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Milan Hardwareregister und I/O Adressen
Memory layout:
| Adress |
Description |
|
|
| $00000000 |
_phystop ST-RAM |
| $00E00000 |
$00E7FFFF TOS |
| $01000000 |
_ramtop TT-RAM |
|
|
| $40000000 |
$7FFFFFFF PCI memory, overlayed with ISA memory[1] |
| $80000000 |
$BFFFFFFF PCI I/O, overlayed with ISA I/O[1] |
| $C0000000 |
$C000DFFF PCI/ISA I/O using big endian addressing |
| $FFFF8000 |
$FFFFBFFF used by ST hardware emulation |
| $FFFFC000 |
$FFFFDFFF Milan onboard I/O |
| $FFFFC000 |
memory controller |
| $FFFFC103+4*reg_no |
MFP |
| $FFFFC200 |
PLX 9080 |
| $FFFFE000 |
$FFFFFFFF used by ST hardware emulation |
[1] PCI memory and IO are subtractively decoded, ie. any access
that is not claimed by a PCI device is forwarded to the ISA bus.
ISA IO:
byte read adr: read from $C0000000+adr or read from
$80000000+(adr^3)
byte write adr: write to $C0000000+adr or write to
$80000000+(adr^3)
('adr' is an address on the ISA bus, eg. $278 for parallel port)
word read adr: read from $80000000+(adr^2) or read from
$C0000000+adr [2]
word write adr: write to $80000000+(adr^2) or write to
$C0000000+adr [2]
[2] When using $C0000000 for WORD I/O, the data read/written needs
to be swapped (ror.w #8,d0)
Used ISA addresses:
| Adress |
Description |
|
|
| $20 |
ISA interrupt controller |
| $60 |
Keyboard |
| $A0 |
ISA interrupt controller |
| $15C |
PC87308 SuperIO configuration registers |
| $1F0 |
primary IDE interface |
| $170 |
secondary IDE interface |
| $278 |
Parallel port |
| $2A0 |
serial port 3 (optional) |
| $2A8 |
serial port 4 (optional) |
| $2F8 |
serial port 2 |
| $3F0 |
Floppy disk controller |
| $3F8 |
serial port 1 (!nl) |
| $400-$420 |
onboard (SuperIO etc.) |
ISA Interrupts:
ISA Interrupt vectors are located at $140+4*isa_int_vector. You
must use Setexc() to set the vector, because otherwise the interrupt
is not enabled in the interrupt controller. Restore the old vector
using Setexc() when uninstalling your driver.
The interrupt routine must end with an RTE instruction, and does
not have to do anything special about the interrupt controller - EOI
handling is done by TOS.
Original ST MFP GPIO-Port:
| BIT |
DIR |
|
|
|
|
| 0 |
IN |
Centronics BUSY |
| 1 |
IN |
MFP serial port DCD |
| 2 |
IN |
MFP serial port CTS |
| 3 |
IN |
GPU DONE from blitter |
| 4 |
IN |
MIDI/keyboard ACIA interrupt |
| 5 |
IN |
FDC/ACSI interrupt |
| 6 |
IN |
MFP serial port RI |
| 7 |
IN |
monochrome detect signal |
MILAN MFP GPIO-Port:
| BIT |
DIR |
|
|
|
|
| 0 |
OUT |
* MFP serial port RTS |
| 1 |
IN |
MFP serial port DCD |
| 2 |
IN |
MFP serial port CTS |
| 3 |
OUT |
* MFP serial port DTR |
| 4 |
IN |
* MFP serial port DSR |
| 5 |
IN |
* not used |
| 6 |
IN |
MFP serial port RI |
| 7 |
IN |
* KEYLOCK switch |
ISA Interrupts
| No. |
Interrupt |
|
|
| 0 |
Timer |
| 1 |
keyboard |
| 3 |
87308 serial port 2 |
| 4 |
87308 serial port 1 |
| 5 |
available |
| 6 |
FDC |
| 7 |
printer port |
| 8 |
RTC |
| 9 |
available |
| 10 |
available |
| 11 |
available |
| 12 |
PS/2 mouse port |
| 13 |
available |
| 14 |
PCI IDE primary channel |
| 15 |
PCI IDE secondary channel |
ISA I/O functions:
#define inb(port) (*(volatile UBYTE *)(0xC0000000L + (port))))
#define inw(port) (*(volatile UWORD *)(0x80000000L + (port)^2)))
#define outb(data, port) *(volatile UBYTE *)(0xC0000000L + (port)) = data;
#define outw(data, port) *(volatile UWORD *)(0x80000000L + (port)^2) = data;
Informationen von Frank Naumann
Copyright © Robert Schaffner (doit@doitarchive.de)
Letzte Aktualisierung am 23. Mai 2004
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