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lxdream.org :: lxdream :: r240:9ae4bd697292
lxdream 0.9.1
released Jun 29
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changeset240:9ae4bd697292
parent239:e5cd6b2d4586
child241:776e46e58d6d
authornkeynes
dateFri Dec 15 10:18:39 2006 +0000 (13 years ago)
Initial implementation of the NOP (00h) command
src/asic.c
src/gdrom/ide.c
src/gdrom/ide.h
1.1 --- a/src/asic.c Fri Dec 15 10:17:30 2006 +0000
1.2 +++ b/src/asic.c Fri Dec 15 10:18:39 2006 +0000
1.3 @@ -1,5 +1,5 @@
1.4 /**
1.5 - * $Id: asic.c,v 1.19 2006-08-01 21:56:48 nkeynes Exp $
1.6 + * $Id: asic.c,v 1.20 2006-12-15 10:18:39 nkeynes Exp $
1.7 *
1.8 * Support for the miscellaneous ASIC functions (Primarily event multiplexing,
1.9 * and DMA).
1.10 @@ -311,7 +311,7 @@
1.11 idereg.device = (uint8_t)val;
1.12 break;
1.13 case IDECMD:
1.14 - if( ide_can_write_regs() ) {
1.15 + if( ide_can_write_regs() || val == IDE_CMD_NOP ) {
1.16 ide_write_command( (uint8_t)val );
1.17 }
1.18 break;
2.1 --- a/src/gdrom/ide.c Fri Dec 15 10:17:30 2006 +0000
2.2 +++ b/src/gdrom/ide.c Fri Dec 15 10:18:39 2006 +0000
2.3 @@ -1,5 +1,5 @@
2.4 /**
2.5 - * $Id: ide.c,v 1.16 2006-06-18 12:01:53 nkeynes Exp $
2.6 + * $Id: ide.c,v 1.17 2006-12-15 10:18:39 nkeynes Exp $
2.7 *
2.8 * IDE interface implementation
2.9 *
2.10 @@ -337,6 +337,13 @@
2.11 ide_clear_interrupt();
2.12 idereg.command = val;
2.13 switch( val ) {
2.14 + case IDE_CMD_NOP: /* Effectively an "abort" */
2.15 + idereg.state = IDE_STATE_IDLE;
2.16 + idereg.status = 0x51;
2.17 + idereg.error = 0x04;
2.18 + idereg.data_offset = -1;
2.19 + ide_raise_interrupt();
2.20 + return;
2.21 case IDE_CMD_RESET_DEVICE:
2.22 ide_reset();
2.23 break;
3.1 --- a/src/gdrom/ide.h Fri Dec 15 10:17:30 2006 +0000
3.2 +++ b/src/gdrom/ide.h Fri Dec 15 10:18:39 2006 +0000
3.3 @@ -1,5 +1,5 @@
3.4 /**
3.5 - * $Id: ide.h,v 1.8 2006-05-23 13:11:45 nkeynes Exp $
3.6 + * $Id: ide.h,v 1.9 2006-12-15 10:18:39 nkeynes Exp $
3.7 *
3.8 * This file defines the interface and structures of the dreamcast's IDE
3.9 * port. Note that the register definitions are in asic.h, as the registers
3.10 @@ -84,6 +84,7 @@
3.11 #define IDE_CTL_RESET 0x04
3.12 #define IDE_CTL_IRQEN 0x02 /* IRQ enabled when == 0 */
3.13
3.14 +#define IDE_CMD_NOP 0x00
3.15 #define IDE_CMD_RESET_DEVICE 0x08
3.16 #define IDE_CMD_PACKET 0xA0
3.17 #define IDE_CMD_IDENTIFY_PACKET_DEVICE 0xA1
.