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-rw-r--r--stn/Makefile40
-rw-r--r--stn/crt0.asm66
-rw-r--r--stn/font.c101
-rw-r--r--stn/stn.c236
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;
+}
generated by cgit v1.2.3 (git 2.45.2) at 2024-12-29 08:05:35 +0000