Differences

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--- boards:sbc:sbc_v2:start [2018/07/13 05:21]
b1ackmai1er [Serial Cable Instructions]
+++ boards:sbc:sbc_v2:start [2018/07/16 12:48]
b1ackmai1er [Board]
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 {{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/photos/img_1112a.jpg?nolink&600x450|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_sbc_v2_photos_img_1112a.jpg}}
+[[:boards:sbc:sbc_v2:gallery|Gallery]]
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 [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=0e9afb&media=https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/sbc-v2-003-brd.png|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/sbc-v2-003-brd.png?direct&652x408}}]]
+===== Errata =====
+There is an error in the board layouts of sbc-v2-003 compared to the original schematic that results in the external reset not working in Kontron mode.
+To configure the board to work in Kontron mode with the external reset coming from the backplane the following workaround can be made.
+  - Pin 3 on K13 needs to be jumpered to Pin 2 of P6 (Reset switch jumper) - this connects the backplane reset input pin (c31) to the reset circuit input.
+  - Pin 1-2 needs to be jumpered on K13 - this connects the /reset circuit output to the backplane reset out pin(c26).
 ===== Jumper Settings =====
@@ Line 108: / Line 120: @@
 Baud rate can be changed using the CP/M MODE program i.e. MODE COM0:57600,8,N,1 /P
-If garbled characters are seen on the display for serial file transfers fail, a lower baud rate should be tried.
+If garbled characters are seen on the display or serial file transfers fail, a lower baud rate should be tried.
@@ Line 172: / Line 184: @@
-===== Parts List =====
-Full list of parts:{{:boards:sbc:sbc_v2:sbc-v2-parts-list.pdf|:boards:sbc:sbc_v2:sbc-v2-parts-list.pdf}}
-See [[:boards:sbc:sbc_v2:minimum-build|here]] for minimum build and parts substitution guidelines.
-===== Software =====
-There is extensive firmware support for the SBC V2 and associated ECB peripheral cards. Currently there are two firmware builds still being actively developed - UNA and ROMWBW.
-See [[:software:firmwareos:start#active_projects|here]] for current software builds and information on historical projects.
-A debug boot ROM can be installed for testing - try James Moxham's ROMIMAGE.BIN from [[:software:firmwareos:jm:start|here]].
-{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/romimage.png?direct&467x384}}
-==== REAL TIME CLOCK (RTC) ====
-The DS1302 real time clock can be set under CP/M using the **rtc** utility program.
-<code>
-Loading CPM...
-CP/M-80 Version 2.2C for the N8VEM, October 2008
-Run XM from A drive, this downloads file to B drive
-A>rtc
-Start RTC Program
-RTC: Version 1.0
-RTC: Commands: E)xit T)ime st(A)rt S)et R)aw L)oop C)harge N)ocharge D)elay I)nit G)et P)ut H)elp
-RTC: trickle charger disabled.
-RTC>
-</code>
-Set the time and date with the** //Init// **command first and then use the //**Set**//  command to program it.
-RTC.COM can also be used to set up trickle charging for the backup battery or super capacitor if connected. More Information on charging Super Capacitors can be found here: [[https://www.maximintegrated.com/en/design/tools/calculators/product-design/supercap.cfm|https://www.maximintegrated.com/en/design/tools/calculators/product-design/supercap.cfm]]
-The utility can also set and read the RTC memory.
-RTC.COM is part of Wayne Warthen's [[https://github.com/wwarthen/RomWBW|ROMWBW]] package.
-===== Status LED =====
-A single color or bicolor LED can be installed for the status LED. The LED monitors the status of the HALT line from the Z80 CPU. Consider the color selection and orientation when choosing. A red/green LED is ideal and logically should show green when cpu is running and red when halted. Or in the case of a single colour LED, on when cpu is running and off when halted. It is wise to not fully solder in the LED until the orientation has been checked to confirm the right sequence. Or, you could install a pin header and run flying leads to an LED mounted in a case,
-The HALT status can be initiated by booting CP/M and running the DDTZ debugger, loading and executing a HALT instruction.
-<code>
-B>ddtz
-DDTZ v2.7M by CB Falconer. CPU=Z80
--a100
-   hlt
--g100
-</code>
-===== Changes from V1 =====
-Information regarding V1 can be found [[:boards:sbc:sbc_v2:sbc_v1|here.]]
-\\