Guys, just FYI, Andrew and I have quite a number of new boards coming this year. There are a few V2 versions of older boards as well. On the latter, while 90% of the components are the same, the layout is often different - offering more options/capability. Most are in final stages currently and represent a fair amount of work. For example the V2-80286 is on its 6th prototype. I have just finished this one, see the video here:-
http://s100computers.com/My%20System%20Pages/80286%20Board/80286%20CPU%20Board.htm#V2 of 80286 Board (BTW, It’s probably the most complex S-100 board Andrew and I have done to date. Was in fact way more difficult than a prototype 80386 we have ongoing, but now this 80286 looks rock solid). Anyway, my point is that there will not only be a lot of boards but some will be fairly sophisticated and probably not for everyone. Some owners will not, or need not, upgrade. So some boards will probably not reach a 20 number threshold and so will be more expensive. This will create even more headaches for “board champions”. In some case it may in fact make sense to order boards directly for one’s own use. I always get 3 of everything, don’t know how many times a duplicate board saved my skin debugging! John From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Lynch Sent: Thursday, February 6, 2014 4:00 PM To: [email protected] Subject: RE: [N8VEM-S100:2337] Re: accepting pre-orders for the S-100 Z80 CPU V2 board Hi Normally a batch of 30 new PCBs costs around $550 to $600 US. There is a small margin if everything works perfectly. It never does though so the margin fills in the gaps like broken and missing boards, unexpected expenses, packing tape, mailers, and the like. Thanks and have a nice day! Andrew Lynch From: [email protected] [mailto:[email protected]] On Behalf Of David Fry Sent: Thursday, February 6, 2014 2:58 AM To: [email protected] Cc: [email protected]; [email protected] Subject: [N8VEM-S100:2328] Re: accepting pre-orders for the S-100 Z80 CPU V2 board Hi Andrew, Adopt a board, Mmm that could work too.. Could you give us some idea of what the costs would be up front to order and sit on a batch of 10, 20 or 50 boards etc.. I'm guessing that people may adopt boards thay actually need so I may be interested in adopting the ZFDC or the MSDOS support board, just need to know the costs before committing as I dont have a regular job. regards David Fry regards On Sunday, January 5, 2014 8:39:03 PM UTC, lynchaj wrote: Hi! We are about to do another run of our popular S-100 Bus Z80 CPU V2 board. This board can run in systems (with bus termination etc.) at up to 10MHz. Apart from all the then common features found on many older S100 Z80 boards (and being completely S-100 IEEE-696 compliant), it had an extremely clever and powerful ability to allow the Z80 to address up to 1 MG of RAM in 16K "windows" within the Z80's address space. This is described here:- http://www.s100computers.com/My%20System%20Pages/Z80%20Board/Z80%20CPU%20Board.htm Its primary importance is that it can be used to address greater than 64K of RAM for CPM3 and that it can be used to load/examine 8086 code at the top of the 1MG address space. The new “V2” version of the board now has the ability to (under software control) dynamically switch between two 4K blocks of code in its onboard 28C64 EEPROM (or EPROM) yet still only occupy 4K in the Z80’s 64K memory space. This in effect almost doubles the size of a possible Z80 monitor. The extra code (currently being written) will include things like directly downloading binary files from a PC into the Z80’s 64K (or 8086’s 1M) address space. In addition, the S-100 Z80 CPU V2 has the ability to use an external CPU clock from an external source (S-100 bus pin 66 aka NDEF3). This is essential for CPU to video synchronization for MSX compatibility particularly in games. There will be a corresponding ability to export a CPU clock signal on the next version of the S-100 VDP board although this could come from any S-100 board. Current owners of the V1 board can just switch the IC’s to this new bare board. The S-100 Z80 CPU V2 PCBs will be $20 each as per the usual arrangement. Shipping in the US is $3 for a single PCB and $2 for each additional PCB. Shipping internationally is $12.75 for a single PCB and $3 for each additional PCB. This is for the bare basics USPS first class postage with no tracking or insurance. The builder assumes all risk of delivery as per usual arrangement. My preference is to sell these PCBs to vintage computer/home brew computer/classic computer hobbyists first but if there are any remaining boards I will put them on eBay. Please send a PayPal to [email protected] <javascript:> with the subject “S-100 Z80 CPU V2 board” and I will reserve your board(s). I need about 20 pre-orders to warrant a manufacturing run. I will post more information as it becomes available. Thanks and have a nice day! Andrew Lynch -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
