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TODO: Keyboard layout.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // Family BASIC Keyboard | ||
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| import {Address, Byte} from "../types"; | ||
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| export interface Peripheral { | ||
| getIoMap(): Map<number, (adr: Address, value?: Byte) => any> | ||
| } | ||
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| export const enum KeyType { | ||
| F8, RETURN, LBRACKET, RBRACKET, KANA, RSHIFT, YEN, STOP, | ||
| F7, ATMARK, COLON, SEMICOLON, UNDERSCORE, SLASH, MINUS, HAT, | ||
| F6, O, L, K, PERIOD, COMMA, P, NUM0, | ||
| F5, I, U, J, M, N, NUM9, NUM8, | ||
| F4, Y, G, H, B, V, NUM7, NUM6, | ||
| F3, T, R, D, F, C, NUM5, NUM4, | ||
| F2, W, S, A, X, Z, E, NUM3, | ||
| F1, ESC, Q, CTR, LSHIFT, GRPH, NUM1, NUM2, | ||
| CLR_HOME, UP, RIGHT, LEFT, DOWN, SPACE, DEL, INS, | ||
| } | ||
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| export class Keyboard implements Peripheral { | ||
| private ioMap: Map<number, (adr: Address, value?: Byte) => any> | ||
| private state = new Uint8Array(10 * 2) | ||
| private rowcol = 0 | ||
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| constructor() { | ||
| this.state.fill(0x1e) | ||
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| this.ioMap = new Map<number, (adr: Address, value?: Byte) => any>() | ||
| this.ioMap.set(0x4016, (_adr: Address, value?: Byte) => { | ||
| const prevcol = this.rowcol & 1 | ||
| const col = (value! >> 1) & 1 | ||
| this.rowcol = (this.rowcol & ~1) | col | ||
| if (col === 0 && prevcol !== 0) // High to low. | ||
| this.rowcol = (this.rowcol + 2) % (10 * 2) | ||
| if ((value! & 1) !== 0) { | ||
| this.rowcol = 0 | ||
| } | ||
| }) | ||
| this.ioMap.set(0x4017, (_adr: Address) => { | ||
| const result = this.state[this.rowcol] | ||
| this.rowcol += 1 | ||
| return result | ||
| }) | ||
| } | ||
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| public getIoMap(): Map<number, (adr: number, value?: Byte) => any> { | ||
| return this.ioMap | ||
| } | ||
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| public setKeyState(type: KeyType, pressed: boolean): void { | ||
| const i = type >> 2 | ||
| const b = 2 << (type & 3) | ||
| const s = this.state[i] | ||
| this.state[i] = pressed ? (s & ~b) : (s | b) // Pressed=>clear, not pressed=>set | ||
| } | ||
| } |