** We are sorry, SMC ROM SIMM is temporarily out of stock. It will be restocked in late November or early December. If you would like to know when an item will be restocked, click on the item you want on the right and specify it, then press the "Notify When Available" button. You will then be notified when the item is back in stock via the email address you entered.
*Only Black x1 in stock
Nov 14 2024, Crucible V2.0-beta Released!
Download here
Additional features include:
-ROM file creation can be done in 4 splits, 2 splits and single files.-In split mode, you can choose between 4 splits and 2 splits. This is for dividing into Lo and Hi, or LL ML MH HH. This is not a ROM SIMM specific configuration, but a general Mac ROM chip configuration.In addition, the reason for providing the x2 mode is that, specifically, when flashing data optimized for 27C256 to 27C512, there are rare cases where you simply want to double it. That's the reason.
-Join mode simply joins ROMs in series, which is useful for joining a BootROM to a BaseROM etc.
There are 2 types, select from options
2MB ROM SIMM / 32 USD
No EEPROM SIMM / 15 USD
This card is a ROM SIMM with the concept that users can freely program it with our great APP, Crucible!
Cards reverse engineered from Vintage Macs have their ROM chips replaced with PLCC32. The PCB is the 4x PLCC32 type you often see, but this is a redesign, not a clone.
We have prepared 3 colors to match your image. Black, Red and Purple.
It has an LED, but the color is only Blue.
Compatible with: SE/30, IIx, IIcx, IIci, IIfx,IIsi
*Can also be used when ROM hacking on some 040 machines and MacII. Most models require a SIMM socket to be installed.
Can be used by general purpose programmer
If you use TL866II+ or newly released T48 programmer, you can flash the program without using Custom ROM SIMM programmer. There is a post on Tinker Different's forums here with more details. Of course, we also accept questions about the program and flashing.
If you are new to ROM programming, it may be a little hard, but if you program it many times, it will gradually become easier. TL866II+ programmer is so popular that you can find many instructional videos on YouTube.
To make your own ROM
Crucible Apps
Use our apps called "Crucible" for the MacOS, Supports High Sierra to Ventura.
Crucible V1.1 Download here
Tutorial is here.Drake's amazing narration tutorial video:
1, Create a Boot Disk (.img)
2, Edit Boot disk with MiniVmac
3, Combine ROM and split the combined .bin into 4 files
4, Flashing the EEPROM with T48 or TL866II programmer
Optional EEPROM
Please select EEPROM from the options. This is the pre-programmed 2MB ROM(AMD AM29F040B x4pcs) for our SMC ROM SIMM card, but for a deeper dive into the world of Vintage Mac , we encourage you to learn a little bit about ROM technology with a ROM programming do-it-yourself project. It is recommended!
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You can use the EEPROM listed bellow:
SST39SF040 (2MB for 4pcs)
AM29F040B (2MB for 4pcs)
SST29SF010 (512KB for 4pcs)
AM29F010B (2MB for 4pcs)
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There is a shortage of EEPROMs worldwide, and prices have more than doubled. Best if you can get it locally.
In addition, when using used EEPROM recycled in China, there are quite a lot of defective products, so be careful.
*New EEPROMs can be purchased from Mouser or DigiKey.
Fixing poor contact in SE/30 SIMM sockets
We have designed a bracing for the ROM-SIMMs shown in the last picture, which we will give to everyone who buys a 2MB ROM-SIMM from us now. *If you select "No ROM chip", unfortunately we cannot provide bracing due to the cost.
CC BY-NC-SA 4.0, if you want to print it yourself the files are here. Not for sale. For your personal use only. If there is no battery cover, install the spacer block. See the photo for the structure.
https://9b917908-9bcc-4794-acf9-af00c9274443.usrfiles.com/archives/9b9179_0b2e07071f6d40d8afc117dbfe4a9fb4.zip