1992/0807/ss/io.h (diff list | history)

1991/1225/sys/src/9/ss/io.h:4,9 – 1992/0807/sys/src/9/ss/io.h:4,12 (short | long | prev | next)
Created. rsc Fri Mar 4 12:44:25 2005
1990/1227		#define CLOCKFREQ 1000000 /* one microsecond increments */
1991/1225		#define KMDUART 0xF0000000 /* keyboard A, mouse B */ #define EIADUART 0xF1000000 /* serial ports */
1992/0807		#define NVRAM 0xF2000000 /* non-volatile RAM */ #define DMA 0xF8400000 /* DMA registers */ #define SCSI 0xF8800000 /* NCR53C90 registers */
1990/1231		#define ETHER 0xF8C00000 /* RDP, RAP */ #define EEPROM 0xF2000000
1991/0110		#define INTRREG 0xF5000000 /* interrupt register, IO space */
1991/1225/sys/src/9/ss/io.h:23,25 – 1992/0807/sys/src/9/ss/io.h:26,131
1991/0604
1991/1225		#define KMFREQ 10000000 /* crystal frequency for kbd/mouse 8530 */ #define EIAFREQ 5000000 /* crystal frequency for serial port 8530 */
1992/0807		/* * non-volatile ram */ #define NVREAD (2048-8) /* minus RTC */ #define NVWRITE (2048-8-32) /* minus RTC, minus ID prom */ /* * real-time clock (every 4th location) */ typedef struct RTCdev RTCdev; struct RTCdev { uchar control; /* read or write the device */ uchar sec; uchar min; uchar hour; uchar wday; uchar mday; uchar mon; uchar year; }; #define RTCOFF 0x7F8 #define RTCREAD (0x40) #define RTCWRITE (0x80) /* * dma */ typedef struct DMAdev DMAdev; struct DMAdev { ulong csr; /* Control/Status */ ulong addr; /* address in 16Mb segment */ ulong count; /* transfer byte count */ ulong diag; }; enum { Int_pend = 0x00000001, /* interrupt pending */ Err_pend = 0x00000002, /* error pending */ Pack_cnt = 0x0000000C, /* pack count (mask) */ Int_en = 0x00000010, /* interrupt enable */ Dma_Flush = 0x00000020, /* flush pack end error */ Drain = 0x00000040, /* drain pack to memory */ Dma_Reset = 0x00000080, /* hardware reset (sticky) */ Write = 0x00000100, /* set for device to memory (!) */ En_dma = 0x00000200, /* enable DMA */ Req_pend = 0x00000400, /* request pending */ Byte_addr = 0x00001800, /* next byte addr (mask) */ En_cnt = 0x00002000, /* enable count */ Tc = 0x00004000, /* terminal count */ Ilacc = 0x00008000, /* which ether chip */ Dev_id = 0xF0000000, /* device ID */ }; /* * NCR53C90 SCSI controller (every 4th location) */ typedef struct SCSIdev SCSIdev; struct SCSIdev { uchar countlo; /* byte count, low bits */ uchar pad1[3]; uchar counthi; /* byte count, hi bits */ uchar pad2[3]; uchar fifo; /* data fifo */ uchar pad3[3]; uchar cmd; /* command byte */ uchar pad4[3]; union { struct { /* read only... */ uchar status; /* status */ uchar pad05[3]; uchar intr; /* interrupt status */ uchar pad06[3]; uchar step; /* sequence step */ uchar pad07[3]; uchar fflags; /* fifo flags */ uchar pad08[3]; uchar config; /* configuration */ uchar pad09[3]; uchar Reserved1; uchar pad0A[3]; uchar Reserved2; uchar pad0B[3]; }; struct { /* write only... */ uchar destid; /* destination id */ uchar pad15[3]; uchar timeout; /* during selection */ uchar pad16[3]; uchar syncperiod; /* synchronous xfr period */ uchar pad17[3]; uchar syncoffset; /* synchronous xfr offset */ uchar pad18[3]; uchar XXX; uchar pad19[3]; uchar clkconf; uchar pad1A[3]; uchar test; uchar pad1B[3]; }; }; };