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boards:sbc:sbc_v2:start [2020/12/01 05:39]
b1ackmai1er [Software]
boards:sbc:sbc_v2:start [2020/12/02 08:39] (current)
b1ackmai1er [SBC V2]
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-====== SBC V2 (web pages currently being reformatted b1ackmai1er 1/12/2020) ======+====== SBC V2 ======
  
 The SBC V2 is a Zilog Z80 processor board. It's a 100x160mm board that is capable of functioning both as a standalone SBC or as attached to the ECB bus. The SBC V2 is a Zilog Z80 processor board. It's a 100x160mm board that is capable of functioning both as a standalone SBC or as attached to the ECB bus.
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 For most people, the [[:boards:sbc:sbc_v2:sbc_v2-004|SBC-V2-004]] offers the most convenience and functionality. For most people, the [[:boards:sbc:sbc_v2:sbc_v2-004|SBC-V2-004]] offers the most convenience and functionality.
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 +|{{https://www.retrobrewcomputers.org//lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/photos/built-up-sbc-v2.jpg?nolink&200x149|www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_sbc_v2_photos_built-up-sbc-v2.jpg}}|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/sbc_v2-004/gallery/sbc-v2-004z.png?nolink&250x161}}|{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/sbc/sbc_v2/sbc_v2-005/gallery/sbc-v2-005f.png?nolink&250x161}}|
 +|[[:boards:sbc:sbc_v2:sbc_v2-003#sbc_v2-003a|sbc-v2-003A]]|[[:boards:sbc:sbc_v2:sbc_v2-004#sbc-v2-004|sbc-v2-004]]|[[:boards:sbc:sbc_v2:sbc_v2-005#sbc-v2-005_megaflash|sbc-v2-005f]]|
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-==== 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. 
- 
-[[:software:firmwareos:romwbw:apps|RTC.COM ]]is part of Wayne Warthen's [[https://github.com/wwarthen/RomWBW|ROMWBW]] package. 
- 
- 
- 
-===== One Bit Input Port ===== 
- 
-Bit 6 of RTC port $70 is connect to an on board jumper JP2 which can be read by software. By default it is tied high. Removing jumper JP2 will result in the being tied low (=0). 
- 
-Effectively this creates a configurable jumper setting which the ROMWBW bootrom can use for determining the primary communications console. 
- 
-This facility is not enabled by default in ROMWBW and the setting is ignored. To enable, rebuild the ROMWBW package with the CRTACT setting set to true. The CRT type can also be configured at this time: 
- 
-<font inherit/Courier New,Courier,monospace;;inherit;;inherit>SBC_std_cust.asm</font> 
- 
-<code> 
-CRTACT        .SET    TRUE           ; CRT ACTIVATION AT STARTUP 
-VDAEMU        .SET    EMUTYP_ANSI    ; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...) 
-</code> 
- 
-This will cause ROMWBW to check the status of BIT 6 at startup. If "0" (jumper removed) it will change the primary communications console from the Serial UART to the first CRT console found. If a CRT console is not found it will default back to the Serial UART. If BIT 6 = "1" (jumper in place) it will boot as normal with the primary console using the Serial UART. 
  
  
boards/sbc/sbc_v2/start.1606819145.txt.gz · Last modified: 2020/12/01 05:39 by b1ackmai1er
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