Z80 1st boot (wooot!)

saturn5tony

On Wed, Jun 23, 2021 at 04:33 PM, saturn5tony wrote:

The mechanics in the asr was amazing as well! I even remember some stories about the guy that designed it too. To me when I hear that sound, I still think of that power.

Yanno, this is true about that power. Not from the teletype tho. It was noisy but it had that particular kind of sound. To me in the early 70's into my teen years, when I heard that connected up to a nearby college via a special modem, I knew it was a computer that the printer was connected too, but that sound gave me the impression of the power of that far away computer, not the asr33.

If I here it it now, I know something very advanced is talking to it.

When I connected it up years later tho, (that asr33 was owned by my college), to a KIM-1 with its built in teletype drivers I never felt that. Go figure. I did know tho, that the processor It was talking too, was going to change the world.

saturn5tony

#282

On Fri, Jun 25, 2021 at 02:08 PM, saturn5tony wrote:

When I connected it up years later tho, (that asr33 was owned by my college), to a KIM-1 with its built in teletype drivers I never felt that. Go figure. I did know tho, that the processor It was talking too, was going to change the world.

To those that may not remember this, the KIM-1 was based on the 6502 in the early 70's. What is even more ironic, is that the Apple II that came after, another 6502 machine (one of my favs) was so much more sold to businesses because of the Microsoft Softcard. This really kept the Apple II going into the 80's. So to be honest to this group, the truth and really the creation of what Zilog produced, the Z80, which is in the Softcard, made the 6502 machine so popular. Ironic as this seems even more, these two processors changed the world, really. If you look at the big three in the 70's (in 1977), these two processors was apart of them all as well. What a great time.

So 6502 - 6502 - Z80 ... or.... 6502 - Z80 - Z80? lol

-Tony

#283

Hi Tony,??

Please, can you email me directly at joshbensadon at yahoo dotcom.

I wish to ask you about what happened over on Cosmacelf forum.??

Josh

On Friday, July 2, 2021, 04:39:53 p.m. EDT, saturn5tony via groups.io <saturn5tony@...> wrote:

On Fri, Jun 25, 2021 at 02:08 PM, saturn5tony wrote:

When I connected it up years later tho, (that asr33 was owned by my college), to a KIM-1 with its built in teletype drivers I never felt that. Go figure. I did know tho, that the processor It was talking too, was going to change the world.

To those that may not remember this, the KIM-1 was based on the 6502 in the early 70's. What is even more ironic, is that the Apple II that came after, another 6502 machine (one of my favs) was so much more sold to businesses because of the Microsoft Softcard. This really kept the Apple II going into the 80's. So to be honest to this group, the truth and really the creation of what Zilog produced, the Z80, which is in the Softcard, made the 6502 machine so popular. Ironic as this seems even more, these two processors changed the world, really. If you look at the big three in the 70's (in 1977), these two processors was apart of them all as well. What a great time.

So 6502 - 6502 - Z80 ... or.... 6502 - Z80 - Z80? lol

-Tony

#324

>>I would guess that if ever CP/M could run on a VAX, it would be an emulation. <<

A way late coooment as I didn't see it then...
I was a digit, aka DEC employee and lived in the central engineering world.
I got to see a lot of really cool stuff.

It was available three ways:

+Using the SIMH CPU/system emulator.

+There was a third party board that plugged into a VAX backplane and provide direct execution
?on z80 and the VMS OS provided disk and terminal IO services..
+ and some crazy guy used the CP/M 68K sources that were written in C and made a version
?that booted natively on a VMX (microVAX 3100) He was a member of the NETBSD on VAX?
?development team.

+ Actually there was also a version using the 68K C code that ran as a user application.
? It required VMS as it was a user application rather than booting on the base sysytem.

#325

Just a note there were versions of CP/M late in the game for Z8000 and 68000
that were the basic system written in C.? It turns out the 68K? had a instruction
set remarkably close to PDP11 and VAX which was the extension of the
PDP-11 16 bit CISC instruction set to 32bit.? The Z8000 a 16bit machine was
also closer to PDP-11 than Z80.

The cross compiler for those versions ran on DRCs VAX 11/750.?

Sources for asm and C versions are on line at Gaby's site.

Its familiar to me as I helped Tim create the the early compilations
back then mostly asm code and some PLM.

Allison

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Z80 1st boot (wooot!)