10 MB drives the size of small washing machines, 2MB slide in cartridges that everyone had.? Set 22 (in octal) on the front panel switches to make it boot from the hard drive.
Someone reworked the DG assembler (nova 1200 and later Eclipse) to assemble 6502 (modified instructions, LDA,yes ldax, yes, LDADY (load A indirect through Y register (addr + Y), and LDAXD which was load Adr indexed by X, then do indirect).? That kind of thing.
Did wonders for homebuilt systems.? Program the EPROMS at work over lunch and take them home to debug.
Harvey
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On 9/20/2024 11:39 AM, Dave_G0WBX via groups.io wrote:
Crikey!
Mentions of Data General Nova computers!
I was wrangling them (Nova 3's and 4's) back in the early 80's where they were used to run GCMS chemical analysis machines assembled where I worked.
Memories of booting the 3's with the front panel switches, and some "fat finger" entered binary code via those console switches to "test" defective I/O boards on extenders, using a simple logic probe (two lights type!)
And some software that played tunes on a Tektronix 4010 terminal!
Thanks for the surprise burst of memories!
Dave 'KBV.
