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My humble collection!

G

GearTechWolf

Experienced Member
Joined
Apr 24, 2015
Messages
264
Location
Washington
Lessee here, how many can I remember off the top of my head- There's my fore-mentioned Sinclair PC500 (Amstrad PC1512) that I'm currently working on; My Apple/Mac collection- IIci, Performa 475, Performa 575, Mac Plus, Mac Classic II, A Motorola-made Mac clone, a few iMac colors, an EMac, and a dead flat-panel iMac I've yet to dissect for parts; My Commodore collection- A working Vic-20, 3 dead 64s, A 128 that got zapped when my jury-rigged power-supply adapter got shorted by a falling bit of clutter (bare wires = BAD idea!), and a later 128-styled 64 (can't recall if I've tested it); A huge Nematron board, maybe 12"x18"? (haven't found much data on it); A Wang board which I think is from a Wang OIS (uses a Z80); and some kind of all-in-one that used a phone handset type socket for the key board. More to follow as I find/remember them!:)
 
Recently picked up a TRS-80 Color Computer 2 (CoCo 2) at the downtown indoor swap-meet, came with documentation, some slightly damaged joy-sticks and not much else, but it works! So far I've disassembled everything, cleaned all the casings up, all that's left is cleaning the key-board keys and the main-board. While currently functional, I want to remove the grunge and fuzz from the main-board, but so long as I give it ample time to dry after washing it should be fine. Forgot to take 'before' pics of the casings, but they brightened up considerably after a good scrub and I'll see about getting a shot of the main-board prior to cleaning so you folks can see the fluff-n-grunge. Judging by the bent-over/flattened joy-stick -er- sticks, it was in storage somewhere for a while, but aside from that and some scuffs-n-such she's in real nice shape! Catch ya later!:cool:
 
Reminded by a an eBay page I saw while browsing, I also have an Apple IIc with monitor, functionality unknown. Come to think of it, I have an old Compaq(?) laptop (heavy too!) but the hing-mounts busted and I have yet to fix them. More as I remember/run across them! (though that's probably most of them)
 
Found an unmarked cart I had laying around that didn't fit any of my Commodores or anything else I had and figured I'd try it against the CoCo-2, it fit!
What's more, it worked! Hello Project Nebula! I'm sure at some point I'd opened the case and noticed the 'Tandy' marking on both board and chip, but I'd forgotten it until recently. So hey, now I actually have a way to test my joy-sticks after I clean and repair them! Seems the space-bar isn't currently working though, I'll have to fix that! Kinda hard to put in programs without it!
I think I actually have some kind of Tandy-PC somewhere, but I'm not sure in what condition... I remember the hard-drive was beyond repair, a bearing had let go and released its balls to roam around inside the case, skating across the drive platens.
Pretty sure I have a single 286, one-or-more 386 units and maybe some still-working 486 boxes. Sadly I've been stripping various old mobos (using a torch!) that were victims of improper storage or were flaky when I got them years back only to completely fail later on. On the upside, I've got piles of chips-n-parts to play with!:twisted:
 
Small update, turns out the Wang board that I have is from a 4230 terminal! Also, I finally found schematics for my Sinclair PC500 (Amstrad PC1512), if I get the missing STK7358 replaced with one from ebay, it might yet work!
 
Another small update, figured I'd post all the data off my huge Nematron board to see if anyone has any info on it. NEMATRON CORPORATION ASSY 110A0041 REV .___
It takes four sticks of 30-pin SIMMs for ram, it has three ISA slots (two 16-bit flanking an 8-bit), one DB-25 port, a 5-pin AT keyboard port, four DB-9 ports (two male, two female, not grouped by gender of port), a 34-pin header with retaining latches, a plain 34-pin header for internal floppy, a 40-pin header for IDE, a couple 8-pin headers, a 9-pin header (for add'l serial?), a 16-pin header, a 48-pin header, two 64-pin ISA-style slots in line with each-other (separated by a little over .25 inch), and an 11-pin header for power. On to all the major chips on the board: First, the non-socketed: AMD Intel P80C31BH microcontroller, a pair of NS16450N Serial I/O controllers, a pair of P8259A Programmable Interrupt Controllers, and a ton of 74-series glue logic. Then, the socketed: an AM27C256-150DC CMOS EPROM (Marked: NTC-GDT REL. 1.3 331A0195 U34*), a P8031AH microcontroller**, a INS8243N input/output expander**, a P82C54-1 programmable interval timer**, a P8237A-5 multimode DMA controller**, three R65F11AP 8-bit NMOS single-chip microcomputers**, a CHIPS PC/AT compatible chipset (composed of P82C201-10, a P82C202, a P82A203, a P82A204, and a P82A205)**, A SN74LS612N memory mapper**, a WD37C65B-PL floppy controller**, a Paradise PEGA1A (video chip?)**, an AM27C256-155DC CMOS EPROM (Marked: IWS-4000 REL. 2.0 EGA U55*), A LATTICE GAL20V8A-15LP EE PLD**, an NCR 53C80 SCSI controller**, a labelled EPROM (Marked: NEMATRON CORP. REL. 2.0-46 331A0249 U95*), a labelled EPROM (Marked: NEMATRON CORP. REL. 2.0-46 331A250 U96*), eight MB81464-12 DRAMs and lots of small chips.
*The 'U' numbers are placement on the board, which is how I knew where each (marked) chip belonged. **This chip doesn't have a label so it might just be one I stored in an empty spot, or it could have come from the same container that held all the marked chips and other components that had been pulled from the board.
 
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