blob: be08236d4bbd7e76bcacc6507c75ecbab5bc1433 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/***************************************************************************
Zilog Z80 DMA Direct Memory Access Controller emulation
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
****************************************************************************
_____ _____
A5 1 |* \_/ | 40 A6
A4 2 | | 39 A7
A3 3 | | 38 IEI
A2 4 | | 37 _INT/_PULSE
A1 5 | | 36 IEO
A0 6 | | 35 D0
CLK 7 | | 34 D1
_WR 8 | | 33 D2
_RD 9 | | 32 D3
_IORQ 10 | Z8410 | 31 D4
+5V 11 | | 30 GND
_MREQ 12 | | 29 D5
_BAO 13 | | 28 D6
_BAI 14 | | 27 D7
_BUSREQ 15 | | 26 _M1
_CE/_WAIT 16 | | 25 RDY
A15 17 | | 24 A8
A14 18 | | 23 A9
A13 19 | | 22 A10
A12 20 |_____________| 21 A11
***************************************************************************/
#ifndef __Z80DMA__
#define __Z80DMA__
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
#define Z80DMA DEVICE_GET_INFO_NAME(z80dma)
#define MDRV_Z80DMA_ADD(_tag, _clock, _config) \
MDRV_DEVICE_ADD(_tag, Z80DMA, _clock) \
MDRV_DEVICE_CONFIG(_config)
#define Z80DMA_INTERFACE(_name) \
const z80dma_interface (_name) =
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
typedef struct _z80dma_interface z80dma_interface;
struct _z80dma_interface
{
devcb_write_line out_busreq_func;
devcb_write_line out_int_func;
devcb_write_line out_bao_func;
/* memory accessors */
devcb_read8 in_mreq_func;
devcb_write8 out_mreq_func;
/* I/O accessors */
devcb_read8 in_iorq_func;
devcb_write8 out_iorq_func;
};
/***************************************************************************
PROTOTYPES
***************************************************************************/
DEVICE_GET_INFO( z80dma );
/* register access */
READ8_DEVICE_HANDLER( z80dma_r );
WRITE8_DEVICE_HANDLER( z80dma_w );
/* ready */
WRITE_LINE_DEVICE_HANDLER( z80dma_rdy_w );
/* wait */
WRITE_LINE_DEVICE_HANDLER( z80dma_wait_w );
/* bus acknowledge in */
WRITE_LINE_DEVICE_HANDLER( z80dma_bai_w );
#endif
|