Guides:MAME - Driver - ct486
Some notes on the ct486 driver
HDD Geometries
These geoms are for Type 47 (custom) drives, the sha is unimportant, you can just create these with chdman createhd --chs C,H,S
| Size | CHS | Type | SHA |
|---|---|---|---|
| 4GB | 8332,16,63 | Uncompressed | febb149519369f4293b2d94b1b5ebc973791dd76 |
| 2GB | 10838,9,43 | Uncompressed | fc3b4ca3770ac38ba3a3dc0d5a5fad97aa1f0ad9 |
| 1GB | 2048,16,63 | - | - |
| 500M | 1015,16,63 | - | - |
| 100M | 256,16,50 | - | - |
The sha is here because these disks are in the wild and you can grab them instead of doing the work. Uncompressed CHDs do not have an internal sha, so these were external calcs with sha1sum
nvram
When/if you change out the CHD underneath this machine you will need to reconfigure the HDD Type 47 geometry to match, alternatively backup the nvram file in ct486 folder and re-instate it with the machine you are booting
Slot Devices
Some useful slot devices
| Device Type | Slot Option | Device Option |
|---|---|---|
| Floppy Drive | - | -flop1 ${FLOPPATH}/${FLOP1}
|
| IDE HDD Primary | -board3:ide:ide:0 hdd |
-hard1 ${HDDPATH}/${HARD1}
|
| IDE CDROM Secondary | -board3:ide:ide:1 cdrom |
-cdrom ${CDPATH}/${CDROM}
|
as of MAME 229, the isa ide slot device (card) causes a hdd controller failure on boot (haven't worked out why yet). if you want to try it out the format is (attached device type will be cdrom in this example).
Noting that the cli device chain provides each additional option as you build it, e.g. for an emulated IDE isa card
The theory is
- Plug in the device card type to the isa slot
-<slot> <device>enabling device endpoints - Define the device endpoint and attach a device type
-<slot>:<device>:<bus>:<id> <attached device type> - Attach media to the device type
-cdrom <path/to/cdimage>
./mame ct486 -isa3 ide -isa3:ide:ide:0 cdrom -cdrom /path/to/media.iso