Got your care package in the USPS. Thank you! I successfully burnt a 27C256 and booted from it, reading a bios.next I assembled... _that_ mission accomplished.
With my new burner I also had to specify .hex from the default .bin. - jeffa On Saturday, February 7, 2015 at 8:00:43 AM UTC-7, Crustyomo wrote: > > Hi Jeffa, > > I will find a 27256 and try it on my board. I wouldn't think 27C256 would > make a difference... but perhaps it might in this case, since we are > running the 7805C near its limits. In the mean time, you can burn the > candle from the other end by finding a 27C256. I can mail some of these > chips to you if don't have any. > > Regards, > Josh > > > ------------------------------ > Date: Sat, 7 Feb 2015 05:56:13 -0800 > From: [email protected] <javascript:> > To: [email protected] <javascript:> > Subject: [N8VEM-S100:6229] AIRBL 8080a boot loader ROM > > I modified the AIRBLv23.asm to include the following as a visual > confirmation that I burnt the .OBJ file to EEPROM prior to possible mods in > the future. > > LXI H,MSG1 ;System Start, Display Welcome Message > JMP PRINTI_NS > MSG1 .text "\r\nALTAIR/IMSAI 8080 CPU BOARD BOOT LOADER - Josh Bensadon > (Jan 3, 2015)" > .text "\r\nFebruary 1 2015 jeffa burnt this ROM\r\n" > .text "\r\n<D> -Directory" > .text "\r\n<R> -RAM Test" > .text "\r\n<V> -View Load" > .text "\r\n> \000" > > Unlike the boot from the ROM supplied with the board, this one came up as > displayed in this image. Reset / Run appears a bit flaky compared to the > delivered ROM. Perhaps there is a timing problem. It's a different menu > than the ROM supplied. I was able to push R RAM Test once. It came up with > an error. The boot wasn't consistent. Sometimes it appeared to default, > without my keyboard entry, to a directory. I replaced the original ROM and > the board acted normally, booted cp/m and verified RAM OK. > > > <https://lh5.googleusercontent.com/-tKQtLuHkUpA/VNYVUt4cUxI/AAAAAAAAA4k/adIPIFrNlfY/s1600/IMG_1808.JPG> > > > I simply made the change to the source, built with 'tasm -85 AIRBLv23.asm' > in a FreeDOS virtual machine on my Windows 8.1 64bit notebook and burnt the > ROM with the resultant .obj file. > > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
