diff --git a/sys/pic32/rd_sramc_BB.c b/sys/pic32/rd_sramc_BB.c
deleted file mode 100644
index 5886672..0000000
--- a/sys/pic32/rd_sramc_BB.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Driver for external RAM-based swap device.
- *
- * Interface:
- *  data[7:0] - connected to PORTx
- *  rd        - fetch a byte from memory to data[7:0], increment address
- *  wr        - write a byte data[7:0] to memory, increment address
- *  ldaddr    - write address from data[7:0] in 3 steps: low-middle-high
- *
- * Signals rd, wr, ldadr are active LOW and idle HIGH.
- * To activate, you need to pulse it high-low-high.
- * CHANGE: IM 23.12.2011 - signals active LOW
- * CHANGE: IM 24.12.2011 - finetuning for 55ns SRAM and 7ns CPLD
- *                       - some nops removed
- *                       - nops marked 55ns are required !!!
- *                       - MAX performance settings for 55ns SRAM
- * CHANGE: IM 28.12.2011 - dev_load_address is 6x4bit now
- */
-#include "param.h"
-#include "systm.h"
-#include "buf.h"
-#include "errno.h"
-#include "dk.h"
-#include "rdisk.h"
-
-#include "debug.h"
-
-int sw_dkn = -1;                /* Statistics slot number */
-
-/*
- * Set data output value.
- */
-static inline void data_set (unsigned char byte)
-{
-        LAT_CLR(SW_DATA_PORT) = 0xff << SW_DATA_PIN;
-        LAT_SET(SW_DATA_PORT) = byte << SW_DATA_PIN;
-}
-
-/*
- * Switch data bus to input.
- */
-static inline void data_switch_input ()
-{
-        LAT_CLR(SW_DATA_PORT) = 0xff << SW_DATA_PIN;    // !!! PIC32 errata
-        TRIS_SET(SW_DATA_PORT) = 0xff << SW_DATA_PIN;
-	asm volatile ("nop");
-}
-
-/*
- * Switch data bus to output.
- */
-static inline void data_switch_output ()
-{
-        TRIS_CLR(SW_DATA_PORT) = 0xff << SW_DATA_PIN;
-	asm volatile ("nop");
-}
-
-/*
- * Get data input value.
- */
-static inline unsigned char data_get ()
-{
-	return PORT_VAL(SW_DATA_PORT) >> SW_DATA_PIN;
-}
-
-/*
- * Send LDA pulse: high-low-high.
- */
-static inline void lda_pulse ()
-{
-	LAT_CLR(SW_LDA_PORT) = 1 << SW_LDA_PIN;
-	asm volatile ("nop");
-	asm volatile ("nop");
-	LAT_SET(SW_LDA_PORT) = 1 << SW_LDA_PIN;
-}
-
-/*
- * Set RD low.
- * Minimal time between falling edge of RD to data valid is 50ns.
- */
-static inline void rd_low ()
-{
-        LAT_CLR(SW_RD_PORT) = 1 << SW_RD_PIN;
-
-#if BUS_KHZ > 33000
-        asm volatile ("nop"); // 55ns
- 	asm volatile ("nop"); // 55ns
-#endif
-#if BUS_KHZ > 66000
-        asm volatile ("nop"); // 55ns
-	asm volatile ("nop"); // 55ns
-#endif
-}
-
-/*
- * Set RD high.
- */
-static inline void rd_high ()
-{
-        LAT_SET(SW_RD_PORT) = 1 << SW_RD_PIN;
-}
-
-/*
- * Send WR pulse: high-low-high.
- * It shall be minimally 40ns.
- */
-static inline void wr_pulse ()
-{
-        LAT_CLR(SW_WR_PORT) = 1 << SW_WR_PIN;
-
-#if BUS_KHZ > 33000
-        asm volatile ("nop");  // 55ns
-	asm volatile ("nop");  // 55ns
-#endif
-#if BUS_KHZ > 66000
-        asm volatile ("nop");  // 55ns
-#endif
-        LAT_SET(SW_WR_PORT) = 1 << SW_WR_PIN;
-}
-
-/*
- * Load the 24 bit address to ramdisk.
- * Leave data bus in input mode.
- */
-static void
-dev_load_address (addr)
-        unsigned addr;
-{
-	/* Toggle rd: make one dummy read - this clears cpld's addr pointer */
-        rd_low ();
-	rd_high ();
-
-	data_switch_output();           /* switch data bus to output */
-
-        data_set (addr);                /* send lowest 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-        data_set (addr >> 4);           /* send 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-        data_set (addr >> 8);           /* send 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-	data_set (addr >> 12);          /* send 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-        data_set (addr >> 16);          /* send 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-        data_set (addr >> 20);          /* send highest 4 bits */
-        lda_pulse();                    /* pulse ldaddr */
-
-	data_switch_input();
-}
-
-/*
- * Get number of kBytes on the disk.
- * Return nonzero if successful.
- */
-int sramc_size ( int unit )
-{
-	return 4096;
-}
-
-/*
- * Read a block of data.
- */
-int sramc_read (int unit, unsigned int blockno, char *data, unsigned int nbytes)
-{
-	int i;
-
-	//DEBUG9("sramc%d: read block %u, length %u bytes, addr %p\n",
-	//	major(dev), blockno, nbytes, data);
-
-	dev_load_address (blockno * DEV_BSIZE);
-
-        data_switch_input();            /* switch data bus to input */
-
-	/* Read data. */
-        for (i=0; i<nbytes; i++) {
-                rd_low();               /* set rd LOW */
-
-                *data++ = data_get();   /* read a byte of data */
-
-                rd_high();              /* set rd HIGH */
-        }
-	return 1;
-}
-
-/*
- * Write a block of data.
- */
-int sramc_write (int unit, unsigned int blockno, char *data, unsigned int nbytes)
-{
-	unsigned i;
-
-	//DEBUG9("sramc%d: write block %u, length %u bytes, addr %p\n",
-	//	major(dev), blockno, nbytes, data);
-
-	dev_load_address (blockno * DEV_BSIZE);
-
-	data_switch_output();           /* switch data bus to output */
-
-        for (i=0; i<nbytes; i++) {
-                data_set (*data);       /* send a byte of data */
-                data++;
-
-                wr_pulse();             /* pulse wr */
-        }
-
-        /* Switch data bus to input. */
-        data_switch_input();
-	return 1;
-}
-
-
-/*
- * Init the disk.
- */
-void sramc_init (int unit)
-{
-	struct buf *bp;
-	if (TRIS_VAL(SW_LDA_PORT) & (1 << SW_LDA_PIN)) {
-		/* Initialize hardware.
-                 * Switch data bus to input. */
-                data_switch_input();
-
-                /* Set idle HIGH rd, wr and ldaddr as output pins. */
-		LAT_SET(SW_RD_PORT) = 1 << SW_RD_PIN;
-		LAT_SET(SW_WR_PORT) = 1 << SW_WR_PIN;
-		LAT_SET(SW_LDA_PORT) = 1 << SW_LDA_PIN;
-		TRIS_CLR(SW_RD_PORT) = 1 << SW_RD_PIN;
-		TRIS_CLR(SW_WR_PORT) = 1 << SW_WR_PIN;
-		TRIS_CLR(SW_LDA_PORT) = 1 << SW_LDA_PIN;
-
-                /* Toggle rd: make one dummy read. */
-                rd_low();              /* set rd low */
-                rd_high();             /* set rd high */
-        }
-	DEBUG3("sramc%d: init done\n",unit);
-        bp = prepartition_device("sramc0");
-        if(bp)
-        {
-                sramc_write(0, 0, bp->b_addr, 512);
-                brelse(bp);
-        }
-
-	return;
-}
-
-/*
- * Open the disk.
- */
-int sramc_open (int unit)
-{
-	DEBUG3("sramc%d: open\n",unit);
-	return 0;
-}