Spring comes early in Texas; too many days in a row of 80 degree weather triggers my spring cleaning subroutine. I have just poorly photographed and barely cataloged 28 S-100 cards, all but one, made by IMS -- Industrial Micro Systems. None are tested. My main criterion for picking will be whatever is easy for me, but I can't say that unfairness, prior exchanges, and unfounded opinion will also influence which board goes to where. That is, if I'm so lucky that anybody wants these. The boards are well made, although some have had parts removed (most are complete). None have been tested by me. I've had them for, uh, I guess two years, and the previous owner was given them some years before. You can see the index and pictures here: http://home.pacbell.net/frustum/s100/ Each card is in a 6"x10" antistatic bag, inside a padded mailer. They will be further padded with bubble wrap and boxed, and sent via USPS priority mail. You pay the shipping. I'll give people a few days to respond, then I'll get to work boxing and mailing. Please let me know which board(s) you are interested it, and if you have some specific need or use for one, let me know that too as it may influence the judge. Responding to the list instead of frustum at pacbell.net is an automatic 3/10th scoring deduction. If you are wonder why there are no cards 11, 22, or 33, it is because I used my children's number blocks to act as an index record when photographing, and there is only one of each number. :-) Below is the index: Box #1 ======================================================================== 1 - IMS A645 Rev B Z80 CPU; 2K boot ROM labelled "TST"; empty spot for RTC 2 - IMS C00451 Z80 CPU, (c) 79 3 - IMS A930 Rev C Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 50 pin connector (8"), (c) 84 4 - IMS A443 I/O Board, NS 8255 PIO, "IPL REV 1.4" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT, one ear missing from connector, two empty sockets; not sure if they should be stuffed or not 5 - IMS A1021 Rev C, (c) 1983, 64K DRAM, with parity and parity error indicator All 9 DRAMs have been removed, but otherwise intact 6 - IMS C00451 Z80 CPU, Rev C., (c) 79 7 - IMS C00442 I/O Board, NS 8255 PIO, "IPL REV 1.4" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT 8 - IMS C00480 4-Line Comm. Controller (NS 8250 * 4) 9 - IMS A930 Rev C Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 34 pin connector (5.25"), (c) 84 12 - IMS A930 Rev B Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 34 pin connector (5.25"), (c) 82 13 - IMS C00442 I/O Board, NS 8255 PIO, "IPL REV 1.1" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT 14 - IMS A971 Rev A (c) 83, Z80A CPU board, but it has been stripped of some chips, including the Z80 and boot ROM, a few jellybeans, likely a couple serial controllers, and a RTC 15 - IMS A971 Rev B (c) 83, Z80A CPU board, but it has been stripped of some chips, including the Z80 and boot ROM, a few jellybeans, likely a couple serial controllers, and a RTC Box #2 ======================================================================== 21 - IMS A1030 Rev A, (c) 83, Isolated I/O board; 16 inputs, 16 outputs 23 - IMS A1270 Rev B, (c) 84, Z80B Master/Slave Board; missing Z80, two banks of DRAM, RTC, serial chip, but jellybeans are there 24 - IMS C00464, (c) 79, 64KB DRAM, parity checked, 4x9x16Kb all DRAMs missing 25 - IMS C00401, (c) 79, floppy controller, NEC 765, NEC 8257 (DMA) 50-pin connector (8") plus a 16-pin connector (??) 26 - IMS C00480, (c) 79, 4-Line Comm. Controller, 4*8250 27 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 28 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 29 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 31 - IMS A1021 Rev C, (c) 1983, 64K DRAM, with parity and parity error indicator All 9 DRAMs have been removed, but otherwise intact 32 - IMS C00451 Z80 CPU Board Rev B, (c) 79 34 - IMS A1100 Rev D, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 35 - IMS A1100 Rev C, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 36 - IMS A1100 Rev C, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 37 - IMS A1010 A/D Converter, Rev A, (c) 83, 8 Channels; NS ADC0809 38 - unknown mfr modem Finally, sorry for the poor quality photos. I'm not a photographer and I didn't check them until after I had already taken all the pictures and slipped each card into an anti-static bag.