>Hello MSXFans, > >I have received yesterday a 7Mhz Kit and an IDE interface for my Sony >HBF700F. But I have few problems : > >7Mhz Kit : > >I bought it to Miri Software (very sympathic persons), but the doc's kit >seems to be for philips computers, it speaks of RS7 resistor in front of >the VDP, but I only have a RS307 resistor , is it the same ? > Before making changes to your precious MSX, you should be 100% sure of what you are doing: probably the Sony's RS307 resistor is something totally different than the Philips' RS7 !! As I've read below, you are experiencing displayproblems. I think it's due to these wrong modifications. I have a description for a 7MHz on both Sony and Philips: strange, but there is no comment about an RS7 or RS307 resistor... I was wondering: if you only have a description of a 'Philipsoperation', how did you make all other connections (like diskaccess, ...) ??? >I have (according to me) make all the connections well but it doesn't >accelerate anything (I might do something bad) did someone install this >kit on a sony hbf700f ? I use a kit from Gouda on a Philips8250. Works really good. I think many people will agree that the 7MHz kit is one of the most useful things they have ever bought. Anyway, if it's necessary, I can email you the translation of the Sony-operation. > >Now I have display problems, in text mode, when the screen scroll (in >fact when there is text on the last line) the text is jamming all over >the screen, have you ever had this problem ? I think it's obvious that this is caused by your 7MHz operation. Turn off your MSX immediately!! > >IDE interface : > >My harddisk is well recognized by the interface, I use FDISKIDE to >partition it. When I am back to MSXDOS, If I access to the hardisk >partition, I have a message saying me that the drive is not formatted so >I try to format it with FORMAT command but it tells me that he can't >format this drive. Can anybody help me on this subject. I experienced the same problems. Some tips: 1. The current IDEbios only works on MSX2/+ with harddisks that support LBA-mode (large block addressing). Only HD's bigger than 504MB support this feature. So, if your HD is not so big, it is useless. (I have the same problem, I'll buy a new HD in near future) 2. Is the drive's name ALWAYS displayed correct at startup? If not, then you should REMOVE the yellow resistorarray on the IDE-interface. (first destroy the array and then remove the remaining 'pins' with a soldering iron) Note the following: even if the drive's name is displayed correctly, this doesn't mean your HD supports LBAmode. 3.If previous conditions were met, your drive will probably work. Since I still haven't got a large HD, I'm not able to confirm this. But I know people with a working IDE on their MSX2. :) If previous conditions weren't met: the IDE seems to recognize your HD, also if you use FDISKIDE a normal looking partitiontable is autogenerated. BUT if you perform a 'write partitiontable' in the FDISKIDE-program, followed by a 'read partitiontable', your first autogenerated partitioninfo seems to have gone... So this is what happens when your HD is LBA-incompatible. I think you are experiencing this problem, right? Of course formatting, etc, won't work. (Although a drive A: seems to be created) Solution: buy a larger HD! > >Fabrice >**** Jon I had also a question: how can I make my MSX-Audio work on 7MHz. I've tried to disconnect the 7MHz clock from the cartridgeconnector and I replaced it by a remaining 3.58MHz clock I found inside the MSX. This seemed OK, but sometimes the sound is not as it should be. Probably the phasedifference of the CPUclock and of the 3.58MHz I use are not ok. I have no scope to check this out. I believe it is possible to make a circuit placed between the MSX and the MSX-Audio to divide the 7MHz in two or leave the clock if the MSX runs on 3.58MHz. Has anyone an idea how to make this?? Another hardwarerelated topic: in MCCM 88 and 89 (Dutch MSXmagazine) is described how to expand MSX-Audio sampleram to 256kB. The version in MCCM89 is the best one. Nevertheless the description contains a nasty misprint: at top right of page 57 you'll see ijha. This should be: ijka. You'll also need some information of MCCM88 about connecting the invertorgate. also a misprint in the text, though the diagram is ok. My audiosampleram works fine with this method. (Of course I tried the NOP-demo ;-) ) CU BTW I want to thank everyone who has replied to my emails about the IDE and DOS2.20 . Nevertheless the IDE still resets after putting a second mapper in the computer in DOS2 environment. So I went disassembling and I discovered: DOS2 writes to #8000 of each slot to test for RAM. This should be no problem, but the IDE seems to use also #8000 for programming the IDEbios. Is it allowed to write to each slot (even when restoring the value) ??? for example: writing to memoryarea above #7f00 in the diskromslot is not very safe... Are there any rules established concerning this matter? The search goes on... **** MSX Mailinglist. To unsubscribe, send an email to [EMAIL PROTECTED] and put in the body (not subject) "unsubscribe msx [EMAIL PROTECTED]" (without the quotes :-) Problems? contact [EMAIL PROTECTED] (www.stack.nl/~wiebe/mailinglist/) ****
