Thanks Alex, added to web page John
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of J. Alexander Jacocks Sent: Wednesday, July 2, 2014 11:03 AM To: [email protected] Subject: Re: [N8VEM-S100:4462] Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards If it's useful to anyone, I made up a BoM for this board, using 74LS03s for U18 and U19. If folks would give it a look, and make sure that I didn't miss anything, I'd appreciate it. As usual, I split the buy between Digikey and Jameco. Part Type Value Reference Qty Vendor Part Number Price Capacitor, Ceramic 0.1 uF C3, C7, C8, C9, C10, C11, C12, 21 Digikey 490-9144-1-ND $0.24 C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C27 Capacitor, Alum 0.33 uF C1, C25 2 Digikey 445-5263-ND $0.32 Card Ejector S100 P34, P35 2 Digikey 492-1024-ND $0.45 Diode 1N4001 D16 1 Digikey 641-1310-1-ND $0.11 DIP Switch 2 Pos SW3 1 Digikey GH7115-ND $0.98 DIP Switch 8 Pos SW1, SW2 2 Digikey 450-1417-ND $1.19 Header 1x2 JP1, JP2, JP3 3 Digikey 609-3500-ND $0.18 Header 1x3 K1, K5, K6, K7, K8, K9, K10, K11, 11 Digikey 609-3461-ND $0.15 K12, K13, K14 Header 2x20 P36 1 Digikey OR1081-ND $1.99 Header 2x20, right P40, P41 2 Digikey 3M9485-ND $2.48 Heatsink TO-220 U1, U20 2 Jameco 326596 $0.29 IC 7403 U18, U19 2 Digikey 296-3620-5-ND $1.01 IC 74LS00 U5 1 Jameco 283725 $0.49 IC 74LS02 U15 1 Jameco 283741 $0.45 IC 74LS06N U11 1 Digikey 296-15069-5-ND $0.92 IC 74LS07N U17 1 Digikey 296-14878-5-ND $1.01 IC 74LS154 U13 1 Jameco 46738 $4.95 IC 74LS240 U10 1 Jameco 308291 $0.79 IC 74LS244 U7, U9, U12, U14 4 Jameco 308312 $0.69 IC 74LS32 U6 1 Jameco 295515 $0.49 IC 74LS682N U2, U3 2 Digikey 296-14898-5-ND $2.48 IC 74LS74 U16 1 Jameco 295726 $0.49 IC 8255 U8 1 Jameco 52724 $4.49 IC TIL311 DIS1, DIS2, DIS3, DIS4, DIS5, DIS6 6 eBay IC Socket DIP 14 DIS1, DIS2, DIS3, DIS4, DIS5, DIS6, 14 Digikey ED3045-5-ND $0.16 U5, U6, U11, U15, U16, U17, U18, U19 IC Socket DIP 20 U2, U3, U7, U9, U10, U12, U14 7 Digikey ED3054-5-ND $0.24 IC Socket DIP 24, 600 U13 1 Digikey ED3051-5-ND $0.26 IC Socket DIP 40 U8 1 Jameco 112311 $0.49 LED T1-3/4 Blue D6, D8 2 Digikey 754-1563-ND $0.91 LED T1-3/4 Green D15, D19, D20 3 Digikey 754-1474-ND $0.17 LED T1-3/4 Red D5, D18, D21 3 Digikey 754-1475-ND $0.18 LED T1-3/4 Yellow D9, D17 2 Digikey 754-1477-ND $0.18 Nut 4-40 U1, U20 2 Digikey KEY1032-ND $0.08 Resistor, Array 680, 10 SIP RR1 1 Digikey 4610X-1-681LF-ND $0.40 Resistor, Film 1.1 k R22, R25, R26, R27, R33, R34, 8 Digikey CF14JT1K10CT-ND $0.08 R37, R38 Resistor, Film 470 R9, R10, R12, R13, R19, R20, 14 Digikey CF14JT470RCT-ND $0.08 R24, R28, R29, R30, R31, R32, R35, R36 Screw 4-40 U1, U20 2 Digikey 9901K-ND $0.08 Transistor LM7805 U1, U20 2 Jameco 51262 $0.29 Thanks! - Alex On Sun, Jun 8, 2014 at 10:09 PM, yoda <[email protected]> wrote: > It really has nothing to do with the cards as the select is driven by > a flip-flop - I see the same thing on my board but have not set down > yet to debug what is going on but Thomas is right there is some timing > problem is going on as DO0 is clocked into the flip-flop via > SEL_SECOND* and WR* being combined - there is a mis-timing of the > signals as that really is the only thing that could cause this - guess > others have been lucky or have not tried to use the second CF card. > > Dave > > > On Sunday, June 8, 2014 7:42:16 PM UTC-5, Tom Lafleur wrote: >> >> fyi... >> >> One of the issues John has pointed out in the past, is that the >> current software/hardware is VERY SELECTIVE on what brand and model >> of cards that work with this board... >> >> It maybe necessary at some point to redo his code based on the Z80 >> Zeta code or other ?, that handles a large number of cards... >> >> I'm sure its a timing issues... but it may need someone to look at it >> in detail... >> >> >> >> >> On Sun, Jun 8, 2014 at 7:43 PM, Thomas Owen <[email protected]> wrote: >>> >>> All, >>> My preliminary check this afternoon shows me that there is a timing >>> issue at U15, the 74ls02. Using my logic analyzer and monitoring >>> the inputs and the output (which clocks the flip flop) I see a big >>> timing difference between SEL_SECOND and WR. >>> What this means is that the output of the gate never goes high. >>> >>> I am going to start a new post to document and deal with the >>> troubleshooting of this problem. >>> >>> Thanks, >>> Thomas >>> >>> -- >>> 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. >> >> >> >> >> -- >> >> ~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~ >> >> Tom Lafleur >> (858) 759-9692 > > -- > 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. -- 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. -- 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.
