and yes I'd prefer another quad but those haven't been available for a while :)
On Wed, Mar 14, 2018 at 10:22 AM, Gregory McGill <[email protected]> wrote: > thanks! It seems like we should be able to use the 8x8 chip from the 102 > with some kludging of lines.. they are pretty close.. > > Greg > > On Wed, Mar 14, 2018 at 10:08 AM, Brian White <[email protected]> wrote: > >> There are at least a few different "build your own ram upgrade" articles >> on club100 and other archives of old forum posts, and in magazines too I >> think but those are hard to search. >> >> Here's one that is not one of the old original ones I was thinking of, >> but looks ok. >> >> http://digilander.libero.it/rar2k/TRS80/Memory24k.html >> >> I have some NEC modules that work that I assume must have originally been >> meant for nec 8201a. They are a little pcb with a single ram chip and an >> additional chip probably a decoder of some sort to consume 4 chip-enable >> lines. I could take some photos of it and maybe it's circuit could be >> reverse engineered from that. >> >> https://photos.app.goo.gl/ZQle2id7AMWdX2bC3 >> >> Another option is QUAD, which is a thing that installs in the bus socket >> and displaces the internal ram with it's own full 32K, plus 3 more banks of >> 32K that you can switch between. Although you can't get a quad right now. >> Steven Adolph is testing his latest revision of the design and it's in >> between right now. He found problems with the old version and so removed it >> from oshpark, and th new version is not yet verified. >> >> But assuming that comes along sooner or later, that would upgrade you to >> 32K the same as if you had installed all 4 possible modules inside. >> >> -- >> bkw >> >> >> >> On Wed, Mar 14, 2018, 11:14 AM Gregory McGill <[email protected]> >> wrote: >> >>> ok is there a source for the 100 chips? or a pcb? >>> >>> Greg >>> >>> On Wed, Mar 14, 2018 at 12:02 AM, Fugu ME100 <[email protected]> >>> wrote: >>> >>>> Just the 102, it uses a standard pin out. The 100 uses a special RAM >>>> module. >>>> >>>> From: M100 <[email protected]> on behalf of Gregory >>>> McGill <[email protected]> >>>> Reply-To: <[email protected]> >>>> Date: Tuesday, March 13, 2018 at 10:58 PM >>>> To: <[email protected]> >>>> Subject: Re: [M100] 8K RAM Chip >>>> >>>> oh wait these are 32x8 :) are these ones on ebay for the 100 or 102? >>>> or both? >>>> >>>> Greg >>>> >>>> On Fri, Mar 9, 2018 at 7:33 PM, Gregory McGill <[email protected] >>>> > wrote: >>>> >>>>> if you have the pinouts I have a bunch of 8x8 srams around for TI99 >>>>> projects >>>>> >>>>> Greg >>>>> >>>>> On Fri, Mar 9, 2018 at 6:11 PM, Ken Pettit <[email protected]> wrote: >>>>> >>>>>> Ahh, I see now the original email stated 102. So yeah, those will >>>>>> work. >>>>>> >>>>>> Ken >>>>>> >>>>>> >>>>>> On 3/9/18 6:09 PM, Fugu ME100 wrote: >>>>>> >>>>>>> More if it was R/S :) >>>>>>> >>>>>>> This is the one >>>>>>> https://www.ebay.com/itm/1-TOSHIBA-TC5565PL-15-64K-8Kx8-SRAM >>>>>>> -CMOS-STATIC-RA >>>>>>> <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ebay.com%2Fitm%2F1-TOSHIBA-TC5565PL-15-64K-8Kx8-SRAM-CMOS-STATIC-RA&data=02%7C01%7C%7C96a3aaaefa374c53deac08d58970ab2a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636566039350646620&sdata=TK1b2KzBAUixcShsDPDAlwUiZAgII%2BTVKFPFUHY9Qww%3D&reserved=0> >>>>>>> M-5V-150NS-28-PIN-PDIP/321974484773?hash=item4af72cbf25:g:ld >>>>>>> EAAOSwGotWlWd9 >>>>>>> you mean? >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 9/3/18, 6:07 PM, "M100 on behalf of Peter Vollan" >>>>>>> <[email protected] on behalf of [email protected] >>>>>>> > >>>>>>> wrote: >>>>>>> >>>>>>> Wow, a quick check reveals a 8kX8 SRAM on ebay for $3. Didn't those >>>>>>>> "memory modules" cost about $30? >>>>>>>> >>>>>>>> >>>>>>>> On 9 March 2018 at 17:57, Chris Kmiec <[email protected]> wrote: >>>>>>>> >>>>>>>>> Great, I'll go looking on the intrawebs :) >>>>>>>>> >>>>>>>>> You don't happen to have another REX, do you? :) >>>>>>>>> >>>>>>>>> Chris >>>>>>>>> >>>>>>>>> On Fri, Mar 9, 2018 at 7:01 PM, Fugu ME100 <[email protected]> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> The chips are available they are standard 8Kx8 SRAM. Should be >>>>>>>>>> able to >>>>>>>>>> find some on line. >>>>>>>>>> >>>>>>>>>> Unfortunately the QUAD is only for the Model 100, it will not fit >>>>>>>>>> the >>>>>>>>>> 102. >>>>>>>>>> >>>>>>>>>> Congratulations on your new addition :) >>>>>>>>>> >>>>>>>>>> From: M100 <[email protected]> on behalf of >>>>>>>>>> Chris Kmiec >>>>>>>>>> <[email protected]> >>>>>>>>>> Reply-To: <[email protected]> >>>>>>>>>> Date: Friday, March 9, 2018 at 4:33 PM >>>>>>>>>> To: <[email protected]> >>>>>>>>>> Subject: [M100] 8K RAM Chip >>>>>>>>>> >>>>>>>>>> Are these available anywhere, or do I have to find a donor >>>>>>>>>> system? Just >>>>>>>>>> got a like-new 102, but no memory expansion. >>>>>>>>>> >>>>>>>>>> I'm assuming QUAD is no longer being made/sold? >>>>>>>>>> >>>>>>>>>> Thanks! >>>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> On Mar 14, 2018 11:14 AM, "Gregory McGill" <[email protected]> >> wrote: >> >> ok is there a source for the 100 chips? or a pcb? >> >> Greg >> >> On Wed, Mar 14, 2018 at 12:02 AM, Fugu ME100 <[email protected]> wrote: >> >>> Just the 102, it uses a standard pin out. The 100 uses a special RAM >>> module. >>> >>> From: M100 <[email protected]> on behalf of Gregory >>> McGill <[email protected]> >>> Reply-To: <[email protected]> >>> Date: Tuesday, March 13, 2018 at 10:58 PM >>> To: <[email protected]> >>> Subject: Re: [M100] 8K RAM Chip >>> >>> oh wait these are 32x8 :) are these ones on ebay for the 100 or 102? or >>> both? >>> >>> Greg >>> >>> On Fri, Mar 9, 2018 at 7:33 PM, Gregory McGill <[email protected]> >>> wrote: >>> >>>> if you have the pinouts I have a bunch of 8x8 srams around for TI99 >>>> projects >>>> >>>> Greg >>>> >>>> On Fri, Mar 9, 2018 at 6:11 PM, Ken Pettit <[email protected]> wrote: >>>> >>>>> Ahh, I see now the original email stated 102. So yeah, those will >>>>> work. >>>>> >>>>> Ken >>>>> >>>>> >>>>> On 3/9/18 6:09 PM, Fugu ME100 wrote: >>>>> >>>>>> More if it was R/S :) >>>>>> >>>>>> This is the one >>>>>> https://www.ebay.com/itm/1-TOSHIBA-TC5565PL-15-64K-8Kx8-SRAM >>>>>> -CMOS-STATIC-RA >>>>>> <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ebay.com%2Fitm%2F1-TOSHIBA-TC5565PL-15-64K-8Kx8-SRAM-CMOS-STATIC-RA&data=02%7C01%7C%7C96a3aaaefa374c53deac08d58970ab2a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636566039350646620&sdata=TK1b2KzBAUixcShsDPDAlwUiZAgII%2BTVKFPFUHY9Qww%3D&reserved=0> >>>>>> M-5V-150NS-28-PIN-PDIP/321974484773?hash=item4af72cbf25:g:ld >>>>>> EAAOSwGotWlWd9 >>>>>> you mean? >>>>>> >>>>>> >>>>>> >>>>>> On 9/3/18, 6:07 PM, "M100 on behalf of Peter Vollan" >>>>>> <[email protected] on behalf of [email protected]> >>>>>> wrote: >>>>>> >>>>>> Wow, a quick check reveals a 8kX8 SRAM on ebay for $3. Didn't those >>>>>>> "memory modules" cost about $30? >>>>>>> >>>>>>> >>>>>>> On 9 March 2018 at 17:57, Chris Kmiec <[email protected]> wrote: >>>>>>> >>>>>>>> Great, I'll go looking on the intrawebs :) >>>>>>>> >>>>>>>> You don't happen to have another REX, do you? :) >>>>>>>> >>>>>>>> Chris >>>>>>>> >>>>>>>> On Fri, Mar 9, 2018 at 7:01 PM, Fugu ME100 <[email protected]> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> The chips are available they are standard 8Kx8 SRAM. Should be >>>>>>>>> able to >>>>>>>>> find some on line. >>>>>>>>> >>>>>>>>> Unfortunately the QUAD is only for the Model 100, it will not fit >>>>>>>>> the >>>>>>>>> 102. >>>>>>>>> >>>>>>>>> Congratulations on your new addition :) >>>>>>>>> >>>>>>>>> From: M100 <[email protected]> on behalf of Chris >>>>>>>>> Kmiec >>>>>>>>> <[email protected]> >>>>>>>>> Reply-To: <[email protected]> >>>>>>>>> Date: Friday, March 9, 2018 at 4:33 PM >>>>>>>>> To: <[email protected]> >>>>>>>>> Subject: [M100] 8K RAM Chip >>>>>>>>> >>>>>>>>> Are these available anywhere, or do I have to find a donor system? >>>>>>>>> Just >>>>>>>>> got a like-new 102, but no memory expansion. >>>>>>>>> >>>>>>>>> I'm assuming QUAD is no longer being made/sold? >>>>>>>>> >>>>>>>>> Thanks! >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>> >>>>> >>>> >>> >> >> >
