The computer tries to boot drive A of an attached dual 8 drive Thinker Toys unit when the RUN switch is activated. I do not have the proper board to test with a terminal. The computer was completely disassembled.
All metal chassis was washed and cleaned. The PSU was removed, cleaned, and blown/wiped dust free. The main BUS board was blown dust free. All other various items were blown/wipe clean of all dust and debris.
The Computer was reassembled for testing. The PSU was slowly powered up over 4 days to let the large capacitors revitalize. The PSU is showing voltages within the proper ranges for both rails.
The front panel was also disassembled. The circuit board was blown dust free and the LED aligned. All switches leavers were washed and cleaned.
All socketed ICs (and there was a lot of them) have been reseated. All cards were blown/wipe dust free and the card edges (top to bottom) were cleaned. The ribbon cables were cleaned. The power and I/O ports were cleaned.There are a few scratches on the top of the case but nothing major. The fan, fan housing, and mesh filter have been cleaned. The computer comes with its original IMSAI owner's manual binder. It has been cleaned up. There are many additional manuals and documents included with this sale. I will list them at the bottom of this page. Many are manuals for the included cards. The cable's pin-out does not match this computer. The Reset and Run leavers are a bit loose but work correctly.
I have included 2 rocker switches if you want to solder in new ones. They look a bit dirty but it is just the tough texture that has been rubbed off from past usage.A 5 amp 250v fuse is suggested by the forums but I replaced the old 3 amp 250v fuse with a fuse I had on hand that is also 3A, 250v. A small bag of a couple extra nuts and screws along with the original fuse are fasten to the top of the larger transformer. Also included is an IMSIA 8080 8 Dual Floppy Drive Thinker Toys. The dual drives were also Refurbished, Tested, Clean, and Working. This is a very good condition Thinker Toys dual 8 floppy drive. The unit appears to be working. The unit was opened up and the inside thoroughly dusted out. The heads have been cleaned. The unit was powered up very slowly using a variable A/C transformer over several days. This help revitalizes the large capacitors in the power supply.
The drive motor powered on smoothly when the power switch is flipped. The motors are constantly spinning when it is powered on. The disk closure and eject systems were inspected and are in good working condition. The upper case has been washed and cleaned. It has a few marks from age and being moved.This is a very heavy unit. It was connected to an IMSIA 8080 with the correct card. When the computer was powered up and the RUN switch was flipped the drive was activated and it appeared to search for a boot sector. I do not have a screen (terminal), keyboard, or proper boot disk to test further.
The top cover is difficult to remove and replace. Please note placement of screws. One on the bottom is different then the others. More then likely, I will have to double-box both the IMSAI computer and the 8 floppy drives. Included boards installed front to back (best of my knowledge).
North Star Computer 1977 Z-80A Processor Board. Godbout 1977 Econoram II - filled with 8K of SRAM. Seals Electronics RAM Card filled with 8K of SRAM.
Thinker Toys 1978 SuperRAM 16 Static Memory Board Filled w/16K of SRAM. JTM 1978 16 SRAM installed. Processor Technologies 1976 8K SRAM installed. Godbout 1977 Econoram II 8K of SRAM. Thinker Toys 1980 Disk Jockey 2D/B (Floppy Drive Card).
Processor Technologies 1976 3P+S / I/O. Manuals in no specific order.
Thinker Toys Morrow Designs Catalog. SA800/801 Diskette Storage Drive (copy of the manual).
Disk Jockey 2d (copy of the manual). Digital Research CP/M 2.2 User Guide. Digital Research Introduction to CP/M Features and Facilities. Digital Research CP/M Assembler User Guide. Digital Research Context Editor for the CP/M Disk System.Digital Research CP/M Dynamic Debugging Tool User Guide. Digital Research CP/M Interface Guide. Digital Research CP/M Alternation Guide.
Processor Technologies 3P+S Input/Output Module. Processor Technologies 8KRA Static Read/Write Memory Module. California Computer Systems Model XVI 16 Static RAM Module.
Seals Electronics 8K SC Memory Plug-in Printed Circuit. NorthStar Z80 Processor Board ZPB-A. Microsoft Basic Compiler User's Manual. Microsoft Basic 4.51 Reference Manual (I believe a copy).QSORT Ver 1.0 User's Manaul (might be a copy). Links-80 Users Guide (might be a copy). Disk Control Files Operations IMSAI / IBM PC (copy). Solid State 2P + 2S Board Manual (might be a copy). Compupro Disk 1A Manual (copy).
Compupro 816C Standard Switch Settings (copy). Gifford MP/M 8-16 System & Virtual Terminals Manuals. LF Technologies Ultima V VI Video Display Terminals Manual.
CP/M Utility / DBASE II. Many more but basically almost the same title on each of the disk. They are all copies and not originals. I have another IMSAI, I also have a couple of keyboards, and a couple of disk drives as well.Please check out my store. Keep in mind, that I mainly sell vintage computers and vintage computer accessories. That said even though the box/item may not show damage, the internal mechanism may have been damaged or jarred from a rough truck and/or plane ride. I will work with ALL my customers to resolve the problem. Personally, I do not think that this is an acceptable way to return items. We are not Walmart or Costco that cannot absorb these financial damages.
Thank you for your patronage. The item "Refurbished IMSAI 8080 Computer & Dual 8 Floppy Drive Thinker Toys +EXTRAS" is in sale since Wednesday, June 10, 2020. This item is in the category "Computers/Tablets & Networking\Vintage Computing\Vintage Manuals & Merchandise".
The seller is "econsaints" and is located in San Jose, California. This item can be shipped to United States.