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leonardo: update notes

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hap 2021-12-13 16:03:01 +01:00
parent e098825c3c
commit c6260e6209
2 changed files with 16 additions and 8 deletions
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5
src/devices/bus/saitek_osa/sparc.cpp
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@ -11,6 +11,11 @@ Hardware notes:
- Fujitsu MB86930-20 SPARClite @ 20MHz
- 256KB ROM (4*AMD AM27C512)
- 1MB DRAM (8*NEC 424256-60), expandable to 4MB
- ESAN 31A-5500 delay line (only on newer PCB)
Two PCB revisions are known, the older one is a lighter green PCB, it has
empty positions for more ICs (maybe expanded RAM?), and does not have a
delay line chip.
The module doesn't have its own LCD screen. It has a grill+fan underneath
at the front part, and a heatsink on the CPU.

19
src/mame/drivers/saitek_leonardo.cpp
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@ -9,10 +9,10 @@ This is SciSys's answer to H+G Mephisto modular chesscomputers, but unlike the
Mephistos, these boards are actual chesscomputers and not an accessory.
They called the expansion capability "OSA", for "Open Systems Architecture".
One for a link port to a PC, and one for a module slot. The expansion modules
are basically entire chesscomputers, making the whole thing combined a
'dual brain' chesscomputer. The embedded chess engine is by Julio Kaplan
and Craig Barnes, same as the one in SciSys Turbo S-24K.
A serial port for linking to a PC, and a parallel port for expansion modules.
The expansion modules are basically entire chesscomputers, making the whole
thing combined a 'dual brain' chesscomputer. The embedded chess engine is by
Julio Kaplan and Craig Barnes, same as the one in SciSys Turbo S-24K.
Hardware notes:
@ -35,15 +35,18 @@ Galileo PCB is different, but essentially it's the same hardware as Leonardo.
The 1.4 ROM is identical to it too, even though it's a different MCU type.
And on the outside, the button panel was redesigned a bit.
Expansion modules released:
Known expansion modules:
- Maestro (65C02, Kaplan/Barnes)
- Analyst (65C02, Kaplan/Barnes)
- Brute Force (prototype) (65C02?, Ulf Rathsman)
- Brute Force (H8, Frans Morsch)
- Sparc (SPARClite, Spracklen's)
The Sparc module doesn't appear to work on the 1st program version of Leonardo.
Moreover, the Sparc module manual mentions that for it to work properly on Leonardo,
the chesscomputer needs to be upgraded with an EMI PCB (power supply related).
The H8 Brute Force module doesn't work with the 1st program version of Leonardo,
this is mentioned in the repair manual and it says it requires an EPROM upgrade.
The Sparc module doesn't appear to work with it either. Moreover, the Sparc module
manual mentions that for it to work properly on Leonardo, the chesscomputer needs
to be upgraded with an EMI PCB (power supply related).
TODO:
- OSA module comms is not completely understood