start of RP06

CMakeLists.txt

@@ -50,6 +50,7 @@ add_executable(
   mmu.cpp
   rk05.cpp
   rl02.cpp
+  rp06.cpp
   terminal.cpp
   tm-11.cpp
   tty.cpp
@@ -101,6 +102,7 @@ add_executable(
   mmu.cpp
   rk05.cpp
   rl02.cpp
+  rp06.cpp
   tm-11.cpp
   tty.cpp
   utils.cpp

rp06.cpp

@@ -0,0 +1,110 @@
+// (C) 2024 by Folkert van Heusden
+// Released under MIT license
+
+#include <errno.h>
+#include <string.h>
+
+#include "bus.h"
+#include "cpu.h"
+#include "error.h"
+#include "gen.h"
+#include "log.h"
+#include "rp06.h"
+#include "utils.h"
+
+
+const char *regnames[] { "Control", "Status", "Error register 1", "Maintenance", "Attention summary", "Desired sector/track address", "Look ahead", "Drive type", "Serial no", "Offset", "Desired cylinder address", "Current cylinder address", "Error register 2", "Error register 3", "ECC position", "ECC pattern" };
+
+rp06::rp06(bus *const b, std::atomic_bool *const disk_read_activity, std::atomic_bool *const disk_write_activity) :
+	b(b),
+	disk_read_activity (disk_read_activity ),
+	disk_write_activity(disk_write_activity)
+{
+}
+
+rp06::~rp06()
+{
+}
+
+void rp06::begin()
+{
+	reset();
+}
+
+void rp06::reset()
+{
+}
+
+void rp06::show_state(console *const cnsl) const
+{
+}
+
+JsonDocument rp06::serialize() const
+{
+	JsonDocument j;
+
+	return j;
+}
+
+rp06 *rp06::deserialize(const JsonVariantConst j, bus *const b)
+{
+	rp06 *r = new rp06(b, nullptr, nullptr);
+	r->begin();
+
+	return r;
+}
+
+uint8_t rp06::read_byte(const uint16_t addr)
+{
+	uint16_t v = read_word(addr & ~1);
+
+	if (addr & 1)
+		return v >> 8;
+
+	return v;
+}
+
+uint16_t rp06::read_word(const uint16_t addr)
+{
+	const int reg = (addr - RP06_BASE) / 2;
+
+	uint16_t value = 0;
+
+
+	TRACE("RP06: read \"%s\"/%o: %06o", regnames[reg], addr, value);
+
+	return value;
+}
+
+void rp06::write_byte(const uint16_t addr, const uint8_t v)
+{
+	uint16_t vtemp = registers[(addr - RP06_BASE) / 2];
+
+	if (addr & 1) {
+		vtemp &= ~0xff00;
+		vtemp |= v << 8;
+	}
+	else {
+		vtemp &= ~0x00ff;
+		vtemp |= v;
+	}
+
+	write_word(addr, vtemp);
+}
+
+void rp06::write_word(const uint16_t addr, uint16_t v)
+{
+	const int reg = (addr - RP06_BASE) / 2;
+
+	TRACE("RP06: write \"%s\"/%06o: %06o", regnames[reg], addr, v);
+
+        registers[reg] = v;
+
+	if (reg == RP06_CR) {
+		if (v & 1) {
+			int function_code = (v >> 1) & 31;
+
+
+		}
+	}
+}

rp06.h

@@ -0,0 +1,52 @@
+// (C) 2024 by Folkert van Heusden
+// Released under MIT license
+
+#pragma once
+
+#include "gen.h"
+#include <ArduinoJson.h>
+#include <atomic>
+#include <stdint.h>
+#include <stdio.h>
+#include <string>
+#include <vector>
+
+#include "disk_device.h"
+#include "disk_backend.h"
+
+
+#define RP06_CR 0176700  // control register
+#define RP06_BASE  RP06_CSR
+#define RP06_END  (RP06_MPR + 2)
+
+
+class bus;
+
+class rp06: public disk_device
+{
+private:
+	bus      *const b;
+
+	uint16_t registers[20] { };
+
+	std::atomic_bool *const disk_read_activity  { nullptr };
+	std::atomic_bool *const disk_write_activity { nullptr };
+
+public:
+	rp06(bus *const b, std::atomic_bool *const disk_read_activity, std::atomic_bool *const disk_write_activity);
+	virtual ~rp06();
+
+	void begin() override;
+	void reset() override;
+
+	void show_state(console *const cnsl) const override;
+
+	JsonDocument serialize() const;
+	static rp06 *deserialize(const JsonVariantConst j, bus *const b);
+
+	uint8_t  read_byte(const uint16_t addr) override;
+	uint16_t read_word(const uint16_t addr) override;
+
+	void write_byte(const uint16_t addr, const uint8_t  v) override;
+	void write_word(const uint16_t addr, const uint16_t v) override;
+};