Add language card

js/components/Apple2.tsx

@@ -7,6 +7,7 @@ import { Debugger } from './Debugger';
 import { ErrorModal } from './ErrorModal';
 import { Inset } from './Inset';
 import { Keyboard } from './Keyboard';
+import { LanguageCard } from './LanguageCard';
 import { Mouse } from './Mouse';
 import { Screen } from './Screen';
 import { Drives } from './Drives';
@@ -56,6 +57,7 @@ export const Apple2 = (props: Apple2Props) => {
     const io = apple2?.getIO();
     const cpu = apple2?.getCPU();
     const vm = apple2?.getVideoModes();
+    const rom = apple2?.getROM();
 
     const doPaste = useCallback((event: Event) => {
         if (io) {
@@ -135,6 +137,7 @@ export const Apple2 = (props: Apple2Props) => {
                 onClick={removeFocus}
             >
                 <Screen screen={screen} />
+                {!e ? <LanguageCard cpu={cpu} io={io} rom={rom} slot={0} /> : null}
                 <Slinky io={io} slot={2} />
                 {!e ? <Videoterm io={io} slot={3} /> : null}
                 <Mouse cpu={cpu} screen={screen} io={io} slot={4} />

js/components/LanguageCard.tsx

@@ -0,0 +1,35 @@
+import CPU6502 from 'js/cpu6502';
+import { Memory } from 'js/types';
+import { useEffect } from 'preact/hooks';
+import Apple2IO, { slot } from '../apple2io';
+import LanguageCardImpl from '../cards/langcard';
+
+/**
+ * Language Card component properties
+ */
+export interface LanguageCardProps {
+    io: Apple2IO | undefined;
+    cpu: CPU6502 | undefined;
+    rom: Memory | undefined;
+    slot: slot;
+}
+
+/**
+ * Language card component. Adds 16KB of memory.
+ *
+ * @param cpu 6502 object
+ * @param io Apple2IO object
+ * @param slot Slot to register card in
+ * @returns LanguageCard component
+ */
+export const LanguageCard = ({ cpu, io, rom, slot }: LanguageCardProps) => {
+    useEffect(() => {
+        if (io && cpu && rom) {
+            const lc = new LanguageCardImpl(rom);
+            io.setSlot(slot, lc);
+            cpu.addPageHandler(lc);
+        }
+    }, [io, cpu, rom, slot]);
+
+    return null;
+};