Z80 1st boot (wooot!)

saturn5tony

On Sat, Jun 12, 2021 at 09:23 AM, joshbensadon wrote:

Heathkit used a similar model and it was successful.?

I think thats why I love all the stuff Lee (and you) have done here. When I was 13 I got some kits from Heathkit (and Eico) and I think that was so wonderful to do and explore. I knew crap about electronics back then and why something did what it did. Those kits gave me that knowledge years before I went to college. When heathkit went downhill so did a piece of me. I wish I could have bought more of them.

You guys have the same approach here (and Lee mentions that a bit too in these topics) and I think not only for me but beginners will now know how that feels. The Z80MC and 1802MC are awesome.
-Tony

#264

Tony,

That's all Lee.? He's big on taking little steps.? He's always going on about grand builds that start at the bottom.? Building modules one at a time, testing them individually then combining them.? Heathkit used a similar model and it was successful.? Of course, step 1 was always "build the power supply".? ?:)

Josh

On Friday, June 11, 2021, 06:05:25 p.m. EDT, saturn5tony via groups.io <saturn5tony@...> wrote:

On Fri, Jun 11, 2021 at 05:51 PM, joshbensadon wrote:

Tony,? looking good!

Thanks Josh,
Yea it was the Additional Operating details with ZMCv15 ROM you and Lee wrote that really helped alot. I saw how you guys set it up to test only the Z80 card by itself that got it working so fast. I knew I had a problem with that card at the 1st point looking at it with my scope. Yup Lee said an HC368 so yup it had to be one. No issue there at all. My HC stock is very low being I came from those days with LS's and such in my Lab, lol

Great Docs from both of you. Man this is a lot of fun.

saturn5tony

#263

On Fri, Jun 11, 2021 at 05:51 PM, joshbensadon wrote:

Tony,? looking good!

Thanks Josh,
Yea it was the Additional Operating details with ZMCv15 ROM you and Lee wrote that really helped alot. I saw how you guys set it up to test only the Z80 card by itself that got it working so fast. I knew I had a problem with that card at the 1st point looking at it with my scope. Yup Lee said an HC368 so yup it had to be one. No issue there at all. My HC stock is very low being I came from those days with LS's and such in my Lab, lol

Great Docs from both of you. Man this is a lot of fun.

#262

Tony,? looking good!?

On Friday, June 11, 2021, 05:21:03 p.m. EDT, saturn5tony via groups.io <saturn5tony@...> wrote:

Here is the 1st boot of just the Z80MC CPU board!? yippee!
Finished it last week but it had no clock. Found out that my use of a 74LS368 was not a good Idea, so I put an order in to Mouser for an HC368 as Lee designed it for, got it today and in business with the zed80...sweet!!

@@@@ @ H?
Hard Reset 01
AF =1D68? BC =0840? DE =FF80? HL =FFFF
AF'=01FF? BC'=FFFF? DE'=FFFF? HL'=00C3
IX =FFFF? IY =FFFF? IR =001D? PC =FFFF? SP =FB00
Press M for Monitor..............................
????????????????????????????????????????????????? MICRO-BASIC COPYRIGHT 1983 BY DAVE DUNFIELD
READY
?NO PROGRAM ERROR
READY
10 PRINT "HELLO WORLD";
20 GOTO 10
LIST
0010 PRINT "HELLO WORLD";
0020 GOTO 10
READY
RUN
?SYNTAX ERROR IN LINE 0010
READY
10 PRINT "HELLO WORLD"
RUN
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
STOP IN LINE 0020
READY

Here is a pic of it (note to the top right with a discrete clock, now disconnected) also showed me that the chip enable's needed the HC368 as well.

Notice the (white) Mostek Z-80 from 1977! Wow, I was very careful bringing that up power wise too.

Well next I will need to replace the LS245 and LS273 with HC's as well but Mouser did not have any of these on hand.
Might work OK but well see.? Also I will be finishing the front panel card and the SIO card as well in the next few days so wish me luck.? 8-)

-Tony

saturn5tony

#261

Here is the 1st boot of just the Z80MC CPU board!? yippee!
Finished it last week but it had no clock. Found out that my use of a 74LS368 was not a good Idea, so I put an order in to Mouser for an HC368 as Lee designed it for, got it today and in business with the zed80...sweet!!

@@@@ @ H?
Hard Reset 01
AF =1D68? BC =0840? DE =FF80? HL =FFFF
AF'=01FF? BC'=FFFF? DE'=FFFF? HL'=00C3
IX =FFFF? IY =FFFF? IR =001D? PC =FFFF? SP =FB00
Press M for Monitor..............................
????????????????????????????????????????????????? MICRO-BASIC COPYRIGHT 1983 BY DAVE DUNFIELD
READY
?NO PROGRAM ERROR
READY
10 PRINT "HELLO WORLD";
20 GOTO 10
LIST
0010 PRINT "HELLO WORLD";
0020 GOTO 10
READY
RUN
?SYNTAX ERROR IN LINE 0010
READY
10 PRINT "HELLO WORLD"
RUN
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
HELLO WORLD
STOP IN LINE 0020
READY

Here is a pic of it (note to the top right with a discrete clock, now disconnected) also showed me that the chip enable's needed the HC368 as well.

Notice the (white) Mostek Z-80 from 1977! Wow, I was very careful bringing that up power wise too.

Well next I will need to replace the LS245 and LS273 with HC's as well but Mouser did not have any of these on hand.
Might work OK but well see.? Also I will be finishing the front panel card and the SIO card as well in the next few days so wish me luck.? 8-)

-Tony

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Z80 1st boot (wooot!)