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lisa2

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  1. lisa2

    AppleTalk net cable

    Read this and all your questions will be answered: http://www.applefool.com/se30/ Rick
  2. lisa2

    Macintosh 512K and cables

    OK, my guess is that is a US spec ( ~120V ) system that was used in another country with different power ( ~220V ?? ). The wires went to/from this added internal power converter. thanks, Rick
  3. lisa2

    Macintosh 512K and cables

    There is more going on here than those extra wires, what is the vertical mounted black box opposite of the analog board? Seems like a lot of hacks are in this system.. Rick
  4. Also the plus has a boot issue with some SCSI controllers, a solution is to cut pin 40 (RST) on the flat ribbon cable : ROM boot code problems In the process of looking for a bootable SCSI device, the boot code issues a SCSI bus reset before each attempt to read block 0 from a device. If the read fails for any reason, the boot code goes on to the next device. SCSI devices which implement the Unit Attentioncondition as defined by the Revision 17B SCSI standard will fail to boot in this case. The read will fail because the drive is attempting to report the Unit Attention condition for the first command it receives after the SCSI bus reset. The boot code does not read the sense bytes and does not retry the failed command; it simply resets the SCSI bus and goes on to the next device. If no other device is bootable, the boot code will eventually cycle back to the same SCSI device ID, reset the bus (causing Unit Attention in the drive again), and try to read block 0 (which fails for the same reason). The `new' Macintosh Plus ROMs that are included in the platinum Macintosh Plus have only one change. The change was to simply do a single SCSI Bus Reset after power up instead of a Reset each time through the SCSI boot loop. This was done to allow Unit Attentiondrives to be bootable. It was an object code patch (affecting approximately 30 bytes) and no other bugs were fixed. For details on the three versions of Macintosh Plus ROMs, see Technical Note #154. We recommend that you choose an SCSI controller which does not require the Unit Attention feature--either an older controller (most of the SCSI controllers currently available were designed before Revision 17B), or one of the newer Revision-17B-compatible controllers which can enable/disable Unit Attention as a formatting option (such as those from Seagate, Rodime, et al). Since the vast majority of Macintosh Plus computers have the ROMs which cannot use Unit Attention drives, we still recommend that you choose an SCSI controller that does not require the Unit Attention feature. If an SCSI device goes into the Status phase after being selected by the boot code, this leads to the SCSI bus being left in the Status phase indefinitely, and no SCSI devices can be accessed. The current Macintosh Plus boot code does not handle this change toStatus phase, which means that the presence of an SCSI device with this behavior (as in some tape controllers we've seen) will prevent any SCSI devices from being accessed by the SCSI Manager, even if they already had drivers loaded from them. The result is that any SCSI peripheral that is turned on at boot time must not go into Statusphase immediately after selection; otherwise, the Macintosh Plus SCSI bus will be left hanging. Unless substantially revised ROMs are released for the Macintosh Plus (highly unlikely within the next year or so), this problem will never be fixed on the Macintosh Plus, so you should design for old ROMs. The Macintosh Plus would try to read 256 bytes of blocks 0 and 1, ignoring the extra data. The Macintosh SE and Macintosh II try to read 512 bytes from blocks 0 and 1, ignoring errors if the sector size is larger (but not smaller) than 512 bytes. Random access devices (disks, tapes, CD ROMS, etc.) can be booted as long as the blocks are at least 512 bytes, blocks 0, 1 and other partition blocks are correctly set up, and there is a driver on it. With the new partition layout (documented in Inside Macintosh volume V), more than 256 bytes per sector may be required in some partition map entries. This is why we dropped support for 256-byte sectors. Disks with tag bytes (532-byte sectors) or larger block sizes (1K, 2K, etc.) can be booted on any Macintosh with an SCSI port. Of course, the driver has to take care of data blocking and de-blocking, since HFS likes to work with 512-byte sectors." Rick
  5. Here is a little more information from Apple Technote DV14 dated July 1,1987: "On the Macintosh SE and II, there is additional hardware support for the SCSI bus transfers in pseudo-DMA mode. The hardware makes it possible to handshake the data in Blind mode so that the Blind mode is safe for all transfers. On the Macintosh Plus, the Blind transfers are heavily timing dependent and can overrun or underrun during the transfer with no error generated. Assuring that Blind mode is safe on the Macintosh Plus depends upon the peripheral being used. On the SE and II, the transfer is hardware assisted to prevent overruns or underruns." HTH. Rick
  6. There is a SCSI issue with accelerated Macintosh Plus models, "blind" SCSI transfers fail due to the "blind" mode being heavily timing dependent on these models. My guess is that your spinning drive's driver most likely has "blind transfers" disabled, and your SCSI2SD is formatted using a driver that uses "blind" transfers. Try reformating the SCSI2SD using a drive setup tool that allows you to turn off blind transfers like LaCie Silverlining. Good luck. Rick
  7. Yes, the IIc serial ports (printer and modem) are RS-232 using a 5 pin DIN connector.
  8. lisa2

    Netatalk SD Card Image?

    I can vouch for using A2server, as NJRoadfan said it is not just for Apple 2's and is a great solution for connecting older Macs. You may also want to look at MaciPpi. It is another great pre-configured Netatalk solution.
  9. lisa2

    Identifying Cards in a II+

    The card in slot 1 is a parallel printer adapter. On the end of the attached cable is a 36 pin Centronics (Amp) connector. It's understandable that is can be confused with a SCSI cable, the common connector for SCSI is a 50 pin version of this same style Amp. connector. The construction of the board/cable looks Japanese, most likely this a interface board that came with/from a printer manufacturer like Epson/Oki/NEC etc.
  10. lisa2

    Problem with FloppyEmu

    I have a AEHD+, my opinion is that they are not rare. While it does support Macintosh 1.44 disks, the main reason to have one back in the day was for compatiblilty with PC formatted disks. Using AEHD+ you can not boot from a 1.44 disk on a older non-FDHD mac. I also have a couple of floppyEmu's, and I disagree with the title of this thread, the fact that older Mac's do not support MFM disks is not a "problem" with the floppyEmu. The floppyEmu emulates a floppy disk and drive at a hardware level, it works very doing this. thank you, Rick
  11. D1 looks like a surface mount LED to me, does is light up?
  12. lisa2

    Best Hard Drive option for IIgs

    Your missing an option: ADTPro Virtual Drive
  13. lisa2

    Lisa1

    That is what I was afraid of. You have major damage to the IO and mother boards. At get this working again, you will need to replace (or repair) those boards and possibly the card cage pan. In reference to your original post, you do not have a Lisa 1 anymore, but a Lisa 2 that needs a lot work, but is still worth saving. Rick
  14. lisa2

    Lisa1

    It's clear from the photo that the system was converted (upgraded) to be a Lisa 2 (this was very common at the time). Before you attempt to turn it on, open the back cover and see if the white battery pack in the lower right corner of the IO board (the large green PCB facing you with the cover off) is present and take some close up photos of the area. I fear that if it's been sitting in the box since 1987 you will have battery damage. Also, in your photo you have a Macintosh mouse and a Macintosh Plus keyboard in addition to the lisa keyboard and mouse. Rick
  15. lisa2

    Lisa1

    It was upgraded?? Most Lisa 1's were upgraded to become Lisa 2's (MacXL's), this is what makes the ones that weren't upgraded rare and the ones that were upgraded not-so-rare. Does the system (or you) still have the 5 1/4" disk drives and faceplate? Was the battery removed? Photos would be a help. Rick
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