Laurens, I want exted more and explain right over the concept involving in me Design Achitecture as one FAQ questionarie (part 2): OVER LPE-Z380-V2. Q: What type is the control HW ? A: Have 2 Flash CPLD (2500 PLD Gates equivalent), for reprograming. Q: What HW Architecture have ? A: Equivalent to one L1 (level 1) computer. Q: Is possible replace the Z80 of the internal MSX with th Z380? A: Yes. But no is interesting for use the I/O directly for the Z380. Let to Z80 maneging the I/Os. Is easy make power games/aplications whit Z80 working as server (boosting >600%). This is the cartridge mode. OVER EVOLUTION4. Q: What signals is contened in the Bus ? A: they are 50 contacts as MSX standard in the central part. Pin 5 used as /BREQ, 46 /BACKI, 44 /BACKO thees for DMA and pin 16 for Adress Mux for 48 total address lines. The DMA is ZBUS type. They are 8 contacts at the right for use as Slots Rail. And they are too 16 for 8 added addres lines plus 8 data lines at the left. Please see the Spanish Hnostar Magazine number 39 from 1.997 page 29. Q: Is possible put all memory system of MSX in one single card with the same slots disposition (RAM, ROMS) ? A: Yes, Use the Slots Rail for this. Q: Is ready for suport IOSLOTS ? A: Yes Q: What type is the control HW ? A: Flash CPLD (5000 PLD Gates equivalent), with JTAG port included on board for reprogramig. OVER LPE-Z380-V2 + EVOLUTION4 + MSX. Q: Is posible use here the Z380 in cartridge mode ? A: Yes Q: Is MSX 100 % compatible ? A: Of course. Because your MSX HW/SW system is included. Q: Is the cars passed to the expansor MSX 100 % compatible ? A: Of course. Because you traslate only of position the MSX HW/SW. When you had traslated all including the ROMs you run with Z380 all with the same ROMs. Q: How is implemented the mapper ? A: The slots leng from 1G to 16K is chaged in the Z380 card togle one bit in the F3h card internal register. The mapper mush be included in memory car for plug in the expansor. This memory togle mapped/linear togling one bit too. Q: The Z380 can drive alternaty with MSX Z80 the cards pluged in the expansor boosting the games/aplications ? A: Of course. But before you mush enable Halted the internal microprocesor, for it put one pull up resistor 4K7 in the Z80 (pin 25) BREQ and solder one cable betwin it and pin 5 of edge conector of your MSX, and other connection form BACK (pin 23) to pin 46 for be acknoled in the expansor. OVER ME COLABORATION WITH OTHER CARDS MAKERS. Q: Is possible now the colaboration for make one new mainboard MSX3 Style ? A: No. I think we mush evolutionig at minimum cost the actual system first, using old cards, and see the results. And the other hand the cost of development for one complete main board is very high, long time for finish with great risk to appear in 2005 as soon, and only affordable for multinational enterprises as Philips or Sony now non interested. And when finished it, will be acepted by the MSX community ?. Will be the VDP then at your taste ?.We mush be modest. Q: Is possible the colaboration for traslate SW/HW to card for EVOLUTION4 adding DMA, IOSLOTS, INT..prove ? A: Yes Q: Is possible the colaboration for redesingner old card for EVOLUTION4 adding DMA, IOSLOTS, INT..? A: Yes **** MSX Mailinglist. To unsubscribe, send an email to [EMAIL PROTECTED] and put "unsubscribe msx [EMAIL PROTECTED]" (without the quotes) in the body (not the subject) of the message. Problems? contact [EMAIL PROTECTED] More information on MSX can be found in the following places: The MSX faq: http://www.faq.msxnet.org/ The MSX newsgroup: comp.sys.msx The MSX IRC channel: #MSX on Undernet ****
