S16A User’s Guide | Registers |
SBus Addresses
The addresses listed in the figure below are offsets from the SBus slot base address. Obtain the SBus base address from the SBus host documentation. The following sections describe the S16A registers in detail.
0x0006.0000 |
| reserved |
. . . |
|
|
| not used | |
|
|
|
0x0004.00C4 |
| uart_data |
|
|
|
0x0004.00C0 |
| uart_csr |
. . . |
|
|
| not used | |
|
|
|
0x0004.0080 |
| dac_ctrl |
. . . |
|
|
| not used | |
|
|
|
0x0004.0044 |
| dio_data |
|
|
|
0x0004.0040 |
| dio_dir |
|
|
|
0x0004.003C |
| nxt_cnt_ctl_3 |
|
|
|
0x0004.0038 |
| cur_cnt_3 |
|
|
|
0x0004.0034 |
| nxt_dma_add_3 |
|
|
|
0x0004.0030 |
| cur_dma_add_3 |
. . . |
|
|
| . . . | |
|
|
|
0x0004.000C |
| nxt_cnt_ctl_0 |
|
|
|
0x0004.0008 |
| cur_cnt_0 |
|
|
|
0x0004.0004 |
| nxt_dma_add_0 |
|
|
|
0x0004.0000 |
| cur_dma_add_0 |
. . . |
|
|
| not used | |
|
|
|
0x0002.0008 | xpg_stat | not used |
|
|
|
0x0002.0004 | xpg_din | not used |
|
|
|
0x0002.0000 | xpg_reg | not used |
. . . |
|
|
| not used | |
0x0000.FFFC |
|
|
|
| |
|
| S16A ROM |
0x0000.0000 |
|
|
|
|
|
Byte
Word
0 |
| 1 | 2 |
| 3 |
|
|
|
|
|
|
| 0 |
| 1 | ||
|
|
|
|
|
|
Figure 1. S16A SBus Addresses
EDT, Inc. October, 1996 | 27 |
