UBB Store

//c ENHANCED EPROM ROM CHIP APPLE IIC. ADDS UNIDISK 3.5 $12.00 + $4.65 s/h For Sale

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

//c ENHANCED EPROM ROM CHIP APPLE IIC. ADDS UNIDISK 3.5 $12.00 + $4.65 s/h

Price: US $12.00

LASTPHOTO FROM KANSASFEST CONFERENCE, JULY 2013Two Steves: Steve Wozniak, inventor of Apple II, with me, Steve BuggieENHANCEMENT ROM CHIPFOR APPLE IIC$12.00 each, plus $4.65 shipping to USA buyers(Worldwide overseas shipping: $17.00]
228 happy buyers can't be wrong!No offeren-price -inflation; same $12.00 price since 2004 !
SPECIAL QUANTITY DISCOUNTSBuy THREE for $30.00 plus $4.65 total USA shipping ($10.00 each)Buy TEN for $90.00 plus $4.65 total USA shipping ($9.00 each)
It enables use of the rare white-cased Unidisk 3.5 drive!The is a 28-pin custom ROM chip for the classic Apple IIC.It resembles the Apple brand enhanced ROM # 342-0033.Inside the IIC, the older UNENHANCED ROM is # 342-0277.The Enhanced ROM chip adds these features to your IIC:(1) Capability to operate the Unidisk 3.5" 800K external disk drive.(2) The checkerboard self-test: Hold down the two Apple-keys at power-up;If enhanced, you will see a moving checkerboard pattern whichends with, "SYSTEM OK." The self-test will identify any specificRAM memory chipthat has gone bad. Other deficiencies are alsoidentified. Thecheckerboard self-test is shown in the fourth photo.If youpresentlycan get the checkerboard self-test with your IIc, thenyour computer is already enhanced and my ROM chip is not needed.(3) A customized briefone-two word messageat the center-topof the opening screen. This message is displayed for threeseconds every time when the Apple IIc is powered up.
A two-sided instruction sheet to install the chip is included.Essentially,you just replace the existing 28-pin ROM chipwith this chip, then make two minor soldered changeson the IIC motherboard.A photocopy will be enclosed ofOtto Linzmeyer's article in the
January 1988 issue of A+ magazine, "THE APPLE IIC FAMILY TREE,"which describes firmware/hardware differences among
the three distinct versions of Apple IIC that were released
(1984-1988). Also enclosed will be a photocopied section from theApple IIc Technical Reference Manual (1985) that describesthe Unidisk 3.5 ROM code that is contained in this chip.The Apple IIC Plus differs totally from the three earlier IIc models.
If you bought a IIc CPU from me, then its ROM is already enhanced.Made in USA"PRINT PEEK" ROM TEST:"0" ON THE SCREENThe enclosed article, "IIc Family Tree,"presents a keyboard test to identifywhich ROM version your IIc presentlyhas. First, turn on the computer. Thenpress CONTROL followed by RESET. TheBasic prompt, a left-facing bracket ]will be displayed on the screen. Next,type: PRINT PEEK (64447) followedby RETURN. The computer's responseidentifies which Apple //c you have: 255 Original (unenhanced) //c 0 Unidisk 3.5 //c 3 or 4 Memory-Expansion //cInstalling the ROM chip purchased fromthis ad will upgrade your //c from the Originalversion to the Unidisk 3.5 version. It is impracticalto become a Memory-Expansion //c because thetwo earlier versions lack the motherboard socketfor the one meg Ram Express memory board.NEWS FLASH:ROM-ENHANCED IIC HARD DRIVEDecember 23, 2020A IIc user who bought this enhancedROM chip from me, reported that this chipenables the Apple IIc to operate a 32meghard drive, connected to the IIc at the DB-19external floppy drive socket. Can someone checkthis for me? I urged the buyer who reportedthis, to prepare a KansasFest presentation on it.Many Apple IIc users will be thrilled to confirmthat the ROM-enhanced IIc can operate an externalhard drive! Notify me as soon as possible, howthis capability can be achieved, and I will announceit in person at the upcoming KansasFest conference,at Kansas City MO, July 19-24, 2022.
REFUND GUARANTEE FORUSA BUYERSAND ALSO FORWORLDWIDE OVERSEAS BUYERS
The IIc ROMs are all guaranteed to work! About201 these ROM chips have already been sold.
All are pre-tested prior to shipping, and Ihave had no complaints, so far, from buyers.
CHOICE OF SCREEN-OPENER MESSAGESThis ROM-encodednine-character message appears atthe top of the screen when power is first turned on.Either the standard IIc enhancement message:Apple //cor this alternative message:Canadaor this alternative message:Enhanced!or this alternative message:KFEST //cor this alternative message:Woz //cor this alternative message: 3.5" Diskor this alternative message:Obama //cor this alternative message:Gallup NMor this alternative message:Bugg //cHHHHHHHHHHHHHHHHHHHHHSend me an message to indicateyour preference. If no preference is stated,then the opener message on your ROMchip will be the Enhanced! version.
MY TWO USA EPROM BURNERSPRODUCE THE ROM CHIPSAn Apple IIe interface card, THE SUPER EPROM ,created the original master ROM chips. Then,duplicationof the master chip is done withGANGPRO-8,by Logical Systems Corp. of DenverCO.The GANGPRO-8 makes perfect ROM chips,in eight-chip batches, every time. Your newApple IIc enhanced ROM chip is entirelyMADE IN USASPECIAL DISCOUNT FOR THE CANADIANAPPLE IIc ENHANCED ROM CHIP: TWOIIc CANADA ROMS $12.00 + S/HMy Irish ancestors farmed at New Brunswick Canada,1850 to 1900; Then they left Canada and resettled toMinnesota USA. The enhanced opening screen message,CANADA, at the top of the opening IIc screen, is nowavailable at half price: Two Canada IIc enhanced ROMsfor $12.00 plus shipping. This Canada IIc ROM specialcontinues indefinitely beyond July 1, 2022, Canada'sNational Day(Fete du Canada).SHIPPING COST: ONLYTHE ACTUAL POSTAGE!Some sellers conceal the actual postagecost; I have the software print the postage costat the top of the shipping label. If the actualpostage cost is $0.20 or more below what youpaid, I will refund the amount overpaid to your account, as soon as the package is mailed.QUANTITY SOLD: ADD 95 TO NUMBERSTATED AT HEADING OF THIS ADI sold 95 of these IIc ROM chips in the first four years.But I completely sold out of my first batch, so then reset my quantity number to zero.So, my total number sold is 95 plus thetotal stated at the heading of the ad.

USA shipping is $4.65.

The shipping cost covers the ROM, the articles and other

printed matter, and the enclosed diagnostic disks.

Shipping is WORLDWIDE. Shipping will be viapost office first class mail.
Generous combined shipping discount (USA only): On hardware purchases,

you pay the single largest shipping cost.Smallerhardware itemsin same parcel, will be shipped with no further cost! (USA only)Free local pickup at pickup at Gallup NM 87301.
HHHHHHHHHHHHH

27th Annual Apple II KansasFest Conference July 14-19, 2015

Rockhurst University Kansas City MO

PRESERVING FIRMWARE ON EPROMS:A KEY TO "APPLE II FOREVER"

Stephen Buggie

PsychologyUniversity of New Mexico, Gallup705 Gurley AvenueGallup NM 87301-6979(505) 863-2390 (H)(505) 870-9805 (C)
ABSTRACTMost computer equipment contain EPROMs in their circuits:CPUs, printers, interface cards, or peripherals. The EPROMchips contain firmware code to controloperation of thedevice. An EPROM looks like alarge IC chip: It is wide, with24 to 40 pins. There is asmall round window in the center ofthe upper side of the chip, with a microlattice of fine metalwires visible through the clear quartz-glass window. TheEPROM chips can be erased and reconfigured by hours ofexposure to ultraviolet light, followed by software-controlled"burning" of fresh code. The useof EPROMs allows the periodicupgrading of firmware. In mypresentation, EPROMs andrelated hardware will be shown and discussed. Knowledgeabout EPROM technology should be sharedamong Apple IIdevotees because the EPROMS can go bad after years of service.The firmware codecan be stored on floppy disks, and thenused to rejuvenate EPROMs that have gone bad. In the longrun, spanning future decades, Apple II equipment will survive onlyif the firmware code on theEPROMs has been preserved on disks;once on disk, the codeon could be preserved forindefinite archivingby recopying it to other long-lasting media such as CD-ROMs orflash drives.Apple II users should learn EPROM-burning skills,with the needed hardware, tocreate fresh copies of the firmwarecode for themselves and to be shared widely with class="MsoNormal" style="font-family: Impact; font-size: x-large; font-weight: bold;">

AVAILABLE NOW IN ASEPARATE AD:APPLE IIC BATTERY-PORTABILITY KIT Go to ad # 221447214363 $22.22 plus shipping221447214363The 16 ft. cord uses top quality wire:American-made red/black insulated stranded pure copperAWG-16 wire with DIN-7 female plug at one end, and 12v cigarettemale plug (with LED and on-off push-button switch) at the other end.Includes wires and connectors to operate your Apple IIc outdoors, off-the-AC-power-grid! Do Apple II computing at the beach, on a mountain top,or at any campground, even when the campground has no AC 115v outlets!Use your Apple IIc with a car battery from the cigarette-lighter socket,_or_ with a jump-start DC 12v battery, _or_ with alligator clips directly from the 12vbattery terminals. You will need to get a 12v color flat screen TV to use with yourApple IIc, new on from $150.00. My $22.22 battery portability kit supplies allthe rest! This kit was demonstrated to Apple II experts at KansasFest, July 2014.

INTERNATIONAL: SALES

TO OTHER COUNTRIES

I will ship to other countries.I retain the post office receipt as proof of mailing.

International mails in recent years have become very reliable, so I will replace

any ROM chip lost during shipping. Buyers have told me that 's "Global

Shipping Program" (GSP) is very expensive for small lightweight packages

such as this ROM chip, or for small keyboard parts such as keyswitches

or keycaps,so international first class mailing is preferred; even then,

U.S. postage ratesbegin at $17.00 for most foreign countries beyond

Canada.In mid-2020, has launched a special international

shipping service, by which the seller ships to a trans-shipment

service in CA or KY, from which it is carried to the foreign destination.