Initial commitHEADmaster

4 files changed, 443 insertions, 0 deletions

diff --git a/stn/Makefile b/stn/Makefile
new file mode 100644
index 0000000..861b459
--- /dev/null
+++ b/stn/Makefile
@@ -0,0 +1,40 @@
+ASM=crt0.asm
+SRC=stn.c
+
+OBJ=$(ASM:%.asm=build/%.rel) $(SRC:%.c=build/%.rel)
+IHX=build/stn.ihx
+TARGET=stn.hex
+
+CFLAGS=-mz80 -I../dev/include -I. --Werror
+LDFLAGS=-mz80 --no-std-crt0 --code-loc 0x4100 --data-loc 0xC000 -Wl-b_GSINIT=0x4080
+
+all : $(TARGET)
+
+build/%.rel : %.asm
+	@echo '  (AS)' $<
+	@sdcpp -P -I. -I../dev/include -DASSEMBLY $< > build/$<
+	@sdasz80 -g -o $@ build/$<
+
+build/%.rel : %.c
+	@echo '  (CC)' $<
+	@sdcc $(CFLAGS) -c -o $@ $<
+
+$(IHX) : $(OBJ)
+	@echo '  (LD)' $(OBJ)
+	@sdcc $(LDFLAGS) -o $@ $(OBJ)
+
+$(TARGET) : $(IHX)
+	@hex2bin.py $< $@
+
+.PHONY : upload
+upload :
+
+
+.PHONE : flash
+flash :
+	@zup -a 5 -P -b38400 -p /dev/ttyUSB0 "w:0:4000:$(TARGET)"
+#	zup -a 5 -P -p /dev/ttyUSB0 "w:0:4000:$(TARGET)"
+
+.PHONY : clean
+clean :
+	@rm -rf build/* $(TARGET)
diff --git a/stn/crt0.asm b/stn/crt0.asm
new file mode 100644
index 0000000..2fdef59
--- /dev/null
+++ b/stn/crt0.asm
@@ -0,0 +1,66 @@
+#include <zeta.h>
+
+	.module crt0
+	.globl	_main
+
+	.area	_HEADER (ABS)
+	;; Reset vector
+	.org 	0x4000
+    ld      SP, #0x00
+    jp      init
+    ;; ISR table
+
+    ;; Init code
+init:
+    call	gsinit
+	call	_main
+1$:
+	halt
+	jr	1$
+
+	;; Ordering of segments for the linker.
+	.area	_HOME
+	.area	_CODE
+	.area	_INITIALIZER
+	.area   _GSINIT
+	.area   _GSFINAL
+
+	.area	_DATA
+	.area	_INITIALIZED
+	.area	_BSEG
+	.area   _BSS
+	.area   _HEAP
+
+	.area   _CODE
+
+	.area   _GSINIT
+gsinit:
+	;; Default-initialized global variables.
+    ld      bc, #l__DATA
+    ld      a, b
+    or      a, c
+    jr      Z, zeroed_data
+    ld      hl, #s__DATA
+    ld      (hl), #0x00
+    dec     bc
+    ld      a, b
+    or      a, c
+    jr      Z, zeroed_data
+    ld      e, l
+    ld      d, h
+    inc     de
+    ldir
+zeroed_data:
+	;; Explicitly initialized global variables.
+	ld	bc, #l__INITIALIZER
+	ld	a, b
+	or	a, c
+	jr	Z, gsinit_next
+	ld	de, #s__INITIALIZED
+	ld	hl, #s__INITIALIZER
+	ldir
+
+gsinit_next:
+
+	.area   _GSFINAL
+	ret
diff --git a/stn/font.c b/stn/font.c
new file mode 100644
index 0000000..2d5c4cf
--- /dev/null
+++ b/stn/font.c
@@ -0,0 +1,101 @@
+#include <stdint.h>
+
+const uint8_t font[97][8] =  {
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // ' '
+    {0x00, 0x00, 0x00, 0x4F, 0x4F, 0x00, 0x00, 0x00}, // !
+    {0x00, 0x07, 0x07, 0x00, 0x00, 0x07, 0x07, 0x00}, // "
+    {0x14, 0x7F, 0x7F, 0x14, 0x14, 0x7F, 0x7F, 0x14}, // #
+    {0x00, 0x24, 0x2E, 0x6B, 0x6B, 0x3A, 0x12, 0x00}, // $
+    {0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00}, // %
+    {0x00, 0x32, 0x7F, 0x4D, 0x4D, 0x77, 0x72, 0x50}, // &
+    {0x00, 0x00, 0x00, 0x04, 0x06, 0x03, 0x01, 0x00}, // '
+    {0x00, 0x00, 0x1C, 0x3E, 0x63, 0x41, 0x00, 0x00}, // (
+    {0x00, 0x00, 0x41, 0x63, 0x3E, 0x1C, 0x00, 0x00}, // )
+    {0x08, 0x2A, 0x3E, 0x1C, 0x1C, 0x3E, 0x2A, 0x08}, // *
+    {0x00, 0x08, 0x08, 0x3E, 0x3E, 0x08, 0x08, 0x00}, // +
+    {0x00, 0x00, 0x80, 0xE0, 0x60, 0x00, 0x00, 0x00}, // ,
+    {0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00}, // -
+    {0x00, 0x00, 0x00, 0x60, 0x60, 0x00, 0x00, 0x00}, // .
+    {0x00, 0x40, 0x60, 0x30, 0x18, 0x0C, 0x06, 0x02}, // /
+    {0x00, 0x3E, 0x7F, 0x49, 0x45, 0x7F, 0x3E, 0x00}, // 0
+    {0x00, 0x40, 0x44, 0x7F, 0x7F, 0x40, 0x40, 0x00}, // 1
+    {0x00, 0x62, 0x73, 0x51, 0x49, 0x4F, 0x46, 0x00}, // 2
+    {0x003, 0x22, 0x63, 0x49, 0x49, 0x7F, 0x36, 0x00}, //
+    {0x00, 0x18, 0x18, 0x14, 0x16, 0x7F, 0x7F, 0x10}, // 4
+    {0x00, 0x27, 0x67, 0x45, 0x45, 0x7D, 0x39, 0x00}, // 5
+    {0x00, 0x3E, 0x7F, 0x49, 0x49, 0x7B, 0x32, 0x00}, // 6
+    {0x00, 0x03, 0x03, 0x79, 0x7D, 0x07, 0x03, 0x00}, // 7
+    {0x00, 0x36, 0x7F, 0x49, 0x49, 0x7F, 0x36, 0x00}, // 8
+    {0x00, 0x26, 0x6F, 0x49, 0x49, 0x7F, 0x3E, 0x00}, // 9
+    {0x00, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x00}, // :
+    {0x00, 0x00, 0x80, 0xE4, 0x64, 0x00, 0x00, 0x00}, // //
+    {0x00, 0x08, 0x1C, 0x36, 0x63, 0x41, 0x41, 0x00}, // <
+    {0x00, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x00}, // =
+    {0x00, 0x41, 0x41, 0x63, 0x36, 0x1C, 0x08, 0x00}, // >
+    {0x00, 0x02, 0x03, 0x51, 0x59, 0x0F, 0x06, 0x00}, // ?
+    {0x00, 0x3E, 0x7F, 0x41, 0x4D, 0x4F, 0x2E, 0x00}, // @
+    {0x00, 0x7C, 0x7E, 0x0B, 0x0B, 0x7E, 0x7C, 0x00}, // A
+    {0x00, 0x7F, 0x7F, 0x49, 0x49, 0x7F, 0x36, 0x00}, // B
+    {0x00, 0x3E, 0x7F, 0x41, 0x41, 0x63, 0x22, 0x00}, // C
+    {0x00, 0x7F, 0x7F, 0x41, 0x63, 0x3E, 0x1C, 0x00}, // D
+    {0x00, 0x7F, 0x7F, 0x49, 0x49, 0x41, 0x41, 0x00}, // E
+    {0x00, 0x7F, 0x7F, 0x09, 0x09, 0x01, 0x01, 0x00}, // F
+    {0x00, 0x3E, 0x7F, 0x41, 0x49, 0x7B, 0x3A, 0x00}, // G
+    {0x00, 0x7F, 0x7F, 0x08, 0x08, 0x7F, 0x7F, 0x00}, // H
+    {0x00, 0x00, 0x41, 0x7F, 0x7F, 0x41, 0x00, 0x00}, // I
+    {0x00, 0x20, 0x60, 0x41, 0x7F, 0x3F, 0x01, 0x00}, // J
+    {0x00, 0x7F, 0x7F, 0x1C, 0x36, 0x63, 0x41, 0x00}, // K
+    {0x00, 0x7F, 0x7F, 0x40, 0x40, 0x40, 0x40, 0x00}, // L
+    {0x00, 0x7F, 0x7F, 0x06, 0x0C, 0x06, 0x7F, 0x7F}, // M
+    {0x00, 0x7F, 0x7F, 0x0E, 0x1C, 0x7F, 0x7F, 0x00}, // N
+    {0x00, 0x3E, 0x7F, 0x41, 0x41, 0x7F, 0x3E, 0x00}, // O
+    {0x00, 0x7F, 0x7F, 0x09, 0x09, 0x0F, 0x06, 0x00}, // P
+    {0x00, 0x1E, 0x3F, 0x21, 0x61, 0x7F, 0x5E, 0x00}, // Q
+    {0x00, 0x7F, 0x7F, 0x19, 0x39, 0x6F, 0x46, 0x00}, // R
+    {0x00, 0x26, 0x6F, 0x49, 0x49, 0x7B, 0x32, 0x00}, // S
+    {0x00, 0x01, 0x01, 0x7F, 0x7F, 0x01, 0x01, 0x00}, // T
+    {0x00, 0x3F, 0x7F, 0x40, 0x40, 0x7F, 0x3F, 0x00}, // U
+    {0x00, 0x1F, 0x3F, 0x60, 0x60, 0x3F, 0x1F, 0x00}, // V
+    {0x00, 0x7F, 0x7F, 0x30, 0x18, 0x30, 0x7F, 0x7F}, // W
+    {0x00, 0x63, 0x77, 0x1C, 0x1C, 0x77, 0x63, 0x00}, // X
+    {0x00, 0x07, 0x0F, 0x78, 0x78, 0x0F, 0x07, 0x00}, // Y
+    {0x00, 0x61, 0x71, 0x59, 0x4D, 0x47, 0x43, 0x00}, // Z
+    {0x00, 0x00, 0x7F, 0x7F, 0x41, 0x41, 0x00, 0x00}, // [
+    {0x00, 0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01}, /* \ */
+    {0x00, 0x00, 0x41, 0x41, 0x7F, 0x7F, 0x00, 0x00}, // ]
+    {0x00, 0x08, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x08}, // ^
+    {0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80}, // _
+    {0x00, 0x00, 0x00, 0x04, 0x07, 0x03, 0x00, 0x00}, // `
+    {0x00, 0x20, 0x74, 0x54, 0x54, 0x7C, 0x78, 0x00}, // a
+    {0x00, 0x7E, 0x7E, 0x48, 0x48, 0x78, 0x30, 0x00}, // b
+    {0x00, 0x38, 0x7C, 0x44, 0x44, 0x44, 0x00, 0x00}, // c
+    {0x00, 0x30, 0x78, 0x48, 0x48, 0x7E, 0x7E, 0x00}, // d
+    {0x00, 0x38, 0x7C, 0x54, 0x54, 0x5C, 0x18, 0x00}, // e
+    {0x00, 0x00, 0x08, 0x7C, 0x7E, 0x0A, 0x0A, 0x00}, // f
+    {0x00, 0x98, 0xBC, 0xA4, 0xA4, 0xFC, 0x7C, 0x00}, // g
+    {0x00, 0x7E, 0x7E, 0x08, 0x08, 0x78, 0x70, 0x00}, // h
+    {0x00, 0x00, 0x48, 0x7A, 0x7A, 0x40, 0x00, 0x00}, // i
+    {0x00, 0x00, 0x80, 0x80, 0x80, 0xFA, 0x7A, 0x00}, // j
+    {0x00, 0x7E, 0x7E, 0x10, 0x38, 0x68, 0x40, 0x00}, // k
+    {0x00, 0x00, 0x42, 0x7E, 0x7E, 0x40, 0x00, 0x00}, // l
+    {0x00, 0x7C, 0x7C, 0x18, 0x38, 0x1C, 0x7C, 0x78}, // m
+    {0x00, 0x7C, 0x7C, 0x04, 0x04, 0x7C, 0x78, 0x00}, // n
+    {0x00, 0x38, 0x7C, 0x44, 0x44, 0x7C, 0x38, 0x00}, // o
+    {0x00, 0xFC, 0xFC, 0x24, 0x24, 0x3C, 0x18, 0x00}, // p
+    {0x00, 0x18, 0x3C, 0x24, 0x24, 0xFC, 0xFC, 0x00}, // q
+    {0x00, 0x7C, 0x7C, 0x04, 0x04, 0x0C, 0x08, 0x00}, // r
+    {0x00, 0x48, 0x5C, 0x54, 0x54, 0x74, 0x24, 0x00}, // s
+    {0x00, 0x04, 0x04, 0x3E, 0x7E, 0x44, 0x44, 0x00}, // t
+    {0x00, 0x3C, 0x7C, 0x40, 0x40, 0x7C, 0x7C, 0x00}, // u
+    {0x00, 0x1C, 0x3C, 0x60, 0x60, 0x3C, 0x1C, 0x00}, // v
+    {0x00, 0x1C, 0x7C, 0x70, 0x38, 0x70, 0x7C, 0x1C}, // w
+    {0x00, 0x44, 0x6C, 0x38, 0x38, 0x6C, 0x44, 0x00}, // x
+    {0x00, 0x9C, 0xBC, 0xA0, 0xE0, 0x7C, 0x3C, 0x00}, // y
+    {0x00, 0x44, 0x64, 0x74, 0x5C, 0x4C, 0x44, 0x00}, // z
+    {0x00, 0x00, 0x41, 0x41, 0x77, 0x3E, 0x08, 0x08}, // {
+    {0x00, 0x00, 0x00, 0x77, 0x77, 0x00, 0x00, 0x00}, // |
+    {0x00, 0x00, 0x08, 0x08, 0x3E, 0x77, 0x41, 0x41}, // }
+    {0x00, 0x01, 0x03, 0x02, 0x03, 0x01, 0x03, 0x02}, // ~
+    {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, // DEL
+    {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}  // CURSOR
+};
diff --git a/stn/stn.c b/stn/stn.c
new file mode 100644
index 0000000..7ad307a
--- /dev/null
+++ b/stn/stn.c
@@ -0,0 +1,236 @@
+#include <zeta.h>
+
+#include <stdint.h>
+
+#define NOP                                     \
+    do {                                        \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+        __asm__("nop");                         \
+    } while (0)
+
+// extern const uint8_t font[97][8];
+
+static inline void
+stn_display_on(void)
+{
+    stn_1_inst = 0x3F;
+    NOP;
+    stn_2_inst = 0x3F;
+    NOP;
+}
+
+static inline
+void stn_start_line(uint8_t x)
+{
+    stn_1_inst = 0xC0 | (x & 0x3F);
+    NOP;
+    NOP;
+    NOP;
+    stn_2_inst = 0xC0 | (x & 0x3F);
+    NOP;
+    NOP;
+    NOP;
+}
+
+static inline void
+stn_set_row(uint8_t x)
+{
+    stn_1_inst = 0xB8 | x;
+    NOP;
+    NOP;
+    NOP;
+    stn_2_inst = 0xB8 | x;
+    NOP;
+    NOP;
+    NOP;
+}
+
+
+static inline void
+stn_set_column(uint8_t x)
+{
+    if (x & 0xC0)
+        stn_2_inst = 0x40 | (x >> 6);
+    else
+        stn_1_inst = 0x40 | x;
+
+    NOP;
+    NOP;
+    NOP;
+}
+
+static inline void
+stn_set_columns(uint8_t x)
+{
+    stn_1_inst = 0x40 | x;
+    NOP;
+    NOP;
+    NOP;
+    stn_2_inst = 0x40 | x;
+    NOP;
+    NOP;
+    NOP;
+}
+
+void
+stn_clear_screen(void)
+{
+    for (uint8_t i = 0; i < 8; ++i) {
+        // set x address
+        stn_set_row(i);
+
+        // set y address
+        stn_set_columns(0);
+
+        for (uint8_t j = 0; j < 64; ++j) {
+            stn_1_data = 0;
+            NOP;
+            NOP;
+            NOP;
+            stn_2_data = 0;
+            NOP;
+            NOP;
+            NOP;
+        }
+    }
+}
+
+/* void */
+/* stn_print(int x, int y, const char *str) */
+/* { */
+/*     stn_set_row(y); */
+/*     stn_set_column(x << 3); */
+
+/*     while (*str) { */
+/*         const uint8_t *p = font[(*str++) - ' ']; */
+
+/*         if (x < 8) { */
+/*             for (uint8_t i = 0; i < 8; ++i) */
+/*                 stn_1_data = p[i]; */
+/*         } else { */
+/*             for (uint8_t i = 0; i < 8; ++i) */
+/*                 stn_2_data = p[i]; */
+/*         } */
+
+/*         if (++x & 0xF0) { */
+/*             x = 0; */
+/*             stn_set_row(++y & 0x07); */
+/*             stn_set_columns(0); */
+/*         } */
+/*     } */
+/* } */
+
+int
+main(void)
+{
+    stn_display_on();
+    stn_start_line(0);
+    stn_clear_screen();
+    // stn_print(1, 1, "Hello World! how are you");
+    stn_set_columns(0);
+
+    while (1) {
+        stn_set_columns(0);
+
+        for (uint8_t i = 0; i < 64; ++i) {
+            stn_1_data = i;
+            NOP;
+            NOP;
+            NOP;
+        }
+
+        volatile uint8_t c;
+        for (uint8_t i = 0; i < 9; ++i) {
+            c = stn_1_data;
+            NOP;
+            NOP;
+            NOP;
+        }
+
+
+        /* for (uint8_t i = 0; i < 64; ++i) { */
+        /*     stn_2_data = i; */
+        /*     NOP; */
+        /* } */
+
+        stn_1_inst = 0x40 | 0;
+        NOP;
+        NOP;
+        NOP;
+
+        /* // stn_set_columns(0); */
+        for (uint8_t i = 0; i < 64; ++i) {
+            c = stn_1_data;
+            NOP;
+            NOP;
+            NOP;
+            stn_2_data = c;
+            NOP;
+            NOP;
+            NOP;
+        }
+    }
+
+    // return 0;
+}