acadiel

I'm assuming the Gromulator and HSGPL are pretty similar?

Probably, but the professor did not have office hours yesterday or today.

I was wondering if some of you expert assembly programmers could redirect the DSK1 or DSK.TELCO (whatever it looks for) to a small subroutine in ROM that instead would bank to something, and copy the bytes to where Telco wants them, and then pass control back to Telco. :-)

Guys, check out this 3D printer on Kickstarter right now. https://www.kickstarter.com/projects/m3d/the-micro-the-first-truly-consumer-3d-printer?ref=home_popular

I had to post this for atrax on FB earlier, but here you go, for anyone wanting the source code Stuart, Tursi and I made to bank switch a 128K ROM (i.e. Fred's Megamod cart with all three of his utilities). It should read well if you know assembly, if not, let Tursi or I know and we'll explain. Source code: http://pastebin.com/LL1Lqm3t Copy/pastable object code: http://pastebin.com/METtGvwy All the routine does is take code in certain locations of the EPROM of a certain size, copy it to a certain address in 32K, switch to the next bank when it need to continue and has run out of data (obviously the data starts after the header), and continues to the next bank as needed, then branches to >A000 to start the program. Enjoy.

I'm testing printing one as we speak, Greg http://instagram.com/p/mjGwr5yhfW/

I use my BK Precision 844USB, but that is a $500 rig....

Too bad Telco needs all sorts of extra modules, or we could put it in there too

This is gonna be one fun cart! :-)

It pays if you use the tank only approach like I do to keep buying the same vendor; thus I've been using those Meritline brand ones for the past four or five years. Don't switch around because of the aforementioned quality issues.

I usually get my refills from Meritline. I have a Canon MX850 (probably about 6 years old). I usually order a bucket of refills at once from Meritline: http://www.meritline.com/showproduct.aspx?ProductID=29252&SEName=canon-cli-8-ink-compatible-with-new-chip-combo-5 Four sets sets me back $19.95 plus shipping (sometimes they have free shipping codes), and I've really only had maybe one in probably 50 go bad. For that price, I just tossed it and put another one in.

I don't run anything other than TKGROM0 in my SNUG system (when I boot it up, which is rarely). Tony did a great job making everything work OK. Is there any detriment to running TKGROM0 vs the stock GROM0 that comes with the HSGPL? I've never seen a list of pros and cons for the stock one vs. the Winkler one vs. TKGROM0. All I know is that Tony's ran what I wanted it without fuss.

I can't wait until we let this thing loose in the wild. Between the design that Ksarul did on the PCB, Tursi did in the Atmega GROM simulation, the 512K ROM part, and people putting stuff together like this... it's gonna be awesome. +1, everyone. Great job!

I hated that when I had Diskassembler, Explorer, and Advanced Diagnostics. That was before I found the track copiers, and then before Atrax gave me the *ahem* fixed versions like 15 years ago

Here's a Youtube video: Gives me more hope....I have a feeling if you want a professionally looking built one, we could take one of the Amiga ones and put a different end on it: http://amigakit.leamancomputing.com/catalog/product_info.php?cPath=21_72&products_id=226

Yep, and you can blame me for following the Databiotics inverted example for that. :-) Knowing them, they did it probably because it was a pain in you know what to deal with.

Tursi has done a great job updating Classic99 and Michael Zapf has done an excellent job updating MESS for the >16K ROM bank switching. However, I'm not aware of the other emulators.

Can we put up the V9 Gerbers since they handle the whole 512K without the two switches? Folks will probably want to make those over the V4's.... Thoughts?

Check this post out.... http://www.atariage.com/forums/index.php?/topic/223817-TI-99-4a-Cartridge-layout

That's one of the first things I'm gonna make too :-)

Sure, Matthew H and Arcadeshopper have already done so. :-)

Here's what I got back from CaDD: And Bill Gaskill:

I remember having a headache the night after I contributed my section to that document... LOL We probably want to deprecate the GAL information since we aren't using it.

Great idea if the Atmel AVR is going to be used... but if someone uses it as a ROM only cart (which it can be), then the 74LS378's I have tried are all powering up in the lowest 8K bank. This would need to be tested with new batches to make sure, but it's been pretty predictable. The same as the 74LS379's almost all powered up in the highest bank (being that we were using the inverted outputs on powerup.) For ROM only, the user would just need to make sure they verify their 378 is powering up in the lowest bank. We have a test program and EPROM image that writes to each bank to verify the correct bank contents, and we can likely also add a small section that tells you what bank it powered up in to verify operation.

You might want to keep up with this topic: http://atariage.com/forums/topic/193163-512k-cartridge-status/ Bottom line summary of where we are at with cartridges: 2007 or so, Carlos Randolph laid out an 8K ROM Board (v1) from a ROMOX board in ExpressPCB. 2009 or so, I took that layout and made a 16K ROM board (v2) with a 74LS379 (inverted) to do the bank switching. I designed. 2010 or so, I took that same layout and made a 64K ROM Board (v3) (you could also use 8K, 16K, and 32K ROMs with it.) I designed. The Gerber file was released for this. The 64K Boards are the last ones we've done any batches of (we being me, Matthew, and other people like Arcadeshopper). I have no concerns with others duplicating the work as long as my name or website stays on it (i.e. I get credit). Others that have been done but not mass released: V4B - 128K x 4 board - a prototype 128K ROM board that used all the inputs/outputs on the 74LS379 (27C010 EPROM). Ksarul helped design. Had space for two switches (i.e. four ROM banks of 128K). V5 never left the ground. It was going to be a GAL bank switched 512K cart with a 49F040 512K EEPROM. One rough draft exists in ExpressPCB. V6H - Uses a 49F040 512K ROM, a 74LS378 to bank switch, and an Atmega 1284P for GROM simulation. I believe this is close to the current iteration of the one that we are going to produce. V7D - Did get designed and printed; this used a GAL to replace the 74LS378/9, the 49F040 512K EEPROM, and the Atmega 1284 GROM simulator. We had issues with the GAL and decided to go with a 74LS378. Ksarul can elaborate why we moved from the V7 to the V8; I believe it was due to a different pinout on the ATMega 1284P. V8J - A 512K ROM board (49F040 - PLCC EEPROM) with an optional Atmega 1284 controller that can simulate the GROM in conjunction with the ROM with the GAL 74LS378/8 type bank switching. Shelved due to issues with the GAL. V9a - A 512K ROM board that uses a 74LS378 to bank the whole 512K (2764/128/256/512, 27C010/020/040) in 8K segments. An evolution of the V4B board with the 74LS378. Ksarul helped design. Ksarul can help correct anything that I missed.