In that case, I'm deleting 24MHz from the TODO list.
Thanks

Temperature sensor will be optional. Type of the display too (OLED or LCD, difference with backlight).

Turbo Led also can be a option? As I wrote previously: "using RGB LED (can be placed to the power led place), and using colors from the Enterprise logo: 2MHz blue, 4MHz green,6MHz yellow,8MHz orange,10MHz red."

Zozo, what about writing AMD or SST FlashRam, do they use the same protocol?

I working on a universal Flash software, for this I made a database of "probably EP compatible" Flash chips = 5V and 8bit

These can be categorized according to three main aspects:
-using 12 bit or 16 bit address decoding for the command addresses
-8 bit chips or 16 bit chips with 8 bit mode (using different addresses)
-programing type: sector based or page mode

The AMD/MX chips what I like using 12 bit decoding, then more easy the programing on Enterprise, enought the current segment paged in, command can be writed in segment.

The SST using 16 bit decoding, then 3 segment need to be paged in (or continously paging): the command addresses in a two different segment, and the target segment. But the advantage of SST using 4K sectors.
At the sector based Flash chips needed to erase whole sector before rewrite it. At the AMD/MX this is a 64K (at most of times). Soo if you want reprogram only one segment then needed to save the others to the memory, and write back after the erase.

Very nice!



Which DS1 and JTAG connectors will serve?

As the display tape connector comes forward to the user, the band cable can be output between the upper case and the keyboard case, just by the function keys stripe lid.

What is the thing at the top-right corner?

Suggested memory map.
I took into account the presence of the Microteam card, through with some modifications (removed right SRAM chip and all DRAM chips, are left Flash and left SRAM chip).

FlashROM 512KB (default configuration)
00-03: Flash bank 0 (EXOS)
20-23: Flash bank 1 (EXDOS)
30-23: Flash bank 2 (ZX Emulator) (right SRAM chip on the MICROTEAM card)
40-23: Flash bank 3 (DRAM chips on the MICROTEAM card)
50-23: Flash bank 4 (DRAM chips on the MICROTEAM card)
60-23: Flash bank 5
70-23: Flash bank 6
80-23: Flash bank 7

Alternative position for Flash bank 0: 08-0B
Alternative position for Flash bank 1: 0C-0F

RAM 2 x 1MB (RAM1 always onboard, RAM2 optionally):
3C-3F: RAM2 bank 12 (right SRAM chip on the MICROTEAM card)
44-47: RAM2 bank 1 (DRAM chips on the MICROTEAM card)
48-4B: RAM2 bank 2 (DRAM chips on the MICROTEAM card)
4C-4F: RAM2 bank 3 (DRAM chips on the MICROTEAM card)
54-57: RAM2 bank 5 (DRAM chips on the MICROTEAM card)
58-5B: RAM2 bank 6 (DRAM chips on the MICROTEAM card)
5C-5F: RAM2 bank 7 (DRAM chips on the MICROTEAM card)
64-67: RAM2 bank 9
68-6B: RAM2 bank 10
6C-6F: RAM2 bank 11
74-77: RAM2 bank 13
78-7B: RAM2 bank 14
7C-7F: RAM2 bank 15
B0-B3: RAM2 bank 0 (right SRAM chip on the MICROTEAM card)
B4-B7: RAM2 bank 4 (right SRAM chip on the MICROTEAM card)
B8-BB: RAM2 bank 8 (right SRAM chip on the MICROTEAM card)

BC-BF: RAM1 bank 15 (right SRAM chip on the MICROTEAM card)
C0-C3: RAM1 bank 0
C4-C7: RAM1 bank 1
C8-CB: RAM1 bank 2
CC-CF: RAM1 bank 3
D0-D3: RAM1 bank 4
D4-D7: RAM1 bank 5
D8-DB: RAM1 bank 6
DC-DF: RAM1 bank 7
E0-E3: RAM1 bank 8
E4-E7: RAM1 bank 9
E8-EB: RAM1 bank 10
EC-EF: RAM1 bank 11
F0-F3: RAM1 bank 12
F4-F7: RAM1 bank 13
F8-FB: RAM1 bank 14 (EP128 internal RAM expansion)

If there are any comments, please write under.

Thanks a lot Zozo.
I can use your configurations with no problem. They are even easier to implement.
Second as default.
I want to limit the number of jumpers on the card to a minimum. The entire configuration of settings will be remembered in NVRAM (or EEPROM).
I would like to always set the RAM1 in the same place (in the third version as well).
For RAM2, I predicted the possibility of not installing this chip on the card (here by the jumper).
In the case of RAM2 and Flash it will be possible to disable the bank (I hope that I will succeded accommodate as many registers in the CPLD).