Differences

This shows you the differences between two versions of the page.

--- boards:sbc:sbc_v2:sbc_v1 [2020/11/25 06:35]
b1ackmai1er [Pictures]
+++ boards:sbc:sbc_v2:sbc_v1 [2021/04/04 16:00] (current)
lynchaj [SBC V1]
@@ Line 2: / Line 2: @@
 The SBC-V1 is the creation of Andrew Lynch. Formerly known as the N8VEM Z80 SBC after Andrews Ham radio call sign, it launched a tsunami of developments based on the Euro Card Bus (ECB) standard. Much of the initial records on development from 2006 have been lost along with all the original design files but some pictures remain and the evolution can be picked up from the April-2008 [[https://www.retrobrewcomputers.org/n8vem-gg-archive/|archive]]
+Historical SBC V1 information can be found here
+[[https://retrobrewcomputers.org/n8vem-pbwiki-archive/0/35845334/38387371/35846565/index.htm|retired ECB SBC V1 (retrobrewcomputers.org)]]
+[[https://retrobrewcomputers.org/n8vem-pbwiki-archive/0/38274845/4200890/index.htm|Software and ROM Images (retrobrewcomputers.org)]]
@@ Line 27: / Line 33: @@
 [[:boards:sbc:sbc_v2:sbc_v1:gallery|Gallery]]
-===== Changes from V1 =====
-The V2 is upward compatible. The main difference is the added jumpers to allow 48k/16k memory mapping as an alternate to 32k/32k. All of the V1 software will run on the V2 with default jumpers.
-The V2 board has major corrections to the external Bus Master logic to support DMA. The V1 board is not able to support DMA. Since there are no add-on boards which have a DMA controller, this circuit update has never been tested or used.
-The serial interface is jumper configurable to support DTR/DSR protocol (V1 compatible), or RTS/CTS protocol (not on the V1).
-There is an DS1210 on the V2 board to provide 512k SRAM battery backup. The V1 does not have this capability. The RTC SRAM is battery backed on both boards.
-There is an option jumper on the Parallel Interface connector to strap pin 25 to either GND or 5v. On the V1 board this pin is tied to GND.
-The V1 board has a Power On LED; the V2 board has a HALT(red)/RUN(green) bi-color LED. This is considered extremely cool.