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annotate tcsm2-notes/trco @ 17:776229c5d640

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tcsm2-notes/trco: the big XO is said to be TCXO rather than OCXO
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 29 May 2024 03:00:02 +0000
parents 2daf8f209707
children b36419bbc2c4
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16
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 Major components on TRCO board:
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 1x Lattice ispLSI1032E PLD, same as on TR16-S
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 1x CPU: Intel TN80C186EB20
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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5
17
776229c5d640 tcsm2-notes/trco: the big XO is said to be TCXO rather than OCXO
Mychaela Falconia <falcon@freecalypso.org>
parents: 16
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6 1x really big oscillator component, labeled 16.384 MHz, likely OCXO (or TCXO?)
16
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 1x MAS9316N DAC close to it - likely TDM common clock for the system
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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8
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 3x Infineon chips, 2x SAB 82525 (2x HDLC) and 1x SAB 82526 (1x HDLC):
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 the 5 HDLC channels which the available documentation touches on
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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11
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 8x PLCC32 chips (9 pins on wide side, 7 pins on narrow side) with stickers
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 on them that obscure the markings underneath. The markings read IC45 through
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 IC48 in the top row of 4, IC55 through IC58 in the bottom row of 4. All 8
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 ICs are directly soldered. Suspected flash memory.
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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16
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 Next to these 8 ICs there is a socketed PLCC44 IC (11 pins on each side)
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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18 with a sticker that reads:
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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19
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 TRCO
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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21 6.1-0
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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22 TC1ROMQL
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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23
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 It is clearly a programmed part of some kind, but not clear if it is flash
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 (boot code?) or some PLD or whatever.
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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26
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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27 Further insight can be gained by peeling off the stickers, but I am not going
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 there yet: my current plan is to try powering this unit as-is and see if it
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 comes to life in a useful way. If it turns out to lack the needed fw, or lack
2daf8f209707 tcsm2-notes: initial observations on boards
Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 TFO feature, then proceed further with reverse eng.