====== Upgrade RC2014Mini to run CP/M2.2 ======

===== Introduction =====

This is a step-by-step guide for upgrading a RC2014 Mini so it can run CP/M 2.2.

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===== Materials required =====

The following are needed to perform the upgrade:

  * 28-pin 600-mil wide socket
  * 128Kx8 RAM, AS6C1008, TC551001, or KM681000
  * MCP130-460DI voltage supervisor
  * W27C512 EEPROM
  * 14.7456MHz full-size oscillator
  * Compact Flash board I/O address strapped to 0x10 to 0x17

===== 64K RAM Upgrade =====

Remove the 32K RAM, AS6C62256 from its socket. The upgraded RAM is a 128Kx8 RAM such as AS6C1008, TC551001, or KM681000) which is a 32-pin device. The 32-pin device is larger than the existing space can accommodate so it needs to be mounted on a 28-pin socket that, in turn, plugs into the existing 28-pin socket so the extra 4 pins hang over the socket and above the Z80 CPU. The following is modification to the 128Kx8 RAM and its socket:

  * Connect pin 2 of 128Kx8 RAM to pin32 of RAM,
  * Connect pin 32 of RAM to pin 30 of the socket
  * Cut off the skinny leg portion of pin 22 and straighten out the remaining lead so it won't touch the socket; connect a wire from the remaining lead to ground (pin 16) of RAM.
  * Connect pin 22 of the socket to pin 31 of RAM
  * Cut off the skinny leg portion of pin 30 and straighten out the remaining lead so it won't touch the socket; connect a wire to the remaining lead and leave it unconnected for now.

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  * Insert the RAM along with its socket in the original 28-pin RAM socket. Pin 1,2, 31,32 of the RAM should hang over the Z80 CPU
  * Thread the uncommitted wire (connected to pin 30 of RAM) through the center hole of the RC2014Mini pc board to the solder side; connect to pin 11 of U1

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===== 16K ROM Upgrade =====

===== Add ROM-to-RAM paging circuit =====

===== CPU Clock Upgrade =====

===== CF Card =====

===== Software =====

{{:builderpages:plasmo:rc2014mini_upgrade:minimon.zip|MiniMon}}, Simple monitor for RC2014 Mini

CP/M2.2, CPM BDOS/CCP/BIOS for MiniMon

===== Manual =====

MiniMon operating guide

Installing CP/M in a new CF disk