Merge pull request 'add almost full vfd implementation' (#31) from Haruka/segatools:vfd into develop

Reviewed-on: https://gitea.tendokyu.moe/Dniel97/segatools/pulls/31
Reviewed-by: Dniel97 <dniel97@noreply.gitea.tendokyu.moe>

board/config.c

@@ -90,4 +90,6 @@ void vfd_config_load(struct vfd_config *cfg, const wchar_t *filename)
     assert(filename != NULL);
 
     cfg->enable = GetPrivateProfileIntW(L"vfd", L"enable", 1, filename);
+    cfg->port = GetPrivateProfileIntW(L"vfd", L"portNo", 0, filename);
+    cfg->utf_conversion = GetPrivateProfileIntW(L"vfd", L"utfConversion", 0, filename);
 }

board/meson.build

@@ -47,5 +47,8 @@ board_lib = static_library(
         'slider-frame.h',
         'vfd.c',
         'vfd.h',
+        'vfd-cmd.h',
+        'vfd-frame.c',
+        'vfd-frame.h',
     ],
 )

board/vfd-cmd.h

@@ -0,0 +1,123 @@
+#pragma once
+
+#include "board/vfd-frame.h"
+
+enum {
+    VFD_CMD_GET_VERSION = 0x5B,
+    VFD_CMD_RESET = 0x0B,
+    VFD_CMD_CLEAR_SCREEN = 0x0C,
+    VFD_CMD_SET_BRIGHTNESS = 0x20,
+    VFD_CMD_SET_SCREEN_ON = 0x21,
+    VFD_CMD_SET_H_SCROLL = 0x22,
+    VFD_CMD_DRAW_IMAGE = 0x2E,
+    VFD_CMD_SET_CURSOR = 0x30,
+    VFD_CMD_SET_ENCODING = 0x32,
+    VFD_CMD_SET_TEXT_WND = 0x40,
+    VFD_CMD_SET_TEXT_SPEED = 0x41,
+    VFD_CMD_WRITE_TEXT = 0x50,
+    VFD_CMD_ENABLE_SCROLL = 0x51,
+    VFD_CMD_DISABLE_SCROLL = 0x52,
+    VFD_CMD_ROTATE = 0x5D,
+    VFD_CMD_CREATE_CHAR = 0xA3,
+    VFD_CMD_CREATE_CHAR2 = 0xA4,
+};
+
+enum {
+    VFD_ENC_GB2312    = 0,
+    VFD_ENC_BIG5      = 1,
+    VFD_ENC_SHIFT_JIS = 2,
+    VFD_ENC_KSC5601   = 3,
+    VFD_ENC_MAX = 3,
+};
+
+struct vfd_req_hdr {
+    uint8_t sync;
+    uint8_t cmd;
+};
+
+struct vfd_req_any {
+    struct vfd_req_hdr hdr;
+    uint8_t payload[2054];
+};
+
+struct vfd_req_board_info {
+    struct vfd_req_hdr hdr;
+    uint8_t unk1;
+};
+
+struct vfd_resp_board_info { // \x0201.20\x03
+    uint8_t unk1;
+    char version[5];
+    uint8_t unk2;
+};
+
+struct vfd_req_reset {
+    struct vfd_req_hdr hdr;
+};
+
+struct vfd_req_cls {
+    struct vfd_req_hdr hdr;
+};
+
+struct vfd_req_brightness {
+    struct vfd_req_hdr hdr;
+    uint8_t brightness;
+};
+
+struct vfd_req_power {
+    struct vfd_req_hdr hdr;
+    uint8_t power_state;
+};
+
+struct vfd_req_hscroll {
+    struct vfd_req_hdr hdr;
+    uint8_t x_pos;
+};
+
+struct vfd_req_draw {
+    struct vfd_req_hdr hdr;
+    uint16_t x0;
+    uint8_t y0;
+    uint16_t x1;
+    uint8_t y1;
+    uint8_t image[2048];
+};
+
+struct vfd_req_cursor {
+    struct vfd_req_hdr hdr;
+    uint16_t x;
+    uint8_t y;
+};
+
+struct vfd_req_encoding {
+    struct vfd_req_hdr hdr;
+    uint8_t encoding;
+};
+
+struct vfd_req_wnd {
+    struct vfd_req_hdr hdr;
+    uint16_t x0;
+    uint8_t y0;
+    uint16_t x1;
+    uint8_t y1;
+};
+
+struct vfd_req_speed {
+    struct vfd_req_hdr hdr;
+    uint8_t encoding;
+};
+
+struct vfd_req_scroll {
+    struct vfd_req_hdr hdr;
+};
+
+struct vfd_req_rotate {
+    struct vfd_req_hdr hdr;
+    uint8_t unk1;
+};
+
+struct vfd_req_create_char {
+    struct vfd_req_hdr hdr;
+    uint8_t type;
+    uint8_t pixels[32];
+};

board/vfd-frame.c

@@ -0,0 +1,88 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#define SUPER_VERBOSE 1
+
+#include "board/vfd-frame.h"
+
+#include "hook/iobuf.h"
+
+#include "util/dprintf.h"
+
+static HRESULT vfd_frame_encode_byte(struct iobuf *dest, uint8_t byte);
+
+/* Frame structure:
+
+    REQUEST:
+   [0] Sync byte (0x1A or 0x1B)
+   [1] Packet ID
+   [2...n-1] Data/payload
+
+   --- OR ---
+
+   if no sync byte is given, plain static text in the currently configured encoding is expected.
+
+   RESPONSE:
+   This thing never responds, unless it's VFD_CMD_GET_VERSION
+   */
+
+bool vfd_frame_sync(struct const_iobuf *src) {
+    return src->bytes[src->pos] == VFD_SYNC_BYTE || src->bytes[src->pos] == VFD_SYNC_BYTE2;
+}
+
+HRESULT vfd_frame_encode(
+        struct iobuf *dest,
+        const void *ptr,
+        size_t nbytes) {
+    const uint8_t *src;
+    uint8_t byte;
+    size_t i;
+    HRESULT hr;
+
+    assert(dest != NULL);
+    assert(dest->bytes != NULL || dest->nbytes == 0);
+    assert(dest->pos <= dest->nbytes);
+    assert(ptr != NULL);
+
+    src = ptr;
+
+    if (dest->pos >= dest->nbytes) {
+        return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
+    }
+
+#if SUPER_VERBOSE
+    dprintf("VFD: RX Buffer:\n");
+#endif
+
+    for (i = 1; i < nbytes; i++) {
+        byte = src[i];
+#if SUPER_VERBOSE
+        dprintf("%02x ", byte);
+#endif
+
+        hr = vfd_frame_encode_byte(dest, byte);
+
+        if (FAILED(hr)) {
+            return hr;
+        }
+    }
+#if SUPER_VERBOSE
+    dprintf("\n");
+#endif
+
+    return hr;
+}
+
+static HRESULT vfd_frame_encode_byte(struct iobuf *dest, uint8_t byte) {
+    if (dest->pos + 1 > dest->nbytes) {
+        return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
+    }
+
+    dest->bytes[dest->pos++] = byte;
+
+    return S_OK;
+}

board/vfd-frame.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <windows.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "hook/iobuf.h"
+
+enum {
+    VFD_SYNC_BYTE = 0x1B,
+    VFD_SYNC_BYTE2 = 0x1A,
+};
+
+bool vfd_frame_sync(struct const_iobuf *src);
+
+HRESULT vfd_frame_encode(
+        struct iobuf *dest,
+        const void *ptr,
+        size_t nbytes);

board/vfd.c

@@ -2,17 +2,16 @@
    directly by amdaemon, and it has something to do with displaying the status
    of electronic payments.
 
-   Part number in schematics is "VFD GP1232A02A FUTABA".
-
-   Little else about this board is known. Black-holing the RS232 comms that it
-   receives seems to be sufficient for the time being. */
+   Part number in schematics is "VFD GP1232A02A FUTABA". */
 
 #include <windows.h>
 
 #include <assert.h>
 #include <stdint.h>
 
+#include "board/config.h"
 #include "board/vfd.h"
+#include "board/vfd-cmd.h"
 
 #include "hook/iohook.h"
 
@@ -21,33 +20,101 @@
 #include "util/dprintf.h"
 #include "util/dump.h"
 
+#define SUPER_VERBOSE 0
+
 static HRESULT vfd_handle_irp(struct irp *irp);
 
 static struct uart vfd_uart;
-static uint8_t vfd_written[512];
-static uint8_t vfd_readable[512];
-UINT codepage;
+static uint8_t vfd_written[4096];
+static uint8_t vfd_readable[4096];
 
-HRESULT vfd_hook_init(const struct vfd_config *cfg, unsigned int port_no)
+static int encoding = VFD_ENC_SHIFT_JIS;
+
+HRESULT vfd_handle_get_version(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_reset(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_clear_screen(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_brightness(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_screen_on(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_h_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_draw_image(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_cursor(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_encoding(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_text_wnd(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_set_text_speed(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_write_text(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_enable_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_disable_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_rotate(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_create_char(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+HRESULT vfd_handle_create_char2(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart);
+
+static bool utf_enabled;
+
+HRESULT vfd_hook_init(struct vfd_config *cfg, int default_port)
 {
-    assert(cfg != NULL);
-
     if (!cfg->enable){
         return S_FALSE;
     }
 
-    uart_init(&vfd_uart, port_no);
+    utf_enabled = cfg->utf_conversion;
+
+    int port = cfg->port;
+    if (port == 0){
+        port = default_port;
+    }
+
+    dprintf("VFD: enabling (port=%d)\n", port);
+    uart_init(&vfd_uart, port);
     vfd_uart.written.bytes = vfd_written;
     vfd_uart.written.nbytes = sizeof(vfd_written);
     vfd_uart.readable.bytes = vfd_readable;
     vfd_uart.readable.nbytes = sizeof(vfd_readable);
 
-    codepage = GetACP();
-    dprintf("VFD: hook enabled.\n");
-
     return iohook_push_handler(vfd_handle_irp);
 }
 
+
+const char* get_encoding_name(int b){
+    switch (b){
+        case 0: return "gb2312";
+        case 1: return "big5";
+        case 2: return "shift-jis";
+        case 3: return "ks_c_5601-1987";
+        default: return "unknown";
+    }
+}
+
+void print_vfd_text(const char* str, int len){
+
+    if (utf_enabled){
+
+        wchar_t encoded[1024];
+        memset(encoded, 0, 1024 * sizeof(wchar_t));
+
+        int codepage = 0;
+        if (encoding == VFD_ENC_GB2312){
+            codepage = 936;
+        } else if (encoding == VFD_ENC_BIG5){
+            codepage = 950;
+        } else if (encoding == VFD_ENC_SHIFT_JIS){
+            codepage = 932;
+        } else if (encoding == VFD_ENC_KSC5601) {
+            codepage = 949;
+        }
+
+        if (!MultiByteToWideChar(codepage, MB_USEGLYPHCHARS, str, len, encoded, 1024)){
+            dprintf("VFD: Text conversion failed: %ld", GetLastError());
+            return;
+        }
+
+        dprintf("VFD: Text: %ls\n", encoded);
+    } else {
+
+        dprintf("VFD: Text: %s\n", str);
+
+    }
+}
+
 static HRESULT vfd_handle_irp(struct irp *irp)
 {
     HRESULT hr;
@@ -58,67 +125,274 @@ static HRESULT vfd_handle_irp(struct irp *irp)
         return iohook_invoke_next(irp);
     }
 
+    if (irp->op == IRP_OP_OPEN){
+        dprintf("VFD: Open\n");
+    } else if (irp->op == IRP_OP_CLOSE){
+        dprintf("VFD: Close\n");
+    }
+
     hr = uart_handle_irp(&vfd_uart, irp);
 
     if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
         return hr;
     }
 
-    uint8_t cmd = 0;
-    uint8_t str_1[512];
-    uint8_t str_2[512];
-    uint8_t str_1_len = 0;
-    uint8_t str_2_len = 0;
-    for (size_t i = 0; i < vfd_uart.written.pos; i++) {
-        if (vfd_uart.written.bytes[i] == 0x1B) {
-            i++;
-            cmd = vfd_uart.written.bytes[i];
-            if (cmd == 0x30) {
-                i += 3;
-            }
-            else if (cmd == 0x50) {
-                i++;
-            }
-            continue;
-        }
-        if (cmd == 0x30) {
-            str_1[str_1_len++] = vfd_uart.written.bytes[i];
-        }
-        else if (cmd == 0x50) {
-            str_2[str_2_len++] = vfd_uart.written.bytes[i];
-        }
-    }
+#if SUPER_VERBOSE
+    dprintf("VFD TX:\n");
+    dump_iobuf(&vfd_uart.written);
+#endif
 
-    if (str_1_len) {
-        str_1[str_1_len++] = '\0';
-        if (codepage != 932) {
-            WCHAR buffer[512];
-            MultiByteToWideChar(932, 0, (LPCSTR)str_1, str_1_len, buffer, str_1_len);
-            char str_recode[str_1_len * 3];
-            WideCharToMultiByte(codepage, 0, buffer, str_1_len, str_recode, str_1_len * 3, NULL, NULL);
-            dprintf("VFD: %s\n", str_recode);
-        }
-        else {
-            dprintf("VFD: %s\n", str_1);
-        }
-    }
+    struct const_iobuf reader;
+    iobuf_flip(&reader, &vfd_uart.written);
 
-    if (str_2_len) {
-        str_2[str_2_len++] = '\0';
-        if (codepage != 932) {
-            WCHAR buffer[512];
-            MultiByteToWideChar(932, 0, (LPCSTR)str_2, str_2_len, buffer, str_2_len);
-            char str_recode[str_2_len * 3];
-            WideCharToMultiByte(codepage, 0, buffer, str_2_len, str_recode, str_2_len * 3, NULL, NULL);
-            dprintf("VFD: %s\n", str_recode);
+    struct iobuf* writer = &vfd_uart.readable;
+    for (; reader.pos < reader.nbytes ; ){
+
+        if (vfd_frame_sync(&reader)) {
+
+            reader.pos++; // get the sync byte out of the way
+
+            uint8_t cmd;
+            iobuf_read_8(&reader, &cmd);
+
+            if (cmd == VFD_CMD_GET_VERSION) {
+                hr = vfd_handle_get_version(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_RESET) {
+                hr = vfd_handle_reset(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_CLEAR_SCREEN) {
+                hr = vfd_handle_clear_screen(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_BRIGHTNESS) {
+                hr = vfd_handle_set_brightness(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_SCREEN_ON) {
+                hr = vfd_handle_set_screen_on(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_H_SCROLL) {
+                hr = vfd_handle_set_h_scroll(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_DRAW_IMAGE) {
+                hr = vfd_handle_draw_image(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_CURSOR) {
+                hr = vfd_handle_set_cursor(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_ENCODING) {
+                hr = vfd_handle_set_encoding(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_TEXT_WND) {
+                hr = vfd_handle_set_text_wnd(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_SET_TEXT_SPEED) {
+                hr = vfd_handle_set_text_speed(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_WRITE_TEXT) {
+                hr = vfd_handle_write_text(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_ENABLE_SCROLL) {
+                hr = vfd_handle_enable_scroll(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_DISABLE_SCROLL) {
+                hr = vfd_handle_disable_scroll(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_ROTATE) {
+                hr = vfd_handle_rotate(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_CREATE_CHAR) {
+                hr = vfd_handle_create_char(&reader, writer, &vfd_uart);
+            } else if (cmd == VFD_CMD_CREATE_CHAR2) {
+                hr = vfd_handle_create_char2(&reader, writer, &vfd_uart);
             } else {
-            dprintf("VFD: %s\n", str_2);
+                dprintf("VFD: Unknown command 0x%x\n", cmd);
+                dump_const_iobuf(&reader);
+                hr = S_FALSE;
             }
+        } else {
+
+            // if no sync byte is sent, we are just getting plain text...
+
+            if (reader.pos < reader.nbytes){
+                int len = 0;
+
+                // read chars until we hit a new sync byte or the data ends
+                while (reader.pos + len + 1 < reader.nbytes && reader.bytes[reader.pos + len] != VFD_SYNC_BYTE && reader.bytes[reader.pos + len] != VFD_SYNC_BYTE2){
+                    len++;
+                }
+
+                char* str = malloc(len);
+                memset(str, 0, len);
+                iobuf_read(&reader, str, len);
+                print_vfd_text(str, len);
+                free(str);
+
+                reader.pos += len;
+            }
+
+        }
+
+        if (!SUCCEEDED(hr)){
+            return hr;
+        }
+
     }
 
-    // dprintf("VFD TX:\n");
-    // dump_iobuf(&vfd_uart.written);
     vfd_uart.written.pos = 0;
 
     return hr;
 }
+
+HRESULT vfd_handle_get_version(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    dprintf("VFD: Get Version\n");
+
+    struct vfd_resp_board_info resp;
+
+    memset(&resp, 0, sizeof(resp));
+    resp.unk1 = 2;
+    strcpy(resp.version, "01.20");
+    resp.unk2 = 1;
+
+    return vfd_frame_encode(writer, &resp, sizeof(resp));
+}
+HRESULT vfd_handle_reset(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    dprintf("VFD: Reset\n");
+
+    encoding = VFD_ENC_SHIFT_JIS;
+
+    return S_FALSE;
+}
+HRESULT vfd_handle_clear_screen(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    dprintf("VFD: Clear Screen\n");
+
+    return S_FALSE;
+}
+HRESULT vfd_handle_set_brightness(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+
+    if (b > 4){
+        dprintf("VFD: Brightness, invalid argument\n");
+        return E_FAIL;
+    }
+
+    dprintf("VFD: Brightness, %d\n", b);
+
+    return S_FALSE;
+}
+HRESULT vfd_handle_set_screen_on(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+
+    if (b > 1){
+        dprintf("VFD: Screen Power, invalid argument\n");
+        return E_FAIL;
+    }
+
+    dprintf("VFD: Screen Power, %d\n", b);
+    return S_FALSE;
+}
+HRESULT vfd_handle_set_h_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t x;
+    iobuf_read_8(reader, &x);
+
+    dprintf("VFD: Horizontal Scroll, X=%d\n", x);
+    return S_FALSE;
+}
+HRESULT vfd_handle_draw_image(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    int w, h;
+    uint16_t x0, x1;
+    uint8_t y0, y1;
+    uint8_t image[2048];
+
+    iobuf_read_be16(reader, &x0);
+    iobuf_read_8(reader, &y0);
+    iobuf_read_be16(reader, &x1);
+    iobuf_read_8(reader, &y1);
+    w = x1 - x0;
+    h = y1 - y0;
+    iobuf_read(reader, image, w*h);
+
+    dprintf("VFD: Draw image, %dx%d\n", w, h);
+    return S_FALSE;
+}
+
+HRESULT vfd_handle_set_cursor(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint16_t x;
+    uint8_t y;
+
+    iobuf_read_be16(reader, &x);
+    iobuf_read_8(reader, &y);
+
+    dprintf("VFD: Set Cursor, x=%d,y=%d\n", x, y);
+
+    return S_FALSE;
+}
+
+HRESULT vfd_handle_set_encoding(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+
+    dprintf("VFD: Set Encoding, %d (%s)\n", b, get_encoding_name(b));
+
+    if (b < 0 || b > VFD_ENC_MAX){
+        dprintf("Invalid encoding specified\n");
+        return E_FAIL;
+    }
+
+    encoding = b;
+
+    return S_FALSE;
+}
+HRESULT vfd_handle_set_text_wnd(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint16_t x0, x1;
+    uint8_t y0, y1;
+
+    iobuf_read_be16(reader, &x0);
+    iobuf_read_8(reader, &y0);
+    iobuf_read_be16(reader, &x1);
+    iobuf_read_8(reader, &y1);
+
+    dprintf("VFD: Set Text Window, p0:%d,%d, p1:%d,%d\n", x0, y0, x1, y1);
+    return S_FALSE;
+}
+HRESULT vfd_handle_set_text_speed(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+
+    dprintf("VFD: Set Text Speed, %d\n", b);
+    return S_FALSE;
+}
+HRESULT vfd_handle_write_text(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t len;
+    iobuf_read_8(reader, &len);
+
+    char* str = malloc(len);
+    iobuf_read(reader, str, len);
+
+    print_vfd_text(str, len);
+    free(str);
+
+    return S_FALSE;
+}
+HRESULT vfd_handle_enable_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    dprintf("VFD: Enable Scrolling\n");
+    return S_FALSE;
+}
+HRESULT vfd_handle_disable_scroll(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    dprintf("VFD: Disable Scrolling\n");
+    return S_FALSE;
+}
+HRESULT vfd_handle_rotate(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+
+    dprintf("VFD: Rotate, %d\n", b);
+    return S_FALSE;
+}
+HRESULT vfd_handle_create_char(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b;
+    iobuf_read_8(reader, &b);
+    char buf[32];
+
+    iobuf_read(reader, buf, 32);
+
+    dprintf("VFD: Create character, %d\n", b);
+    return S_FALSE;
+}
+HRESULT vfd_handle_create_char2(struct const_iobuf* reader, struct iobuf* writer, struct uart* vfd_uart){
+    uint8_t b, b2;
+    iobuf_read_8(reader, &b);
+    iobuf_read_8(reader, &b2);
+    char buf[16];
+
+    iobuf_read(reader, buf, 16);
+
+    dprintf("VFD: Create character, %d, %d\n", b, b2);
+    return S_FALSE;
+}

board/vfd.h

@@ -4,7 +4,10 @@
 
 struct vfd_config {
     bool enable;
+    int port;
+    bool utf_conversion;
 };
 
 
-HRESULT vfd_hook_init(const struct vfd_config *cfg, unsigned int port_no);
+HRESULT vfd_hook_init(struct vfd_config *cfg, int default_port);
+

dist/chusan/segatools.ini

@@ -25,7 +25,7 @@ aimePath=DEVICE\aime.txt
 ;highBaud=1
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/cm/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/fgo/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/mai2/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/mercury/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/mu3/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

dist/swdc/segatools.ini

@@ -23,7 +23,7 @@ enable=1
 aimePath=DEVICE\aime.txt
 
 [vfd]
-; Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+; Enable VFD emulation. Disable to use a real VFD
 ; GP1232A02A FUTABA assembly.
 enable=1
 

doc/config/common.md

@@ -92,9 +92,21 @@ Controls emulation of the VFD GP1232A02A FUTABA assembly.
 
 Default: `1`
 
-Enable VFD emulation (currently just stubbed). Disable to use a real VFD
+Enable VFD emulation. Disable to use a real VFD
 GP1232A02A FUTABA assembly (COM port number varies by game).
 
+### `portNo`
+
+Default: (game specific)
+
+Sets the COM port to use for the VFD.
+
+### `utfConversion`
+
+Default: `0`
+
+Converts the strings from the VFD from their respective encoding to UTF, so console output will display as it should on non-Japanese locales.
+
 ## `[amvideo]`
 
 Controls the `amvideo.dll` stub built into Segatools. This is a DLL that is