HI there, good news !!!




Thanks to Kyp !!!

Happy 35 Enterprithday !! haaha
I love this machine.

Is possible when the development done, create new Nick and Dave chips which can be used for repair dead Enterprise machines?

Knowing the number of logical gates that each custom chip occupies, you could look for a cpld or fpga that has enough capacity and the necessary pins and could be mounted on a socket or an adapter.

What I couldn't tell you right now is how to take advantage of what is already in place, but I pass the question on to colleagues.

And to the question of whether it can, if the implementation actually meets all the requirements that the Enterprise needs, is YES.

After the improvements, the pseudo Nick says HELLO! and you already use the EXOS font

Hi there, fellows !

We have some progress, much more than we could expect. Our friend rampa069 has not given us time nor to assimilate all that he has already managed to do. Amazing !

Because the FPGA's SDRAM has 24 addressing bits, rampa069 has successfully reduced the Enterprise MMU in a very smart way. First 8 bits (Content of the port pointed to by the two high lines as a bank) +2 bits (The active port (B0, B1, B2, B3)) + 14 low bits of the address bus..., as soon as a Pseudo_NICK can start painting, there are a lot of possibilities that it will start working right away.

So, Kyp is redoing the control signals but since kyp uses a 28MHz master clock,  with clock enables it is more messy. There are a lot of clocks out of combinatorics and that doesn't like the FPGA. The advantage of FPGA implementations is that as milestones are achieved, you can start testing.

Now ROM loads OK, just using a EP128.ROM file at SD's root in where you can concatenate all ROMS you want. It loads from SD at address 0.-

Also the disc controller is working.




Surely tonight ramp069 will enable the Git and all the part already converted to EP128 will be deployed. More or less these are the news we have, it seems that everything is going faster than expected.



Best Regards
ron

To do a first approach to the core, I will try to explain what we plan to do.

There are two coders who do great things. They are Gyorgy (Gyurco aka slingshot) and Sorgelig. Both are among the most representative in MiST and MiSTer. Both have two separate Sam Coupé cores implemented.

Calm down, let's be calm. Yes, I said Sam Coupé. But I will explain what all this means. Everyone knows that the Enterprise is a better micro than the Sam Coupé. Enter is a design from 1983, Sam is almost 1989.

Isn't it strange to have the Sam Coupé instead of the Videoton as a base?. The Videoton is similar in software, but not in hardware, which is what it's all about here. We believe that Miles Gordon Technologies must have looked sideways at the Enterprise, because coincidentally, there are many circumstances that make it optimal to take advantage of what has already been done.

This is the Sorgelig's git: https://github.com/sorgelig/SAMCoupe_MIST
This is the gyurco ( slingshot) git: https://github.com/gyurco/SAMCoupe_MIST

Obviously the core of Enteprise once it is ready to implement Nick and Dave is not going to look anything like the original.

The rom is already loading it by ioctl_download to the sdram, paging to 16Kb blocks ... it is not so different ... with the appropriate changes we do not see any impediment to use them as a base on which to implement. It is a good start. From what we see the way of reading the keyboard is very similar to that of AY. About Dave, it's very similar. At The moment we have clear audio records, it will not be very difficult to prototype that chip and the paging based on outs is cpm type.

In a later phase it is a question of supplanting the ASIC of Sam by Nick and SAA by Dave.

It is an initial stage it is about prototyping until the nick is able to start generating and painting video. We have to see how far we can go, since in other cores the parts that were missing until the schemes were obtained or decapped, were based on what was written in emulators.

Feel free to comment and add what arouses your interest or points of view.

Regards
ron

Here is the post at RetroWiki in Spanish:
http://www.retrowiki.es/viewtopic.php?f=108&t=200035693

Saludos !

I do not know if it is the right place to continue talking about the USB to serial adapter for enterprise. Any way I would like to compile more information  and if it is possible to do something, it is very much appreciated.




Glorez brought this serial port to USB interface.
Last Friday and Sunday, we were in my workshop doing communications tests, with discrete results.

So we have not been able to find any communications program for Enteprise, except what has been done by the Danes. We have done tests from Basic, with results that we believe that with some adjustments we could do something.

Something like:

  100 PROGRAM "term.BAS"
  110 SET 191,4
  120 LET A$="":LET LOCAL=-1
  130 TEXT 80
  140 OPEN #1:"SERIAL:"
  150 IF LOCAL=-1 THEN PRINT #102:CHR$(27);"O";
  160 IF LOCAL=0 THEN
  170   GET #1:A$
  180 ELSE
  190   LET A$=INKEY$
  200 END IF
  210 IF A$<>"" THEN
  220   LET A=ORD(A$)
  230   IF A<>13 THEN
  240     PRINT CHR$(A);:PRINT #1:CHR$(A);
  250   ELSE
  260     LET LOCAL=NOT(LOCAL)
  270     IF LOCAL=0 THEN PRINT #102:CHR$(27);CHR$(111+(LOCAL*32));
  280     PRINT #1:CHR$(13);CHR$(10);:PRINT :LET A$=""
  290     IF LOCAL=-1 THEN PRINT #102:CHR$(27);CHR$(111+(LOCAL*32));
  300   END IF
  310 END IF
  320 GOTO 160

We have also been doing tests under IS-DOS and with the most common communications software for CP / M, but we are in the same point. It does not work.

Then, with IS-DOS there's the command MODE
MODE {[80] | [40]} | [Logical-device:=EXDOS-device]

Devices: [LST: , AUX:, RDR:, PUN:, NULL]

Well, all help and advice are welcome, the interface is working and with tcpser and minicom from Linux we can exchange characters between the PC and the Enterprise, there's a lot of test to do.

Regards