AIM65_FRAM
author: autotelic
2 layer board of 0.78 x 1.24 inches (19.9 x 31.6 mm)
Uploaded:
November 02, 2020
Shared:
November 09, 2020
Total Price:
$4.85
Nonvolatile FRAM memory replacement for 2332 ROM used by the Rockwell AIM-65. This board plugs into any of the 5 2332 AIM-65 ROM sockets. A lead to the 6502 R/W signal is needed for writing to the FRAM. A Write Protect switch allows disconnecting the R/W signal so that the FRAM truly behaves like a ROM. The FRAM is 8KB, and the 2332 is only 4KB. A switch selected whether A12 is pulled high or low, giving 2 banks of 4KB. A12 may also be tied to an I/O pin, such as from one of the 6522s, to allow programmatic bank selection. See github at: https://github.com/joebritt/AIM-65-FRAM
Nonvolatile FRAM memory replacement for 2332 ROM used by the Rockwell AIM-65. This board plugs into any of the 5 2332 AIM-65 ROM sockets. A lead to the 6502 R/W signal is needed for writing to the FRAM. A Write Protect switch allows disconnecting the R/W signal so that the FRAM truly behaves like a ROM. The FRAM is 8KB, and the 2332 is only 4KB. A switch selected whether A12 is pulled high or low, giving 2 banks of 4KB. A12 may also be tied to an I/O pin, such as from one of the 6522s, to allow programmatic bank selection. See github at: https://github.com/joebritt/AIM-65-FRAM
