63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Implementation of the NCR 53c400 series of SCSI Host Adapters
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* made by NCR. These controllers were designed for the ISA and MCA bus.
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*
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* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
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* TheCollector1995, <mariogplayer@gmail.com>
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* Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2017-2018 Sarah Walker.
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* Copyright 2017-2018 Fred N. van Kempen.
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* Copyright 2017-2024 TheCollector1995.
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*/
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#ifndef SCSI_NCR53C400_H
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#define SCSI_NCR53C400_H
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typedef struct ncr53c400_t {
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rom_t bios_rom;
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mem_mapping_t mapping;
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ncr_t ncr;
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uint8_t buffer[512];
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uint8_t int_ram[0x40];
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uint8_t ext_ram[0x600];
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uint32_t rom_addr;
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uint16_t base;
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int8_t type;
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uint8_t block_count;
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uint8_t status_ctrl;
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int simple_ctrl;
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int block_count_loaded;
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int buffer_pos;
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int buffer_host_pos;
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int busy;
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uint8_t pos_regs[8];
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pc_timer_t timer;
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} ncr53c400_t;
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#define CTRL_DATA_DIR 0x40
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#define STATUS_BUFFER_NOT_READY 0x04
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#define STATUS_5380_ACCESSIBLE 0x80
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extern void ncr53c400_simple_write(uint8_t val, void *priv);
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extern void ncr53c400_write(uint32_t addr, uint8_t val, void *priv);
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extern uint8_t ncr53c400_simple_read(void *priv);
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extern uint8_t ncr53c400_read(uint32_t addr, void *priv);
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extern void ncr53c400_callback(void *priv);
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#endif /*SCSI_NCR53C400_H*/
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