7/26/2023 0 Comments Quickboot mac![]() Lisa QuickBoot is not abandonware (as of May 2018, at least). This is a small market and since QuickBoot is not a requirement to use a Lisa with the SCSI card and MW+/II, the market is smaller still. QuickBoot wasn't developed until the Lisa was substantially obsolete, and the buyers are limited to Lisa enthusiasts that want to run MW+/II. Purchase of a Lisa SCSI card didn't include a license for QuickBoot, they are separate products from different companies. QuickBoot was not developed by Sun Remarketing, and so the effort to develop the code wasn't subsidized by sales of the SCSI card and the Lisas they were sold in. ![]() QuickBoot adds the ability to cold boot MW+/II from a SCSI drive to avoid using a floppy or ProFile. The SCSI card is functional without QuickBoot. Since the Lisa ROM has no knowledge of SCSI or a Macintosh hard disk, code to cold boot from a SCSI drive requires implementing SCSI, and navigating the Macintosh File System to locate and load MW+/II on the SCSI drive - that's what the LSAC/QuickBoot code does. That became the user-installable QuickBoot product released in 1992. With some further effort, the LSAC code was trimmed/optimized to fit in a 2732, and the piggyback PAL was added to implement a page switch to enable access to the entire EPROM without modifying the board. The Lisa expansion slots do have 12 address lines. A 2732 is 24 pins, but since the SCSI board implemented only 11 address lines, only half of a 2732 EPROM is accessible. However, a 2764 won't work in the socket of the SCSI board as it has only a 24 pin socket with 11 address lines. The LSAC's SCSI boot code fit in a 2764, and it can boot MW+/II via the SCSI card or via an XLerator board's SCSI port. Subsequent restarts of the Macintosh System usually did not require the cold boot floppy.Īs ProFiles were failing rapidly, a way to boot the Lisa from a SCSI drive was desired, spurring development of what became the LSAC (Lisa SCSI Accessories Card) which includes two 28 pin ROM sockets. Once MW+/II is loaded, it recognizes the SCSI card and the Macintosh system can be loaded from a SCSI drive (or a ProFile or floppy). So to use the SCSI card with the original codeless SCSI board ROM, one would cold boot MacWorks Plus or MacWorks Plus II from either a parallel port hard disk (eg. The Lisa's CPU board ROM predates the SCSI card, and has no ability to use it. The rest of that 2716 EPROM is unused/zeros. The original SCSI board's ROM (as sold with the card) contains only an ID word to identify the type of card ($00 $1B as the first two bytes). To sell more of them, they developed the SCSI card and MacWorks Plus to make the Lisa closer to the Macintosh Plus in capability. Sun Remarketing had a lot of Apple's Lisa computers to liquidate. The original Lisa SCSI card was developed around 1989 by Sun Remarketing (now defunct), not Apple Computer Inc. It's great there is still a little interest in the Lisa SCSI QuickBoot upgrade.Īttempting to address some of the questions and speculation: Did it sell so poorly he's still trying to break even? All that is left is people who just want a bit of extra functionality. Why is the developer even still trying to make money on the upgrade? Nobody has used a Lisa for a daily driver in almost 20 years. ![]() You don't want me to keep asking? Very well, I'll stop after this post but if you're going to try and nail me to the wall for a ROM image request you better also tell the VCF admin team that the discussion, copying and distribution of ANY ROM images is no longer allowed because making one chip the exception is an absolute load of crap. Yet when someone wants to burn this particular ROM themself to save money (I love my Lisa, but I love my education more) someone (I'm assuming you're the seller of the ROM kit and pardon me if you're not) jumps out of the corner of the internet to scream FOUL because they're being undercut by someone who isn't completely stupid. Commodore mask Roms, TOS upgrades, hell, even ROM dumps from Apple systems. Second, in the vintage computer world we've copied, duplicated, dumped reflashed and otherwise replicated and distributed hundreds if not thousands of assorted ROMs, system bootstraps, solid-state applications and microcode level components, many of which are also under copyright from every company from Apple to Zenith but otherwise nobody has ever seeked legal action on someone replicating a chip for repairing another system. How else am I to even ask for use? You won't even answer your damn email. Otherwise it's very hard to describe the odd piggyback arrangement when you seem to own all the known images of the kit. For starters you should consider using anti-hotlinking if you don't want people using your work.
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