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apple2: FocusDrive and ZIPDrive partition info documented and fixed to work. [R. Belmont]

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This commit is contained in:
arbee 2019-03-30 16:28:05 -04:00
parent da81381372
commit f0cfd857a1
1 changed files with 56 additions and 11 deletions
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67
src/devices/bus/a2bus/a2zipdrive.cpp
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@ -7,18 +7,62 @@
ZIP Technologies ZipDrive IDE card
Parsons Engineering Focus Drive IDE card
These cards are very, very similar. Maybe Parsons designed both?
These cards are basically identical, with
almost byte-identical firmware (written by "Burger" Becky).
NOTE: No known dump exists of the Zip formatter utility and the
format of the custom partition record (block 0) that the card
expects has not yet been determined, so this is largely untested
and will work only with a drive dump from real h/w.
Focus / ZIP partition sector (sector 0):
+000: "Parsons Engin" or "Zip Technolog"
+00e: String terminator 0
+00f: Number of partitions
+01c: Drive type (index into table of fixed geometries)
+020: Partition 0 start block
+024: Parition 0 block count
+028: P0 Write protect flag
+02d/02e/02f: Unknown (written by Focus s/w, not read by ROM or GS/OS driver)
+030: Partition 1 start block
+034: Partition 1 block count
+038: P1 write protect flag
+03d/03e/03f: Unknown (written by Focus s/w, not read by ROM or GS/OS driver)
+040: Partition 2
+050: Partition 3
+060: Partition 4
+070: Partition 5
+080: Partition 6
+090: Partition 7
[...]
+1E0: Partition 15
PLEASE use it only on a backup copy of said dump and contact MAMEdev
if you have one!
Sector 1:
+020: Partition 0 name
+040: Partition 1 name
+060: Partition 2 name
+080: Partition 3 name
+0a0: Partition 4 name
+0c0: Partition 5 name
+0e0: Partition 6 name
+100: Partition 7 name
[...]
+1E0: Partition 15 name
Partition block format:
+0000: ASCII "Zip Technologies"
Drive types:
Drive type 0: CHS=782,4,27, 84590 total blocks, capacity 43 MB
Drive type 1: CHS=782,3,27, 63449 total blocks, capacity 32 MB
Drive type 2: CHS=782,2,27, 42308 total blocks, capacity 21 MB
Drive type 3: CHS=1334,2,33, 88142 total blocks, capacity 45 MB
Drive type 4: CHS=1334,4,33, 176252 total blocks, capacity 90 MB
Drive type 5: CHS=1334,6,33, 264362 total blocks, capacity 135 MB
Drive type 6: CHS=1334,8,33, 352472 total blocks, capacity 180 MB
Drive type 7: CHS=670,4,31, 83234 total blocks, capacity 42 MB
Drive type 8: CHS=977,2,43, 84150 total blocks, capacity 43 MB
Drive type 9: CHS=614,4,17, 41836 total blocks, capacity 21 MB
Drive type 10: CHS=65535,5,17, 5570576 total blocks, capacity -1442 MB (???)
Drive type 11: CHS=872,4,24, 83831 total blocks, capacity 42 MB
Drive type 12: CHS=977,5,17, 83146 total blocks, capacity 42 MB
Drive type 13: CHS=547,4,38, 83333 total blocks, capacity 42 MB
Drive type 14: CHS=977,4,43, 168258 total blocks, capacity 86 MB
Drive type 15: CHS=973,4,43, 167570 total blocks, capacity 85 MB
Drive type 16: CHS=791,3,35, 83194 total blocks, capacity 42 MB
Drive type 17: CHS=548,8,38, 166933 total blocks, capacity 85 MB
*********************************************************************/
@ -108,6 +152,7 @@ void a2bus_zipdrivebase_device::device_start()
void a2bus_zipdrivebase_device::device_reset()
{
m_rom[0x1c44] = 0x03;
}
void a2bus_focusdrive_device::device_reset()
@ -134,7 +179,7 @@ uint8_t a2bus_zipdrivebase_device::read_c0nx(uint8_t offset)
return m_ata->read_cs0(offset, 0xff);
case 8: // data port
m_lastdata = m_ata->read_cs0(offset, 0xffff);
m_lastdata = m_ata->read_cs0(0, 0xffff);
// printf("%04x @ IDE data\n", m_lastdata);
return m_lastdata&0xff;
@ -164,7 +209,7 @@ uint8_t a2bus_focusdrive_device::read_c0nx(uint8_t offset)
return m_ata->read_cs0(offset&7, 0xff);
case 0: // data port
m_lastdata = m_ata->read_cs0(offset, 0xffff);
m_lastdata = m_ata->read_cs0(0, 0xffff);
//printf("%04x @ IDE data\n", m_lastdata);
return m_lastdata&0xff;