I decided to use five[5] 8 bit ISA bus slot card edge connectors for the system bus this should be enough for most people who want to use the system.

We will be using 74LS logic to make the bus.
The chips used for this are:

74LS393
74LS157
74LS244
74LS245
74LS138
74LS139

Connect them in a manner consistent with making a system bus

Make a new sheet called bus if necessary

This project uses KiCAD 5.

Migration is necessary to either 6 and or 7.

For people who still have and or use KiCAD 5, stick the current files in a folder/directory so that its named appropriately and easy to locate

Because I was new to KiCAD and KiCAD 5, I did not do the PCB correctly

The board itself is 9.5" x 11" ATX size and is a minimum of 2 layers but easily could be 3 or 4.

It is also drilled to the same pattern that ATX uses for standoffs in a ATX case.

Make sure that the boards fit this form factor.

My target was PCBWay.

My goal is to start with 64k on board but extend the memory to 1MB via bank switching.

I think 1MB would be useful for most things like CP/M, etc.

The rest of the RAM will be on a 8 bit ISA card we will design.

A 74LS393 might be useful for this

I would like to use 4114s, 4116s, or 4164s fir this purpose.

Create a memory management system that uses this.

This section needs some attention.

This section uses:

74LS04 Hex Inverter
74LS08 Quad 2-input AND Gate
74LS32 Quad 2-input OR Gate
74LS273 Octal D-Type Flip Flop
74LS138 1-of-8 Decoder

HM62256BLP 256k SRAM (32-kword x 8-bit)
CY62256-70PC 256k SRAM (32-kword x 8-bit)
27C512 512k EPROM

After looking through examples on Google Image search of Z80 schematics, I wasn't quite clear on which SRAM's to use.
I also am not quite sure that this direction would be the way to go, but it seems these are common components to use with the Z80.

Serial:
DB9
RS232 DB15
RS232 DB19
RS232 DB25

Paralell:

Connectors:

The current schemas include several SRAMs, EPROMs, etc.

Ive made the decision to start with using 64k of 4164s and 27C/28C EPROMs

The EPROMs will have bootstrap/bootloader BIOS, a BASIC interpreter, a diagnostic ROM, etc.

I propose to use high & low ROMs when necessary to achieve this

Create schemas for the memory/RAM and ROM to achieve this, mostly on a separate schema labeled Memory