The Z50Bus has been developed by LiNC and originally used on the LiNC80 SBC1. Details of the Z50Bus can be found here.

Most of my Z50Bus cards are made to these dimensions.

Input/output addresses

These address uses have been discussed with LiNC but are not official stated policy.

I/O Address	Use (General)
0x00 to 0x3F	Processor card, or SBC, or Motherboard, and cards operating specifically with these devices
0x40 to 0x4F	Available to third party vendors
0x50 to 0x5F	Available to third party designs/vendors Alternative addresses for LiNC cards
0x60 to 0x7F	Specialist cards where address clashes are not likely
0x80 to 0xAF	Core cards with well-specified functions Vendors are encouraged to map compatible cards here
0xB0 to 0xBF	Available to third party vendors
0xC0 to 0xDF	Available to third party vendors
0xE0 to 0xFF	User’s own designs (suggested addresses) Do not use for products that are to be sold

Input/output address usage by LiNC products

I/O Address	Use (General)
0x00 to 0x2F, and 0x38 to 0x3F	LiNC80 SBC1
0x20 to 0x37	Reserved for LiNC add-ons
0x40 to 0xFF	Free for expansion devices

I/O Address	Use (LiNC80 SBC1)
0x00 to 0x03 0x04 to 0x07 echo	SBC1′ s Z80 SIO
0x08 to 0x0B 0x0C to 0x0F echo	SBC1’s Z80 CTC
0x10 to 0x17	SBC1’s 8-bit IDE for Compact Flash
0x18 to 0x1B 0x1C to 0x1F echo	SBC1’s Z80 PIO
0x38 0x39 to 0x3F echo	Configuration register

LiNC Z50Bus cards when used with LiNC80 SBC1:

I/O Address	Use (Z50Bus cards)
0x30	Default for digital I/O card
0x32 to 0x33	Default for AY/YM sound card

LiNC Z50Bus cards, alternative addresses:

I/O Address	Use (Z50Bus cards)
0x52	Default for digital I/O card
0x??	Default for AY/YM sound card

I/O addresses used by some early third party products

I/O Address	Use (SC118, Z80 processor)
0x08 to 0x3B	SC118’s status LED
0x20 to 0x23	SC118’s serial RTS output
0x28 to 0x2B	SC118’s serial TXD output
0x28	SC118’s serial RXD input
0x30 to 0x33	SC118’s memory A16 output
0x38 to 0x3B	SC118’s RAM select output

I/O Address	Use (Z50Bus cards)
0x10 to 0x17	SC127 #1, Compact Flash
0x80 to 0x83	SC125 #1, Z80 SIO
0x84 to 0x87	SC125 #2, Z80 SIO
0x88 to 0x8B	SC125 #1, Z80 CTC
0x8C to 0x8F	SC125 #2, Z80 CTC
0x90 to 0x97	SC127 #2, Compact Flash

In addition, the more recently released SC500 series is described here.