VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   2760
   LinkTopic       =   "Form1"
   ScaleHeight     =   213
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   184
   StartUpPosition =   2  'CenterScreen
   Begin VB.CommandButton TestButton 
      Caption         =   "Test"
      Height          =   495
      Left            =   120
      TabIndex        =   1
      Top             =   120
      Width           =   1215
   End
   Begin VB.ListBox DataList 
      Height          =   2985
      ItemData        =   "MainForm.frx":0000
      Left            =   1440
      List            =   "MainForm.frx":0002
      TabIndex        =   0
      Top             =   120
      Width           =   1215
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub TestButton_Click()
    Const HighSample = 1023
    Dim Error As Long
    Dim Buf(0 To HighSample) As Integer
    Dim I As Long
    Dim oFlags As Byte

    DataList.Clear
    For I = 0 To HighSample
        Buf(I) = &H4242
    Next
    oFlags = InPortB(&H61)
    OutPortB &H61, oFlags Or 3
    Error = INSW(&H40, HighSample + 1, Buf(0))
    OutPortB &H61, oFlags
    For I = 0 To HighSample
        DataList.AddItem I & ": " & Hex$(Buf(I))
    Next

    TestButton.Caption = "Error = " & Error
End Sub