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Readme fix

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Paul Warren 2 years ago
parent
commit
99c0c46212
  1. 45
      6502-monitor.ino
  2. 4
      README.md
  3. 24
      makerom.py

45
6502-monitor.ino

@ -1,45 +0,0 @@
const char ADDR[] = {22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52};
const char DATA[] = {39, 41, 43, 45, 47, 49, 51, 53};
#define CLOCK 2
#define READ_WRITE 3
void setup() {
for (int n = 0; n < 16; n += 1) {
pinMode(ADDR[n], INPUT);
}
for (int n = 0; n < 8; n += 1) {
pinMode(DATA[n], INPUT);
}
pinMode(CLOCK, INPUT);
pinMode(READ_WRITE, INPUT);
attachInterrupt(digitalPinToInterrupt(CLOCK), onClock, RISING);
Serial.begin(57600);
}
void onClock() {
char output[15];
unsigned int address = 0;
for (int n = 0; n < 16; n += 1) {
int bit = digitalRead(ADDR[n]) ? 1 : 0;
Serial.print(bit);
address = (address << 1) + bit;
}
Serial.print(" ");
unsigned int data = 0;
for (int n = 0; n < 8; n += 1) {
int bit = digitalRead(DATA[n]) ? 1 : 0;
Serial.print(bit);
data = (data << 1) + bit;
}
sprintf(output, " %04x %c %02x", address, digitalRead(READ_WRITE) ? 'r' : 'W', data);
Serial.println(output);
}
void loop() {
}

4
README.md

@ -1,5 +1,3 @@
# 6502
Various 6502 related pieces, not 100% sure on licensing, but all the bits are based on the Ben Eater youtube series at:
()[https://www.youtube.com/watch?v=LnzuMJLZRdU&list=PLowKtXNTBypFbtuVMUVXNR0z1mu7dp7eH]
Various 6502 related pieces, not 100% sure on licensing, but all the bits are based on the Ben Eater youtube series on [youtube](https://www.youtube.com/watch?v=LnzuMJLZRdU&list=PLowKtXNTBypFbtuVMUVXNR0z1mu7dp7eH).

24
makerom.py

@ -1,24 +0,0 @@
#
# Please see this video for details:
# https://www.youtube.com/watch?v=yl8vPW5hydQ
#
code = bytearray([
0xa9, 0xff, # lda #$ff
0x8d, 0x02, 0x60, # sta $6002
0xa9, 0x55, # lda #$55
0x8d, 0x00, 0x60, # sta $6000
0xa9, 0xaa, # lda #$aa
0x8d, 0x00, 0x60, # sta $6000
0x4c, 0x05, 0x80, # jmp $8005
])
rom = code + bytearray([0xea] * (32768 - len(code)))
rom[0x7ffc] = 0x00
rom[0x7ffd] = 0x80
with open("rom.bin", "wb") as out_file:
out_file.write(rom)
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