bkw777/Teeprom7These are all virtual UV EPROMS / virtual mask roms, using electrically programmable EEPROM, FRAM, or FLASH with the pinout adapted to work in place of 27Cxx UV/OTP EPROMS or standard mask roms, on a specially shaped…
Meeprom is an open-source printed circuit board by bkw777, from the bkw777/Teeprom repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 38 × 16.6 mm with 8 parts on 31 nets, routed with 128 tracks and 8 vias.
It is built around the AT28C256-15SU and CL21B105KAFNNNE. Its parts include 1 capacitor, 1 resistor, 1 IC and 1 connector.
These are all virtual UV EPROMS / virtual mask roms, using electrically programmable EEPROM, FRAM, or FLASH with the pinout adapted to work in place of 27Cxx UV/OTP EPROMS or standard mask roms, on a specially shaped PCB and 3d-printed carrier to create a virtual Molex 78802 module to fit inside a Molex 78805 socket.
Teeprom is an EEPROM module for Tandy Model 100, 102, & 200 portable computers.
Meeprom is an EEPROM module for any other Molex 78805 socket that expects a 27C256 or standard mask rom chip. Not for Model 100/200. Examples: Tandy Model 600, Kyotronic KC-85, Epson PX-4, PX-8, handheld terminals like Intermec 9440, various industrial equipment like Allen Bradley SLC-500 PLCs, etc.
Virtual 27C32 & virtual Molex 78802 carrier
MEE2732
24-pin 2732 pinout
M4ROM
Version of Teeprom & Meeprom that uses a 29F010 flash instead of a 28C256 eeprom, and provides 4 32k rom images.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 1u | 000_LOCAL:C_0805 | C1 |
| 1 | 28C256 / FM18W08 | 000_LOCAL:SOIC-28W | U1 |
| 1 | 47k | 000_LOCAL:R_0805 | R1 |
| 1 | Molex 78805 socket with 27C256 pinout | 000_LOCAL:Molex78802_PCB_28 | J1 |
| 1 | Molex78802_PCB_28_Carrier | 000_LOCAL:Molex78802_PCB_28_Carrier | N1 |
The 5 most common of 8 parts.
bkw777/Teeprom
These are all virtual UV EPROMS / virtual mask roms, using electrically programmable EEPROM, FRAM, or FLASH with the pinout adapted to work in place of 27Cxx UV/OTP EPROMS or standard mask roms, on a specially shaped…
bkw777/Teeprom
These are all virtual UV EPROMS / virtual mask roms, using electrically programmable EEPROM, FRAM, or FLASH with the pinout adapted to work in place of 27Cxx UV/OTP EPROMS or standard mask roms, on a specially shaped…
ZigEmbeddedGroup/sycl-badge
The badge for the SYCL conference! https://zigembeddedgroup.github.io/sycl-badge/
bkw777/reQUAD
A modified respin of Steven Adolph's QUAD memory expansion for the TRS-80 Model 100
thewonderidiot/lachesis
Portable, safe readers for Apollo Guidance Computer core rope memory modules
It measures 38 × 16.6 mm and has 2 copper layers, 1.6 mm thick.
8 parts, built around the AT28C256-15SU and CL21B105KAFNNNE. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the bkw777/Teeprom repository on GitHub, at the commit this page was made from: the board is PCB/Meeprom.kicad_pcb and its schematic PCB/MEE2732.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).