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CENTurbo II Memory Map
Hier finden sie die Adressenbelegung bzw. die Speicherverteilung
des Atari Falcon mit CENTurbo II Beschleunigern. Die Adressenbelegung
ist wichtig für die Verwendung des Beschleunigers mit weiterer
Hardware.
Tabelle 29: CT2 Rev A/B/AN/BN - 32-Bit PHYSICAL ADDRESSES MAP
| Adressarea |
Function |
|
|
| $00000000-$00DFFFFF |
ST-RAM (14 MB) |
| $00E00000-$00EFFFFF |
TOS 4.0x ROM (1 MB) |
| $00F00000-$00F0FFFF |
I/O IDE (64 KB) |
| $00F10000-$00F9FFFF |
F030 BUS SLOT (576 KB) |
| $00FA0000-$00FBFFFF |
CARTRIDGE SLOT (128 KB) |
| $00FC0000-$00FDFFFF |
Not used (192 KB) Space |
| $00FF0000-$00FFFFFF |
I/O (64 KB) |
|
|
| Adressarea |
Function / Ram |
| $01000000-$02FFFFFF |
32-Bit FAST-Ram (Rev AN/BN)(32 MB) |
| $03000000-$08FFFFFF |
32-Bit FAST-Ram (Rev BN) (96 MB) |
| $04000000-$05FFFFFF |
32-Bit FAST-Ram (Rev A/B) (32 MB) |
| $06000000-$0BFFFFFF |
32-Bit FAST-Ram (Rev B) (96 MB) |
| $0C000000-$7FFFFFFF |
Reserved (1856 MB) * |
| $80000000-$EFFFFFFF |
Not used - Do not use (1792 MB) CT2 |
| $F0000000-$F3FFFFFF |
32-Bit EXP SLOT (Rev A/AN) (64 MB) |
| $F4000000-$F5FFFFFF |
BOOT FLASH 64KB (32 MB) |
| $F6000000-$F6FFFFFF |
SET UP Registers (16 MB) |
| $F7000000-$F7FFFFFF |
FAST-Ram Controller (16 MB) |
| $F8000000-$FEFFFFFF |
Reserved (112 MB) |
| $FF000000-$FFFFFFFF |
FALCON 24-Bit SHADOW (16 MB) |
Description
SET- UP REGISTERS - WRITE BYTE at $F6xx0000
ADD- NAME FUNCTION (if set to 1) REVISION
A18- FLH FLasH WRITE ENABLE B/BN
A19- E32 External Clock at 32 MHz A/AN
A20- ECO External Clock OFF A/B/AN
A21- IDE WS on IDE (Turbo only) A/B/AN/BN
A22- DSP WS on DSP (Turbo only) A/B/AN/BN
A23- CT2 BOOT on F030 (Turbo only) A/B/AN/BN
- 1-
- Data value are sent by the ADDress lines. By example : to set IDE
bit at 1, write a byte at $F6200000, where 20 is a byte composed by
A21 = 1. If you want to set DSP and IDE to 1, write to $F6600000,
where 60 is composed by A22,A21=1,1. Data value (on data bus) don't
care.
- 2-
- A RESET INSTRUCTION or HARDWARE RESET sets all bits to 0.
- 3-
- Read is not possible : use a variable in memory.
- 4-
- Externam CLOCK (Bit ECO) is not recommended on Rev B/BN. External
clock from CT2 B is not wired on some fitting because of a recently
discovered disturbance of the DSP clock ! It is not recommended to use
this feature that will no longer be supported ! Don't offer it in the
setup of Rev B/BN ! Write bit to 1.
- 5-
- FLH,E32 & ECO are available in NORMAL mode too !
- 6-
- Bit E32 : 0 = 36 MHz / 1 = 32 MHz on Rev A/AN.
Rev B as only 32 MHz (no E32 bit).
Rev BN has no clock at all (no E32 & ECO)!
- FAST-Ram CONTROLLER REGISTERS
- Rev A/AN : BYTE WRITE at $F730C788
Rev B/BN : BYTE WRITE at $F700000x
- Rev A/AN
-
Write a BYTE at $F730C788 : this value will be latched by the
controller. Use only this address. Any other access to $F7x will
modify the controller configuration and may crash the CT2A/AN if the
FAST-Ram is already used ! Only 16 and 32MB EDO SIMM can be used.
- Rev B/BN
-
The memory controller must be configured regarding the size of EDO
that is used : A BYTE write to $F7000000= 16/32MB SIMM $F7000001=
64/128MB SIMM
In general a 32MB SIMM is a doubled 16MB SIMM and a 128MB is a
doubled 64MB SIMM. But, about 64MB there is a type that needs to be
used with the 16/32 configuration, because of a different matrix in
the chips and a different wiring of the chips on the SIMM. Those 64MB
SIMM are rare... The memory test is a little complex : elimination
method from the biggest memory size case (128 MB : the upper 64MB
window) must be practiced.
Any technical information (c) Rodolphe Cezuba
Copyright © Robert Schaffner (support@doitarchive.de)
Letzte Aktualisierung am 23. Dezember 2003
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