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Yesterday appeared to be a disaster. My two puppy miniature schnauzers got into the living room where my CC-40, HEXTIr and RPI were setup and running. It seems they ran around the table and caught the power cord and all but the CC-40 fell to the floor. I found it later in the day. Sadly the HEXTIr failed over and over with I/O errors after this incident. I could see the riser pins seemed a bit bent as were the HEXBUS connector pins. Ooff. I spent the morning removing the riser pins and replaced all with wires between the two boards. It worked, thankfully. I've been considering moving the HEXTIr into a HEXBUS modem enclosure, so perhaps this was a "helpful" accident as I would probably have never gotten to such a project. 

 

I've been writing the hangman game with ANSI graphics via the HEXTIr and it's working now with just a few more improvements to go. The program file is 2970 bytes now. My CC-40 has 18 KB RAM so no big deal, but this is also just hangman.

  • Like 4

This hangman game demonstrates the value of an external display for the CC40. 

 

The game uses two methods for display, one by sending each of the text attributes (color, boldness, etc.), setting positions, etc. as separate print statements. The second uses printing of pre-generated strings. The former is demonstrated by the title screen and the latter is demonstrated by drawing the stick figure and tower. The latter is much quicker.

 

 

  • Like 3
On 4/1/2024 at 6:09 AM, Vorticon said:

That is very cool. I wish there was a way to somehow redirect system input/output to the serial port. That way one could use a serial console for programming. 

I've also been thinking about that. I'm pretty sure I/O is possible (input in particular) but kinda doubt the programming part, at least without a ROM upgrade. I like your thinking to make an external display truly a first class citizen.

  • Like 1
  • 2 months later...
  • 1 month later...

Sorry to bother folks, but I was continuing to clean up my library footprints for the cc40 items, and I realize I don't have good measurements of the edge connector length.  I have the width from various IT docs, but the length is not specified on their docs.  I'd like to ensure the length is as correct as can be.

 

Anyone have a spare cart to lend me or maybe a micrometer in hand to measure?

 

Jim

On 8/5/2024 at 12:39 PM, brain said:

Sorry to bother folks, but I was continuing to clean up my library footprints for the cc40 items, and I realize I don't have good measurements of the edge connector length.  I have the width from various IT docs, but the length is not specified on their docs.  I'd like to ensure the length is as correct as can be.

 

Anyone have a spare cart to lend me or maybe a micrometer in hand to measure?

 

Jim

Was moving around boxes and found I do have the CC-40 Memo Processor cartridge. Measured with a micrometer and it is 1.0465 in.

  • Like 1
On 8/5/2024 at 12:39 PM, brain said:

Sorry to bother folks, but I was continuing to clean up my library footprints for the cc40 items, and I realize I don't have good measurements of the edge connector length.  I have the width from various IT docs, but the length is not specified on their docs.  I'd like to ensure the length is as correct as can be.

 

Anyone have a spare cart to lend me or maybe a micrometer in hand to measure?

 

Jim

I can send you my cartridge. Let me know.

On 8/7/2024 at 11:56 AM, mrvan said:

If you still want to borrow the cortridge to prove overall fit, I'd be happy to send it to you.

If the offer is still open, I'd love to measure yours.  When it didn't look like anyone could help, I went ahead and bought one off eBay, and it just arrived.  But, it's got different dimensions from yours and I thought it might just be a smaller PCB, but it *JUST* fits in the case.  So, having the case for your PCB would be helpful as well.

 

Jim

8 hours ago, brain said:

If the offer is still open, I'd love to measure yours.  When it didn't look like anyone could help, I went ahead and bought one off eBay, and it just arrived.  But, it's got different dimensions from yours and I thought it might just be a smaller PCB, but it *JUST* fits in the case.  So, having the case for your PCB would be helpful as well.

 

Jim

OK, will send it to you later today.

  • Like 2

Interestingly, @mrvan and I have two different PCBs, at least dimension wise.  I'll take pics and post, but his aligns more to the spec, while mine is shorter.

 

For the record, the edge connector pads appear to be 9mm long.

 

I find that surprising, since both are official TI carts.  His is MEMO PROCESSOR and mine is ADVANCED EE.

 

Jim

 

  • Like 2

IMG_2300.thumb.JPG.8949e8004f355eedda723a420b5d10f6.JPG

Mine on left (AEE), @mrvan's on the right (note angled corners on his, straight on mine.  Mine is also shorter than spec.

IMG_2301.thumb.JPG.968e0852b79a7f867ab9f96b847924af.JPG

Mine (bottom) has shorter edge connector width and length

IMG_2302.thumb.JPG.22c8862bf641446eb573ce33f5ba635e.JPG

Same overall width.

IMG_2303.thumb.JPG.8ec92e3a8150bec98f8f4acc777ea230.JPG

Mine has fatter edge pads (.030 versus .027 or so)

 

Here's the specs I measured, in case folks care later:

 

  Jim (AEE) mrvan (MEMO PROC) Spec
  Std Metric Std Metric Std Metric
Total Height 1.83 46.380 1.89 48.010 1.89 48.006
Main PCB Height 1.45 36.820 1.45 36.810 1.45 36.830
Edge Height 0.38 9.560 0.44 11.200 0.44 11.176
Edge Pad Height 0.31 7.760 0.35 9.000 0.35 9.000
Width 1.70 43.220 1.70 43.160 1.70 43.180
Edge Width 1.05 26.660 1.04 26.480 1.05 26.670
Tab Width 1.80 45.700 1.80 45.700 1.79 45.560
Contact to Center 0.68 17.200 0.74 18.710 0.75 19.050
Top to Center 0.95 24.140 0.95 24.220 0.94 23.876
Calculated Height 1.83 46.380 1.89 48.010 1.89 48.006
Left to Center 0.77 19.660 0.78 19.690 0.77 19.558
Right to Center 0.73 18.520 0.72 18.390 0.73 18.542
Calculated Width 1.70 43.220 1.70 43.160 1.70 43.180
Drill size 0.20 5.040 0.20 5.080 0.20 5.080
Thickness 0.04 0.910 0.04 0.910 0.04 1.000
             
Height Delta 0.00 0.000 0.00 0.000    
Width Delta 0.00 0.000 0.00 0.000    

 

And, here's the updated sheet from everyone's previous measurements:

 

  HeloCast (std) Lee # 1 (metric) Acadiel #1 (std) Lee #2 (std) Lee #2 (metric) Acadiel #2 (std) Acadiel #3 (std) Average Jim (AEE) mrvan (MEMO PROC) Spec
  Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric Std Metric
Total Height 1.85 46.990 1.69 42.895 1.70 43.180 1.91 48.419 1.89 48.000 1.89 48.006 1.90 48.184 1.83 46.525 1.83 46.380 1.89 48.010 1.89 48.006
Main PCB Height 1.46 37.000                         1.46 37.000 1.45 36.820 1.45 36.810 1.45 36.830
Edge Height                                 0.38 9.560 0.44 11.200 0.44 11.176
Edge Pad Height                                 0.31 7.760 0.35 9.000 0.35 9.000
Width 1.70 43.180 1.49 37.895 1.70 43.180 1.72 43.656 1.73 44.000     1.70 43.193 1.67 42.517 1.70 43.220 1.70 43.160 1.70 43.180
Edge Width                         1.05 26.645 1.05 26.645 1.05 26.660 1.04 26.480 1.05 26.670
Tab Width                                 1.80 45.700 1.80 45.700 1.79 45.560
Contact to Center     0.73 18.447 0.75 19.050 0.75 19.050 0.75 19.000 0.75 19.050 0.75 19.037 0.75 18.939 0.68 17.200 0.74 18.710 0.75 19.050
Top to Center     0.96 24.447 0.95 24.130 0.97 24.606 0.98 25.000 0.95 24.130 0.95 24.143 0.96 24.409 0.95 24.140 0.95 24.220 0.94 23.876
Calculated Height     1.69 48.000 1.90 48.260 1.92 48.762 1.93 49.105 1.90 48.260 1.90 48.260 1.87 48.441 1.83 46.380 1.89 48.010 1.89 48.006
Left to Center     0.83 21.000 0.83 21.082             0.83 21.095 0.83 21.059 0.77 19.660 0.78 19.690 0.77 19.558
Right to Center     0.87 22.000 0.87 22.098             0.87 22.123 0.87 22.074 0.73 18.520 0.72 18.390 0.73 18.542
Calculated Width     1.69 43.000 1.70 43.180             1.70 43.218 1.70 43.133 1.70 43.220 1.70 43.160 1.70 43.180
Drill size     0.20 5.105 0.20 5.080 0.20 5.105 0.20 5.105 0.20 5.080 0.20 5.080 0.20 5.093 0.20 5.040 0.20 5.080 0.20 5.080
Thickness                         0.03 0.762 0.03 0.762 0.04 0.910 0.04 0.910 0.04 1.000
                                             
Height Delta 1.850 46.990 0.000 (5.105) (0.200) (5.080) (0.014) (0.343) (0.044) (1.105) (0.010) (0.254) (0.003) (0.076) (0.042) (1.916) 0.000 0.000 0.000 0.000    
Width Delta 1.700 43.180 (0.201) (5.105) 0.000 0.000 1.719 43.656 1.732 44.000 0.000 0.000 (0.001) (0.025) (0.024) (0.615) 0.000 0.000 0.000 0.000    
                     
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             

 

I'm reluctant to call into question others' measurements, as there may be more variations yet.  It looks like @acadiel's measures similar to @mrvan's

 

 

For those with an HP logic analyzer, or those wanting a place to connect some probes, while testing out a cartridge, I made this:

 

IMG_2305.thumb.JPG.087e3106436d2f2e6c2cea016223d8f6.JPGIMG_2304.thumb.JPG.781daafff04a1c4f6d3100bbb0ec6d81.JPGIMG_2306.thumb.JPG.b08014036bb9ad57a8005ceaa65e4bf1.JPG

I need to buy a 20x2 connector for the end, and production units need some the pins labeled (I did on this one, but on the wrong layer, so they did not get printed)

 

Edited by brain
  • Like 5
  • 2 months later...
  • 1 month later...

Has anyone got the HEXTIr serial interface working with the TI-74?

 

I've tried numerous settings (speed, parity, stop bits, xfer type etc) on both ends and cannot get reliable output.

 

I've also tried setting the defaults and SToring them which doesn't appear to work.

 

My HEXTIr appears to be loaded with version 0.9.3.1 so I don't know if updating the version includes serial fixes.

 

I've tried opening device 20 and printing to it and I've also tried listing a program to device 20.

 

Disk save and load works fine so I know the device and interface are basically working.

 

Any advice appreciated.

Edited by dmh88

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