42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
/***** dma.h *********************************************************
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* (c) 2010 CTA Systems Inc. All rights reserved. Glory To God *
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* *
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* Direct Memory Access (DMA) Routines *
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* =================================== *
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* *
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************************************************************ cta os */
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#ifndef __DMA__H__
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#define __DMA__H__
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enum DMA_MODE_REG_MASK {
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DMA_MODE_MASK_SEL = 3,
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DMA_MODE_MASK_TRA = 0xc,
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DMA_MODE_SELF_TEST = 0,
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DMA_MODE_READ_TRANSFER = 4,
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DMA_MODE_WRITE_TRANSFER = 8,
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DMA_MODE_MASK_AUTO = 0x10,
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DMA_MODE_MASK_IDEC = 0x20,
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DMA_MODE_MASK = 0xc0,
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DMA_MODE_TRANSFER_ON_DEMAND = 0,
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DMA_MODE_TRANSFER_SINGLE = 0x40,
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DMA_MODE_TRANSFER_BLOCK = 0x80,
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DMA_MODE_TRANSFER_CASCADE = 0xC0
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};
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extern void i86_dma_set_address(unsigned short channel, unsigned char low, unsigned char high);
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extern void i86_dma_set_count (unsigned short channel, unsigned char low, unsigned char high);
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extern void i86_dma_set_external_page_registers (unsigned char channel, unsigned char val);
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extern void i86_dma_mask_channel (unsigned char channel);
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extern void i86_dma_unmask_channel (unsigned char channel);
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extern void i86_dma_unmask_all();
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extern void i86_dma_reset_flipflop (unsigned char dma);
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extern void i86_dma_reset ();
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extern void i86_dma_set_mode(unsigned char channel, unsigned char mode);
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extern void i86_dma_set_read (unsigned char channel);
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extern void i86_dma_set_write (unsigned char channel);
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#endif |