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65 lines
1.8 KiB
Markdown
65 lines
1.8 KiB
Markdown
The BMac is an Ethernet controller featured in G3 and early G4 Macs. As described by a Linux contributor, this controller "appears to have some parts in common with the Sun "Happy Meal" (HME) controller".
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The max frame size is 0x5EE bytes.
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It resides on 0xF3011000, with Writing DMA on 0xF3008200 and Reading DMA on 0xF3008300.
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## Register Map
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| Register Name | Offset |
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|:-------------:|:------:|
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| XIFC | 0x000 |
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| TXFIFOCSR | 0x100 |
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| TXTH | 0x110 |
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| RXFIFOCSR | 0x120 |
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| MEMADD | 0x130 |
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| XCVRIF | 0x160 |
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| CHIPID | 0x170 |
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| MIFCSR | 0x180 |
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| SROMCSR | 0x190 |
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| TXPNTR | 0x1A0 |
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| RXPNTR | 0x1B0 |
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| STATUS | 0x200 |
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| INTDISABLE | 0x210 |
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| TXRST | 0x420 |
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| TXCFG | 0x430 |
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| IPG1 | 0x440 |
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| IPG2 | 0x450 |
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| ALIMIT | 0x460 |
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| SLOT | 0x470 |
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| PALEN | 0x480 |
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| PAPAT | 0x490 |
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| TXSFD | 0x4A0 |
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| JAM | 0x4B0 |
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| TXMAX | 0x4C0 |
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| TXMIN | 0x4D0 |
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| PAREG | 0x4E0 |
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| DCNT | 0x4F0 |
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| NCCNT | 0x500 |
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| NTCNT | 0x510 |
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| EXCNT | 0x520 |
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| LTCNT | 0x530 |
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| RSEED | 0x540 |
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| TXSM | 0x550 |
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| RXRST | 0x620 |
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| RXRST | 0x620 |
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| RXCFG | 0x630 |
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| RXMAX | 0x640 |
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| RXMIN | 0x650 |
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| MADD2 | 0x660 |
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| MADD1 | 0x670 |
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| MADD0 | 0x680 |
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| FRCNT | 0x690 |
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| LECNT | 0x6A0 |
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| AECNT | 0x6B0 |
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| FECNT | 0x6C0 |
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| RXSM | 0x6D0 |
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| RXCV | 0x6E0 |
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| HASH3 | 0x700 |
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| HASH2 | 0x710 |
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| HASH1 | 0x720 |
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| HASH0 | 0x730 |
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| AFR2 | 0x740 |
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| AFR1 | 0x750 |
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| AFR0 | 0x760 |
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| AFCR | 0x770 | |