Re: [N8VEM-S100:699] Re: S-100 VDP prototype board PCBs are here

[Max Scans <mjs...@gmail.com>]

Hi Neil,  I think the N8 was the other board you were referring to

Cheers,

Max

Sent from my iPhone

On 09/02/2012, at 10:42 AM, "Neil Breeden" <nbre...@comcast.net> wrote:

> The FMS6141 is a video filter, as I recall you can leave it off and go with
> the 2N3904 based amp instead, it needs to be one or the other, not both.
> 
> I ordered the 6141 from Digikey -
> http://search.digikey.com/us/en/products/FMS6141CSX/FMS6141CSXCT-ND/1305865
> 
> 
> Note that I have NOT verified the info below, it is based on looking at the
> schematic.
> 
> If you use the FMS6141 I believe these other parts are needed as well:  
> 
> P36 FMS4161
> R28 0 Ohm (wire jumper)
> R29 470 Ohm
> C24 0.1uF
> R30 75 Ohm
> R31 75 Ohm
> C26 220uF
> C27 0.1uF
> Jumper L1 (this will supply VCC to the FMS6141) or use an Inductor bead to
> limit noise back onto VCC
> 
> If you are not using the FMS4161 then you will also need:
> 
> Q1 2N3904
> C25 22uF
> L1 Inductor Bead
> 
> Again this is a guess based on what I see in the schematic; there was a
> discussion some time ago on another thread about a similar design on another
> board; I haven't been able to find that discussion however.
> 
> -Neil
> 
> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
> Behalf Of Elsid
> Sent: Wednesday, February 08, 2012 12:53 PM
> To: N8VEM-S100
> Subject: [N8VEM-S100:698] Re: S-100 VDP prototype board PCBs are here
> 
> When I checked my parts for the VDP I discovered I'd forgotten the
> FMS6141 IC.
> There doesn't seem to be anything available locally that will do the job.
> It'll take about a week to come in from RS Components. I know they are a bit
> pricey, but they don't have a minimum order for their free delivery if you
> order online in Australia, unlike Element 14 or XON(Mouser agents) or
> Digikey. (I don't have any association with RS)
> 
> Leon
> 
> On Feb 8, 8:08 am, Elsid <le...@swiftdsl.com.au> wrote:
>> Hi Neil,
>> 
>> I think I have most if not all of the parts for the VDP now.
>> I will most likely build the board this weekend.
>> What were you going to try as far as software?
>> I thought I'd try building a text driver for CP/M 3 first, though it 
>> would be nice to see MSX running on an S-100 machine.
>> 
>> Leon
>> 
>> On Feb 8, 4:37 am, "Neil Breeden" <nbre...@comcast.net> wrote:
>> 
>> 
>> 
>>> I'm wondering who else is testing / building an S-100 VDP board?
>> 
>>> I have my board assembled and all the parts in hand with the 
>>> exception of one part, the 1.2V zener/voltage reference. Nobody in 
>>> my area stocks the voltage reference listed in the schematic, I'm 
>>> waiting to get an order above the minimum on Digikey so I can kick off
> an order.
>> 
>>> -Neil
>> 
>>> From: n8vem...@googlegroups.com 
>>> [mailto:n8vem...@googlegroups.com] On Behalf Of Andrew Lynch
>>> Sent: Thursday, December 29, 2011 4:35 PM
>>> To: n8vem...@googlegroups.com
>>> Subject: [N8VEM-S100:634] S-100 VDP prototype board PCBs are here
>> 
>>> Hi!
>> 
>>> I've already sent S-100 VDP prototype board PCBs to Dave and Neil 
>>> for build and test.
>> 
>>> However if anyone else would like to participate in the build and 
>>> test phase please let me know.
>> 
>>> This is going to be a fun project and has the potential for somewhat 
>>> VGA compatibility.
>> 
>>> It also lays the foundation for a potential MSX2 compatibility for 
>>> the S-100 bus.
>> 
>>> That's unprecedented AFAIK.  It could be very interesting!
>> 
>>> It is not recommended for new builders though -- this will be "blood 
>>> and guts" all the way!
>> 
>>> Thanks and have a nice day!
>> 
>>> Andrew Lynch- Hide quoted text -
>> 
>> - Show quoted text-
>