First commit
This commit is contained in:
Piotr Jaczewski
commit
f614cffe86
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@ -0,0 +1,6 @@
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*.xcodeproj
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*.hex
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*.elf
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*.o
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*.bin
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*.label
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@ -0,0 +1,32 @@
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GAL20V8
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EQN2JED - Boolean Equations to JEDEC file assembler (Version V101)
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Copyright (c) National Semiconductor Corporation 1990-1993
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Assembled from "d:/ADDRES~1.EQN". Date: 3-31-120
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*
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NOTE PINS RW:2 A0:3 A1:4 A2:5 A3:6 A4:7 A5:8 A6:9 A7:10 A8:11*
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NOTE PINS GND:12 A9:14 A10:15 A11:16 SR:17 RD:18 WD:19 ROM:20*
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NOTE PINS NC1:21 NC2:22 R:23 VCC:24*
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NOTE GALMODE SMALL*
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QF2706*QP24*F0*
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L0640
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1111111011111111111111111111111111110111
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1111111011111111111111111111111111011111
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1111111011111111111111111111110111111111
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1111111011111111111111111101111111111111*
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L0960
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1011011010111011101110111010101001101011*
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L1280
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0111101010111011101110111010101001101011*
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L1600
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0111101010111011101110111010101010101011*
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L2560
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11011100*
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L2632
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00000011*
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L2640
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0000000000000000111100001000000010000000100000000000000000000000*
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L2704
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10*
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C1C79*
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0000
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@ -0,0 +1,20 @@
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chip GAL20V8
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NC3=1 RW=2 A0=3 A1=4 A2=5 A3=6 A4=7 A5=8 A6=9 A7=10 A8=11 GND=12
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A9=14 A10=15 A11=16 SR=17 RD=18 WD=19 ROM=20
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R=23 VCC=24
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NC1=21 NC2=22
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equations
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NC1=gnd
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NC2=gnd
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SR = /A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * /A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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RD = /A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * A7 * /A8 * /A9 * /A10 * /A11 * /R * RW
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WD = A0 * /A1 * /A2 * /A3 * /A4 * /A5 * /A6 * A7 * /A8 * /A9 * /A10 * /A11 * /R * /RW
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/ROM = A8 * /R * RW
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+ A9 * /R * RW
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+ A10 * /R * RW
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+ A11 * /R * RW
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@ -0,0 +1,3 @@
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#!/bin/sh
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xa -W -C -v -O ASCII -c src/apple1serial.xa -l apple1serial.label -o apple1serial.bin
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@ -0,0 +1,53 @@
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# Name: apple1serial
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# Author: flovenol@gmail.com
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DEVICE = atmega328p
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CLOCK = 16000000
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PROGRAMMER = -c stk500v2 -P /dev/tty.usbmodemavrdope1
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OBJECTS = main.o
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# For computing fuse byte values for other devices and options see
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# the fuse bit calculator at http://www.engbedded.com/fusecalc/
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FUSES = -U hfuse:w:0xde:m -U lfuse:w:0xff:m -U efuse:w:0xfd:m
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AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE)
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COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE)
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all: main.hex
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.c.o:
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$(COMPILE) -c $< -o $@
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.S.o:
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$(COMPILE) -x assembler-with-cpp -c $< -o $@
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.c.s:
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$(COMPILE) -S $< -o $@
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flash: all
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$(AVRDUDE) -U flash:w:main.hex:i
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fuse:
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$(AVRDUDE) $(FUSES)
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install: flash fuse
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load: all
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bootloadHID main.hex
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clean:
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rm -f main.hex main.elf $(OBJECTS)
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main.elf: $(OBJECTS)
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$(COMPILE) -o main.elf $(OBJECTS)
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main.hex: main.elf
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rm -f main.hex
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avr-objcopy -j .text -j .data -O ihex main.elf main.hex
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avr-size --format=avr --mcu=$(DEVICE) main.elf
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disasm: main.elf
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avr-objdump -d main.elf
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cpp:
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$(COMPILE) -E main.c
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@ -0,0 +1,177 @@
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#ifndef F_CPU
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#define F_CPU 16000000UL
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#endif
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#define BAUD 9600
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/setbaud.h>
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#define DATA_READ_LINE PB0
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#define DATA_WRITE_LINE PD7
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#define STATUS PD6
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#define DATA0 PB1
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#define DATA1 PB2
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#define DATA2 PB3
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#define DATA3 PB4
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#define DATA4 PB5
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#define DATA5 PD2
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#define DATA6 PD3
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#define DATA7 PD4
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typedef enum {NONE, READ, WRITE} mode_t;
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mode_t mode = NONE;
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uint8_t data = 0x00;
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uint8_t upper_part = 0x00;
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uint8_t lower_part = 0x00;
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uint8_t data_write_interrupt_count = 0;
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uint8_t data_read_interrupt_count = 0;
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// Registers: PCMSK0, PCMSK1, PCMSK2 :registers that enable or disable pin-change interrupts
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// on individual pins
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// PCICR : a register where the three least significant bits enable or disable pin change interrupts
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// on a range of pins, i.e. {0,0,0,0,0,PCIE2,PCIE1,PCIE0}, where PCIE2 maps to PCMSK2, PCIE1 maps to PCMSK1,
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// and PCIE0 maps to PCMSK0.
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inline void ready() {
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PORTD |= _BV(STATUS);
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}
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inline void not_ready() {
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PORTD &= ~(_BV(STATUS));
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}
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void setup() {
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// set input on DATA_READ_LINE
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DDRB &= ~(_BV(DATA_READ_LINE));
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// interrupt on DATA_READ_LINE change
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PCMSK0 |= _BV(PCINT0);
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PCICR |= _BV(PCIE0);
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// set input on DATA_WRITE_LINE
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DDRD &= ~(_BV(DATA_WRITE_LINE));
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// interrupt on DATA_WRITE_LINE change
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PCMSK2 |= _BV(PCINT23);
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PCICR |= _BV(PCIE2);
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UBRR0H = UBRRH_VALUE;
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UBRR0L = UBRRL_VALUE;
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UCSR0A = 0x00;
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UCSR0C = 0x00;
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// 8 bits of data, 1 stop bit, no parity
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UCSR0C = _BV(UCSZ00) | _BV(UCSZ01);
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// TXD pullup
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PORTD |= _BV(PD1);
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// interrupt on DATA_READ_LINE change
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PCMSK0 |= _BV(PCINT0);
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PCICR |= _BV(PCIE0);
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// set output on status
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DDRD |= _BV(STATUS);
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not_ready();
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// enable global interrupts
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sei();
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}
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// data read line
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ISR(PCINT0_vect) {
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if (data_read_interrupt_count == 0) {
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if (mode != READ) {
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mode = READ;
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// enable RXD and it's interrupt
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UCSR0B = _BV(RXEN0) | _BV(RXCIE0);
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// set output on data pins
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DDRD |= _BV(DATA5) | _BV(DATA6) | _BV(DATA7);
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DDRB |= _BV(DATA0) | _BV(DATA1) | _BV(DATA2) | _BV(DATA3) | _BV(DATA4);
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}
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not_ready();
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data_read_interrupt_count = 1;
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} else {
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data_read_interrupt_count = 0;
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}
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}
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// data write line
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ISR(PCINT2_vect) {
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upper_part = PINB;
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lower_part = PIND;
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if (data_write_interrupt_count == 0) {
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if (mode == WRITE) {
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upper_part = upper_part >> 1;
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upper_part &= 0x1f;
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lower_part = lower_part << 3;
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lower_part &= 0xe0;
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// set status to not ready
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PORTD &= ~(_BV(STATUS));
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// send byte
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loop_until_bit_is_set(UCSR0A, UDRE0);
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UDR0 = upper_part | lower_part;
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} else {
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if (mode == READ) {
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// zero all outputs
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PORTD &= 0xe3;
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PORTB &= 0xc1;
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}
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mode = WRITE;
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// enable TXD interrupt and it's interrupt
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UCSR0B = _BV(TXEN0) | _BV(TXCIE0);
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// set input on data pins
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DDRD &= ~(_BV(DATA5) | _BV(DATA6) | _BV(DATA7));
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DDRB &= ~(_BV(DATA0) | _BV(DATA1) | _BV(DATA2) | _BV(DATA3) | _BV(DATA4));
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ready();
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}
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data_write_interrupt_count = 1;
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} else {
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data_write_interrupt_count = 0;
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}
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}
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ISR(USART_RX_vect)
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{
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if (mode == READ) {
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data = UDR0;
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upper_part = (PORTD & 0xe3) | ((0xe0 & data)>>3);
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lower_part = (PORTB & 0xc1) | ((0x1f & data)<<1);
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PORTD = upper_part;
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PORTB = lower_part;
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ready();
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}
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}
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ISR(USART_TX_vect)
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{
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if (mode == WRITE) {
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ready();
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}
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}
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int main(void) {
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setup();
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for(;;){
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// only interrupt driven
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}
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return 0; /* never reached */
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}
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@ -0,0 +1,204 @@
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#define hex1l $50 ;End address of dump block
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#define hex1h $51
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#define hex2l $52 ;Begin address of dump block
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#define hex2h $53
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#define input $0200 ;Input buffer
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#define kbd_data $D010 ;PIA.A keyboard input
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#define kbd_cr $D011 ;PIA.A keyboard control register
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#define monitor $FF1A ;Escape back to monitor
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#define echo $FFEF ;Echo character to terminal
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#define prbyte $FFDC
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#define serial_ready $C000 ;Serial status
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#define serial_read $C080 ;Data read address
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#define serial_write $C081 ;Data write address
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;-------------------------------------------------------------------------
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; Constants
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||||
;-------------------------------------------------------------------------
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|
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#define R_LETTER $D2
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#define W_LETTER $D7
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#define ZERO $B0
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#define SEP $AE
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#define CR $8D ;Carriage Return
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#define ESC $9B ;ASCII ESC
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#define SPACE $A0
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|
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; pad first 256 bytes with zeroes
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.dsb 256, 0
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|
||||
; this section is almost identical to original WOZ ACI
|
||||
; adapted from https://www.sbprojects.net/projects/apple1/aci.php
|
||||
* = $C100
|
||||
apple_serial
|
||||
lda #CR ;Drop the cursor one line
|
||||
jsr echo
|
||||
lda #"*" ;Print prompt
|
||||
jsr echo
|
||||
lda #CR ;And drop the cursor one line
|
||||
jsr echo
|
||||
ldy #$FF ;Reset the input buffer index
|
||||
|
||||
next_char
|
||||
iny
|
||||
|
||||
kbd_wait
|
||||
lda kbd_cr ;Wait for a key
|
||||
bpl kbd_wait ;Still no key!
|
||||
|
||||
lda kbd_data ;Read key from keyboard
|
||||
sta $0200,Y ;Save it into buffer
|
||||
jsr echo ;And type it on the screen
|
||||
cmp #ESC
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||||
beq apple_serial ;Start from scratch if ESC!
|
||||
cmp #CR
|
||||
bne next_char ;Read keys until CR
|
||||
|
||||
ldx #$FF ;Initialize parse buffer pointer
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; Start parsing first or a new tape command
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
next_cmd
|
||||
lda #$00 ;Clear begin and end values
|
||||
sta hex1l
|
||||
sta hex1h
|
||||
sta hex2l
|
||||
sta hex2h
|
||||
|
||||
next_chr
|
||||
inx ;Increment input pointer
|
||||
lda $0200,X ;Get next char from input lin
|
||||
cmp #R_LETTER ;Read command?
|
||||
beq read ;Yes!
|
||||
cmp #W_LETTER ;Write command?
|
||||
beq write ;Yes! (note: CY=1)
|
||||
cmp #SEP ;Separator?
|
||||
beq separator ;Yes!
|
||||
cmp #CR ;End of line?
|
||||
beq to_monitor ;Escape to monitor! We're done
|
||||
cmp #SPACE ;Ignore spaces
|
||||
beq next_chr
|
||||
eor #ZERO ;Map digits to 0-9
|
||||
cmp #$0A ;Is it a decimal digit?
|
||||
bcc digit ;Yes!
|
||||
clc
|
||||
adc #$89 ;Map letter "A"-"F" to $FA-$FF
|
||||
cmp #$FA ;Hex letter?
|
||||
bcc apple_serial ;No! Character not hex!
|
||||
|
||||
digit
|
||||
asl ;Hex digit to MSD of A
|
||||
asl
|
||||
asl
|
||||
asl
|
||||
|
||||
ldy #4 ;Shift count
|
||||
|
||||
hexshift
|
||||
asl ;Hex digit left, MSB to carry
|
||||
rol hex1l ;Rotate into LSD
|
||||
rol hex1h ;Rotate into MSD
|
||||
dey ;Done 4 shifts?
|
||||
bne hexshift ;No! Loop
|
||||
beq next_chr ;Handle next character
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; Return to monitor, prints \ first
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
to_monitor
|
||||
jmp monitor ;Escape back to monitor
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; Separating . found. Copy HEX1 to Hex2. Doesn't clear HEX1!!!
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
separator
|
||||
lda hex1l ;Copy hex value 1 to hex value 2
|
||||
sta hex2l
|
||||
lda hex1h
|
||||
sta hex2h
|
||||
lda #$00 ;Original ACI bug (not enough ROM space?) fix
|
||||
sta hex1l
|
||||
sta hex1h
|
||||
jmp next_chr ;Always taken!
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; Read procedure
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
read
|
||||
lda serial_read ;Enable read mode
|
||||
ldy #$00
|
||||
|
||||
read_byte
|
||||
lda serial_ready
|
||||
beq read_byte ;No data arrived
|
||||
lda serial_read ;Read byte
|
||||
sta ($52),Y ;Store byte under address
|
||||
|
||||
lda hex2l
|
||||
cmp hex1l ;Compare lower destination address half with lower end address half
|
||||
bne read_next ;If not equal then increment destination address
|
||||
|
||||
lda hex2h
|
||||
cmp hex1h ;Compare upper destination address half with upper end address half
|
||||
bne read_next ;If not equal then proceed to read next byte
|
||||
|
||||
jmp next_cmd ;Read is completed, proceed to next command
|
||||
|
||||
read_next
|
||||
ldx #hex2l
|
||||
jsr increment_16bit ;Increment destination address
|
||||
jmp read_byte
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; Write procedure
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
write
|
||||
lda serial_read ;Enable read mode to be sure that we are in "fresh" write mode
|
||||
sta serial_write ;Enable write mode
|
||||
ldy #$00
|
||||
|
||||
write_byte
|
||||
lda serial_ready
|
||||
beq write_byte
|
||||
lda ($52),Y
|
||||
sta serial_write
|
||||
|
||||
lda hex2l
|
||||
cmp hex1l ;Compare lower destination address half with lower end address half
|
||||
bne write_next ;If not equal then increment destination address
|
||||
|
||||
lda hex2h
|
||||
cmp hex1h ;Compare upper destination address half with upper end address half
|
||||
bne write_next ;If not equal then proceed to write next byte
|
||||
|
||||
jmp next_cmd ;Read is completed, proceed to next command
|
||||
|
||||
write_next
|
||||
ldx #hex2l
|
||||
jsr increment_16bit ;Increment destination address
|
||||
jmp write_byte
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
; tool routines
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
increment_16bit
|
||||
inc $00,X
|
||||
bne increment_16bit_done
|
||||
inx
|
||||
inc $00,X
|
||||
increment_16bit_done
|
||||
rts
|
||||
|
||||
;-------------------------------------------------------------------------
|
||||
|
||||
end_of_apple1serial
|
||||
;#include "src/tests.xa"
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
#define echo $FFEF
|
||||
#define kbd_data $D010
|
||||
#define kbd_cr $D011
|
||||
#define serial_ready $C000
|
||||
#define serial_read $C080
|
||||
#define serial_write $C081
|
||||
|
||||
* = $C200
|
||||
.dsb (*-end_of_apple1serial), 0
|
||||
|
||||
; teletype on apple-1
|
||||
* = $C200
|
||||
teletype_apple1 = $C200
|
||||
lda serial_read
|
||||
wait
|
||||
lda serial_ready
|
||||
beq wait
|
||||
lda serial_read
|
||||
jsr echo
|
||||
jmp wait
|
||||
end_of_teletype_apple1
|
||||
|
||||
; AD 80 C0 AD 00 C0 F0 FB
|
||||
; AD 80 C0 20 EF FF 4C 03
|
||||
; 00
|
||||
|
||||
; teletype on remote
|
||||
* = $C300
|
||||
.dsb (*-end_of_teletype_apple1), 0
|
||||
|
||||
* = $C300
|
||||
teletype_remote = $C300
|
||||
lda #$FF
|
||||
sta serial_write
|
||||
get_key
|
||||
lda kbd_cr
|
||||
bpl get_key
|
||||
lda kbd_data
|
||||
sec
|
||||
sbc #$A0
|
||||
sta serial_write
|
||||
jmp get_key
|
||||
end_of_teletype_remote
|
||||
|
||||
; A9 FF 8D 81 C0 AD 11 D0
|
||||
; 10 FB AD 10 D0 38 E9 A0
|
||||
; 8D 81 C0 4C 85 02
|
||||
|
||||
; 0-255 repeating counter over TXD
|
||||
* = $C400
|
||||
.dsb (*-end_of_teletype_remote), 0
|
||||
|
||||
* = $C400
|
||||
counter_remote = $C400
|
||||
ldy #$00
|
||||
sta serial_write
|
||||
check_ready
|
||||
lda serial_ready
|
||||
beq check_ready
|
||||
tya
|
||||
sta serial_write
|
||||
iny
|
||||
jmp check_ready
|
||||
|
||||
; A0 00 8D 81 C0 AD 00 C0
|
||||
; F0 FB 98 8D 81 C0 C8 4C
|
||||
; 85 02
|
||||
Loading…
Reference in New Issue