Search Posts:

Archiving Wafers to WAV

View Entire Thread

Return to Threads

SHARE
  by Bill Degnan - 07/02/2009 23:05
Here is a set of useful tips by Terry Stewart in New Zealand. His web site is

http://www.classic-computers.org.nz

-------------------
reprint from TRS-80 YahooGroups
-------------------
Question:
Is there any chance that these are actually some rare form of audio tape that we could record a WAV file of? There's no such thing as a wafer2dmk or wafer2cas or something, is there?

Answer
Do you have a working ESF and TRS-80?

If so, it very doable. Matthew Reed's emulator can load in WAV files as cassette input. I've found it quite reliable. Here's what I would do. This is assuming a PC Windows environment

1. Connect the TRS-80 up to the Line Input socket of your soundcard in the PC. Load a sound editor like Audacity (it's free for download) into the PC and have it standing by.

For BASIC Programs...

2a. When ready load in a ESF program from wafer
3a CSAVE the program out, capturing it in Audacity as a WAV file.
4a Test to see if the WAV loads into Matthew Reed's emulator. If it does, re-write it as a CAS or ESF image file for archiving. Alternatively you could keep the original WAV but they are much larger of course.

FOR a machine language program.

2b. Find out the start, length and entry address by loading the program in the ESF holding the shift key down. Chances are it will load somewhere between 4300 and 7FFF
3b If you have ESF-80, you can write the memory segment straight out to the soundcard as above. An alternative is to load a monitor like TASMON in from tape, You have to watch you don't overwrite the program though. If you have 48k (non-disk) and a monitor program that sits right at the top of memory, that is ideal. Nearly all ESF programs occupy the first 16k and some large ones occupy most of it.
4b. Once written out as a WAV, you could load it into Matthew's emulator using the system command, You can then @save to program directly to a virtual wafer for archiving (or WAV or CAS).

The ESF can co-exist with disk so disk monitor programs can be used. The problem is m/l ESF programs may be in the area from 4300 to 5200 where DOS resides.

Hope this helps. I have a high memory version of TASMON as a WAV file I could throw on an FTP server if that is any help. Any cassette programs I use with my real TRS80 I load as a WAV from the PC through the soundcard using Audacity. Works just fine!

Terry

Reply

Resources:


Buy a Commodore Computer Poster

Popular Topics and FAQs


  • Commodore B Series Tips and Tricks
  • Aerocomp TRS 80 M 1 Expansion Unit DDC
  • Items Wanted
  • Lobo Max 80
  • Zenith Z-19-CN
  • Prototype PET 2001 photo
  • Using Toggle Switches to Analyze Memory
  • Commodore Disk Archive Project
  • PET 2001 Prototype at Gametronics 1977
  • Jim Butterfield Photo
  • IMSAI 8080 With Processor Tech. Cutter
  • Secrecy is the keystone of all tyranny
  • Cromemco System Three
  • Northstar Horizon - Boot Problem
  • Computer History and Restoration Links
  • Commodore BX-256-80 - 8088 Co-processor
  • S-100 board testing with Z-80 ICE
  • Donner 3500 - an early portable computer
  • Digital (DEC) PDP 11/05 NC Assembly
  • Univac 1219 rescue
  • IMSAI 1.4 BASIC vs. MITS 8K BASIC
  • Fido BBS listing node list 6-13-1986
  • PDP 8e
  • MITS 88-2 SIO (2SIO) for BASIC
  • Visual Technology Inc Model 1050
  • Amiga 2500 Restoration
  • The Evolution Of IBM Computers
  • Replacement teletype print hammer head
  • Archiving and Copying Software 101
  • Computers Built 1940 - 1950
  • CBM B-520 (a.k.a B256-80 or B500 256)
  • RCA COSMAC Microkit
  • Commodore 64K C-116 Mods
  • MITS 8800b Turnmon 9600 baud
  • Catweasel, 8in and 5 1/4
  • Raspberry Pi as Gateway to Internet
  • Digital PDP11 late 1969 early 1970
  • PDP 11/40 72 inch cabinet model
  • PDP 11/40 Industrial 11 model
  • Digitial MicroVAX 3100 30 System
  • Digital VAX 4000-200
  • Commodore 64 / 1541 DRIVEKNOCK
  • Booting the System Using RL02 drive
  • PACS: Reflections by Kathleen Mauchly
  • Tele-Graphic Computer Systems Inc.
  • Commodore B Series SID Jukebox?
  • Installing Core into PDP 11/40
  • Setting Up OpenVMS 7.1 DNS CLERK
  • Felt-Tarrant Comptometer Model J
  • NextStation Color
  • Digital Rainbow (PC100-B2)
  • 1970 Compusad Compulogical Tutor
  • Archiving Papertapes Using DSI NC 2400
  • 1976 P.C.C. Features the MAI JOLT 6502
  • 1961 Beckman DEXTIR Computer
  • UNIVAC 1 and UNIVAC File Computer 1
  • Past Issues:


    DEXTIR 1961 ESSO

    This image was selected at random from the archive. Click image for more photos and files from this set.