Re the main ROM I was wondering whether it's socketed a la M100 or soldered like the T102; sounds like it's socketed.
Re the option ROM I was wondering whether the same OUT command as in the 100/102 switches it in and out; I should be able to glean that from the schematic. Thanks. ----- Original Message ----- From: "Brian K. White" <b.kenyo...@gmail.com> To: <m...@bitchin100.com> Sent: Friday, March 13, 2020 2:39 PM Subject: Re: [M100] T-102 is here! > 200 option rom is the same socket and same pinout. > > But the main rom isn't just a 27C256. There is a 2nd chip also for > something like 40 KB total. But I don't know more than that so maybe the > 32KB main rom can still be considered like any other single chip main > rom and the extra 8k is fully separate application code (Multiplan), or > maybe there is code mixed across both chips. > > That still wouldn't prevent doing a date patch on just one chip if you > didn't change anything else, and if both date digits were in the same chip. > > But for instance the REX main rom feature docs show how it's more > complicated to disable the main rom and take over it's function, as you > have to disable 2 chips and watch 2 /CS lines that used to go to them. > This probably explains why 200 ram banks are only 24K max, not 32. > > -- > bkw > > > On 3/13/20 2:23 PM, Mike Stein wrote: >> >> Yeah, I was just wondering whether it's in a socket and if the option >> ROM mechanism is the same; sounds like yes? >> >> ----- Original Message ----- >> *From:* Kurt McCullum <mailto:ku...@fastmail.com> >> *To:* m100@lists.bitchin100.com <mailto:m100@lists.bitchin100.com> >> *Sent:* Friday, March 13, 2020 2:06 PM >> *Subject:* Re: [M100] T-102 is here! >> >> T200 is a standard 27C256 ROM. I did a patch on mine before I sold it. >> >> On Fri, Mar 13, 2020, at 10:51 AM, Mike Stein wrote: >>> >>> There's at least one solution for the two versions of the M100 >>> that lets you both add TS-DOS in ROM and also patch the main ROM >>> with the Y2K and a couple of other fixes. >>> >>> Unfortunately in the T102 it requires unsoldering the system ROM, >>> not something everyone's keen or comfortable doing. >>> >>> I've never looked at the T200 to see what It would require. >>> >>> m >>> >>> ----- Original Message ----- >>> *From:* Tom Wilson <mailto:wilso...@gmail.com> >>> *To:* m...@bitchin100.com <mailto:m...@bitchin100.com> >>> *Sent:* Friday, March 13, 2020 1:07 PM >>> *Subject:* Re: [M100] T-102 is here! >>> >>> file transfer software is at the top of my list. Is TS-DOS the >>> best option? Are there any really useful modern custom ROMs >>> that add fixes or features, like the Y2K century fix? >>> >>> >>> On Fri, Mar 13, 2020 at 9:48 AM Mike Stein >>> <mhs.st...@gmail.com <mailto:mhs.st...@gmail.com>> wrote: >>> >>> __ >>> Just curious: what option ROMs do you want to use? >>> >>> ----- Original Message ----- >>> *From:* Tom Wilson <mailto:wilso...@gmail.com> >>> *To:* m...@bitchin100.com <mailto:m...@bitchin100.com> >>> *Sent:* Friday, March 13, 2020 12:40 PM >>> *Subject:* Re: [M100] T-102 is here! >>> >>> >>> Yes, I’ve got a Rex in order. I also have a Model 200 >>> on the way. So I’m trying to decide whether to get >>> another Rex. I got a smoking deal on both this >>> computer and the 200, and the Rex actually costs more >>> than the computer. >>> >>> I’ll probably go ahead and get a second Rex, but i was >>> hoping for something a little less expensive for a >>> machine that will likely sit on the shelf and look >>> pretty 90% if the time. >>> >>> >>> On Fri, Mar 13, 2020 at 8:43 AM Gregory McGill >>> <arcadeshop...@gmail.com >>> <mailto:arcadeshop...@gmail.com>> wrote: >>> >>> rex is available at arcadeshopper.com >>> <http://arcadeshopper.com> for that option rom socket >>> >>> Greg >>> >>> >>> -- >>> >>> Tom Wilson >>> wilso...@gmail.com <mailto:wilso...@gmail.com> >>> (619)940-6311 >>> K6ABZ >>> >>> -- >>> >>> Tom Wilson >>> wilso...@gmail.com <mailto:wilso...@gmail.com> >>> (619)940-6311 >>> K6ABZ >> > > > -- > bkw
