5700420417
The swim chip provides an implementation of both Apple's IWM and ISM floppy disk controllers. Split the existing implementation into separate register banks for each controller, whilst also switching the IWM registers from 16-bit to 8-bit as implemented in real hardware. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20231004083806.757242-13-mark.cave-ayland@ilande.co.uk> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
/*
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* QEMU Macintosh floppy disk controller emulator (SWIM)
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*
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* Copyright (c) 2014-2018 Laurent Vivier <laurent@vivier.eu>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef SWIM_H
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#define SWIM_H
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#include "hw/block/block.h"
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#include "hw/sysbus.h"
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#include "qom/object.h"
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#define SWIM_MAX_FD 2
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typedef struct SWIMCtrl SWIMCtrl;
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#define TYPE_SWIM_DRIVE "swim-drive"
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OBJECT_DECLARE_SIMPLE_TYPE(SWIMDrive, SWIM_DRIVE)
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struct SWIMDrive {
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DeviceState qdev;
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int32_t unit;
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BlockConf conf;
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};
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#define TYPE_SWIM_BUS "swim-bus"
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OBJECT_DECLARE_SIMPLE_TYPE(SWIMBus, SWIM_BUS)
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struct SWIMBus {
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BusState bus;
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struct SWIMCtrl *ctrl;
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};
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typedef struct FDrive {
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SWIMCtrl *swimctrl;
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BlockBackend *blk;
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BlockConf *conf;
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} FDrive;
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struct SWIMCtrl {
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MemoryRegion swim;
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MemoryRegion iwm;
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MemoryRegion ism;
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FDrive drives[SWIM_MAX_FD];
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int mode;
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/* IWM mode */
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int iwm_switch;
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uint8_t iwmregs[16];
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uint8_t iwm_data;
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uint8_t iwm_mode;
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/* SWIM mode */
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uint8_t ismregs[16];
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uint8_t swim_phase;
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uint8_t swim_mode;
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SWIMBus bus;
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};
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#define TYPE_SWIM "swim"
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OBJECT_DECLARE_SIMPLE_TYPE(Swim, SWIM)
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struct Swim {
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SysBusDevice parent_obj;
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SWIMCtrl ctrl;
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};
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#endif
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