4c8f4ab41c
According to the "Guide To The Macintosh Family Hardware", the 60Hz VIA1 timer on newer Macs such as the Quadra only exists for compatibility with old software and is no longer synced to the VBL interval. Rename the VBL timer to 60Hz timer to emphasise this and to prevent confusion when the real VBL interrupt (now handled as a NuBus slot interrupt) is added in future. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu> Message-Id: <20210311100505.22596-6-mark.cave-ayland@ilande.co.uk> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
/*
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*
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* Copyright (c) 2011-2018 Laurent Vivier
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_MISC_MAC_VIA_H
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#define HW_MISC_MAC_VIA_H
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#include "exec/memory.h"
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#include "hw/sysbus.h"
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#include "hw/misc/mos6522.h"
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#include "qom/object.h"
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/* VIA 1 */
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#define VIA1_IRQ_ONE_SECOND_BIT 0
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#define VIA1_IRQ_60HZ_BIT 1
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#define VIA1_IRQ_ADB_READY_BIT 2
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#define VIA1_IRQ_ADB_DATA_BIT 3
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#define VIA1_IRQ_ADB_CLOCK_BIT 4
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#define VIA1_IRQ_NB 8
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#define VIA1_IRQ_ONE_SECOND (1 << VIA1_IRQ_ONE_SECOND_BIT)
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#define VIA1_IRQ_60HZ (1 << VIA1_IRQ_60HZ_BIT)
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#define VIA1_IRQ_ADB_READY (1 << VIA1_IRQ_ADB_READY_BIT)
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#define VIA1_IRQ_ADB_DATA (1 << VIA1_IRQ_ADB_DATA_BIT)
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#define VIA1_IRQ_ADB_CLOCK (1 << VIA1_IRQ_ADB_CLOCK_BIT)
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#define TYPE_MOS6522_Q800_VIA1 "mos6522-q800-via1"
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OBJECT_DECLARE_SIMPLE_TYPE(MOS6522Q800VIA1State, MOS6522_Q800_VIA1)
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struct MOS6522Q800VIA1State {
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/*< private >*/
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MOS6522State parent_obj;
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qemu_irq irqs[VIA1_IRQ_NB];
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uint8_t last_b;
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uint8_t PRAM[256];
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/* external timers */
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QEMUTimer *one_second_timer;
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int64_t next_second;
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QEMUTimer *sixty_hz_timer;
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int64_t next_sixty_hz;
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};
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/* VIA 2 */
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#define VIA2_IRQ_SCSI_DATA_BIT 0
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#define VIA2_IRQ_SLOT_BIT 1
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#define VIA2_IRQ_UNUSED_BIT 2
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#define VIA2_IRQ_SCSI_BIT 3
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#define VIA2_IRQ_ASC_BIT 4
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#define VIA2_IRQ_NB 8
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#define VIA2_IRQ_SCSI_DATA (1 << VIA2_IRQ_SCSI_DATA_BIT)
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#define VIA2_IRQ_SLOT (1 << VIA2_IRQ_SLOT_BIT)
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#define VIA2_IRQ_UNUSED (1 << VIA2_IRQ_SCSI_BIT)
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#define VIA2_IRQ_SCSI (1 << VIA2_IRQ_UNUSED_BIT)
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#define VIA2_IRQ_ASC (1 << VIA2_IRQ_ASC_BIT)
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#define TYPE_MOS6522_Q800_VIA2 "mos6522-q800-via2"
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OBJECT_DECLARE_SIMPLE_TYPE(MOS6522Q800VIA2State, MOS6522_Q800_VIA2)
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struct MOS6522Q800VIA2State {
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/*< private >*/
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MOS6522State parent_obj;
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};
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#define TYPE_MAC_VIA "mac_via"
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OBJECT_DECLARE_SIMPLE_TYPE(MacVIAState, MAC_VIA)
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struct MacVIAState {
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SysBusDevice busdev;
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VMChangeStateEntry *vmstate;
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/* MMIO */
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MemoryRegion mmio;
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MemoryRegion via1mem;
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MemoryRegion via2mem;
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/* VIAs */
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MOS6522Q800VIA1State mos6522_via1;
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MOS6522Q800VIA2State mos6522_via2;
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/* RTC */
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uint32_t tick_offset;
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uint8_t data_out;
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int data_out_cnt;
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uint8_t data_in;
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uint8_t data_in_cnt;
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uint8_t cmd;
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int wprotect;
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int alt;
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BlockBackend *blk;
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/* ADB */
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ADBBusState adb_bus;
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qemu_irq adb_data_ready;
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int adb_data_in_size;
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int adb_data_in_index;
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int adb_data_out_index;
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uint8_t adb_data_in[128];
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uint8_t adb_data_out[16];
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uint8_t adb_autopoll_cmd;
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};
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#endif
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