Loading ...
Sorry, an error occurred while loading the content.
Advanced Search
Author
Subject
Message
Special notice only

Advanced Search
  • Bob: what about the current use of q and port 7 for the leds? Is that all on the board you're replacing? Did you do a schematic for the original board? This is very exciting. On Apr 7, 2017, at 9:36 PM, 'Robert Armstrong' bob@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: >Mark Abene < phiber@^$3 > wrote: >Bob, do you plan on sharing the schematic? Ok, I uploaded a preliminary schematic...
    bill rowe Apr 8
  • The 1802 will run comfortably at higher speed with higher voltage. Did you look at the 1806 data sheet? On Apr 7, 2017, at 8:45 PM, Mark Abene phiber@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: So I have some 1806's on the way from Hong Kong (ebay), due here within the week, as I plan to create an ELF homebrew micro. I know the max clock frequency for the 1806 is 5MHz, according to...
    bill rowe Apr 8
  • ...1b0f-11e7-93a5-74dbd180106f%257Cparentrq%253A452b442215b0a2b143d8d948ffffd99f%257Ciid%253A5 On Apr 6, 2017, at 3:20 PM, bill rowe bill_rowe_ottawa@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: I switched to 7b 7a 30 00 and reseated the eeprom - looks good so far. now to try the...
    bill rowe Apr 6
  • Fetching Sponsored Content...
  • ...Thor calculators in C$ On Apr 6, 2017, at 4:56 PM, 'Robert Armstrong' bob@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: >bill rowe < bill_rowe_ottawa@^$3 > wrote: >Thanks especially to bob Armstrong for the disassembly. Aww, thanks, but I didn't do it. The disassembly was mostly...
    bill rowe Apr 6
  • There we go - I had the led initialization sequence wrong. Thanks especially to bob Armstrong for the disassembly.
    bill rowe Apr 6
  • ...7a 30 00 and reseated the eeprom - looks good so far. now to try the display again. From: cosmacelf@^$1 on behalf of bill rowe bill_rowe_ottawa@^$2 [cosmacelf] Sent: April 6, 2017 3:06 PM To: cosmacelf@^$3 Subject: Re: [cosmacelf] Re: CDP1805 based hand held calculator...
    bill rowe Apr 6
  • I've made my first stab at reprogramming the boyd. The eeprom goes in easily enough and i think it's pinned and addressed correctly. No great results though. I tried a sequence of writes to the LEDS with no luck. I've gone two a two byte program 30 00 and hooked up my logic analyzer to trace it. I see the clock start up at the 200khz everyone else has noted I see the processor...
    bill rowe Apr 6
  • ...firmware - what did you use? From: cosmacelf@^$1 on behalf of jon jon@^$2 [cosmacelf] Sent: March 26, 2017 5:11 PM To: bill rowe bill_rowe_ottawa@^$3 [cosmacelf] Subject: Re: [cosmacelf] Re: CDP1805 based hand held calculator Bill, I looked at the 28C16 and 48Z02 a bit further...
    bill rowe Apr 5
  • Hey marcel: I went back through this to document the issue and of course it works now! On Apr 2, 2017, at 3:05 PM, bill rowe bill_rowe_ottawa@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: Ok marcel, I'll send off list On Apr 2, 2017, at 1:06 PM, kb1gmx@^$3 [cosmacelf] < cosmacelf...
    bill rowe Apr 4
  • Ok marcel, I'll send off list On Apr 2, 2017, at 1:06 PM, kb1gmx@^$1 [cosmacelf] < cosmacelf@^$2 > wrote: Get the Vt100 manual on bitsevers.org . If memory serves (its been 35years since working with with VT100 at DEC) Newline is when set means the keyboard sends CR/LF. For lines over 80 chars o receive then it's line wrap on. I could fire up a vt100 to verify it but I will not as...
    bill rowe Apr 2