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A couple more CPU regs

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This commit is contained in:
TQ Hirsch
2023-09-16 18:19:41 +02:00
parent 9d2397d809
commit 4c4be0aa40
6 changed files with 343 additions and 8 deletions
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2
build.gradle.kts
View File

@@ -19,6 +19,8 @@ dependencies {
implementation("info.picocli:picocli:4.7.5")
implementation("org.jline:jline-terminal:3.23.0")
implementation("org.jline:jline-terminal-jansi:3.23.0")
implementation("ch.qos.logback:logback-classic:1.4.11")
// implementation("org.slf4j:slf4j-api")
}

252
flake.lock generated Normal file
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@@ -0,0 +1,252 @@
{
"nodes": {
"devenv": {
"inputs": {
"flake-compat": "flake-compat",
"nix": "nix",
"nixpkgs": "nixpkgs",
"pre-commit-hooks": "pre-commit-hooks"
},
"locked": {
"lastModified": 1692700763,
"narHash": "sha256-pWbQEVSjlDfrrBoHv5XFe+IdYVpJXY8C9Wz7rO98yqU=",
"owner": "cachix",
"repo": "devenv",
"rev": "6b84a85dd5cde41cbf992b6b2445bf25fe0abb21",
"type": "github"
},
"original": {
"owner": "cachix",
"repo": "devenv",
"type": "github"
}
},
"flake-compat": {
"flake": false,
"locked": {
"lastModified": 1673956053,
"narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
"owner": "edolstra",
"repo": "flake-compat",
"rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
"type": "github"
},
"original": {
"owner": "edolstra",
"repo": "flake-compat",
"type": "github"
}
},
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1685518550,
"narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"gitignore": {
"inputs": {
"nixpkgs": [
"devenv",
"pre-commit-hooks",
"nixpkgs"
]
},
"locked": {
"lastModified": 1660459072,
"narHash": "sha256-8DFJjXG8zqoONA1vXtgeKXy68KdJL5UaXR8NtVMUbx8=",
"owner": "hercules-ci",
"repo": "gitignore.nix",
"rev": "a20de23b925fd8264fd7fad6454652e142fd7f73",
"type": "github"
},
"original": {
"owner": "hercules-ci",
"repo": "gitignore.nix",
"type": "github"
}
},
"lowdown-src": {
"flake": false,
"locked": {
"lastModified": 1633514407,
"narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
"owner": "kristapsdz",
"repo": "lowdown",
"rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
"type": "github"
},
"original": {
"owner": "kristapsdz",
"repo": "lowdown",
"type": "github"
}
},
"nix": {
"inputs": {
"lowdown-src": "lowdown-src",
"nixpkgs": [
"devenv",
"nixpkgs"
],
"nixpkgs-regression": "nixpkgs-regression"
},
"locked": {
"lastModified": 1676545802,
"narHash": "sha256-EK4rZ+Hd5hsvXnzSzk2ikhStJnD63odF7SzsQ8CuSPU=",
"owner": "domenkozar",
"repo": "nix",
"rev": "7c91803598ffbcfe4a55c44ac6d49b2cf07a527f",
"type": "github"
},
"original": {
"owner": "domenkozar",
"ref": "relaxed-flakes",
"repo": "nix",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1678875422,
"narHash": "sha256-T3o6NcQPwXjxJMn2shz86Chch4ljXgZn746c2caGxd8=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "126f49a01de5b7e35a43fd43f891ecf6d3a51459",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs-regression": {
"locked": {
"lastModified": 1643052045,
"narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
},
"original": {
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
}
},
"nixpkgs-stable": {
"locked": {
"lastModified": 1685801374,
"narHash": "sha256-otaSUoFEMM+LjBI1XL/xGB5ao6IwnZOXc47qhIgJe8U=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "c37ca420157f4abc31e26f436c1145f8951ff373",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-23.05",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1692794066,
"narHash": "sha256-H0aG8r16dj0x/Wz6wQhQxc9V7AsObOiHPaKxQgH6Y08=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "fc944919f743bb22379dddf18dcb72db6cff84aa",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-23.05",
"repo": "nixpkgs",
"type": "github"
}
},
"pre-commit-hooks": {
"inputs": {
"flake-compat": [
"devenv",
"flake-compat"
],
"flake-utils": "flake-utils",
"gitignore": "gitignore",
"nixpkgs": [
"devenv",
"nixpkgs"
],
"nixpkgs-stable": "nixpkgs-stable"
},
"locked": {
"lastModified": 1688056373,
"narHash": "sha256-2+SDlNRTKsgo3LBRiMUcoEUb6sDViRNQhzJquZ4koOI=",
"owner": "cachix",
"repo": "pre-commit-hooks.nix",
"rev": "5843cf069272d92b60c3ed9e55b7a8989c01d4c7",
"type": "github"
},
"original": {
"owner": "cachix",
"repo": "pre-commit-hooks.nix",
"type": "github"
}
},
"root": {
"inputs": {
"devenv": "devenv",
"nixpkgs": "nixpkgs_2",
"systems": "systems_2"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

41
flake.nix Normal file
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@@ -0,0 +1,41 @@
{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
systems.url = "github:nix-systems/default";
devenv.url = "github:cachix/devenv";
};
nixConfig = {
extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
extra-substituters = "https://devenv.cachix.org";
};
outputs = { self, nixpkgs, devenv, systems, ... } @ inputs:
let
forEachSystem = nixpkgs.lib.genAttrs (import systems);
in
{
devShells = forEachSystem
(system:
let
pkgs = nixpkgs.legacyPackages.${system};
in
{
default = devenv.lib.mkShell {
inherit inputs pkgs;
modules = [
{
# https://devenv.sh/reference/options/
packages = [ pkgs.hello ];
languages.java.enable = true;
languages.java.gradle.enable = true;
enterShell = ''
hello
'';
}
];
};
});
};
}

7
src/main/kotlin/Main.kt
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@@ -18,8 +18,13 @@ fun main(args: Array<String>) {
cpu.loadAbs(File(args[0]))
cpu.runState = CPU.RunState.RUNNING
cpu.pc = 0x80u
cpu.run()
val start = System.nanoTime()
val ninsn = cpu.run()
val end = System.nanoTime()
System.err.println("Halted at 0${cpu.pc.toString(8)}")
val time = (end-start).toDouble() / 1_000_000_000.0
println("Executed ${ninsn} in ${time}s: ${ninsn/time} i/s")
} finally {
println("Exiting")
console.stop()

40
src/main/kotlin/com/thequux/mcpdp/core/CPU.kt
View File

@@ -93,6 +93,21 @@ class CPU(val mbus: MemBus) {
set(value) {
psw = (psw and 0xFFFu) or (value and 0xFu)
}
private var pirq: UShort = 0u
set(value) {
val bitset = pirq shr 8
var maxp: UShort = 0u
for (i in 7 downTo 1) {
if (bitset bit i) {
maxp = i.toUShort() shl 1
break
}
}
field = value and 0xFE00u or maxp or (maxp shl 4)
}
private var cpu_err: UShort = 0u
set(value) { field = value and 0xFCu }
private var N: Boolean = false
private var C: Boolean = false
@@ -757,12 +772,15 @@ class CPU(val mbus: MemBus) {
}
fun step() {
try {
if (runState == RunState.HALTED) return
// TODO: handle PIRQ
for (i in (psw_priority + 1..<7).reversed()) {
for (i in 7 downTo (psw_priority + 1)) {
if (pirq bit 8+i) {
trap(0xA0u)
break
}
val source = mbus.unibus.checkInterrupt(i)
if (source != null) {
// we might have been waiting for an interrupt
@@ -784,10 +802,13 @@ class CPU(val mbus: MemBus) {
}
}
fun run() {
fun run(): Long {
var ninsn: Long = 0
while (runState == RunState.RUNNING) {
ninsn++
step()
}
return ninsn
}
fun trap(vector: UShort) {
@@ -799,14 +820,25 @@ class CPU(val mbus: MemBus) {
private inner class Registers: PAddressSpace {
override fun getw(addr: UInt): UShort = when (addr) {
0x3FFF0u -> (mbus.size shr 6).toUShort()
0x3FFF2u -> 0u // upper size
0x3FFF4u -> 0x1170u // system ID
0x3FFF6u -> cpu_err
0x3FFFAu -> pirq // PIRQ
0x3FFFCu -> 0x0u // stack limit
0x3FFFEu -> psw
else -> throw BusTimeoutError(addr)
}
override fun setw(addr: UInt, value: UShort) = when (addr) {
0x3_FFF0u , 0x3_FFF2u , 0x3_FFF4u, 0x3_FFF8u -> {} // read-only registers
0x3_FFF6u -> cpu_err = value
0x3_FFFAu -> pirq = value
0x3_FFFCu -> {} // stack limit
0x3_FFFEu -> psw = value
else -> {
println("Bus error at ${addr.toString(16)}")
println("Bus error at ${addr.toString(16)}: ${value.toString(16)}")
throw BusTimeoutError(addr)
}
}

3
src/main/kotlin/com/thequux/mcpdp/peripheral/DL11.kt
View File

@@ -10,6 +10,7 @@ import com.thequux.mcpdp.ext.bit.bit
import com.thequux.mcpdp.ext.bit.maskSet
import java.io.InputStream
import java.io.OutputStream
import java.io.InterruptedIOException
import java.util.concurrent.Semaphore
import java.util.concurrent.locks.Lock
import java.util.concurrent.locks.LockSupport
@@ -110,6 +111,8 @@ class DL11(private var istr: InputStream, private val ostr: OutputStream, val re
break
}
}
} catch (_: InterruptedIOException) {
// Nothing to do; time to shut down
} catch (_: InterruptedException) {
// Nothing to do; time to shut down
}