External Memory and DAC and RTC

In Development:

One Meg External Memory. EDDAC and DALLAS Clock.

Chips on prototype:

2 x Alliance Memory SRAM, AS6C4008-55PCN- 4Mbit

1 x DS12887+ RTC IC, Date Time Format (Day/Date/Month/Year 12Hr / 24Hr), Multiplexed, 4.5 V to 5.5 V, DIP-24 due to be replaced with Maxim Integrated DS12885S+, Real Time Clock, 144B RAM Multiplexed, 24-Pin SOIC with external battery

2 x Control chips - due to be replaced with Microchip ATF1502ASL-25JU44, CPLD ATF1502ASL EEPROM 36 I/O, 32 Labs, 25ns, ISP, 44-Pin PLCC

2 x Other chips

Production version is due to have a through port for another expansion device.