Mamlas Lite - RAM / CPU / AY module for ZX Spectrum 48/48+

Mamlas Lite is a replacement of SRAM and Z80 CPU  for Sinclair ZX Spectrum 48/48+ and Timex 2048. It also adds AY module to those machines. It also is able to generate ULA sound.

Features:

• mounted in place of CPU 
• replaces CPU and its 32KB RAM 
• TTL based design
• AY 3-8910 chip on-board
• new Z80 CPU in TQFP44 packaging 
• ULA sound is sent on both audio channels 
• Audio out is provided using 3 pins header (left channel / ground / right channel)

Disclaimer: 

If you are not familiar with soldering or you do not have proper tools, we can install the expansion for you. Please contact us to arrange installation.

If you are installing the device yourself, we will not take any responsibility for any damage to your hardware and the device will NOT be subject of any kind of warranty.

Installation:

1. Remove old 32KB RAM chips (or disable them - easiest way is  to connect CAS signal present on DRAM chips to 5V)
2. Remove original CPU and its socket if present
3. Insert module into CPU's place ensuring appropriate pin 1 orientation
4. Solder Mamlas Lite into the motherboard
5. Connect audio out from 3 pin header to jack or RCA sockets - your choice is where to drill the case

CAS signal is present on:

• pin 15 of 1bit memory chips (8 pieces on the motherboard)
• pin 16 of 4bit memory chips (2 pieces on the motherboard)

Please note:

• Mamlas Lite will not fit into ZX Spectrum 48 and Timex 2048, unless soldered into motherboard without the socket
• Device is delivered with bottom socket for protection only - do not use it. Remove bottom socket very carefully without damaging or bending precise pins.
• Audio connectors are not supplied
• Some extra bending of metal radiator is needed in ZX Spectrum 48, so device can fit under.