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Showing results for tags 'BOOT'.
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So I recently got interested in sound ICs, as a consequence of checking some parts bought via Ebay were genuine. I found about about VGM file format, which allows tunes to be played by various sound chips. So I bought a cheap non working Sega Megadrive for the purpose of harvesting the YM2612 sound chip. The intention was to connect it up to an Arduino (there are many projects on the web) in order to play Megadrive tunes from VGMs. Before I removed the sound IC, I was interested to see if I could figure out what was wrong with the unit. The reset switch was faulty, but that was a simple fix. Using a scope to look at signals around the MC68000, HALT and RESET have activity when the reset button is pressed. There is good 5V power and a good clock. Looking at some of the other pins I see 4 low going pulses of LDS and UDS, then no more activity. My guess is that these pulses are for the initial stack pointer and instruction counter (both 32 bit) which is 4 16-bit reads. I am a little uncertain, but perhaps the CPU halts if these are invalid in some way? I have attached some waveforms. it was done a few weeks ago, so please excuse my faulty memory! I think that notRESET is the yellow trace; notHALT is the cyan trace; and two of the top four traces are UDS and LDS. So the CPU does appear to halt. Here I admit that there was no cartridge inserted. I may have been thinking that there was some boot ROM, as I read something about TMSS (sp?). Nevertheless when I inserted a cartridge nothing changed. I would appreciate any advice as to what to try next or any pointers to sites which have detailed technical details about the boot process. For example where are the initial stack pointer and instruction counter read from: built in ROM; or the cartridge?
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On the Altirra emulator for Atari 8-Bit, I can boot into it with roms, disks and other media types and they all boot in fullscreen, but when I try to boot a tape load, it opens in a window instead, even if I set the /f parameter for fullscreen. Is there a way of booting tapes in fullscreen? Some setting I can't see?
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Probably about time for a MENU / BOOT / 9640 MENU development topic. "9640 MENU" 80 column [17 Feb 2020] 9640menu 17Feb2020.zip - Added TIPI clock support. Menu checks time about every second. I suppose I could remove the seconds and check ever 30 seconds or so. I don't know of a way to access the TIPI DSR without blinking the light - All other clocks are currently untested and might not function. I can barely understand the spaghetti code I wrote in 2015 (for reasons historically documented). Intent is to rework Classic99 and Triple Tech to use the DSR. MBP/Clulow/Geneve clocks will remain direct-access. . - Catalog routine overhauled. Sector IO out; level 3 catalog in place. Allows entry of a path e.g., TIPI.FOLDER1. or SCS1.FOLDER2. - Drill down into subdirectories and select the file you want to run or view - FCTN-8 to enter a new path; use the "..\" to go up a level. When you are at the root, pressing enter on the "..\" will recatalog the device. - If you exit the catalog and return the last path is remembered - The options creation (F4) and the Edit/Save (F5) options are still tied to disk numbers. Will look to change that down the road. - The options files are currently compatible with the prior release. This could change if I enhance the program with paths and other information, or redo the antiquated menu structure. - If you have a Remind-Me file in the TIPI root in the format MM-YYYY, pressing "Y" at the menu will display the day's reminders and any scratchpad notes. This feature is a novelty at present and subject to update or removal. The various clock support complexities may dictate my next steps. - Are there bugs? Probably. I am using this as my daily menu program via the Horizon 4000B at present. MENU 40 column 7.39 [16 Feb 2020] - Minor tweak for ROS 8.42c. See ROS development thread. Link to earlier topic related to 9640MENU
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While reconciling the Horizon Ramdisk ROS, CFG, and MENU programs I have been learning about GROM access. In all these years, I've never had much interest in GPL or GROM. That changed for a few reasons including the need to understand GROM to reconcile the source code and my curiosity of the magic that Tursi and Gazoo have been conjuring. Since there is no better way to learn (IMHO) about something than to experiment with it, I found the source code for the 80-column Geneve version of BOOT. In its native configuration, it resides in two GPL banks and over-rides the title screen. Gazoo's XB27 suite does something similar with BOOT so I removed most of the Geneve-specific code and started playing around. Gazoo, Atrax, and Omega have been most helpful testing and offering ideas. Although the program is not quite ready for release, I can tell you a few things about it: 1. The menu and all options are presented in 80 columns. F18A and V9938 80-column modes are supported. 2. BwG clock, MBP, Triple Tech, Geneve, and Clulow clocks are supported. Classic99's clock has been tested but not currently implemented due to space constraints. (incorporation will occur with future consolidation of the clock routines). 3. Menu files can be created as executables that are run from the menu itself. Chaining of menus is possible with this feature, allowing an "unlimited" number of selections. 4. The menu program can save itself to the Uber cartridge, similar to the function provided by Gazoo's cartridge code. It can also be saved to disk as BOOT. 5. Ramdisk boot tracking has been added for "DSK*." support, though this may not be necessary. 6. The cartridge finder has been updated to scan up to 16 GROM banks from g>9800 to g>983C. It will also find name headers in the same GROM, such as those found in the Mini Memory cartridge or XB27 suite. The HSGPL exhibits some odd behaviour that we are trying to track down. 7. Re-entry hooks are in place for potential return to the menu from external programs (provided they do not stomp on the menu code). This program is by no means a formal project and I make no promises on how far I will take it. Once a few more tests are completed, I'll share the first release for folks to play with. I haven't settled on a name for the program so for now, it will refer to its roots as the "9640 Menu System".
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Hi, I am (slowly ? ) rebuilding my PFM modded Geneve (384+192K) system and I really don´t know what controller/combination to use. Can/should I use the HFDC for the harddrive only plus adding a BwG (or CC9900) for the (2+HxC) floppy disk drives ? Makes that sense for an extra FDD-controller ? Maybe just to have it full or to prevent from any problems ? I have some controllers, so it is not the question to save up one. And I have no need for formats bigger than 720KB. I also want to add an HRD3000 Ramdisk, is it possible to boot from that, instead of the harddisk ? Does this make sense at all ? Or just install it without boot, just to have it ? Is there any use for the TripleTec-Card ? Speech maybe ? And use the CC9900 floppy controller instead of the BwG ? I also have the Myarc 512 KB RAM, but I think there is a special mod to be done, to use it in the Geneve ? And I will add a RS232, maybe I take the Myarc instead of the TI (?) I also have an ASCSI2-Controller, but I really do not want to use that because I want to keep my SNUG system complete. (if anyone wants to get rid off a WHT-SCSI, I am your man) What did I forget ? thx If needed, here is a picture: More detailed here: https://atariage.com/forums/topic/315250-ti-994a-show-your-modded-systems-here/?do=findComment&comment=4734298
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Hi! My name is Greg. New to the forum. Finally getting around to posting on here. I have been collecting retro computers and consoles for a number of years now, but have yet to really participate in forums. Currently I own an Amiga 600, TI 99/4A, Atari 800XL, and now new to the stable is a Tandy 1000 EX. It was obtained second hand for $5. I spent this afternoon taking the machine apart and cleaning; as well as inspecting the hardware. The computer is all clean now and boots to a prompt for a bootable discs. Herein lies the issue... I have no discs! I don't really have a way of imaging discs for 5.25 drives at this time unfortunately. After some research, I found that I will require MS-DOS 2.11 to be able to boot this machine to run software. Here are my questions. 1. Does anyone have a copy of MS-DOS 2.11 or has the means to copy a disc for me that could be mailed? 2. What is the easiest way to image these discs nowadays? Any suggestions or help would be greatly appreciated. If you can send me a copy that would be great. I would paypal for the copy of the disc and to cover shipping.
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Hi all, I recently rescued my old Atari 800XL from my parents' attic and wanted to give it a whirl. It's just a base unit with an XC12 cassette deck, bust I spent a huge amount of time on it when I was a kid, both playing games and programming. I connected it up and was delighted to find that familiar blue screen looking at me! However, it does not seem to be able to read data from the tape deck. In fact, having the tape deck even attached seems to affect the startup of the computer - with nothing attached to the SIO port, it starts up as normal. With the cassette deck attached however, the little noise before READY appears is different and much faster. I don't know what the purpose of that clicky noise is between the blue screen appearing and READY appearing, but having the tape deck attached affects it where it never used to back when I used it regularly. Anyone have any ideas what might cause this? I'm pretty good technically, but most of my retro experience is repairing Amigas - I don't have any experience with the Atari at all, so any pointers as to where the fault might lie would be appreciated. Thanks!
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Hi all - I just busted my cart port surround on my Atari 7800, so I'm looking for a replacement. This is the black plastic one screwed to the main PCB from underneath. Many thanks! Matt (Wakefield, UK)
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Hi all, I have a problem with my atari 4160ste, it suddenly started to stop booting. It was working fine, except the floppy drive which was dead, so I bought a replacement one and then everything was perfect for a day and suddenly I got this bomb screen on start up. I have no idea what is causing this, I checked all the chips and stuff inside to look for a dodgy connexion or anything suspicious but it all looks OK and since it was working 5 min before I wonder what could have gone wrong all of a sudden. It sometimes starts if I force reset several time, most of the time it turn it on and get no sound at all, like its not even trying, but if I reset it a couple times sometimes with a floppy inside, it will eventually load the game or come back to the TOS environment. I have no knowledge whatsoever in electronics and computer components, I can just see that all the connexion seem fine on my boards. Could be a dodgy ram upgrade from previous user ? but it was working everytime before and all looks in good working order. Any idea what could be causing this ? Advice most welcome. cheers!
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