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c64: use light pen registers w/ screen pointer

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This commit is contained in:
Steven Hugg 2022-08-24 20:12:45 -05:00
parent ba2644e7d0
commit 936608d6d5
1 changed files with 18 additions and 3 deletions
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21
src/machine/c64.ts
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@ -1,7 +1,7 @@
import { Probeable } from "../common/devices";
import { AcceptsPaddleInput, Probeable } from "../common/devices";
import { dumpRAM, KeyFlags } from "../common/emu";
import { hex, lpad } from "../common/util";
import { clamp, hex, lpad } from "../common/util";
// https://www.c64-wiki.com/wiki/C64
// http://www.zimmers.net/cbmpics/cbm/c64/vic-ii.txt
@ -15,7 +15,8 @@ import { Machine } from "../common/baseplatform";
import { TrapCondition } from "../common/devices";
import { BaseWASMMachine } from "../common/wasmplatform";
export class C64_WASMMachine extends BaseWASMMachine implements Machine, Probeable {
export class C64_WASMMachine extends BaseWASMMachine
implements Machine, Probeable, AcceptsPaddleInput {
numTotalScanlines = 312;
cpuCyclesPerLine = 63;
@ -23,6 +24,8 @@ export class C64_WASMMachine extends BaseWASMMachine implements Machine, Probeab
prgstart : number;
joymask0 = 0;
joymask1 = 0;
lightpen_x = 0;
lightpen_y = 0;
loadBIOS(srcArray: Uint8Array) {
var patch1ofs = 0xea24 - 0xe000 + 0x3000;
@ -253,4 +256,16 @@ export class C64_WASMMachine extends BaseWASMMachine implements Machine, Probeab
}
}
setPaddleInput(controller: number, value: number): void {
if (controller == 0) this.lightpen_x = value;
if (controller == 1) this.lightpen_y = value;
const x1 = 22;
const y1 = 36;
const x2 = 228;
const y2 = 220;
let x = clamp(0, 255, (this.lightpen_x - x1) / (x2 - x1) * 160 + 24);
let y = clamp(0, 255, (this.lightpen_y - y1) / (y2 - y1) * 200 + 50);
this.exports.machine_set_mouse(this.sys, x, y);
}
}