Boot Sequence - Revision history

SevenFFF: Update boot sequence referencing latest info in gitlab

2022-10-24T21:25:46Z

Update boot sequence referencing latest info in gitlab

← Older revision		Revision as of 22:25, 24 October 2022
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	* If this is not the case, the main core is reloaded into the FPGA from flash memory, which includes the IPL (Initial Program Loader) in RAM. The IPL displays the message "Loading..." (which appears only very briefly) and loads the file '''TBBLUE.FW''' from the root of the SD card. If this fails, an error message is displayed ("Error initializing SD card!"), the border turns red, and the code loops.		* If this is not the case, the main core is reloaded into the FPGA from flash memory, which includes the IPL (Initial Program Loader) in RAM. The IPL displays the message "Loading..." (which appears only very briefly) and loads the file '''TBBLUE.FW''' from the root of the SD card. If this fails, an error message is displayed ("Error initializing SD card!"), the border turns red, and the code loops.

	* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the ~~file~~ '''~~TBBLUE~~\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. ~~The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear~~ how ~~they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG~~.~~INI file~~.		* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the files '''Machines\Next\CONFIG.INI''', '''Machines\Next\MENU.INI''' and '''Machines\Next\MENU.DEF''' from the SD card, and uses them to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. For more information on how this works, see https://gitlab.com/thesmog358/tbblue/-/blob/master/docs/config/config.txt

	* The TBBLUE loader then write-protects the areas of ROM, maps the addressable memory to the standard Spectrum layout, and resets the CPU.		* The TBBLUE loader then write-protects the areas of ROM, maps the addressable memory to the standard Spectrum layout, and resets the CPU.

Xalior at 16:09, 4 April 2020

2020-04-04T16:09:08Z

← Older revision		Revision as of 17:09, 4 April 2020
Line 5:		Line 5:
	* If this is not the case, the main core is reloaded into the FPGA from flash memory, which includes the IPL (Initial Program Loader) in RAM. The IPL displays the message "Loading..." (which appears only very briefly) and loads the file '''TBBLUE.FW''' from the root of the SD card. If this fails, an error message is displayed ("Error initializing SD card!"), the border turns red, and the code loops.		* If this is not the case, the main core is reloaded into the FPGA from flash memory, which includes the IPL (Initial Program Loader) in RAM. The IPL displays the message "Loading..." (which appears only very briefly) and loads the file '''TBBLUE.FW''' from the root of the SD card. If this fails, an error message is displayed ("Error initializing SD card!"), the border turns red, and the code loops.

	* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the file '''TBBLUE\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear how they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG.INI file.		* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the file '''TBBLUE\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear how they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG.INI file.

	* The TBBLUE loader then write-protects the areas of ROM, maps the addressable memory to the standard Spectrum layout, and resets the CPU.		* The TBBLUE loader then write-protects the areas of ROM, maps the addressable memory to the standard Spectrum layout, and resets the CPU.

Specnext: 2 revisions imported

2019-04-14T09:59:50Z

2 revisions imported

← Older revision	Revision as of 10:59, 14 April 2019
(No difference)

wiki>Hyphz at 21:50, 22 August 2017

2017-08-22T21:50:57Z

← Older revision		Revision as of 22:50, 22 August 2017
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	* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the file '''TBBLUE\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear how they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG.INI file.		* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the file '''TBBLUE\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear how they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG.INI file.

			* The TBBLUE loader then write-protects the areas of ROM, maps the addressable memory to the standard Spectrum layout, and resets the CPU.

			* The standard ROM setup is interrupted by DivMMC (how?) which runs the ESXDOS setup. This loads four files: '''SYS\ESXDOS.SYS''', '''SYS\NMI.SYS''', '''SYS\RTC.SYS''' and '''SYS\BETADISK.SYS'''. These are the user-layer software for ESXDOS, the NMI (non-maskable interrupt) driver for the DivMMC button, a real-time clock driver (?) and a TRDos Emulator layer for ESXDos.

			* The remaining Spectrum ROM setup runs, clearing the ULA screen and producing the Sinclair copyright message.

wiki>Hyphz: ''

2017-08-22T21:30:43Z

New page

The following is the assembled information about the startup sequence of the Spectrum Next.

* When the machine is first switched on, the [[Anti-brick system]] loads a fixed Spectrum 48k and checks to see if a particular combination of physical buttons is being held down. If it does, the updater module (see below) is loaded from the SD card and run on the anti-brick core.

* If this is not the case, the main core is reloaded into the FPGA from flash memory, which includes the IPL (Initial Program Loader) in RAM. The IPL displays the message "Loading..." (which appears only very briefly) and loads the file '''TBBLUE.FW''' from the root of the SD card. If this fails, an error message is displayed ("Error initializing SD card!"), the border turns red, and the code loops.

* TBBLUE.FW contains 3 modules; by default the boot module is loaded. It reads the file '''TBBLUE\CONFIG.INI''' from the SD card and uses it to configure the default machine settings. It then loads 3 ROM images from the SD card: one for the DivMMC interface, one for the Multiface, and one for the Spectrum ROM itself. The DivMMC ROM seems to always be loaded from '''TBBLUE\ESXMMC.ROM'''; the Multiface ROM is loaded from one of four potential files in the '''TBBLUE''' directory and it is not clear how they are selected; and the Spectrum ROM is loaded from the file named for the given configuration in the CONFIG.INI file.