70 lines
No EOL
1.5 KiB
Text
70 lines
No EOL
1.5 KiB
Text
@guard _DISK_DSS_
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@define DISK_INTERFACE_ADDR 0x1580
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@group DiskMode
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READ 0x00
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WRITE 0x01
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@end
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@group DiskSignals
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START 0x00
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CANCEL 0x01
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IGNORE 0xFF
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@end
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@group DiskStatus
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FREE 0x00
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WRITING 0x01
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READING 0x02
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@end
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@group DiskRegisters
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SIGNAL 0x00
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MODE_SELECTOR 0x01
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DISK_SELECTOR 0x02
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SECTOR_SELECTOR 0x03
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ADDRESS_SELECTOR 0x05
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DATA_SIZE 0x07
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MEMORY_ADDRESS 0x09
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RO_STATUS 0x0B
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RO_CURRENT_DISK 0x0C
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RO_CURRENT_SECTOR 0x0D
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RO_CURRENT_ADDRESS 0x0F
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RO_REST_DATA_SIZE 0x11
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RO_MEMORY_ADDRESS 0x13
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@end
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@struct DiskDriverData
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Mode:1 > 0x00
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Disk:1 > 0x00
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Sector:2 > 0x00, 0x00
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Address:2 > 0x00, 0x00
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DataSize:2 > 0x00, 0x00
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MemoryAddress:2 > 0x00, 0x00
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@end
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.code
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_disk_load_from_ddd_blocking:
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arg R1
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movb [{DISK_INTERFACE_ADDR + DiskRegisters.MODE_SELECTOR}], *R1
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inc R1
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movb [{DISK_INTERFACE_ADDR + DiskRegisters.DISK_SELECTOR}], *R1
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inc R1
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mov [{DISK_INTERFACE_ADDR + DiskRegisters.SECTOR_SELECTOR}], *R1
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addip R1, 2
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mov [{DISK_INTERFACE_ADDR + DiskRegisters.ADDRESS_SELECTOR}], *R1
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addip R1, 2
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mov [{DISK_INTERFACE_ADDR + DiskRegisters.DATA_SIZE}], *R1
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addip R1, 2
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mov [{DISK_INTERFACE_ADDR + DiskRegisters.MEMORY_ADDRESS}], *R1
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movb [{DISK_INTERFACE_ADDR + DiskRegisters.SIGNAL}], DiskSignals.START
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and FL, 0b1111111111111110 ## Disable interrupts
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mov FL, ACC
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_disk_load_from_ddd_blocking_wait_loop:
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mov ACC, [{DISK_INTERFACE_ADDR + DiskRegisters.RO_STATUS}]
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jne $_disk_load_from_ddd_blocking_wait_loop, DiskStatus.FREE
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or FL, 0b0000000000000001 ## Enable interrupts
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mov FL, ACC
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ret |