summaryrefslogtreecommitdiffstats
path: root/sw/z80_test
diff options
context:
space:
mode:
Diffstat (limited to 'sw/z80_test')
-rw-r--r--sw/z80_test/crt0.s103
-rw-r--r--sw/z80_test/ctc.c7
-rw-r--r--sw/z80_test/ctc.h6
-rw-r--r--sw/z80_test/devices.h15
-rw-r--r--sw/z80_test/main.c11
-rw-r--r--sw/z80_test/makefile52
-rw-r--r--sw/z80_test/pio.c40
-rw-r--r--sw/z80_test/pio.h37
-rw-r--r--sw/z80_test/types.h13
-rw-r--r--sw/z80_test/usart.c91
-rw-r--r--sw/z80_test/usart.h155
11 files changed, 0 insertions, 530 deletions
diff --git a/sw/z80_test/crt0.s b/sw/z80_test/crt0.s
deleted file mode 100644
index 7701ca6..0000000
--- a/sw/z80_test/crt0.s
+++ /dev/null
@@ -1,103 +0,0 @@
-;--------------------------------------------------------------------------
-; crt0.s - Generic crt0.s for a Z80
-;
-; Copyright (C) 2000, Michael Hope
-;
-; This library is free software; you can redistribute it and/or modify it
-; under the terms of the GNU General Public License as published by the
-; Free Software Foundation; either version 2, or (at your option) any
-; later version.
-;
-; This library is distributed in the hope that it will be useful,
-; but WITHOUT ANY WARRANTY; without even the implied warranty of
-; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-; GNU General Public License for more details.
-;
-; You should have received a copy of the GNU General Public License
-; along with this library; see the file COPYING. If not, write to the
-; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
-; MA 02110-1301, USA.
-;
-; As a special exception, if you link this library with other files,
-; some of which are compiled with SDCC, to produce an executable,
-; this library does not by itself cause the resulting executable to
-; be covered by the GNU General Public License. This exception does
-; not however invalidate any other reasons why the executable file
-; might be covered by the GNU General Public License.
-;--------------------------------------------------------------------------
-
- .module crt0
- .globl _main
-
- .area _HEADER (ABS)
- ;; Reset vector
- .org 0
- jp init
-
- .org 0x08
- reti
- .org 0x10
- reti
- .org 0x18
- reti
- .org 0x20
- reti
- .org 0x28
- reti
- .org 0x30
- reti
- .org 0x38
- reti
-
- .org 0x100
-init:
- ;; Set stack pointer directly above top of memory.
- ld sp,#0xFFFF
-
- ;; Initialise global variables
- call gsinit
- call _main
- jp _exit
-
- ;; 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
-
-__clock::
- ld a,#2
- rst 0x08
- ret
-
-_exit::
- ;; Exit - special code to the emulator
- ld a,#0
- rst 0x08
-1$:
- halt
- jr 1$
-
- .area _GSINIT
-gsinit::
- ; 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/sw/z80_test/ctc.c b/sw/z80_test/ctc.c
deleted file mode 100644
index 3a4e7d5..0000000
--- a/sw/z80_test/ctc.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "ctc.h"
-
-void ctc_control()
-{
-
-}
-
diff --git a/sw/z80_test/ctc.h b/sw/z80_test/ctc.h
deleted file mode 100644
index c6b3150..0000000
--- a/sw/z80_test/ctc.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __CTC_H__
-#define __CTC_H__
-
-void ctc_control();
-
-#endif /* __CTC_H__ */ \ No newline at end of file
diff --git a/sw/z80_test/devices.h b/sw/z80_test/devices.h
deleted file mode 100644
index a846f9b..0000000
--- a/sw/z80_test/devices.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef __DEVICES_H__
-#define __DEVICES_H__
-
-#define ADDR_DEV_ROM_L 0x0000
-#define ADDR_DEV_ROM_H 0x2000
-
-#define ADDR_DEV_USART 0x4000
-#define ADDR_DEV_CTC 0x4100
-#define ADDR_DEV_PIO 0x4200
-
-#define ADDR_DEV_MMU
-
-#define ADDR_DEV_RAM 0x8000
-
-#endif
diff --git a/sw/z80_test/main.c b/sw/z80_test/main.c
deleted file mode 100644
index d2e1d8e..0000000
--- a/sw/z80_test/main.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "usart.h"
-
-void main(void)
-{
- usart_init(USART_BAUDRATE_1200, USART_PARITY_EVEN, USART_STOP_BITS_1);
- usart_write("Hello, World!\n", 13);
-
- while(1) {
- usart_write("done\n", 5);
- }
-}
diff --git a/sw/z80_test/makefile b/sw/z80_test/makefile
deleted file mode 100644
index 6f054ae..0000000
--- a/sw/z80_test/makefile
+++ /dev/null
@@ -1,52 +0,0 @@
-####
-# source code settings
-#
-OSNAME := sample
-
-CSOURCES := $(wildcard *.c)
-
-OBJECTS := $(patsubst %.c,build/%.rel,$(CSOURCES))
-HEXFILE := build/$(OSNAME).hex
-BINARY := build/$(OSNAME).bin
-
-###
-# compiler settings
-
-CC := sdcc
-
-CFLAGS := -mz80 \
- -I . \
- -DDEBUG
-
-LDFLAGS := -mz80 --no-std-crt0 build/crt0.rel \
- --std-c89 -pedantic \
- --code-loc 0x0800 --data-loc 0x2000
-
-.PHONY: dirs dis clean
-all: $(BINARY)
-
-# build binary
-$(BINARY): $(OBJECTS) dirs
- $(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE)
- @# xxd -r -p $(HEXFILE) $(BINARY)
- @# makebin -s 16384 $(HEXFILE) $(BINARY)
- makebin -s 8192 $(HEXFILE) $(BINARY)
-
-$(OBJECTS): build/%.rel : %.c $(CSOURCES) dirs build/crt0.rel
- @printf "\n"
- $(CC) $(CFLAGS) -c $< -o $@
-
-build/crt0.rel: crt0.s
- sdasz80 -o $<
- @mv crt0.rel build/
-
-dirs:
- mkdir -p build
-
-dis: $(BINARY)
- @# z80dasm -a -l -g 0h $< -o build/$(OSNAME).s
- dz80 -b -n $<
-
-clean:
- - rm -rd build/*
- - rm crt0.rel
diff --git a/sw/z80_test/pio.c b/sw/z80_test/pio.c
deleted file mode 100644
index 5ca9149..0000000
--- a/sw/z80_test/pio.c
+++ /dev/null
@@ -1,40 +0,0 @@
-#include "pio.h"
-
-static uint8_t *pio_port = (uint8_t *) ADDR_DEV_PIO;
-static uint8_t *pio_ctrl = (uint8_t *) (ADDR_DEV_PIO + 2);
-
-inline void _pio_data(int port, uint8_t data)
-{
- *(pio_port + port) = data;
-}
-
-inline void _pio_control(int port, uint8_t cmd)
-{
- *(pio_ctrl + port) = cmd;
-}
-
-void pio_set_mode(int port, int mode, uint8_t io)
-{
- // 0x0F is a control sequence to set mode
- _pio_control(port, ((mode << 6) | 0x0F));
-
- // this mode requires an additional argument that sets
- // a mode for each pin
- if (mode == PIO_MODE_BIT_IO) {
- _pio_control(port, io);
- }
-}
-
-void pio_set_interrupts(int port, int control)
-{
- // 0x07 is a control sequence to set interrupts
- _pio_control(port, (control | 0x07));
-}
-
-void pio_set_interrupts_mask(int port, int control, uint8_t mask)
-{
- // 0x17 is a control sequence to set interrupts
- // and to interpret the next byte as a mask
- _pio_control(port, (control | 0x17));
- _pio_control(port, mask);
-}
diff --git a/sw/z80_test/pio.h b/sw/z80_test/pio.h
deleted file mode 100644
index 0df2ed0..0000000
--- a/sw/z80_test/pio.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef __PIO_H__
-#define __PIO_H__
-
-#include "devices.h"
-#include "types.h"
-
-#define PIO_A 0
-#define PIO_B 1
-
-#define PIO_MODE_BYTE_IN 0
-#define PIO_MODE_BYTE_OUT 1
-#define PIO_MODE_BYTE_BI 2
-#define PIO_MODE_BIT_IO 3
-
-#define PIO_INT_ACTIVE_HIGH (1<<5)
-#define PIO_INT_AND_MODE (1<<6)
-#define PIO_INT_ENABLE (1<<7)
-
-
-inline void _pio_data(int port, uint8_t data);
-inline void _pio_control(int port, uint8_t cmd);
-
-void pio_set_mode(int port, int mode, uint8_t io);
-
-void pio_set_interrupts(int port, int control);
-void pio_set_interrupts_mask(int port, int control, uint8_t mask);
-
-// uint8_t pio_read_data(int port);
-uint8_t pio_read(int port);
-void pio_write(int port, uint8_t data);
-
-inline int pio_read_pin(int port, uint8_t pin);
-inline void pio_write_pin(int port, uint8_t pin);
-
-// TODO: implement mode (in/out/both) and interrupt vector
-
-#endif // __PIO_H__
diff --git a/sw/z80_test/types.h b/sw/z80_test/types.h
deleted file mode 100644
index 815fc68..0000000
--- a/sw/z80_test/types.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef __TYPES_H__
-#define __TYPES_H__
-
-/* only types from primitive types are defined in this file */
-
-typedef volatile unsigned char register_t;
-
-typedef unsigned int uint;
-typedef char int8_t;
-typedef unsigned char uint8_t;
-typedef int int16_t;
-typedef unsigned int uint16_t;
-#endif
diff --git a/sw/z80_test/usart.c b/sw/z80_test/usart.c
deleted file mode 100644
index 9ec6dbd..0000000
--- a/sw/z80_test/usart.c
+++ /dev/null
@@ -1,91 +0,0 @@
-#include "usart.h"
-
-static struct _usart_device *_usart = (struct _usart_device *) ADDR_DEV_USART;
-
-void usart_set_baudrate(uint16_t baudrate)
-{
- // enable latch access
- _usart->LCR.divisor_latch_access = 1;
- _usart->buffer = 0x00FF & baudrate; // LSBs
- memcpy(&_usart->IER, &(baudrate >>8), 1);
- // _usart->IER = 0x00FF & (baudrate >> 8); // MSBs
- _usart->LCR.divisor_latch_access = 0;
-}
-
-void usart_set_parity(int mode)
-{
- if (mode == USART_PARITY_EVEN) {
- _usart->LCR.even_parity = 1;
- }
- else if (mode == USART_PARITY_ODD) {
- _usart->LCR.even_parity = 0;
- }
-
- _usart->LCR.parity = (mode == USART_PARITY_NONE) ? 0 : 1;
-}
-
-void usart_set_stop_bits(int count)
-{
- _usart->LCR.stop_bits = (count == USART_STOP_BITS_1) ? 0 : 1;
-}
-
-void usart_word_length(int length)
-{
- _usart->LCR.word_length = length;
-}
-
-void usart_set_autoflow(int mode)
-{
- _usart->MCR.autoflow = (mode == USART_AUTOFLOW_OFF) ? 0 : 1;
- _usart->MCR.data_terminal_ready = (mode == USART_AUTOFLOW_ALL);
-}
-
-inline void usart_init(uint16_t baudrate, int parity, int stop_bits)
-{
- usart_set_baudrate(baudrate);
- usart_set_parity(parity);
- usart_set_stop_bits(stop_bits);
- usart_set_autoflow(USART_AUTOFLOW_OFF);
-}
-
-void usart_transmit(uint8_t data)
-{
- _usart->buffer = data;
- while (_usart->LSR.transmitter_holder_empty == 0); // wait
-}
-
-uint8_t usart_receive()
-{
- return _usart->buffer;
-}
-
-int usart_write(uint8_t *data, size_t size)
-{
- uint8_t *dp = data;
-
- while (size--) {
- _usart->buffer = *(dp++);
- while (_usart->LSR.transmitter_empty);
- }
-
- // TODO: do something that actually counts for sent bytes
- return size;
-}
-
-int usart_read(uint8_t *buffer, size_t count)
-{
- uint8_t *bp = buffer;
- size_t read_count = 0;
-
- while (count--) {
- *(bp++) = _usart->buffer;
- // check for errors
- if (_usart->LSR.framing_error || _usart->LSR.parity_error) {
- bp--; // delete last byte (?)
- } else {
- read_count++;
- }
- }
-
- return read_count;
-}
diff --git a/sw/z80_test/usart.h b/sw/z80_test/usart.h
deleted file mode 100644
index b85ee3e..0000000
--- a/sw/z80_test/usart.h
+++ /dev/null
@@ -1,155 +0,0 @@
-#ifndef __USART_H__
-#define __USART_H__
-
-#include "types.h"
-#include "devices.h"
-
-#include "string.h"
-
-// baudrate clock divisors
-// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal)
-#define USART_BAUDRATE_50 2304
-#define USART_BAUDRATE_75 1536
-#define USART_BAUDRATE_110 1047
-#define USART_BAUDRATE_134_5 857
-#define USART_BAUDRATE_150 768
-#define USART_BAUDRATE_300 384
-#define USART_BAUDRATE_600 192
-#define USART_BAUDRATE_1200 96
-#define USART_BAUDRATE_1800 64
-#define USART_BAUDRATE_2000 58
-#define USART_BAUDRATE_2400 48
-#define USART_BAUDRATE_3600 32
-#define USART_BAUDRATE_4800 24
-#define USART_BAUDRATE_7200 16
-#define USART_BAUDRATE_9600 12
-#define USART_BAUDRATE_19200 6
-#define USART_BAUDRATE_38400 3
-#define USART_BAUDRATE_56000 3
-
-// parity
-#define USART_PARITY_NONE 0
-#define USART_PARITY_EVEN 1
-#define USART_PARITY_ODD 2
-
-// stop bits
-#define USART_STOP_BITS_1 10
-#define USART_STOP_BITS_15 15
-#define USART_STOP_BITS_2 20
-
-// word lenght
-#define USART_WORD_LENGTH_5 0
-#define USART_WORD_LENGTH_6 1
-#define USART_WORD_LENGTH_7 2
-#define USART_WORD_LENGTH_8 3
-
-// autoflow
-#define USART_AUTOFLOW_ALL 3
-#define USART_AUTOFLOW_CTS 2
-#define USART_AUTOFLOW_OFF 0
-
-/* stuctures for usart registers */
-struct IER
-{
- volatile uint received_data_interrupt :1;
- volatile uint transmitter_empty_interrupt :1;
- volatile uint receiver_line_status_interrupt :1;
- volatile uint modem_status_interrupt :1;
- volatile uint reserved :4;
-};
-
-struct IIR
-{
- volatile uint interrupt_pending :1;
- volatile uint interrupt_id :3;
- volatile uint reserved :2;
- volatile uint fifos :2;
-};
-
-struct FCR
-{
- volatile uint fifo_enable :1;
- volatile uint receiver_fifo_rst :1;
- volatile uint trasmitter_fifo_rst :1;
- volatile uint dma_mode_select :1;
- volatile uint reserved :1;
- volatile uint receiver_trigger :2;
-};
-
-struct LCR
-{
- volatile uint word_length :2;
- volatile uint stop_bits :1;
- volatile uint parity :1;
- volatile uint even_parity :1;
- volatile uint stick_parity :1;
- volatile uint break_control :1;
- volatile uint divisor_latch_access :1;
-};
-
-struct MCR
-{
- volatile uint data_terminal_ready :1;
- volatile uint request_to_send :1;
- volatile uint out1;
- volatile uint out2;
- volatile uint loop;
- volatile uint autoflow :1;
- volatile uint reserved :2;
-};
-
-struct LSR
-{
- volatile uint data_ready :1;
- volatile uint overrun_error :1;
- volatile uint parity_error :1;
- volatile uint framing_error :1;
- volatile uint break_interrupt :1;
- volatile uint transmitter_holder_empty :1;
- volatile uint transmitter_empty :1;
- volatile uint fifo_recv_error :1;
-};
-
-struct MSR
-{
- volatile uint delta_cts :1;
- volatile uint delta_data_set_ready :1;
- volatile uint trailing_edge_ring_indicator :1;
- volatile uint delta_data_carrier_detect :1;
- volatile uint clear_to_send :1;
- volatile uint data_set_ready :1;
- volatile uint ring_indicator :1;
- volatile uint data_carrier_detect :1;
-};
-
-/* this structure is only for internal usage */
-struct _usart_device
-{
- register_t buffer; // also used as LSB for divisor latch
- struct IER IER;
- struct IIR IIR;
- struct FCR FCR;
- struct LCR LCR;
- struct MCR MCR;
- struct LSR LSR;
- struct MSR MSR;
- register_t scratch;
-};
-
-
-// setup functions (wrappers)
-void usart_set_baudrate(uint16_t baudrate);
-void usart_set_parity(int mode);
-void usart_set_stop_bits(int count);
-void usart_set_word_length(int length);
-void usart_set_autoflow(int mode);
-
-inline void usart_init(uint16_t baudrate, int parity, int stop_bits);
-
-void usart_transmit(uint8_t data);
-uint8_t usart_receive();
-
-int usart_write(uint8_t *data, size_t size);
-int usart_read(uint8_t *buffer, size_t count);
-
-#endif // __USART__H__
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-15 04:21:29 +0100