 - 01
Block 2 - 10
Block 3 - 11
Pozdrawiam.