Toinet wrote:
On 15 ao�t, 22:25, Ralph <rwh...@gmail.com> wrote:On Aug 13, 5:17 pm, Toinet <antoine.vig...@laposte.net> wrote:On 13 ao�t, 22:29, Ralph wrote:I'm looking for information on the keyboard interface for the Passport SoundChaser keyboard..... All I need is the Apple 2 interface card, which has only 5 chips onboard.There has been a recent auction on eBay which included a detailed picture of the interface card, try to get it, it may help you,Could you post the auction ID? The only detailed photo I've seen so far from a recent auction is for the Passport MIDI interface. (Auction ID 260642281880. - ended Aug 4th) Unfortunately, that's a 6840/6850-based card, which was developed after the Soundchaser keyboard. MIDI cards have those round DIN connectors on them, while the Soundchaser interface used a 16-pin DIP for the interface cable. So it's not MIDI- compatible. I suspect that the 16-pin DIP is enough for a matrix-encoded keyboard.
You are correct.
There are different interfaces in the pre-MIDI gear from Passport / AlphaSyntauri. The Syntauri line used a DB-25 connector on the back of the keyboard, and what looks like a dual-row header pin confguration on the Apple // card. The Soundchaser card uses a 16-pin DIP connector, and is a pale green two-layer card, with 5 7400-series TTL size chips onboard, based on what I see in these photos: http://www.mozomedia.com/apple2/media/sound_cards.jpg http://www.applefritter.com/node/137Sure, there it is: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110563738857 Why didn't I purchase it instead of discussing with the seller??????????????????????????????????????????
$1200!!!?? This card appears to be a later model, in which the 16-pin DIP socket has been replaced by a DB-25, with a corresponding change in the keyboard cable. -michael NadaNet and AppleCrate II: parallel computing for Apple II computers! Home page: http://home.comcast.net/~mjmahon "The wastebasket is our most important design tool--and it's seriously underused."