Last time I spoke to him (3/3/05) he was still getting around to itemizing it all. Don't worry, if I get them I'll make sure all documentation is made...
Given the sudden interest in build a vz, I have scanned in my original circuit thoughts. If anyone is interested let me know and I'll put them up on the web....
I am interested. The other thing I'm keen on is building a simple IDE interface - well, the interface is the easy bit, especially if you only use 8 bits; what...
Check out LDOS for the TRS-80. Someone has patched it for use with IDE and it wouldn't be a huge stretch to make similar mods to VZ DOS. The big problem with...
Answers inline...... ... I'll upload them then. ... Nothing you can use as yet I'm afraid, its very specific to my custom hardware, plus its not complete :-( ...
... OK, do you actually have the 4M extended memory built? ... I was working on some sort of directory scheme with the first cylinder of the IDE drive, and the...
... Thanks for the heads-up on that one. I will check it out. ... Yeah, but with my 256K RAM expansion already built and the address and data lines easily...
Attached is a pic of the microbee case and keyboard I gutted yesterday...I hope building a new computer is as much fun as destroying one! I've bidded for a...
intertek
intertek@...
May 2, 2005 12:35 pm
4212
... I agree with you Andrew, for simplicity you must make some assumptions otherwise you'll get nowhere (like me). FYI: The largest native possible filesize...
... If you look around you can find source that supports the FAT file system in C. I think one of the Apple II IDE projects had it... if it works on a C...
... ruins to ... microbee is now ... If you want socketed parts stick with a CoCo 1 or know which version the machine is. I have a late model CoCo II and it...
... be more ... The 16 bit version requires buffering the top 8 bits of the IDE port. It's not very complicated and gives you the OPTION of supporting 16 bits...
... ruins to ... microbee is ... graphic ... The SAM chip doesn't support any graphics modes the 6847 doesn't. It just makes interfacing it easy. The SAM is...
... There was a guy on eBay selling EPROMs he pulled from devices then erased and tested them. He would program them for you if you sent him a file with the...
... The interaction between SAM and 6847 allows for a couple of strange (weird odd) semigraphics modes which aren't mentioned in the Motorola 6847 docs....
... Hmmm... I never really played with the semi-graphics modes more than a couple times so I guess I "assumed"... which we me all know what that means....
... http://www.atarimagazines.com/creative/v11n4/111_Tandy_gram_thirdparty_D.php I just broke the waranty seal on my CoCo II to check it out and the VDG and...
... Oh yeah... now I remember. I played with it a little with a product called Foxy Graph (which was a total waste of money). Semi-Graphics 8, 12 and 24. If...
... VDG and SAM are still socketed. Nothing else is. That's good news about the VDG anyway, I'd hate to try using a solder sucker and iron to extract it. Did a...
intertek@...
May 3, 2005 12:35 am
4226
I'll probably end up buying one of these, DSE sells a burner for $129 and 64k eproms for $12.95 The vz emulators are great for testing any software/rom...
intertek@...
May 3, 2005 12:57 am
4227
... It supports some different semi-graphics modes which are not "native". Not that I would use them but still its nice to look after the SAM chips when you...
... $129 and 64k eproms for $12.95 ... before burning! I think I spent under $25 for over 20 EPROMs + the programming + shipping. I looked up large Flash...
... altogether, ... standard. But I ... then all ... card ... Well... I'm suggesting an intermediate step that makes it possible to use the 6847 more like the...
... I found the TRS-80 interface for the General Instruments AY3-8910 and scanned it. I'm posting from the groups.yahoo.com web page and can't attach it....
... The NEC Trek is cool! It uses 512 bytes of RAM as "attribute memory" which is clocked into the mode and color set select lines when RAM is being read to...
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