configs/makerlisp: Update README, comments. Removed unused definitions. Enable task names and the NSH date command.

configs/makerlisp/README.txt

@@ -278,22 +278,46 @@ Configuration Subdirectories
        connectivity is via host serical console connected through the USB
        serial console.
 
-       Withe the I/O expansion board, the serial console can also be sued with
+       With the I/O expansion board, the serial console can also be used with
        either a TTL-to-RS232 or a TTL-to-USB Serial adapter connected by CN1
        pins 59 and 61.
 
        The default baud setting is 115200N1.
 
-       To use the VGA display controller with stdout and stderr, you also
+       To use the VGA display controller with stdin, stdout and stderr, you
-       need to selection CONFIG_MAKERLISP_VGA=y in your configuration.  This
+       also need to selection CONFIG_MAKERLISP_VGA=y in your configuration.
-       enables a required VGA initialization sequence.
+       This enables a required VGA initialization sequence.
 
        The PC terminal software should be configured as described in the
        MakerLisp Putty HOWTO document:  115200N1 BAUD.
 
+    2. The eZ80 RTC, the procFS file system, and SD card support in included.
+       The procFS file system will be auto-mounted at /proc when the board
+       boots.
+
+       The RTC can be read and set from the NSH date command.
+
+         nsh> date
+         Thu, Dec 19 20:53:29 2086
+         nsh> help date
+         date usage:  date [-s "MMM DD HH:MM:SS YYYY"]
+         nsh> date -s "Jun 16 15:09:00 2019"
+         nsh> date
+         Sun, Jun 16 15:09:01 2019
+
+       The SD card can be be mounted with the following NSH mount command:
+
+         nsh> mount -t vfat /dev/mmcsd0 /mnt/sdcard
+
+       NOTE:  The is no card detect signal so the microSD card must be
+       placed in the card slot before the system is started.
+
     STATUS:
       2109-06-16:  The basic NSH configuration appears to be fully functional
         using only the CPU and I/O expansion card.  Console is provided over
         USB.
 
-        Added support for SPI-based SD cards, the RTC and procFS.
+        Added support for SPI-based SD cards, the RTC and procFS.  There are
+        still a few issues at the end-of-the-day:  (1) the SD card block driver
+        is not being registered, and (2) RTC does not preserve time across a
+        power cycle.

configs/makerlisp/nsh/defconfig

@@ -32,7 +32,6 @@ CONFIG_MMCSD_MULTIBLOCK_DISABLE=y
 CONFIG_NFILE_DESCRIPTORS=8
 CONFIG_NFILE_STREAMS=8
 CONFIG_NSH_ARCHINIT=y
-CONFIG_NSH_DISABLE_DATE=y
 CONFIG_NSH_DISABLE_IFUPDOWN=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_LINELEN=64
@@ -50,7 +49,6 @@ CONFIG_START_DAY=16
 CONFIG_START_MONTH=6
 CONFIG_START_YEAR=2019
 CONFIG_SYSTEM_NSH=y
-CONFIG_TASK_NAME_SIZE=0
 CONFIG_UART0_BITS=0
 CONFIG_UART0_RXBUFSIZE=192
 CONFIG_UART0_SERIAL_CONSOLE=y

configs/makerlisp/src/makerlisp.h

@@ -62,14 +62,13 @@
 
 /* Memory map.  Board-specific extensions to the basic ez80f91 memory map
  * (see arch/z80/src/ez80/ez80f91.h)
+ *
+ * - Chip select 0 is for RAM 0 to (512k - 1), starting at address 0x40000
+ *   (after the flash).
+ * - Chip select 1 is for 512k to (1M - 1), at address 0xc0000.
+ *
+ * All RAM has zero wait states.
  */
-                                   /* CS0: 0x000000 256Kb of on-chip flash */
-#define EZ80_OFFCHIPFLASH 0x400000 /* CS0: Off chip flash (Up to 4Mb-256Kb) */
-#define EZ80_LEDGPIOCNTRL 0x800000 /* CS2: (See below) */
-#define EZ80_PLTFMSRAM    0xb80000 /* CS2: Platform SRAM (512Kb) */
-#define EZ80_MODULESRAM   0xc00000 /* CS1: Module SRAM (up to 2Mb) */
-                                   /* 0xffc000 On-chip EMAC SRAM (8Kb) */
-                                   /* 0xffe000 On-chip SRAM (8Kb) */
 
 /* LED and port emulation memory register addresses */
 
@@ -84,32 +83,6 @@
 #define EZ80_GPIOD6       (1 << 6)
 #define EZ80_GPIOD7       (1 << 7)
 
-/* Modem Signals:
- *
- * DCD:
- *   The Data Carrier Detect (DCD) signal at D1 indicates that a good carrier
- *   signal is being received from the remove mode.
- * RX:
- *   The RX signal at D2 indicates that data is received from the modem.
- * DTR:
- *   The Data Terminal Ready (DTR) signal at D3 informs the modem that the PC
- *   is ready.
- * TX:
- *   The TX signal at D4 indicates that data is transmitted to the modem.
- */
-
- /* Push buttons:
-  *
-  * PB0   SW1 Bit 0 of GPIO Port B
-  * PB1   SW2 Bit 1 of GPIO Port B
-  * PB2   SW3 Bit 2 of GPIO Port B
-  * RESET SW4
-  */
-
-#define EZ80_PB0_IRQ EZ80_PORTB0_IRQ  /* Vector Oxa0 */
-#define EZ80_PB1_IRQ EZ80_PORTB1_IRQ  /* Vector Oxa4 */
-#define EZ80_PB2_IRQ EZ80_PORTB2_IRQ  /* Vector Oxa8 */
-
 /****************************************************************************
  * Public Data
  ****************************************************************************/