GRiDCASE 1537E hardware

Last revised: 19 Jan 2001

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HDD slot

 

 

 

 

 

 

 

 

 

 

Table1, Onboard chips

Chip Type
U1 14069U (Motorola)
U2 74HC125A
U3 74HC125D
U4 74AC04
U5 74HC04
U6 P5C060-45
U7 74HC125A
U8 P8742AH KB CONTRLR 5/19/88 (D8F1) 300782-04 AK
U9 74HC137N
U10 74HC157N
U11 DS3692N
U12 AM26LS32ACN
U13 LM339
U14 F82C636
U15 74AC74
U16 AC04
U17 HC257N
U18 HC257N
U19 MC3488AP1
U20 HC74D
U21 AC08
U22 AC08
U23 DS1000M
U24 P5C032-35
U25 I387
U26 P5C032-35
U27 AM85C30-16JC
U28 TL16C452FN
U29 HC125D
U30 F82C206
U31 F82C841
U32
U33 AC08
U34 I80386-16
U35 P5C060-45
U36 74HCT244A
U37 AM26LS32ACN
U38 AC573
U39 74AC244
U40 74AC244
U41 74AC245
U42 P5C032-35
U43 F82C842
U44 AIC-6260AL
U45 74AC244
U46 MAX241CW1
U47 74AC244
U48 74AC244
U49 74AC245
U50 74AC245
U51 74AC244
U52 SIMM 30 pin
U53 SIMM 30 pin
U54 SIMM 30 pin
U55 SIMM 30 pin
U56 SIMM 30 pin
U57 SIMM 30 pin
U58 SIMM 30 pin
U59 SIMM 30 pin
U60 HCT245A
U61 HCT245A
U62 OKI M41464-12
U63 OKI M41464-12
U64 74AC244
U65 AM27C512
U66 AM27C512
U67 OKI M41464-12
U68 OKI M41464-12
U69 Bt476KPJ35
U70 OKI M41464-12
U71 OKI M41464-12
U72 F82C455
U73 74AC244
U74 LM339M
U75 OKI M41464-12
U76 OKI M41464-12
U77 74HC157N

The design is based on LeAPset CS8283 CHIPSet, that comprises highly integrated application specific integrated circuits that emulate the control logic of IBM PC AT-compatible computers. Additionally, this chipset provides functions designed specifically for the laptop comp.

BIOS features and hot keys:

      · (Ctrl,Alt - Tab) Toggle built in/external display

· (Ctrl,Alt - BkSp) toggles built in mode (positive/negative image)

· To boot from floppy, you can hold down the "F" key during boot and it should boot from the floppy unless it is dead

· To force boot from HDD, you can hold down the "H" key during boot

BIOS checksums:

· 52A2 for EVEN

· 185E for ODD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal HDD connector

Connector model:

HYPERTRONICS CAGE/FSCM50541 KA53/127BPMB10T-554 9101

As I was unable to find any suitable female part of this connector on the market, I’ve bought two 40-pin SIP sockets, cutted them to appropriate length and glued them together – an got nice 53-pin socket. Power connector was replaced by standard coax as well. Power supply unit works fine with my Compaq portable mains power supply ( 19V, 3A).

Table 2

Pin # Direction IDE socket pin Description Signal path [pin #] chip
53
---> Power connector +12 V Power Q4
52
---> Power connector +12 V Power Q4
51
 ---> Power connector +12 V Power Q4
50
 ---> Power connector +12 V Power Q4
49
 ---> Power connector +12 V Power Q4
48
 ---> Power connector +5 V Power Q2
47
 ---> Power connector +5 V Power Q2
46
 ---> Power connector +5 V Power Q2
45
 ---> Power connector +5 V Power Q2
44
 ---> Power connector +5 V Power Q2
43
 ---- Power connector Power ground
42
 <==> 18 Data 15 [18] U61 <=> [2] U61 <=> [102] U43
41
 ----   Signal ground  
40
 <==> 16 Data 14 [17] U61 <=> [3] U61 <=> [101] U43
39
 ----   Signal ground  
38
 ----   Signal ground  
37
 <==> 17 Data 0 [11] U60 <=> [9] U60 <=> [84] U43
36
 <==> 14 Data 13 [16] U61 <=> [4] U61 <=> [100] U43
35
 <==> 15 Data 1 [12] U60 <=> [8] U60 <=> [85] U43
34
 <==> 12 Data 12 [15] U61 <=> [5] U61 <=> [99] U43
33
 ---- Signal ground  
32
 ----   Signal ground  
31
 <==> 13 Data 2 [13] U60 <=> [7] U60 <=> [86] U43
30
 <==> 10 Data 11 [14] U61 <=> [6] U61 <=> [98] U43
29
 <==> 11 Data 3 [14] U60 <=> [6] U60 <=> [87] U43
28
 <==> 8 Data 10 [13] U61 <=> [7] U61 <=> [97] U43
27
 ----   Signal ground  
26
 ----   Signal ground  
25
 <==> 9 Data 4 [15] U60 <=> [5] U60 <=> [88] U43
24
 <==> 6 Data 9 [12] U61 <=> [8] U61 <=> [96] U43
23
 <==> 7 Data 5 [16] U60 <=> [4] U60 <=> [92] U43
22
 <==> 4 Data 8 [11] U61 <=> [9] U61 <=> [95] U43
21
 ----   Signal ground  
20
 ---> 23 /IOW [14] U36 <- [6] U36
19
 <==> 5 Data 6 [17] U60 <=> [3] U60 <=> [93] U43
18
 ---> 25 /IOR [1] U33,[6] U35 <- [35] U31
17
 <==> 3 Data 7 [18] U60 <=> [2] U60 <=> [94] U43
16
 ----   Signal ground  
15
 ----   Signal ground  
14
 <--- 31 IRQR -> [8] U36 -> [12] U36 -> [80] U30
13
 --->   ??? 28 ALE <- [9] U36 <- [11] U36
12
 ----   Signal ground  
11
 <---   HDD latched -> [3] U22 -> [4] U22 -> [37] U14 (PIO11)
10
 ---> 33 DA1  
9
 <---   ??? 27 IO_CH_RDY -> [2] U36 <- [18] U36 …
8
 ----   Signal ground  
7
 ----   Signal ground  
6
 ---> 35 DA0 <- [7] U36…
5
 ---> 36 DA2 <- [3] U36 …
4
 --->   ??? 37 /IDE_CS0 <- [17] U35 <- …
3
 --->   ??? 38 /IDE_CS0 <- [18] U35 <- …
2
 <--- 39 /ACTIVE Led -> [1] U5 ->
1
 ---- 2 Signal ground  

 

SHARP LJ64AU31 gas plasma display (VGA 640x480)

SHARP guys appeared being not much user-friendly lol, so I failed to get any info from them. No any old datasheets on their pages - no any traces of these gas plasma modules on SHARP sites.

Table 3, Gas plasma display unit connector pinout

Display socket pin # Function Wire color Ext Plug pin
1
 Ground (Serial Data 1) Dark Blue 1
2
 Serial Data 1 Red 2
3
 Ground (Serial Data 2) Green 3
4
 Serial Data 2 Yellow 4
5
 Ground (Serial Clock) White 5
6
 Serial Clock Brown 6
7
 Ground (V Frame Sync) Grey 7
8
 V Frame Sync Black 8
9
 Ground (H Frame Sync) Orange 9
10
 H Frame Sync Blue 10
11
 NC
12
 Ground Dark Blue 11
13
 Ground
14
 Power (+5V) Black/White 12
15
 Power (+5V) Red/White 13
16
 Ground
17
 Ground
18
 Power +24 V
19
 Power +24 V Yellow/White 14
20
 Power +24 V Blue/White 15

All data and clock inputs (2,4,6,8,10) are loaded internally with 60-Ohm resistors. All data wires are twisted in pairs.

PCB has 6 x Hitachi ECN2012 on the left side and 6 x Hitachi ECN2002 chips mounted on the right side on flex PCB.

8xSHARP LZ1440 and 8 more items are mounted on top and bottom sides of the PCB.

These flex PCBs are connected to the main PCB by four 15-wire flat flex cables.

In the center of the board SHARP LZ93N34 and Toshiba TC54256AF (EPROM) chips are mounted. There are also two SHARP PC9D17 chips soldered.