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RE: [N8VEM-S100:4462] Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards
Thanks Alex, added to web page
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of J. Alexander Jacocks
Sent: Wednesday, July 2, 2014 11:03 AM
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,
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
Resistor, Film 470 R9, R10, R12, R13, R19, R20,
14 Digikey CF14JT470RCT-ND $0.08
R24, R28, R29, R30, R31, R32, R35,
Screw 4-40 U1, U20
2 Digikey 9901K-ND $0.08
Transistor LM7805 U1, U20
2 Jameco 51262 $0.29
On Sun, Jun 8, 2014 at 10:09 PM, yoda <yo...@r2d2.org> 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.
> On Sunday, June 8, 2014 7:42:16 PM UTC-5, Tom Lafleur wrote:
>> 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 <thoma...@gmail.com> wrote:
>>> 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.
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>> ~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~
>> Tom Lafleur
>> (858) 759-9692
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