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Correct the hardware implementation details
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Matt Harlum 2025-10-19 09:35:34 +13:00
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README.md
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@ -102,13 +102,14 @@ There are several options for larger drive support
Also make sure to use the "Quick Format" option when formatting such partitions Also make sure to use the "Quick Format" option when formatting such partitions
## Hardware implementation ## Hardware implementation
* IDECS1 is asserted when A12 is low and the IDE device's base address is decoded * IDECS1 asserted at offset 0x1000
* IDECS2 is asserted as above but when A13 is low rather than A12 * IDECS2 asserted at offset 0x2000
* IDECS2 can instead be routed to a second IDE channel as it's IDECS1 and the driver will detect this * A secondary channel is supported when the second channel's IDECS1 is decoded at offset 0x2000 and IDECS2 of both primary and secondary channels is pulled high
* IDE interface is byte-swapped
* Buffered interface
* D15/14 pulled up with a 10K resistor to allow detection of floating bus when no drive present. * D15/14 pulled up with a 10K resistor to allow detection of floating bus when no drive present.
* IDE A0/1/2 connected to CPU A9/10/11 providing 512 Byte separation of registers to allow for MOVEM trick * IDE A0/1/2 connected to CPU A9/10/11 providing 512 Byte separation of registers to allow for MOVEM trick
* No interrupts
* IDE interface is byte-swapped
* Buffered interface
* Configure as a 128K board to permit loading CDFS from ROM **(Optional)** * Configure as a 128K board to permit loading CDFS from ROM **(Optional)**
* Hardware support of programming the flash **(Optional)** * Hardware support of programming the flash **(Optional)**