EBUS
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EBUS
Proprietary 78-lines Interface with 54 testpads of the partial communication between South Bridge + Syscon Hardware with Starship2 towards dual NAND 15pin (+ 2x VCC + 2x GND) interface.
(in comparison, a Teensy 2.00++ only has 51 lines, not all are useable as programmable I/O)
Because the exposed EBUS is only partial, entire flash will never be accessable, not even when the protocol is 100% reversed. The lower interface of NAND is exposed complete and also lesser wires/pins than the EBUS.
For this reason, reading/writing to flash is adviced using the CFI of the standardised dual NANDs (perfectly useable with a Teensy 2.00++).
Protocol / line usage
- Datastream:
- 16 datalines
- 28 addresslines
- Controllines:
- 7x Chip Enable : CE0, CE1, CE2, CE3, CE4, CE5, cE6
- RBW : I/O R, I/O B, I/O W
- 2x BWE
- SWE
- Output Enable
- Reset
- Ready
- INT
- Other:
- 3x MODlines
- 4x clocklines
- Tristate
Notes
On CEX , DEX , ARC consoles with NAND, only 256MB (2x 128MB) is used.
On DECR consoles with NAND, only 256 MB (1x 258MB) is used (although there is an empty TSOP pad for a second one).
This points that the EBUS needs to address at least 512MB
Hardware lines / pads
| No. | TP Name | Usage | COK-001 | COK-002 | SEM-001 | Remark |
|---|---|---|---|---|---|---|
| 0 | JL9300 | RESET | - | /SB_EBUS_RESET (/EBUSRESETZ / AL29) | /SB_EBUS_RESET (/EBUSRESETZ / P29) | |
| 1 | JL9301 | MOD0 | /SB_MOD0 (MODZ0 / W8) | /SB_MOD0 (MODZ0 / J30) | ||
| 55 | - | MOD1 | /SB_MOD1 (MODZ1 / V8) | |||
| 56 | - | MOD2 | /SB_MOD2 (MODZ2 / U8) | |||
| 2 | JL9302 | SYSCLK | SB_EBUS_SYSCLK (EBUSSYSCLK / W1) | SB_EBUS_SYSCLKO0 | SB_EBUS_SYSCLKO0 | |
| 57 | - | CLK | SB_EBUS_CLK (EBUSCLK / AJ30) | SB_EBUS_CLK (EBUSCLK / F30) | ||
| 58 | - | CLK | SB_EBUS_CLK0[0] (/SB_EBUS_CLKO0 / AD28) | SB_EBUS_CLK0[0] (/SB_EBUS_CLKO0 / G30) | ||
| 59 | - | CLK | SB_EBUS_CLK0[1] (/SB_EBUS_CLKO1 / AD29) | SB_EBUS_CLK0[1] (/SB_EBUS_CLKO0 / F29) | ||
| 3 | JL9303 | IOR/BE | /SB_EBUS_IOR | SB_EBUS_BE (/EBUSBEZ / AE31) | SB_EBUS_BE (/EBUSBEZ / G29) | |
| 60 | - | IOR | /SB_BUS_IOR (EBUSIORZ / N3) | |||
| 61 | - | IOW | - (EBUSIOWZ / N4) | |||
| 4 | JL9304 | SWE | /SB_EBUS_SWE (/EBUSSWEZ / M4) | /SB_EBUS_SWE (/EBUSSWEZ / AK29) | /SB_EBUS_SWE (/EBUSSWEZ / N30) | |
| 5 | JL9305 | OE | /SB_EBUS_OE (/EBUSOEZ / L5) | /SB_EBUS_OE (/EBUSOEZ / AK25) | /SB_EBUS_OE (/EBUSOEZ / V30) | |
| 62 | - | BWE0 | - (/EBUSBWEZ[0] / W2) | - (/EBUSBWEZ[0] / AC31) | - (/EBUSBWEZ[0] / G27) | |
| 63 | - | BWE1 | - (/EBUSBWEZ[1] / W3) | - (/EBUSBWEZ[1] / AB28) | - (/EBUSBWEZ[1] / G26) | |
| 64 | - | CE6 | - (EBUSCEZ[6] / L7) | - | - | |
| 65 | - | CE4 | - (EBUSCEZ[4] / K5) | - | - | |
| 66 | - | CE5 | - (EBUSCEZ[5] / K7) | - | - | |
| 67 | - | CE3 | - (EBUSCEZ[3] / J7) | - (EBUSCEZ[3] / AJ23) | - (/EBUSCEZ[3] / Y27) | |
| 6 | JL9306 | CE2 | /SB_EBUS_CE2 (/EBUSCEZ[2] / J5) | /SB_EBUS_CE2 (/EBUSCEZ[2] / AH23) | /SB_EBUS_CE2 (/EBUSCEZ[2] / Y30) | |
| 68 | CL3005 / CL3002 / CL3012 | CE1 | - (EBUSCEZ[1] / J7) | - (EBUSCEZ[1] / AJ24) | - (EBUSCEZ[1] / Y29) | |
| 7 | JL9307 | CE0 | /SB_EBUS_CE0 (/EBUSCEZ[0] / H5) | /SB_EBUS_CE0 (/EBUSCEZ[0] / AL25) | /SB_EBUS_CE0 (/EBUSCEZ[0] / W29) | |
| 8 | JL9308 | ACK/RDY | /SB_EBUS_ACK (/EBUSACKZ / V3) | /SB_EBUS_RDY (EBUSRDY / AH22) | /SB_EBUS_RDY (EBUSRDY / AA29) | |
| 9 | JL9309 | BRDY | SS2_BRDY | SS2_BRDY | SS2_BRDY | |
| 10 | JL9310 | INT | /SS2_INT | /SB_EBUS_INT (/EBUSINTZ / AJ22) | /SB_EBUS_INT (/EBUSINTZ / AA30) | |
| 11 | JL9311 | GND | Ground | Ground | Ground | |
| 12 | JL9312 | GND | Ground | Ground | Ground | |
| 13 | JL9313 | GND | Ground | Ground | Ground | |
| 14 | JL9314 | GND | Ground | Ground | Ground | |
| 15 | JL9315 | GND | Ground | Ground | Ground | |
| 16 | JL9316 | GND | Ground | Ground | Ground | |
| 17 | JL9317 | GND | Ground | Ground | Ground | |
| 18 | JL9318 | GND | Ground | Ground | Ground | |
| 19 | JL9319 | GND | Ground | Ground | Ground | |
| 20 | JL9320 | GND | Ground | Ground | Ground | |
| 69 | - | A27 | - (EBUSADDR[27] / H4) | - (EBUSADDR[27] / AL23) | - SB_EBUS_ADDR0 (EBUSADDR[27] / W27) | |
| 70 | - | A26 | - (EBUSADDR[26] / H3) | - (EBUSADDR[26] / AK23) | - SB_EBUS_ADDR0 (EBUSADDR[26] / W26) | |
| 71 | - | A25 | - (EBUSADDR[25] / V4) | - (EBUSADDR[25] / AC30) | - SB_EBUS_ADDR0 (EBUSADDR[25] / H26) | |
| 72 | - | A24 | - (EBUSADDR[24] / U2) | - (EBUSADDR[24] / AC29) | - SB_EBUS_ADDR0 (EBUSADDR[24] / H27) | |
| 73 | - | A23 | - (EBUSADDR[23] / U3) | - (EBUSADDR[23] / AC28) | - SB_EBUS_ADDR0 (EBUSADDR[23] / H29) | |
| 74 | - | A22 | - (EBUSADDR[22] / U1) | - (EBUSADDR[22] / AE29) | - SB_EBUS_ADDR0 (EBUSADDR[22] / H30) | |
| 75 | - | A21 | - (EBUSADDR[21] / M3) | - (EBUSADDR[21] / AJ29) | - SB_EBUS_ADDR0 (EBUSADDR[21] / P26) | |
| 76 | - | A20 | - (EBUSADDR[20] / N1) | - (EBUSADDR[20] / AJ31) | - SB_EBUS_ADDR0 (EBUSADDR[20] / N27) | |
| 77 | - | A19 | - (EBUSADDR[19] / N2) | - (EBUSADDR[19] / AH28) | - SB_EBUS_ADDR0 (EBUSADDR[19] / N26) | |
| 78 | - | A18 | - (EBUSADDR[18] / L4) | - (EBUSADDR[18] / AJ28) | - SB_EBUS_ADDR0 (EBUSADDR[18] / P27) | |
| 21 | JL9321 | A17 | SB_EBUS_ADDR17 (EBUSADDR[17] / L3) | SB_EBUS_ADDR17 (EBUSADDR[17] / AH27) | SB_EBUS_ADDR0 (EBUSADDR[17] / P30) | |
| 22 | JL9322 | A16 | SB_EBUS_ADDR16 (EBUSADDR[16] / U4) | SB_EBUS_ADDR16 (EBUSADDR[16] / AE30) | SB_EBUS_ADDR0 (EBUSADDR[16] / J29) | |
| 23 | JL9323 | A15 | SB_EBUS_ADDR15 (EBUSADDR[15] / T4) | SB_EBUS_ADDR15 (EBUSADDR[15] / AE28) | SB_EBUS_ADDR0 (EBUSADDR[15] / J30) | |
| 24 | JL9324 | A14 | SB_EBUS_ADDR14 (EBUSADDR[14] / T3) | SB_EBUS_ADDR14 (EBUSADDR[14] / AF29) | SB_EBUS_ADDR0 (EBUSADDR[14] / K29) | |
| 25 | JL9325 | A13 | SB_EBUS_ADDR13 (EBUSADDR[13] / R4) | SB_EBUS_ADDR13 (EBUSADDR[13] / AF28) | SB_EBUS_ADDR0 (EBUSADDR[13] / K30) | |
| 26 | JL9326 | A12 | SB_EBUS_ADDR12 (EBUSADDR[12] / R3) | SB_EBUS_ADDR12 (EBUSADDR[12] / AG31) | SB_EBUS_ADDR0 (EBUSADDR[12] / L29) | |
| 27 | JL9327 | A11 | SB_EBUS_ADDR11 (EBUSADDR[11] / R2) | SB_EBUS_ADDR11 (EBUSADDR[11] / AG30) | SB_EBUS_ADDR0 (EBUSADDR[11] / L30) | |
| 28 | JL9328 | A10 | SB_EBUS_ADDR10 (EBUSADDR[10] / R1) | SB_EBUS_ADDR10 (EBUSADDR[10] / AG29) | SB_EBUS_ADDR0 (EBUSADDR[10] / M29) | |
| 29 | JL9329 | A9 | SB_EBUS_ADDR9 (EBUSADDR[8] / P4) | SB_EBUS_ADDR9 (EBUSADDR[9] / AG28) | SB_EBUS_ADDR0 (EBUSADDR[9] / M30) | |
| 30 | JL9330 | A8 | SB_EBUS_ADDR8 (EBUSADDR[8] / P3) | SB_EBUS_ADDR8 (EBUSADDR[8] / AH29) | SB_EBUS_ADDR0 (EBUSADDR[8] / N29) | |
| 31 | JL9331 | A7 | SB_EBUS_ADDR7 (EBUSADDR[7] / L2) | SB_EBUS_ADDR7 (EBUSADDR[7] / AJ25) | SB_EBUS_ADDR0 (EBUSADDR[7] / R29) | |
| 32 | JL9332 | A6 | SB_EBUS_ADDR6 (EBUSADDR[6] / L1) | SB_EBUS_ADDR6 (EBUSADDR[6] / AK27) | SB_EBUS_ADDR0 (EBUSADDR[6] / R30) | |
| 33 | JL9333 | A5 | SB_EBUS_ADDR5 (EBUSADDR[5] / K4) | SB_EBUS_ADDR5 (EBUSADDR[5] / AL27) | SB_EBUS_ADDR0 (EBUSADDR[5] / T29) | |
| 34 | JL9334 | A4 | SB_EBUS_ADDR4 (EBUSADDR[4] / K3) | SB_EBUS_ADDR4 (EBUSADDR[4] / AH26) | SB_EBUS_ADDR0 (EBUSADDR[4] / T30) | |
| 35 | JL9335 | A3 | SB_EBUS_ADDR3 (EBUSADDR[3] / J3) | SB_EBUS_ADDR3 (EBUSADDR[3] / AJ25) | SB_EBUS_ADDR0 (EBUSADDR[3] / U29) | |
| 36 | JL9336 | A2 | SB_EBUS_ADDR2 (EBUSADDR[2] / J2) | SB_EBUS_ADDR2 (EBUSADDR[2] / AH25) | SB_EBUS_ADDR0 (EBUSADDR[2] / U30) | |
| 37 | JL9337 | A1 | SB_EBUS_ADDR1 (EBUSADDR[1] / J1) | SB_EBUS_ADDR1 (EBUSADDR[1] / AJ25) | SB_EBUS_ADDR0 (EBUSADDR[1] / V29) | |
| 38 | JL9338 | A0 | SB_EBUS_ADDR0 (EBUSADDR[0] / J4) | SB_EBUS_ADDR0 (EBUSADDR[0] / AH24) | SB_EBUS_ADDR0 (EBUSADDR[0] / W30) | |
| 39 | JL9339 | D15 | SB_EBUS_DATA15 (EBUSDATA[15] / W7) | SB_EBUS_DATA15 (EBUSDATA[15] / AB26) | SB_EBUS_DATA15 (EBUSDATA[15] / J26) | |
| 40 | JL9340 | D14 | SB_EBUS_DATA14 (EBUSDATA[14] / V7) | SB_EBUS_DATA14 (EBUSDATA[14] / AC26) | SB_EBUS_DATA14 (EBUSDATA[14] / K26) | |
| 41 | JL9341 | D13 | SB_EBUS_DATA13 (EBUSDATA[13] / U7) | SB_EBUS_DATA13 (EBUSDATA[13] / AD26) | SB_EBUS_DATA13 (EBUSDATA[13] / L26) | |
| 42 | JL9342 | D12 | SB_EBUS_DATA12 (EBUSDATA[12] / T7) | SB_EBUS_DATA12 (EBUSDATA[12] / AE26) | SB_EBUS_DATA12 (EBUSDATA[12] / M26) | |
| 43 | JL9343 | D11 | SB_EBUS_DATA11 (EBUSDATA[11] / R7) | SB_EBUS_DATA11 (EBUSDATA[11] / AF26) | SB_EBUS_DATA11 (EBUSDATA[11] / R26) | |
| 44 | JL9344 | D10 | SB_EBUS_DATA10 (EBUSDATA[10] / P7) | SB_EBUS_DATA10 (EBUSDATA[10] / AB24) | SB_EBUS_DATA10 (EBUSDATA[10] / T26) | |
| 45 | JL9345 | D9 | SB_EBUS_DATA9 (EBUSDATA[9] / N7) | SB_EBUS_DATA9 (EBUSDATA[9] / AE23) | SB_EBUS_DATA9 (EBUSDATA[9] / U26) | |
| 46 | JL9346 | D8 | SB_EBUS_DATA8 (EBUSDATA[8] / M7) | SB_EBUS_DATA8 (EBUSDATA[8] / AE22) | SB_EBUS_DATA8 (EBUSDATA[8] / V26) | |
| 47 | JL9347 | D7 | SB_EBUS_DATA7 (EBUSDATA[7] / W5) | SB_EBUS_DATA7 (EBUSDATA[7] / AB25) | SB_EBUS_DATA7 (EBUSDATA[7] / J27) | |
| 48 | JL9348 | D6 | SB_EBUS_DATA6 (EBUSDATA[6] / V5) | SB_EBUS_DATA6 (EBUSDATA[6] / AC25) | SB_EBUS_DATA6 (EBUSDATA[6] / K27) | |
| 49 | JL9349 | D5 | SB_EBUS_DATA5 (EBUSDATA[5] / U5) | SB_EBUS_DATA5 (EBUSDATA[5] / AD25) | SB_EBUS_DATA5 (EBUSDATA[5] / L27) | |
| 50 | JL9350 | D4 | SB_EBUS_DATA4 (EBUSDATA[4] / T5) | SB_EBUS_DATA4 (EBUSDATA[4] / AE25) | SB_EBUS_DATA4 (EBUSDATA[4] / M27) | |
| 51 | JL9351 | D3 | SB_EBUS_DATA3 (EBUSDATA[3] / R5) | SB_EBUS_DATA3 (EBUSDATA[3] / AF25) | SB_EBUS_DATA3 (EBUSDATA[3] / R27) | |
| 52 | JL9352 | D2 | SB_EBUS_DATA2 (EBUSDATA[2] / P5) | SB_EBUS_DATA2 (EBUSDATA[2] / AF24) | SB_EBUS_DATA2 (EBUSDATA[2] / T27) | |
| 53 | JL9353 | D1 | SB_EBUS_DATA1 (EBUSDATA[1] / N5) | SB_EBUS_DATA1 (EBUSDATA[1] / AF23) | SB_EBUS_DATA1 (EBUSDATA[1] / U27) | |
| 54 | JL9354 | D0 | SB_EBUS_DATA0 (EBUSDATA[0] / M5 | SB_EBUS_DATA0 (EBUSDATA[0] / AF22) | SB_EBUS_DATA0 (EBUSDATA[0] / V27) |