Re: SWIM Chip replacement for PCTransporter

["Randall Flagg" <rfs@_nospamz_apple2.com>]

Hello Henry,

thx for reply. I know the text you've posted. I also found other posts on 
newsnet where someone persists that it is not a SWIM chip which is used as 
the MFM floppy disk controller on the PCT.

AE itself does not call it "SWIM" but  "MFM floppy disk controller.... This 
controller is capable of reading and writing MFM disk formats with 3.5" 80 
track DSDD drives (720K bytes capacity) and 5.25" 40 track DSDD drives (360K 
bytes capacity). It was developed by the designers of PC Transporter to 
emulate the NEC 765 disk controller that is common to most PC-compatibles."

I know the MAC IIx could be upgraded from a IWM to a SWIM in oder to support 
high density 1.44 MB disk - the same with superdrive - so why does the PCT 
only support 720K disks? Anyone with a superdrive contoller out there to 
have a look at the SWIM??. So as there are no datasheets from Apple 
(why???), I guess I just have to try. On the other hand it is an Apple chip 
and not a custom LB LTD one - so good chance for beeing a SWIM (or a 
predecessor of it).

The IC is not socketed. And I am sure it is dead, because I killed it by 
myself. I could kick myself for this stupid one but it happened. If you want 
to have a look at the disaster: 
http://www.legacy-parts.de/Defect_SWIM-IC.tif . Its a shame.

I bought the PCT ten years ago. I was not cheap but I think it is the latest 
hardware rev. which was released (rev E Week28/1990).

Thanks for offering your help - I have no SMT tools around but I first will 
ask at work before sending it to overseas to you. I don't think a socket 
will fit as there is not enough space but it would not be a bad idea to have 
one -  if ever beeing devastating again ;-))  So what kinda SWIM chips do 
you have - the 010-0101-1 ones?


Randall Flagg



"Henry" <apl2research@comcast.net> schrieb im Newsbeitrag 
veOdnRWSjMSGrHTeRVn-rA@comcast.com">news:veOdnRWSjMSGrHTeRVn-rA@comcast.com...
> Quick search on the Net found this, but it's only one post - so it's hard 
> to say for sure.
>
> Website: http://lamp.a2central.com/GenieLamp_A2/Text/1994/ALMP9402.TXT
> Do a search for "010-0101-1".
>
> Post:
> SWIM CHIP   I need a bit of help...
> """""""""   I have a PCT here for repair, I believe it has a dead drive
> controller chip on it... What does this have to do with SuperDrives??
> Simple, the chip in question is an Apple chip! I strongly suspect that AE
> obtained these from Apple, and that they may be the same chip used on the
> SuperDrive controller cards.
>
>     The Apple part number is:010-0101-1 (c) Apple 1987 It is a 44 pin
> PLCC (about 3/4" square surface mount chip)
>
>     If someone with a SuperDrive controller could check for a chip with
> this number (it might end with -2 or higher) I'd appreciate it. (It would
> at least give me an idea of where I might be able to find a chip to fix
> this PCT)
>
>     Thanks!
>
> -Harold
> (Wed Night RTC 11pm 1am EST)
> (Hdwr probs handled live!)
> (H.HISLOP, CAT11, TOP7, MSG:67/M645;1)
>
>>>>>>   ]-[arold, that chip is indeed the same chip as used on Apple's
> """""   SuperDrive controller card.  It's the SWIM (Super Wozniak
> Integrated Machine) chip, which replaced the IWM (Integrated Wozniak
> Machine -- yes, they switched the "I" and the "W" because "SWIM" sounds
> better than "SIWM" :) chip on Macs sometime after the Mac SE came out.
> Applied Engineering purchased a number of those chips from Apple for use 
> on
> their PC Transporter cards, to enable the PCT to have Apple drives
> connected directly to it and read and write data in MFM format with them
> (they had to do some tricks in microcode to get them to do all that on 
> 800K
> drives designed only for GCR, though, and as people with PCTs know, it's
> not perfect).
>
>                                                        -= Lunatic     (:
>                 (A2.LUNATIC, CAT11, TOP7, MSG:69/M645;1)
>
>
> So there we have it.  Proof it's an SWIM?  Not 100% but it does look good 
> that it is.  Did you get the Transporter at a good price?  Might be the 
> same one as talked about in the post! ;-)  BTW - my IC on the Transporter 
> is mounted.
>
>
>
> Henry S. Courbis
> www.GSE-Reactive.com
> Apple II Series Legacy Hardware - Come take a look at what we have to 
> offer!
>
>
> "Randall Flagg" <rfs@_nospamz_apple2.com> wrote in message 
> news:ds9ql3$k61$1@online.de...
>> Hi,
>>
>> for years now I am looking for a SWIM chip to replace the fryed one on a 
>> PCTransporter. As I don't found a source for buying one I found out that 
>> Mac IIv computers also have a SWIM chip onboard, but in a newer revision. 
>> Can anyone confirm if I could use the Mac's SWIM IC as replacement for 
>> the PCT?
>>
>> PCT SWIM IC:
>>
>> 745 V I662
>> VGT7764-6018
>> 010-0101-1
>> c Apple 1987
>>
>>
>>
>> MAC SWIM IC:
>>
>> 9316BS 404051
>> VC2982-0002
>> 34390061-A
>> c Apple 88
>>
>>
>> Both are 44 pin PLCC packaging.
>>
>>
>>
>> RFS
>>
>>
>>
>> P.S: If there are other sources for SWIM chips... tell me!
>>
>
>