waterDataDiscreteRateMining averageLiquidLevel.h 姚强 commit at 2020-11-26

waterDataDiscreteRateMining/averageCalculation/averageLiquidLevel.h

@@ -182,3 +182,95 @@
  * of the alternate video page for page-flipping animation. Since there
  * is no ROM call to flip pages, it is necessary to go play with the
  * right bit in the VIA chip (6522 Versatile Interface Adapter).
+ * [CSA: don't know which one this is, but it's one of 'em!]
+ */
+
+/*
+ *	6522 registers - see databook.
+ * CSA: Assignments for VIA1 confirmed from CHRP spec.
+ */
+
+/* partial address decode.  0xYYXX : XX part for RBV, YY part for VIA */
+/* Note: 15 VIA regs, 8 RBV regs */
+
+#define vBufB	0x0000	/* [VIA/RBV]  Register B */
+#define vBufAH	0x0200  /* [VIA only] Buffer A, with handshake. DON'T USE! */
+#define vDirB	0x0400  /* [VIA only] Data Direction Register B. */
+#define vDirA	0x0600  /* [VIA only] Data Direction Register A. */
+#define vT1CL	0x0800  /* [VIA only] Timer one counter low. */
+#define vT1CH	0x0a00  /* [VIA only] Timer one counter high. */
+#define vT1LL	0x0c00  /* [VIA only] Timer one latches low. */
+#define vT1LH	0x0e00  /* [VIA only] Timer one latches high. */
+#define vT2CL	0x1000  /* [VIA only] Timer two counter low. */
+#define vT2CH	0x1200  /* [VIA only] Timer two counter high. */
+#define vSR	0x1400  /* [VIA only] Shift register. */
+#define vACR	0x1600  /* [VIA only] Auxiliary control register. */
+#define vPCR	0x1800  /* [VIA only] Peripheral control register. */
+                        /*            CHRP sez never ever to *write* this.
+			 *            Mac family says never to *change* this.
+			 * In fact we need to initialize it once at start. */
+#define vIFR	0x1a00  /* [VIA/RBV]  Interrupt flag register. */
+#define vIER	0x1c00  /* [VIA/RBV]  Interrupt enable register. */
+#define vBufA	0x1e00  /* [VIA/RBV] register A (no handshake) */
+
+/* The RBV only decodes the bottom eight address lines; the VIA doesn't
+ * decode the bottom eight -- so vBufB | rBufB will always get you BufB */
+/* CSA: in fact, only bits 0,1, and 4 seem to be decoded.
+ * BUT note the values for rIER and rIFR, where the top 8 bits *do* seem
+ * to matter.  In fact *all* of the top 8 bits seem to matter;
+ * setting rIER=0x1813 and rIFR=0x1803 doesn't work, either.
+ * Perhaps some sort of 'compatibility mode' is built-in? [21-May-1999]
+ */
+
+#define rBufB   0x0000  /* [VIA/RBV]  Register B */
+#define rExp	0x0001	/* [RBV only] RBV future expansion (always 0) */
+#define rSIFR	0x0002  /* [RBV only] RBV slot interrupts register. */
+#define rIFR	0x1a03  /* [VIA/RBV]  RBV interrupt flag register. */
+#define rMonP   0x0010  /* [RBV only] RBV video monitor type. */
+#define rChpT   0x0011  /* [RBV only] RBV test mode register (reads as 0). */
+#define rSIER   0x0012  /* [RBV only] RBV slot interrupt enables. */
+#define rIER    0x1c13  /* [VIA/RBV]  RBV interrupt flag enable register. */
+#define rBufA	rSIFR   /* the 'slot interrupts register' is BufA on a VIA */
+
+/*
+ * Video monitor parameters, for rMonP:
+ */
+#define RBV_DEPTH  0x07	/* bits per pixel: 000=1,001=2,010=4,011=8 */
+#define RBV_MONID  0x38	/* monitor type, as below. */
+#define RBV_VIDOFF 0x40	/* 1 turns off onboard video */
+/* Supported monitor types: */
+#define MON_15BW   (1<<3) /* 15" BW portrait. */
+#define MON_IIGS   (2<<3) /* 12" color (modified IIGS monitor). */
+#define MON_15RGB  (5<<3) /* 15" RGB portrait. */
+#define MON_12OR13 (6<<3) /* 12" BW or 13" RGB. */
+#define MON_NONE   (7<<3) /* No monitor attached. */
+
+/* To clarify IER manipulations */
+#define IER_SET_BIT(b) (0x80 | (1<<(b)) )
+#define IER_CLR_BIT(b) (0x7F & (1<<(b)) )
+
+#ifndef __ASSEMBLY__
+
+extern volatile __u8 *via1,*via2;
+extern int rbv_present,via_alt_mapping;
+
+extern void via_register_interrupts(void);
+extern void via_irq_enable(int);
+extern void via_irq_disable(int);
+extern void via_nubus_irq_startup(int irq);
+extern void via_nubus_irq_shutdown(int irq);
+extern void via1_irq(unsigned int irq, struct irq_desc *desc);
+extern void via1_set_head(int);
+extern int via2_scsi_drq_pending(void);
+
+static inline int rbv_set_video_bpp(int bpp)
+{
+	char val = (bpp==1)?0:(bpp==2)?1:(bpp==4)?2:(bpp==8)?3:-1;
+	if (!rbv_present || val<0) return -1;
+	via2[rMonP] = (via2[rMonP] & ~RBV_DEPTH) | val;
+	return 0;
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_MAC_VIA_H_ */