Apple LCIII Restoration
- Run a HTTP server, and serve static pages on the Internet.
- Relive some great times playing Maelstrom.
- Develop a custom SCSI-2 to SD Card converter (see SCSI2SD), use the converter to boot the LCIII, and win a bet. I shall enjoy eating free Nandos. Cheers AJ.
|Part||As-bought State||Current State||Comment|
|Mouse||Missing||Still missing||Replace with Apple_Desktop_Bus_Mouse_II ("Teardrop" mouse).|
Macintosh Portrait Display
|Heavy yellow discolouring. Unknown working state.||Replaced with a standard VGA monitor. See Macintosh VGA||Uses a somewhat non-standard 13w3 connector. This was not the standard (colour) monitor that was supplied with the LCIII, and I probably won't bother trying to get it going. An adapter cable to make use of a VGA monitor is more than sufficient.|
| Power supply
Dyna Comp Inc DCF 353.
All rails read 0V on the multimeter.
|(Temporarily) replaced with an older ATX power supply that still had the -5v rail.||Old, yet still-working, LC power supplies are fairly easy to find on ebay and elsewhere. However, these old supplies won't last forever. I plan to replace this with a small circuit board that accepts an ATX power supply input, and creates the required -5v rail. This then allows me to use an easy-to-find PicoPSU (or similar), and replace the supply in the future if it fails.|
| SCSI Hard drive
Apple branded Quantum Pro Drive 500Mb LPS270 (Firmware copyright Apple Computer Inc. 1994)
The drive controller appeared to work when connected to a modern PC with PCI SCSI card, but the drive refuses to spin. No amount of hitting, freezing or swearing could convince the drive to spin.
|Working SCSI device required to boot||Drive will be replaced with a custom SCSI -> SD card device. SCSI2SD|
|Significant discolouration.||Requires restoration to remove the discolouration||A Hydrogen peroxide solution + UV light can be used to restore the case to its former glory. Just take care to mask the Apple logo at the front. See |
| Logic board
Apple part no. 820-0650-A
|Confirmed working.||Working||On boot, the distinctive power-on sound is heard, followed by a flashing question mark in a disk icon (since no disks are working yet).|
| Ethernet expansion card (10Base-T, RJ45)
Apple Computer Inc 1993 Ethernet LC Twisted-Pair card
|Unknown||Not required||Could make use of the RS-422 serial port to run a PPP connection if the ethernet card doesn't work.|
|Floppy drive||Unknown||Not required||This drive is probably not required anymore. Trying to find working floppies is difficult, and they will only degrade further over time.|
| VRAM Upgrade
Apple part no. 820-0605-A
|Unknown||Not required||This is a 512KB upgrade, but the LCIII only supports a total of 768KB, including the 512KB on-board VRAM.|
| RAM Upgrade
Samsung KMM5321000CV-7 9428 4MB 72pin 70ns
|Unknown||Unknown||Could be replaced with a 32MB SIMM. An additional 4MB onboard memory is available on the logic board, but this is probably insufficient to do anything useful.|
Hacked up VGA cable and ATX power supply attached. No boot disks.
- Microchip AN591 AppNote (ADB interface details)